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Rivera-Coley K, Augusto Reynalte-Tataje D, Atencio-Garcia V, Campo O, Jímenez-Segura L. ¿Where do migratory fish spawn in a neotropical Andean basin regulated by dams? PLoS One 2023; 18:e0291413. [PMID: 37856532 PMCID: PMC10586612 DOI: 10.1371/journal.pone.0291413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 08/29/2023] [Indexed: 10/21/2023] Open
Abstract
Spawning sites play a key role in the reproduction of fish allowing populations to endure over time. The Nechí River is an important spawning area for potamodromous fish species where one of the threats is dam construction. In order to determine the importance of the Nechí River as a spawning site in the Magdalena River basin, sampling was conducted during the low-water-to-high-water season transition period between 2018 and 2019 at seven sampling sites. The average density of ichthyoplankton was 42.4 ind.10m-3 (SD = 7.1). Of the individuals in the post-larval stage, seven migratory species were identified, and two additional taxa were identified to genus; Prochilodus magdalenae, Megaleporinus muyscorum, and Pseudoplatystoma magdaleniatum presented the greatest density. At the temporal level, the greatest density of larvae of potamodromous species was observed in the first high-water season of 2019 with a total of 5.7 ind.10m-3(SD = 1.044), of which the most representative at the seasonal level were the Cauca River, Magdalena River, and Nechí River before it flows into the Cauca River. There were significant differences in the frequency of embryos and vitelline larvae of the potamodromous species in the interaction of the sampling sites and high-water seasons, as well as with the density of post-larvae. The average drift distance of the spawning areas is roughly 52.1 km. A positive association was found between the volume of turbined water and the presence of ichthyoplankton in the Porce River site, after discharge from the Porce III Hydroelectric Plant. The Nechí River is an important spawning site and there seems to be an association between the increase in ichthyoplankton densities and the distance to the dam (Porce III) as long as there are floodplains along the course of the river.
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Affiliation(s)
- Kelly Rivera-Coley
- Department of Biology, Ichthyology Group of the Universidad de Antioquia, Universidad de Antioquia, Medellín, Antioquia, Colombia
| | - David Augusto Reynalte-Tataje
- Postgraduate Program of Environment and Sustainable Technologies (PPGATS), Fronteira Sul University (UFFS), Cerro Largo, RS, Brazil
| | | | - Omer Campo
- Molecular Genetics Group, Universidad de Antioquia, Medellín, Antioquia, Colombia
| | - Luz Jímenez-Segura
- Department of Biology, Ichthyology Group of the Universidad de Antioquia, Universidad de Antioquia, Medellín, Antioquia, Colombia
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Viana IKS, Ferreira MAP, Mendes YA, Silva BRM, Gonçalves LA, Rocha RM. Follicular complex may predict reproductive tactics in siluriform fishes. Heliyon 2023; 9:e16204. [PMID: 37234639 PMCID: PMC10205519 DOI: 10.1016/j.heliyon.2023.e16204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 03/12/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
In this study, we evaluated the morphology and morphometry of the layers that make up the follicular complex surrounding mature oocytes in the six fish species Auchenipterichthys longimanus, Ageneiosus ucayalensis, Hypophthalmus marginatus, Baryancistrus xanthellus, Panaqolus tankei and Peckoltia oligospila, belonging to the order Siluriformes, which inhabit the Amazon basin. On the basis of the morphology and thickness of the layers of the follicular complex, the species were divided into two groups: 1- A. longimanus, A. Ucayalensis and H. marginatus and 2 - B. xanthellus, P. tankei and P. oligospila. The total thickness of the layers that make up the follicular complex showed a difference between type III and IV oocytes for all species of each group. Differences in the theca layer, follicular cells and zona radiata between species and between groups were submitted to statistical analysis. Morphologically, group 1 showed columnar follicular cells and thin zona radiata. Meanwhile, group 2 displayed a layer of cuboidal-shaped follicular cells layer and thicker zona radiata. These differences may be related to the environment and reproductive behaviors, as group 1 migrates without parental care and has eggs that are generally smaller and abundant. While group 2, represented by loricariidae, inhabit lotic environments, have reproductive tactics of parental care and eggs that are generally large and in small numbers. Therefore, we can infer that the follicular complex in mature oocytes can predict the reproductive tactics of the species.
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Affiliation(s)
- Ivana Kerly S. Viana
- Laboratory of Cellular Ultrastructure, Institute of Biological Sciences, Federal University of Pará, 66075-110, Belém, Pará, Brazil
| | - Maria Auxiliadora P. Ferreira
- Laboratory of Immunohistochemistry and Developmental Biology, Institute of Biological Sciences, Federal University of Pará, 66075-110, Belém, Pará, Brazil
| | - Yanne A. Mendes
- Laboratory of Immunohistochemistry and Developmental Biology, Institute of Biological Sciences, Federal University of Pará, 66075-110, Belém, Pará, Brazil
| | - Breno Richard M. Silva
- Laboratory of Immunohistochemistry and Developmental Biology, Institute of Biological Sciences, Federal University of Pará, 66075-110, Belém, Pará, Brazil
| | - Liziane A.B. Gonçalves
- Laboratory of Cellular Ultrastructure, Institute of Biological Sciences, Federal University of Pará, 66075-110, Belém, Pará, Brazil
| | - Rossineide M. Rocha
- Laboratory of Cellular Ultrastructure, Institute of Biological Sciences, Federal University of Pará, 66075-110, Belém, Pará, Brazil
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Caldas B, Thieme ML, Shahbol N, Coelho ME, Grill G, Van Damme PA, Aranha R, Cañas C, Fagundes CK, Franco‐León N, Herrera‐Collazos EE, Jézéquel C, Montoya M, Mosquera‐Guerra F, Oliveira‐da‐Costa M, Paschoalini M, Petry P, Oberdorff T, Trujillo F, Tedesco PA, de Brito Ribeiro MCL. Identifying the current and future status of freshwater connectivity corridors in the Amazon Basin. CONSERVATION SCIENCE AND PRACTICE 2022. [DOI: 10.1111/csp2.12853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
| | | | | | | | | | | | | | - Carlos Cañas
- Bureau of Water Resource Information St. Johns River Water Management District Palatka Florida USA
| | - Camila K. Fagundes
- Wildlife Conservation Society (former) Brasilia Brazil
- Universidade Federal do Pampa (current) Uruguaiana, Rio Grande do Sul Brazil
| | | | | | - Céline Jézéquel
- Evolution et diversite biologique, UMR EDB, CNRS 5174, IRD253, UPS Toulouse France
| | | | | | | | - Mariana Paschoalini
- Aqualie Institute and Laboratory of Ecological Behavior and Bioacoutics of the Federal University of Juiz de Fora Juiz de Fora Minas Gerais Brazil
| | - Paulo Petry
- The Nature Conservancy, Latin America Freshwater Unit Hollis New Hampshire USA
| | - Thierry Oberdorff
- Evolution et diversite biologique, UMR EDB, CNRS 5174, IRD253, UPS Toulouse France
| | | | - Pablo A. Tedesco
- Evolution et diversite biologique, UMR EDB, CNRS 5174, IRD253, UPS Toulouse France
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Chuctaya J, Meza-Vargas V, Faustino-Fuster DR, Hidalgo M, Ortega H. Lista de especies de peces de la cuenca del Río Ucayali, Perú. REVISTA PERUANA DE BIOLOGÍA 2022. [DOI: 10.15381/rpb.v29i4.20049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
En este trabajo se presenta una lista actualizada de los registros de especies de peces de la cuenca del río Ucayali, Perú, provenientes de datos publicados y no publicados. Los resultados muestran que la cuenca del Ucayali presenta una ictiofauna rica y diversificada con el registro de 734 especies distribuidas en 15 órdenes, 49 familias y 292 géneros. La Ictiofauna está compuesta por peces miniatura (4%), peces pequeños (39%), medianos (41%), grandes (13%) y gigantes (3%). Los grupos dominantes son los Characiformes (312 especies, 43.0 %), Siluriformes (270 especies, 36.8%), Gymnotiformes (51 especies, 6.9%), y Cichliformes (50 especies, 6.8%). Parte de la ictiofauna es compartida con cuencas adyacentes como Marañón, y Amazonas peruano, principalmente en la región de confluencia, lo que contribuye a la notable diversidad de peces en la cuenca. Se observó una alta riqueza de especies con distribución restricta de los géneros Orestias, Astroblepus, Trichomycterus, Hemibrycon, entre otras especies, que ocurren en la región de cabeceras. Estimativos de riqueza de especies considerando su distribución por cada 100 m de altitud, indican que la cuenca del Ucayali esta subestimada, esperándose encontrar hasta 1125 especies. Los resultados aquí presentados son antecedentes que coadyuvaran a la toma de decisiones con fines de conservación y desarrollo sustentable en la región amazónica.
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Prestes L, Barthem R, Mello-Filho A, Anderson E, Correa SB, Couto TBD, Venticinque E, Forsberg B, Cañas C, Bentes B, Goulding M. Proactively averting the collapse of Amazon fisheries based on three migratory flagship species. PLoS One 2022; 17:e0264490. [PMID: 35235610 PMCID: PMC8890642 DOI: 10.1371/journal.pone.0264490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/12/2022] [Indexed: 11/19/2022] Open
Abstract
Migratory species are the most important commercial fishes in the Amazon. They are also now the most threatened directly by some combination of overfishing, floodplain deforestation, and dam construction. Limited governmental monitoring and implemented regulations impede adequate management of the fisheries at adequate scale. We summarize the current stock status of the three most heavily exploited long-distance migratory species, which are two goliath catfishes (Brachyplatystoma rousseauxii and B. vaillantii) and the characiform Colossoma macropomum. In addition, we analyze impacts beyond overfishing on these species. Our results indicate: (i) the overfishing trends for these important species are either ominous or indicate the verge of collapse of the commercial fisheries based on them, and (ii) a dangerous synergy between overfishing, hydroelectric dams, and floodplain deforestation further challenge fisheries management of migratory species in the Amazon. We propose eight direct governmental actions as a proactive approach that addresses the main impacts on the fisheries. We consider that the most practical way to assess and manage overfishing of migratory species in the short run in an area as large as the main commercial fishing area in the Amazon is at market sites where enforced regulations can control fish catch. The management of the three species considered here has implications beyond just their sustainability. Their management would represent a paradigm shift where the governments assume their legal responsibilities in fishery management. These responsibilities include regulation enforcement, data collecting, inter-jurisdictional cooperation to protect migratory species at realistic life history scales, mitigation of the Madeira dams to assure goliath catfish passage to the largest western headwater region, and recognition of monitoring and managing wetland deforestation for the protection of fish and other aquatic and terrestrial biodiversity.
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Affiliation(s)
- Luiza Prestes
- Programa de Graduação em Engenharia de Pesca, Universidade do Estado do Amapá, Macapá, Amapá, Brazil
| | - Ronaldo Barthem
- Museu Paraense Emílio Goeldi-Campus de Pesquisa-Coordenação de Ciências da Terra e Ecologia, Belém, Pará, Brazil
| | - Adauto Mello-Filho
- Programa de Pós-Graduação em Ecologia Aquática e Pesca, Universidade Federal do Pará, Belém, Pará, Brazil
| | - Elizabeth Anderson
- Florida International University, Institute of Environment, Miami, Florida, United States of America
| | - Sandra B. Correa
- Aquatic Ecology, Department of Wildlife, Fisheries and Aquaculture, Mississippi State University, Starville, Mississippi, United States of America
| | | | | | - Bruce Forsberg
- Vermont Department of Environmental Conservation, Montpelier, Vermont, United States of America
| | - Carlos Cañas
- Battelle, National Ecological Observatory Network, Gainesville, Florida, United States of America
| | - Bianca Bentes
- Laboratório de Biologia Pesqueira e Manejo de Recursos Aquáticos, Núcleo de Ecologia Aquática e Pesca, Universidade Federal do Pará, Belém, Pará, Brazil
| | - Michael Goulding
- Wildlife Conservation Society (WCS), New York, NY, United States of America
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Costa WJEM, Katz AM. A new catfish of the genus Trichomycterus from the Rio Paraíba do Sul Basin, south-eastern Brazil, a supposedly migrating species (Siluriformes, Trichomycteridae). ZOOSYST EVOL 2022. [DOI: 10.3897/zse.98.72392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A new species of the catfish genus Trichomycterus is described from the Rio Paraíba do Sul, south-eastern Brazil. This species exhibits some morphological character states that are unique amongst congeners, including a robust opercle and a long interopercle with numerous odontodes (50–60 opercular and 90–100 interopercular), a black bar on the basal portion of the caudal fin and a dark brown flank with a well delimited dorsal yellow stripe. It also exhibits some morphological traits that are uncommon amongst congeners, such as the presence of nine pectoral-fin rays. The presence of a shallow hyomandibular outgrowth and a ventrally expanded pre-opercular ventral flap suggests that this species is closely related to T. melanopygius, T. pradensis and T. tete. The new species also differs from T. melanopygius, T. pradensis and T. tete by having an emarginate caudal fin and a single median supra-orbital pore S6. Anecdotal evidence suggests that T. largoperculatus and T. pradensis have migratory habits, a condition not previously reported for eastern South American trichomycterines.
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Chhuoy S, Hogan ZS, Chandra S, Chheng P, Touch B, Utsugi K, Ngor PB. Daily otolith ring validation, age composition, and origin of the endangered striped catfish in the Mekong. Glob Ecol Conserv 2022. [DOI: 10.1016/j.gecco.2021.e01953] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Bonilla-Castillo CA, Vasquez AG, Córdoba EA, Hurtado GG, Vargas G, Duponchelle F. Life history trait variations and population dynamics of Calophysus macropterus (Siluriformes: Pimelodidae) in two river systems of the Colombian and Peruvian Amazon. NEOTROPICAL ICHTHYOLOGY 2022. [DOI: 10.1590/1982-0224-2021-0082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT The catfish Calophysus macropterus is heavily exploited in the Amazon basin, yet its life history characteristics are poorly documented, hampering proper fisheries management. In order to fill this gap, monthly sampling in the upper Putumayo River and in the Amazonas, lower Marañón and Ucayali (AMU) rivers were carried out over several years (2013-2015 in the AMU, 2013-2017 in the Putumayo) to provide detailed information about its reproduction, growth and mortality patterns (using length frequency data). Reproduction, which occurs during the dry and early flooding season, was only observed in the upper Putumayo River and not in the sampled portion of the AMU system, suggesting that the species reproduces closer to the Andes than other pimelodid catfishes. Size at first sexual maturity did not differ significantly among sex or among river systems, ranging from 25-28 cm SL. In both river systems, females had a faster growth than males and both genders also tended to have a better growth in the AMU than in the upper Putumayo. Mortality and exploitation estimate all indicated overexploitation of the species in both river systems. The implications of these results for fisheries management and conservation are discussed.
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Affiliation(s)
- César A. Bonilla-Castillo
- Instituto Amazónico de Investigaciones Científicas, Colombia; Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France
| | - Aurea García Vasquez
- Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France; Instituto de Investigaciones de la Amazonia Peruana, Peru
| | - Edwin Agudelo Córdoba
- Instituto Amazónico de Investigaciones Científicas, Colombia; Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France
| | - Guber Gómez Hurtado
- Instituto Amazónico de Investigaciones Científicas, Colombia; Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France
| | - Gladys Vargas
- Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France; Instituto de Investigaciones de la Amazonia Peruana, Peru
| | - Fabrice Duponchelle
- Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France; Univ. Montpellier, France
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Soares MDL, Massaro MV, Hartmann PB, Siveris SE, Pelicice FM, Reynalte-Tataje DA. The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River. NEOTROPICAL ICHTHYOLOGY 2022. [DOI: 10.1590/1982-0224-2021-0094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract Evidence indicates that migratory fish reproduce in the middle Uruguay River, but the location of spawning sites remains unknown. To identify spawning sites in the basin, fish eggs and larvae were sampled monthly between October 2016 and January 2017. The sampling was carried out in three sections along the middle Uruguay River, covering two environments: the main channel and the mouth of tributaries (Comandaí, Ijuí, and Piratinim rivers). A total of 11,519 eggs and 3,211 larvae were captured, belonged to ten migratory species. Eggs and larvae of migratory fishes, were widely distributed, with predominance of segmented eggs, and larvae in yolk-sac and pre-flexion stages, with higher densities near the confluence with the Piratinim River. Larvae assemblages showed spatial variation, indicating that spawning sites differ among migratory species. This study provides new information about fish reproduction in the middle Uruguay River, revealing that migratory species spawn in different localities along the main channel and tributaries. This region may function as a critical site for fish reproduction, although it is currently threatened by the risk of hydropower expansion, emphasizing the need for measures that preserve their environmental conditions, hydrological connectivity and ecological functions.
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Correa SB, van der Sleen P, Siddiqui SF, Bogotá-Gregory JD, Arantes CC, Barnett AA, Couto TBA, Goulding M, Anderson EP. OUP accepted manuscript. Bioscience 2022; 72:753-768. [PMID: 35923189 PMCID: PMC9343230 DOI: 10.1093/biosci/biac038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Riverine floodplains are biologically diverse and productive ecosystems. Although tropical floodplains remain relatively conserved and ecologically functional compared to those at higher latitudes, they face accelerated hydropower development, climate change, and deforestation. Alterations to the flood pulse could act synergistically with other drivers of change to promote profound ecological state change at a large spatial scale. State change occurs when an ecosystem reaches a critical threshold or tipping point, which leads to an alternative qualitative state for the ecosystem. Visualizing an alternative state for Amazonian floodplains is not straightforward. Yet, it is critical to recognize that changes to the flood pulse could push tropical floodplain ecosystems over a tipping point with cascading adverse effects on biodiversity and ecosystem services. We characterize the Amazonian flood pulse regime, summarize evidence of flood pulse change, assess potential ecological repercussions, and provide a monitoring framework for tracking flood pulse change and detecting biotic responses.
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Affiliation(s)
| | | | | | | | | | | | - Thiago B A Couto
- Florida International University Institute of Environment and a member of the Tropical Rivers Lab
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Brito-Santos JL, Dias-Silva K, Brasil LS, da Silva JB, Santos ADM, de Sousa LM, Vieira TB. Fishway in hydropower dams: a scientometric analysis. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:752. [PMID: 34709469 DOI: 10.1007/s10661-021-09360-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 07/30/2021] [Indexed: 06/13/2023]
Abstract
Building dams for hydroelectric use causes several negative effects on the aquatic fauna with special attention to fish communities. In fact, among other impacts, dams act as a barrier for migratory fish, causing discontinuities in rivers and not allowing fish to move to the headwaters to breed and back to the lower portions of rivers, to grow. For more than 300 years, fishways have been used to minimize the impact of dams. Here, we assess the worldwide knowledge about fishways, identifying the temporal and spatial pattern and the situation of Brazil in this global pattern. For this, we conducted scientometric research on the Web of Science repository with the following words: weir, fish, facilities, ladder, pass, dam, fish ladder, fish pass, fishway, hydropower, Petromyzon, and salmon between 1985 and 2019. Initially, we obtained 1282 articles. After a selection, 324 articles aimed to describe fishway efficiency and the relationship with the fish fauna remained. Most of the articles on dams, fishways, and fish are from North America and Europe. Among the articles in South America, most are from Brazil. Nonetheless, information on the topic is incipient in Brazil, since the country has one of the biggest hydropower in the world and 42 scientific articles about fishways published in the international scientific database. Ecology is the area of knowledge with most articles, with continuous growth in the last 10 years. Studies in the field of ecology are strategical, as this field can integrate different areas of knowledge to test the efficiency of fishways in fish conservation and may be able to answer the question: "Are fishways an ecological trap?" Research focusing on this question is important to understand the efficiency of fishways to better evaluate solutions to minimize the negative effects of dams on fish and increase the effectiveness of fishways.
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Affiliation(s)
- Jhonnes Luciano Brito-Santos
- Programa de Pós-Graduação em Biodiversidade e Conservação - PPGBC, Universidade Federal do Pará (UFPA), Campus Altamira, Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, 68372-040, Brazil
| | - Karina Dias-Silva
- Programa de Pós-Graduação em Biodiversidade e Conservação - PPGBC, Universidade Federal do Pará (UFPA), Campus Altamira, Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, 68372-040, Brazil
| | - Leandro Schlemmer Brasil
- Programa de Pós-Graduação em Zoologia, Universidade Federal do Pará (UFPA), Campus Guamá, Av. Perimetral, no. 1901, Terra Firme, Belém , Pará, 66017-970, Brazil
| | - Jennifer Bandeira da Silva
- Programa de Pós-Graduação em Biodiversidade e Conservação - PPGBC, Universidade Federal do Pará (UFPA), Campus Altamira, Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, 68372-040, Brazil
| | - Alana de Moura Santos
- Faculdade de Engenharia Florestal - FAV, Universidade Federal do Pará (UFPA), Campus Altamira. Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, 68372-040, Brazil
| | - Leandro Melo de Sousa
- Programa de Pós-Graduação em Biodiversidade e Conservação - PPGBC, Universidade Federal do Pará (UFPA), Campus Altamira, Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, 68372-040, Brazil
- Programa de Pós-Graduação em Zoologia, Universidade Federal do Pará (UFPA), Campus Guamá, Av. Perimetral, no. 1901, Terra Firme, Belém , Pará, 66017-970, Brazil
| | - Thiago Bernardi Vieira
- Programa de Pós-Graduação em Biodiversidade e Conservação - PPGBC, Universidade Federal do Pará (UFPA), Campus Altamira, Rua Coronel José Porfírio 2515, São Sebastião, Altamira, PA, 68372-040, Brazil.
- Programa de Pós-Graduação em Zoologia, Universidade Federal do Pará (UFPA), Campus Guamá, Av. Perimetral, no. 1901, Terra Firme, Belém , Pará, 66017-970, Brazil.
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Siqueira-Souza FK, Hurd LE, Yamamoto KC, Soares MGM, Cooper GJ, Kahn JR, Freitas CEC. Patterns of Pelagic Fish Diversity in Floodplain Lakes of Whitewater and Blackwater Drainage Systems Within the Central Amazon River Basin of Brazil. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.602895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The Amazon River Basin, one of the world’s most threatened ecosystems, has an enormous diversity of fish species, a result of temporally and spatially complex habitat containing biogeochemically different river systems. The annual hydrologic cycle results in floodplain lakes during low water and inundates forests during high water, exposing fish to different resources and environmental conditions. The two principal river systems in the central Brazilian Amazon are blackwater, with nutrient-poor acidic water, and nutrient-rich whitewater. Although species-rich, the Amazon Basin is data-poor in terms of comparative studies on a regional scale. We analyzed data sets from independent sampling studies of pelagic fish in 16 floodplain lakes, nine whitewater (Rio Solimões) and seven blackwater (Rio Negro), in the central Amazon Basin of Brazil. Our findings suggest striking similarities in pelagic fish diversity patterns. Species richness was virtually equal (165 in whitewater and 168 in blackwater). Both species richness, and number of migratory species, per lake increased toward the confluence of the rivers in both systems in our study. The proportion of unique species was also similar in whitewater lakes and blackwater (41 and 43%, respectively), boosting total regional richness to 237 species. However, species composition in whitewater lakes was more homogenous (lower β diversity), and species composition was associated with conductivity and pH in whitewater, but with dissolved oxygen and transparency in blackwater. Therefore, regional fish diversity cannot be represented by sampling one lake or even one drainage system, but must include multiple lakes from both systems. These two systems may differ in sensitivity to anthropogenic stressors such as damming and deforestation.
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Mosquera-Guerra F, Trujillo F, Oliveira-da-Costa M, Marmontel M, Van Damme PA, Franco N, Córdova L, Campbell E, Alfaro-Shigueto J, Mena JL, Mangel JC, Oviedo JSU, Carvajal-Castro JD, Mantilla-Meluk H, Armenteras-Pascual D. Home range and movements of Amazon river dolphins Inia geoffrensis in the Amazon and Orinoco river basins. ENDANGER SPECIES RES 2021. [DOI: 10.3354/esr01133] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Studying the variables that describe the spatial ecology of threatened species allows us to identify and prioritize areas that are critical for species conservation. To estimate the home range and core area of the Endangered (EN) Amazon river dolphin Inia geoffrensis, 23 individuals (6♀, 17♂) were tagged during the rising water period in the Amazon and Orinoco river basins between 2017 and 2018. The satellite tracking period ranged from 24 to 336 d (mean ± SE = 107 ± 15.7 d), and river dolphin movements ranged from 7.5 to 298 km (58 ± 13.4 km). Kernel density estimates were used to determine minimum home ranges at 95% (K95 = 6.2 to 233.9 km2; mean = 59 ± 13.5 km2) and core areas at 50% (K50 = 0.6 to 54.9 km2; mean = 9 ± 2.6 km2). Protected areas accounted for 45% of the K50 estimated core area. We observed dolphin individuals crossing country borders between Colombia and Peru in the Amazon basin, and between Colombia and Venezuela in the Orinoco basin. Satellite tracking allowed us to determine the different uses of riverine habitat types: main rivers (channels and bays, 52% of recorded locations), confluences (32%), lagoons (9.6%), and tributaries (6.2%). Satellite monitoring allowed us to better understand the ecological preferences of the species and demonstrated the importance of maintaining aquatic landscape heterogeneity and spatial connectivity for effective river dolphin conservation.
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Affiliation(s)
- F Mosquera-Guerra
- Fundación Omacha, 111211 Bogotá, D.C., Colombia
- Grupo de Ecología del Paisaje y Modelación de Ecosistemas-ECOLMOD, Departamento de Biología, Universidad Nacional de Colombia, 111321 Bogotá, D.C., Colombia
| | - F Trujillo
- Fundación Omacha, 111211 Bogotá, D.C., Colombia
| | - M Oliveira-da-Costa
- World Wildlife Fund (WWF) - Brazil, Colombia, and Peru, Rue Mauverney 28, 1196 Gland, Switzerland
| | - M Marmontel
- Instituto de Desenvolvimento Sustentável Mamirauá, 69.553-225 Tefé (AM), Brazil
| | | | - N Franco
- Fundación Omacha, 111211 Bogotá, D.C., Colombia
| | - L Córdova
- Faunagua, 31001 Sacaba-Cochabamba, Bolivia
| | - E Campbell
- ProDelphinus, 15074 Lima, Peru
- School of BioSciences, University of Exeter, Penryn, Cornwall TR10 9EZ, UK
- Carrera de Biología Marina, Universidad Cientifíca del Sur, 15067 Lima, Peru
| | - J Alfaro-Shigueto
- ProDelphinus, 15074 Lima, Peru
- School of BioSciences, University of Exeter, Penryn, Cornwall TR10 9EZ, UK
- Carrera de Biología Marina, Universidad Cientifíca del Sur, 15067 Lima, Peru
| | - JL Mena
- Museo de Historia Natural Vera Alleman Haeghebaert, Universidad Ricardo Palma, 1801 Lima, Peru
| | - JC Mangel
- ProDelphinus, 15074 Lima, Peru
- School of BioSciences, University of Exeter, Penryn, Cornwall TR10 9EZ, UK
- Carrera de Biología Marina, Universidad Cientifíca del Sur, 15067 Lima, Peru
| | - JSU Oviedo
- World Wildlife Fund (WWF) - Brazil, Colombia, and Peru, Rue Mauverney 28, 1196 Gland, Switzerland
| | - JD Carvajal-Castro
- Grupo de Investigación en Evolución, Ecología y Conservación (EECO), Programa de Biología, Universidad del Quindío, 630004 Armenia, Colombia
- Department of Biological Sciences, St. John’s University, 11366 Queens, NY, USA
| | - H Mantilla-Meluk
- Grupo de Investigación en Desarrollo y Estudio del Recurso Hídrico y el Ambiente (CIDERA), Programa de Biología, Universidad del Quindío, 630004 Armenia, Colombia
- Centro de Estudios de Alta Montaña, Universidad del Quindío, 630004 Armenia, Colombia
| | - D Armenteras-Pascual
- Grupo de Ecología del Paisaje y Modelación de Ecosistemas-ECOLMOD, Departamento de Biología, Universidad Nacional de Colombia, 111321 Bogotá, D.C., Colombia
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14
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Mariac C, Renno JF, Carmen Garcia-Davila, Vigouroux Y, Mejia E, Angulo C, Castro Ruiz D, Estivals G, Nolorbe C, García Vasquez A, Nuñez J, Cochonneau G, Flores M, Alvarado J, Vertiz J, Chota-Macuyama W, Sánchez H, Miranda G, Duponchelle F. Species-level ichthyoplankton dynamics for 97 fishes in two major river basins of the Amazon using quantitative metabarcoding. Mol Ecol 2021; 31:1627-1648. [PMID: 33949023 DOI: 10.1111/mec.15944] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 02/20/2021] [Accepted: 04/23/2021] [Indexed: 12/01/2022]
Abstract
The Amazon basin holds the world's largest freshwater fish diversity. Information on the intensity and timing of reproductive ecology of Amazonian fish is scant. We use a metabarcoding method by capture using a single probe to quantify species-level ichthyoplankton dynamics. We sampled the Marañón and the Ucayali rivers in Peru monthly for 2 years. We identified 97 species that spawned mainly during the flood start, the flood end or the receding periods, although some species had spawning activity in more than one period. This information was new for 40 of the species in the Amazon basin and 80 species in Peru. Most species ceased spawning for a month during a strong hydrological anomaly in January 2016, demonstrating the rapidity with which they react to environmental modifications during the breeding season. We also document another unreported event in the Amazon basin, the inverse phenology of species belonging to one genus (Triportheus). Overall larval flow in the Marañón was more than twice that of the Ucayali, including for most commercial species (between two and 20 times higher), whereas the Ucayali accounts for ~80% of the fisheries landings in the region. Our results are discussed in the light of the main anthropogenic threats to fishes, hydropower dam construction and the Hidrovía Amazónica, and should serve as a pre-impact baseline.
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Affiliation(s)
- Cédric Mariac
- DIADE, Univ Montpellier, CIRAD, IRD, Montpellier, France.,Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France
| | - Jean-François Renno
- DIADE, Univ Montpellier, CIRAD, IRD, Montpellier, France.,Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France
| | - Carmen Garcia-Davila
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Yves Vigouroux
- DIADE, Univ Montpellier, CIRAD, IRD, Montpellier, France.,Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France
| | - Eduardo Mejia
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Carlos Angulo
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Diana Castro Ruiz
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Guillain Estivals
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Christian Nolorbe
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Aurea García Vasquez
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Jesus Nuñez
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,BOREA, MNHN, SU, UA, CNRS, IRD, Université de Caen-Normandie, France
| | | | - Mayra Flores
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Jhon Alvarado
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - José Vertiz
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Werner Chota-Macuyama
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Homero Sánchez
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Laboratorio de Biología y Genética Molecular (LBGM), Instituto de Investigaciones de la Amazonía Peruana (IIAP), Iquitos, Perú
| | - Guido Miranda
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,Wildlife Conservation Society, Bolivia Program, La Paz, Bolivia.,Unidad de Limnología, Instituto de Ecología, Universidad Mayor de San Andrés, La Paz, Bolivia
| | - Fabrice Duponchelle
- Laboratoire Mixte International - Evolution et Domestication de l'Ichtyofaune Amazonienne (LMI - EDIA), IIAP, UAGRM, IRD, Montpellier, France.,MARBEC, CNRS, Ifremer, IRD, Univ Montpellier, Montpellier, France
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15
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Rauber RG, Strictar L, Gomes LC, Suzuki HI, Agostinho AA. Spatial segregation in the reproductive activity of Neotropical fish species as an indicator of the migratory trait. JOURNAL OF FISH BIOLOGY 2021; 98:694-706. [PMID: 33188525 DOI: 10.1111/jfb.14614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 11/07/2020] [Accepted: 11/11/2020] [Indexed: 06/11/2023]
Abstract
This study focused on the distribution of fish with high reproductive activity along a basin, using a 430 km stretch of the Cuiabá River in Brazil as a model. The main objective of this study was to identify those fish that migrate long distances for reproduction, among all the basin species. Thus, a set of working criteria are proposed to classify species according to their reproductive behaviour (i.e., reproductive activity and distribution). Samplings were performed in the Cuiabá River basin, encompassing several environments (river, channels and lakes) during the reproductive periods (between October and February), from 2000 to 2004. Species occurrence (presence and absence - proxy of distribution) across the basin and index of reproductive activity values were used as criteria to identify the species that perform long-distance longitudinal migrations for reproduction. The study confirmed the classification of long-distance longitudinal migration species; nonetheless, some species were not classified as described in the literature. The proposed sequential criteria have proven to be effective in the classification of long-distance longitudinal migrations species and certainly contribute to filling some existing knowledge gaps of reproductive traits. This classification is of fundamental importance in planning new dam projects, in decision making and in the development of management and conservation actions for the ichthyofauna.
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Affiliation(s)
- Rafaela G Rauber
- Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Departamento de Biologia, Universidade Estadual de Maringá, Maringá, Brazil
| | - Larissa Strictar
- Capes - Foundation, Ministry of Education of Brazil, Brasília, Brazil
| | - Luiz C Gomes
- Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Departamento de Biologia, Universidade Estadual de Maringá, Maringá, Brazil
- Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá, Maringá, Brazil
| | - Harumi I Suzuki
- Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), Universidade Estadual de Maringá, Maringá, Brazil
| | - Angelo A Agostinho
- Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Departamento de Biologia, Universidade Estadual de Maringá, Maringá, Brazil
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16
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Carvalho IFDS, Cantanhêde LG, Diniz ALC, Carvalho-Neta RNF, Almeida ZDSD. Reproductive biology of seven fish species of commercial interest at the Ramsar site in the Baixada Maranhense, Legal Amazon, Brazil. NEOTROPICAL ICHTHYOLOGY 2021. [DOI: 10.1590/1982-0224-2020-0067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract The purpose of this study is to determine the parameters of the reproductive biology of seven commercial species at the Ramsar Site of the Baixada Maranhense to support fisheries management measures. The collections were carried out between 2012 and 2016. The reproductive period, sex ratio, weight-length relationship and first sexual maturity were evaluated for seven species of commercial importance. The sex ratio showed that females are predominant for all species, except for Plagioscion squamossissimus. The weight-length relationship indicated a greater investment in weight for Cichla monoculus and Hassar affinis, and a greater investment in length for Hoplias malabaricus, Plagioscion squamosissimus, Prochilodus lacustris, Pygocentrus nattereri, and Schizodon dissimilis. The reproductive activity of the species was predominant in the rainy season, but C. monoculus, H. malabaricus and P. lacustris showed the ability to reproduce in both seasons. As management measures for the region, it is suggested a change in the closed fishing season established by IBAMA, from December 1 to April 30, to ensure the protection of all commercial species in this study.
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17
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Márquez-Velásquez V, Galdino Leite R, Hernandez-Serna A, Alvarado F. Larval diet of two Amazonian goliath catfish species. JOURNAL OF FISH BIOLOGY 2021; 98:333-336. [PMID: 32997350 DOI: 10.1111/jfb.14565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 09/02/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Analysis of feeding habits was performed for early life stages of Brachyplatystoma rousseauxii and Brachyplatystoma filamentosum in the Madeira River, Brazil. Stomach contents of B. rousseauxii and B. filamentosum were identified and analysed to provide the percentage of frequency of occurrence (%FO) and area (%A) and the alimentary index (IAi). The order Diptera represented the most important item consumed by both species. This is the first analyses of the trophic ecology of these ecologically and economically important species of the Amazonian region in early life stages.
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Affiliation(s)
- Viviana Márquez-Velásquez
- Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Universidade Federal da Paraíba, João Pessoa, Brazil
- Fundación Colombiana para la Investigación y Conservación de Tiburones y Rayas, SQUALUS, Cali, Colombia
- IRIS Research Group, Innovation for Resilience, Inclusion and Sustainability, Laboratory of Animal Ecology, Universidade Federal da Paraíba, Campus IV, Rio Tinto, Brazil
| | | | - Andres Hernandez-Serna
- Department of Geographical Sciences, University of Maryland, College Park, Maryland, USA
| | - Fredy Alvarado
- Departamento de Agricultura, Universidade Federal da Paraíba, Campus III, Bananeiras, Brazil
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18
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Formiga KM, Batista JDS, Alves-Gomes JA. The most important fishery resource in the Amazon, the migratory catfish Brachyplatystoma vaillantii (Siluriformes: Pimelodidae), is composed by an unique and genetically diverse population in the Solimões-Amazonas River System. NEOTROPICAL ICHTHYOLOGY 2021. [DOI: 10.1590/1982-0224-2020-0082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT The migratory catfish Brachyplatystoma vaillantii is one of the most important fishery resources in the Amazon. Intense capture occurs associated to its life cycle. In order to know the genetic status, we sequenced the mitochondrial DNA control region from 150 individuals of B. vaillantii, collected in five fishing landing locations, covering the length of the Solimões-Amazonas River in Brazil. Genetic diversity parameters suggest there is no genetic differentiation between the five localities. Population’s expansion indicated by R 2 and Fu’s Fs tests was also confirmed by the high number of unique haplotypes found. The Analyses of molecular variance indicated that nearly all variability was contained within locations (99.86%), and estimates of gene flow among B. vaillantii were high (F ST = 0.0014). These results suggest that Brachyplatystoma vaillantii forms a panmitic population along the Solimões-Amazonas River and, has greater genetic variability than other species of the Brachyplatystoma genus available so far. Although the influence of different tributaries on B. vaillantii migration patterns remains uncertain, a single population in the main channel should be consider in future policies for management of this resource. However, since the species’ life cycle uses habitats in several countries, its management and conservation depend greatly of internationally joined efforts.
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Affiliation(s)
- Kyara Martins Formiga
- Instituto Nacional de Pesquisas da Amazônia, Brazil; Instituto Nacional de Pesquisas da Amazônia, Brazil; Instituto Nacional de Pesquisas da Amazônia, Brazil
| | - Jacqueline da Silva Batista
- Instituto Nacional de Pesquisas da Amazônia, Brazil; Instituto Nacional de Pesquisas da Amazônia, Brazil; Instituto Nacional de Pesquisas da Amazônia, Brazil
| | - José Antônio Alves-Gomes
- Instituto Nacional de Pesquisas da Amazônia, Brazil; Instituto Nacional de Pesquisas da Amazônia, Brazil; Instituto Nacional de Pesquisas da Amazônia, Brazil
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19
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Miranda-Chumacero G, Mariac C, Duponchelle F, Painter L, Wallace R, Cochonneau G, Molina-Rodriguez J, Garcia-Davila C, Renno JF. Threatened fish spawning area revealed by specific metabarcoding identification of eggs and larvae in the Beni River, upper Amazon. Glob Ecol Conserv 2020. [DOI: 10.1016/j.gecco.2020.e01309] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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20
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Growing diversity supports radiation of an Ellipsomyxa lineage into the Amazon freshwater: Description of two novel species parasitizing fish from Tapajós and Amazon rivers. Acta Trop 2020; 211:105616. [PMID: 32621932 DOI: 10.1016/j.actatropica.2020.105616] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 05/08/2020] [Accepted: 06/30/2020] [Indexed: 11/21/2022]
Abstract
Species of the genus Ellipsomyxa Køie, 2003, parasitize mostly marine and brackish fish around the world. In the present study, we describe two novel species of Ellipsomyxa: Ellipsomyxa plagioscioni n. sp. parasitizing the gall bladder of Plagioscion squamosissimus (Sciaenidae), a freshwater fish but commonly found in brackish water in the Amazonian estuarine environment; and Ellipsomyxa paraensis n. sp. infecting Cichla monoculus (Cichlidae), a strictly freshwater fish. The host specimens were caught from the Amazon and Tapajós rivers, in the municipal region of Santarém, in the State of Pará, Brazil. The study was performed using a combination of morphological, biological, and SSU rDNA-based phylogeny, which suggested that marine transgressions of the Miocene epoch, in the central region of South America, were a pathway for the adaptation and radiation of these cnidarian parasites in the freshwater environment. Both disporic plasmodia and mature myxospores were found floating freely in the bile. Mature myxospores from both species were ellipsoidal in the valvular and sutural views, with thin smooth valves elongated in the direction perpendicular to the plane of the transverse sutural line. Ellipsomyxa plagioscioni n. sp. myxospores measured 11.1 (10.2-12.8) µm in length and 6.6 (5.6-7.6) µm in width. Two pyriform polar capsules discharging on opposite sides, some distance from both the sutural line and the spore ends, measured 3.8 (3.2-4.4) µm in length and 2.8 (2.3-3.3) µm in width, with 5-6 coil polar tubules. Ellipsomyxa paraensis n. sp. myxospores measured 11.5 (10.5-12.4) µm in length and 7.5 (6.6-8.6) µm in width. Two pyriform polar capsules which discharged on opposite sides some distance from both the sutural line and spore ends, measured 3.2 (2.1-3.9) µm in length and 2.6 (2.0-3.3) µm in width, with 2-3 coil polar tubules. Valvular protrusions were observed, associated with the tips of the polar capsules. Molecular analysis based on the SSU rDNA sequences indicated that the two novel Ellipsomyxa species were distinct from all other sequences deposited in the GenBank database. The phylogenetic trees clustered E. plagioscioni n. sp. as a basal species of a lineage of the marine/estuarine Ellipsomyxa, while E. paraensis n. sp. clustered together with other Amazonian species.
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21
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Pachla LA, Hartmann PB, Massaro MV, Bastian R, Pelicice FM, Reynalte-Tataje DA. First record of the mating behaviour of the spotted surubim Pseudoplatystoma corruscans in the Uruguay River. JOURNAL OF FISH BIOLOGY 2020; 97:1233-1237. [PMID: 32654142 DOI: 10.1111/jfb.14459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 07/03/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
The spotted surubim Pseudoplatystoma corruscans is a large migratory catfish native to the La Plata and San Francisco basins. Nonetheless, its reproductive dynamics and behaviour remain poorly understood. This brief note provides the first record of the mating behaviour of P. corruscans in natural conditions. This behaviour was observed in the main channel of the Middle Uruguay River (Brazil). A school of approximately 25 fish, 5 females (with protruding abdomen and larger body size) and 20 males, were followed and videotaped. The largest female led the school, followed by other fish. Some males disputed repeatedly the posterior region of the females, whereas other males continuously repelled them. Eventually, some males, apparently exhausted, floated belly up. During this event, males were in a state of pronounced agitation, and some had abrasions in the head. Polygamy characterized the mating behaviour of P. corruscans.
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Affiliation(s)
- Lucas A Pachla
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Cerro Largo, Brazil
| | - Paula B Hartmann
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Cerro Largo, Brazil
| | - Marthoni V Massaro
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Cerro Largo, Brazil
| | - Rodrigo Bastian
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Cerro Largo, Brazil
| | - Fernando M Pelicice
- Núcleo de Estudos Ambientais (Neamb), Federal University of Tocantins, Porto Nacional, Brazil
| | - David A Reynalte-Tataje
- Postgraduate Program of Environment and Sustainable Technologies, Federal University of Fronteira Sul, Cerro Largo, Brazil
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22
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Santos RE, Pinto-Coelho RM, Drumond MA, Fonseca R, Zanchi FB. Damming Amazon Rivers: Environmental impacts of hydroelectric dams on Brazil's Madeira River according to local fishers' perception. AMBIO 2020; 49:1612-1628. [PMID: 31994028 PMCID: PMC7413977 DOI: 10.1007/s13280-020-01316-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 08/25/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
This study aimed to investigate the environmental impacts generated by the hydroelectric complex in the Madeira River, Brazilian Amazon, based on the perceptions of local fishers and fishery database, it focus attention on three main impacts: (i) on local fishery stocks; (ii) in fish fauna and (iii) on the aquatic ecosystems. The local fishers were selected through the "snowball" approach for the application of semi-structured interviews. All the local fishers confirmed having perceived a decline in fishery productivity following the impounding of the Madeira River. Changes in the condition of the fish were also perceived by the local fishers, including exophthalmia (82%), a reduction in the weight or length of the fish (25%), and irregular breeding patterns (14%). In the case of impacts on the river, changes in the hydrological cycle were the process remembered most frequently (75%). The results elucidated a range of environmental impacts caused by the hydroelectric dams of the Madeira River.
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Affiliation(s)
- Rangel Eduardo Santos
- Programa de Pós-Graduação em Ecologia, Conservação e Manejo de Vida Silvestre, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, Bairro Pampulha, Belo Horizonte, MG 31270-901 Brazil
| | - Ricardo Motta Pinto-Coelho
- Programa de Pós-Graduação em Geografia, Universidade Federal de São João del-Rei, Praça Frei Orlando, 170, Centro, São João del-Rei, MG 36307-352 Brazil
| | - Maria Auxiliadora Drumond
- Programa de Pós-Graduação em Ecologia, Conservação e Manejo de Vida Silvestre, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, Bairro Pampulha, Belo Horizonte, MG 31270-901 Brazil
| | - Rogério Fonseca
- Curso de Engenharia Florestal, Faculdade de Ciências Agrárias, Universidade Federal do Amazonas, Av. Rodrigo Otávio, 6200 - Setor Sul, Coroado, Manaus, AM 69080-900 Brazil
| | - Fabrício Berton Zanchi
- Universidade Federal do Sul da Bahia (UFSB), Rodovia Porto Seguro, BR367- Km10, Porto Seguro, BA 45613-204 Brazil
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23
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Encalada AC, Flecker AS, Poff NL, Suárez E, Herrera-R GA, Ríos-Touma B, Jumani S, Larson EI, Anderson EP. A global perspective on tropical montane rivers. Science 2020; 365:1124-1129. [PMID: 31515386 DOI: 10.1126/science.aax1682] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Tropical montane rivers (TMR) are born in tropical mountains, descend through montane forests, and feed major rivers, floodplains, and oceans. They are characterized by rapid temperature clines and varied flow disturbance regimes, both of which promote habitat heterogeneity, high biological diversity and endemism, and distinct organisms' life-history adaptations. Production, transport, and processing of sediments, nutrients, and carbon are key ecosystem processes connecting high-elevation streams with lowland floodplains, in turn influencing soil fertility and biotic productivity downstream. TMR provide key ecosystem services to hundreds of millions of people in tropical nations. In light of existing human-induced disturbances, including climate change, TMR can be used as natural model systems to examine the effects of rapid changes in abiotic drivers and their influence on biodiversity and ecosystem function.
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Affiliation(s)
- Andrea C Encalada
- Instituto BIOSFERA, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador.
| | - Alexander S Flecker
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA
| | - N LeRoy Poff
- Department of Biology, Colorado State University, Fort Collins, CO, USA.,Institute for Applied Ecology, University of Canberra, Canberra, ACT, Australia
| | - Esteban Suárez
- Instituto BIOSFERA, Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Quito, Ecuador
| | - Guido A Herrera-R
- Department of Earth and Environment and Institute for Water and Environment, Florida International University, Miami, FL, USA
| | - Blanca Ríos-Touma
- Facultad de Ingenierías y Ciencias Aplicadas, Ingeniería Ambiental, Grupo de Investigación en Biodiversidad, Medio Ambiente y Salud (BIOMAS), Universidad de las Américas, Quito, Ecuador
| | - Suman Jumani
- Soil and Water Sciences Department, University of Florida, Gainesville, FL, USA
| | - Erin I Larson
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA.,Department of Environmental Science, Alaska Pacific University, Anchorage, AK, USA
| | - Elizabeth P Anderson
- Department of Earth and Environment and Institute for Water and Environment, Florida International University, Miami, FL, USA
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24
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Castro RMC, Polaz CNM. Small-sized fish: the largest and most threatened portion of the megadiverse neotropical freshwater fish fauna. BIOTA NEOTROPICA 2020. [DOI: 10.1590/1676-0611-bn-2018-0683] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract: We introduce the work providing a synthetic description of the diversity and phyletic structure of freshwater fish in the Neotropical Region, especially emphasizing that of Brazil. This is accompanied by a discussion about environments of fish from small to medium sized to large, taking into account how it shaped their respective biologies/ecologies, as well as what they imply for their use by humans. We present, as figures, the results of our exploratory analysis of Brazilian Red Book of Threatened Species of Fauna (2018), focusing on the small-sized ones, with up to 15 cm of standard length. We continue to present the main human impacts in small fish environments, along with those suffered by medium to large fish environments, and then follow by their respective deleterious effects. Finally, we present a general synthesis, reinforcing the enormous importance of small fish conservation and their respective preferred environments, followed by our main conclusions, and possible conservation strategies.
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25
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Lennox RJ, Paukert CP, Aarestrup K, Auger-Méthé M, Baumgartner L, Birnie-Gauvin K, Bøe K, Brink K, Brownscombe JW, Chen Y, Davidsen JG, Eliason EJ, Filous A, Gillanders BM, Helland IP, Horodysky AZ, Januchowski-Hartley SR, Lowerre-Barbieri SK, Lucas MC, Martins EG, Murchie KJ, Pompeu PS, Power M, Raghavan R, Rahel FJ, Secor D, Thiem JD, Thorstad EB, Ueda H, Whoriskey FG, Cooke SJ. One Hundred Pressing Questions on the Future of Global Fish Migration Science, Conservation, and Policy. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00286] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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26
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Hahn L, Silva PC, Malabarba MC, Malabarba LR, Câmara LFD, Nunes LD, Machado LS, Martins EG, Barthem RB. Genetics and telemetry indicate unexpected movements among structured populations for Brachyplatystoma platynemum in the Amazon. JOURNAL OF FISH BIOLOGY 2019; 95:633-637. [PMID: 30963582 DOI: 10.1111/jfb.13978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 04/08/2019] [Indexed: 06/09/2023]
Abstract
The genetic analysis of Brachyplatystoma platynemum individuals sampled from the lower Madeira River reinforces the existence of two structured populations in the Amazon Basin (Madeira and Amazon populations). However, the recapture of an individual from the Amazon population in the Solimões River, which was telemetry-tagged in the Madeira River after the damming, indicates that fish from the Amazon population move between the two river systems. This has not yet been observed, however, in the Madeira River population, which is currently divided and isolated in the lower and upper Madeira River by the construction of two dams.
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Affiliation(s)
- Lisiane Hahn
- Divisão de Pesquisas, Neotropical Consultoria Ambiental, Rua Cesário Rosseto, Passo Fundo, Brazil
| | - Priscilla C Silva
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Biologia Animal, Porto Alegre, Brazil
- Departamento de Biologia Animal, Universidade Federal de Viçosa, Programa de Pós-Graduação em Biologia Animal, Viçosa, Brazil
| | - Maria C Malabarba
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Biologia Animal, Porto Alegre, Brazil
| | - Luiz R Malabarba
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Biologia Animal, Porto Alegre, Brazil
| | - Luís F Da Câmara
- Divisão de Pesquisas, Neotropical Consultoria Ambiental, Rua Cesário Rosseto, Passo Fundo, Brazil
| | - Leonardo D Nunes
- Divisão de Pesquisas, Neotropical Consultoria Ambiental, Rua Cesário Rosseto, Passo Fundo, Brazil
| | - Leonardo S Machado
- Divisão de Pesquisas, Neotropical Consultoria Ambiental, Rua Cesário Rosseto, Passo Fundo, Brazil
| | - Eduardo G Martins
- Ecosystem Science and Management Program, University of Northern British Columbia (UNBC), Prince George, Canada
| | - Ronaldo B Barthem
- Departamento de Zoologia/Ictiologia, Museu Paraense Emilio Goeldi, Belém, Brazil
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27
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Tamario C, Sunde J, Petersson E, Tibblin P, Forsman A. Ecological and Evolutionary Consequences of Environmental Change and Management Actions for Migrating Fish. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00271] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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28
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Dagosta FC, Pinna MD. The Fishes of the Amazon: Distribution and Biogeographical Patterns, with a Comprehensive List of Species. BULLETIN OF THE AMERICAN MUSEUM OF NATURAL HISTORY 2019. [DOI: 10.1206/0003-0090.431.1.1] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Fernando C.P. Dagosta
- Universidade Federal da Grande Dourados Faculdade de Ciências Biológicas e Ambientais Dourados, Mato Grosso do Sul, Brazil
| | - Mário De Pinna
- Museu de Zoologia da Universidade de São Paulo São Paulo, Brazil
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29
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Hahn L, Martins EG, Nunes LD, da Câmara LF, Machado LS, Garrone-Neto D. Biotelemetry reveals migratory behaviour of large catfish in the Xingu River, Eastern Amazon. Sci Rep 2019; 9:8464. [PMID: 31186489 PMCID: PMC6560064 DOI: 10.1038/s41598-019-44869-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 05/24/2019] [Indexed: 11/11/2022] Open
Abstract
We used a combination of radio and acoustic telemetry to assess the movements of large catfish (Pimelodidae) in the Xingu River, a clearwater tributary of the Amazon River in Brazil. A total of 121 Phractocephalus hemioliopterus and 61 Pseudoplatystoma punctifer were tagged for monitoring within a 685 km segment, including the Belo Monte Hydroelectric Complex (BMHC), between February 2013 and July 2015. Long distance upstream movements were detected for P. hemioliopterus (up to 347 km) and for P. punctifer (up to 164 km) mainly during the transition between dry season and the rising water period. Both species moved through a long segment of rapids previously thought to function as barriers to migration. Several individuals exhibited long-distance bidirectional movements. Some tagged fish never left the release zone, indicating mortality, tag loss or resident individuals, which would characterize partial migration. The findings show evidence of migratory behaviour for large catfish within the Xingu River, emphasizing the influence of the hydrologic cycle on their movements. As part of the study area has become partially dewatered due to the BMHC, findings support the need of adequate management strategies to allow the movements of large catfish between spawning and feeding sites in the Xingu River.
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Affiliation(s)
- Lisiane Hahn
- Neotropical Consultoria Ambiental, Rua Cesário Rossetto, 182, Passo Fundo, RS, 99074-210, Brazil.
| | - Eduardo G Martins
- University of Northern British Columbia (UNBC), Ecosystem Science and Management Program, 3333 University Way, Prince George, BC, V2N 4Z9, Canada
| | - Leonardo D Nunes
- Neotropical Consultoria Ambiental, Rua Cesário Rossetto, 182, Passo Fundo, RS, 99074-210, Brazil
| | - Luís Fernando da Câmara
- Neotropical Consultoria Ambiental, Rua Cesário Rossetto, 182, Passo Fundo, RS, 99074-210, Brazil
| | - Leonardo S Machado
- Neotropical Consultoria Ambiental, Rua Cesário Rossetto, 182, Passo Fundo, RS, 99074-210, Brazil
| | - Domingos Garrone-Neto
- UNESP - Univ Estadual Paulista, Campus Experimental de Registro, Avenida Nelson Brihi Badur, 430, Registro, SP, 11900-000, Brazil
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30
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Damme PAV, Córdova-Clavijo L, Baigún C, Hauser M, Doria CRDC, Duponchelle F. Upstream dam impacts on gilded catfish Brachyplatystoma rousseauxii (Siluriformes: Pimelodidae) in the Bolivian Amazon. NEOTROPICAL ICHTHYOLOGY 2019. [DOI: 10.1590/1982-0224-20190118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT This paper explores the effects of two run-of-river dams (Jirau and Santo Antônio) built in cascade in the middle Madeira River (Brazil) on the interruption of long-distance migration routes of the gilded catfish (Brachyplatystoma rousseauxii). A participative monitoring system was set up to compare capture by commercial fishers approximately 1500 km upstream of the dams in Bolivia, before (1998-2007) and after (2015-2017) dam closure. A significant decrease in gilded catfish catches and in catch per unit effort was observed after dam closure, whereas no significant difference in mean weight was found. Back-estimation of age suggests that the few individuals remaining after dam closure in 2009 are a mixture of old homers that returned upstream before dam closure, and residents hatched after dam closure and trapped in the upper Madeira. Unless fishways in the Madeira River dams improve their efficiency, the gilded catfish might become rare and in danger of regional extinction in the upper Madeira basin in the next few years, negatively affecting river fisheries.
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Affiliation(s)
- Paul A. Van Damme
- Instituto de Investigación Aplicada de Recursos Acuáticos, Bolivia; Universidad Mayor de San Simón, Bolivia
| | | | | | | | | | - Fabrice Duponchelle
- Universidade Federal de Rondônia, Brazil; Institut de Recherche pour le Développement, France
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31
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Massaro MV, Pachla LA, Bastian R, Pelicice FM, Reynalte-Tataje DA. Seasonal and longitudinal variation in fish assemblage structure along an unregulated stretch of the Middle Uruguay River. NEOTROPICAL ICHTHYOLOGY 2019. [DOI: 10.1590/1982-0224-20190043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT Diversity patterns and their causes remain important questions, especially for ecosystems that preserve natural conditions. This is the case of fish diversity in large Neotropical rivers. In this context, we investigated fish diversity patterns along an extensive unregulated river section (ca. 450 km) in the Middle Uruguay River Basin. Sampling was conducted seasonally between May 2017 and March 2018, at six sites (patches) with contrasting environmental conditions. We collected 3,008 individuals belonging to 90 species. Nine were migratory, which summed relevant biomass in local assemblages (20 to 60%). We observed spatial variation in assemblage structure, but weak seasonal effects. Overall, biomass was similar among sites, but richness tended to increase downstream. Migratory fishes showed opposed trends, with higher richness and biomass upstream, particularly catfishes (Siluriformes). Ordination analyses separated sites in three groups based on variations in composition and abundance, and revealed associations between these groups and specific hydro-geomorphic conditions (i.e., flow, depth, channel width and the presence of riparian vegetation). Our study revealed that fish diversity distributes heterogeneously along the main channel, where hydro-geomorphic patches select for distinct assemblages along riverine gradients.
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32
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Zatti SA, Atkinson SD, Maia AA, Corrêa LL, Bartholomew JL, Adriano EA. Novel Myxobolus and Ellipsomyxa species (Cnidaria: Myxozoa) parasiting Brachyplatystoma rousseauxii (Siluriformes: Pimelodidae) in the Amazon basin, Brazil. Parasitol Int 2018; 67:612-621. [DOI: 10.1016/j.parint.2018.06.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 06/04/2018] [Accepted: 06/12/2018] [Indexed: 01/12/2023]
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33
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Hauser M, Doria CRC, Melo LRC, Santos AR, Ayala DM, Nogueira LD, Amadio S, Fabré N, Torrente-Vilara G, García-Vásquez Á, Renno JF, Carvajal-Vallejos FM, Alonso JC, Nuñez J, Duponchelle F. Age and growth of the Amazonian migratory catfish Brachyplatystoma rousseauxii in the Madeira River basin before the construction of dams. NEOTROPICAL ICHTHYOLOGY 2018. [DOI: 10.1590/1982-0224-20170130] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT The goliath catfish Brachyplatystoma rousseauxii has crucial economical and ecological functions in the Amazon basin. Although its life history characteristics have been studied in the Amazon, there is little information in the Madeira River basin, which holds genetically distinct populations and where dams were recently built. Using fish collected in Bolivia, Brazil and Peru, this study provides a validation of growth rings deposition and details the growth patterns of B. rousseauxii in the Madeira before the dams’ construction. Age structure and growth parameters were determined from 497 otolith readings. The species exhibits two growth rings per year and sampled fish were between 0 and 16 years old. In the Brazilian portion of the basin, mainly young individuals below 5 years old were found, whereas older fish (> 5 years) were caught only in the Bolivian and Peruvian stretches, indicating that after migrating upstream to reproduce, adults remain in the headwaters of the Madeira River. Comparing with previous publications, B. rousseauxii had a slower growth and 20 cm lower maximum standard length in the Madeira River than in the Amazon River. This study provides a baseline for future evaluation of changes in population dynamics of the species following dams closure.
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Affiliation(s)
- Marília Hauser
- Universidade Federal de Rondônia, Brazil; Rede de Biodiversidade e Biotecnologia da Amazônia Legal, Brazil; Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France
| | | | | | | | | | | | | | | | | | - Áurea García-Vásquez
- Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France; Instituto de Investigaciones de la Amazonia Peruana, Peru
| | - Jean-François Renno
- Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France; Institut de Recherche pour le Développement, France
| | | | - Juan C. Alonso
- Instituto Amazónico de Investigaciones Científicas (SINCHI), Colombia
| | - Jésus Nuñez
- Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France; Institut de Recherche pour le Développement, France
| | - Fabrice Duponchelle
- Laboratoire Mixte International - Evolution et Domestication de l’Ichtyofaune Amazonienne, France; Institut de Recherche pour le Développement, France
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Ceratomyxa gracillima n. sp. (Cnidaria: Myxosporea) provides evidence of panmixia and ceratomyxid radiation in the Amazon basin. Parasitology 2018; 145:1137-1146. [DOI: 10.1017/s0031182017002323] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
AbstractWe describe a new freshwater myxosporean species Ceratomyxa gracillima n. sp. from the gall bladder of the Amazonian catfish Brachyplatystoma rousseauxii; the first myxozoan recorded in this host. The new Ceratomyxa was described on the basis of its host, myxospore morphometry, ssrDNA and internal transcribed spacer region (ITS-1) sequences. Infected fish were sampled from geographically distant localities: the Tapajós River, Pará State, the Amazon River, Amapá State and the Solimões River, Amazonas State. Immature and mature plasmodia were slender, tapered at both ends, and exhibited vermiform motility. The ribosomal sequences from parasite isolates from the three localities were identical, and distinct from all other Ceratomyxa sequences. No population-level genetic variation was observed, even in the typically more variable ITS-1 region. This absence of genetic variation in widely separated parasite samples suggests high gene flow as a result of panmixia in the parasite populations. Maximum likelihood and maximum parsimony analyses placed C. gracillima n. sp. sister to Ceratomyxa vermiformis in a subclade together with Ceratomyxa brasiliensis and Ceratomyxa amazonensis, all of which have Amazonian hosts. This subclade, together with other Ceratomyxa from freshwater hosts, formed an apparently early diverging lineage. The Amazonian freshwater Ceratomyxa species may represent a radiation that originated during marine incursions into the Amazon basin that introduced an ancestral lineage in the late Oligocene or early Miocene.
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Anderson EP, Jenkins CN, Heilpern S, Maldonado-Ocampo JA, Carvajal-Vallejos FM, Encalada AC, Rivadeneira JF, Hidalgo M, Cañas CM, Ortega H, Salcedo N, Maldonado M, Tedesco PA. Fragmentation of Andes-to-Amazon connectivity by hydropower dams. SCIENCE ADVANCES 2018; 4:eaao1642. [PMID: 29399629 PMCID: PMC5792221 DOI: 10.1126/sciadv.aao1642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 01/05/2018] [Indexed: 05/10/2023]
Abstract
Andes-to-Amazon river connectivity controls numerous natural and human systems in the greater Amazon. However, it is being rapidly altered by a wave of new hydropower development, the impacts of which have been previously underestimated. We document 142 dams existing or under construction and 160 proposed dams for rivers draining the Andean headwaters of the Amazon. Existing dams have fragmented the tributary networks of six of eight major Andean Amazon river basins. Proposed dams could result in significant losses in river connectivity in river mainstems of five of eight major systems-the Napo, Marañón, Ucayali, Beni, and Mamoré. With a newly reported 671 freshwater fish species inhabiting the Andean headwaters of the Amazon (>500 m), dams threaten previously unrecognized biodiversity, particularly among endemic and migratory species. Because Andean rivers contribute most of the sediment in the mainstem Amazon, losses in river connectivity translate to drastic alteration of river channel and floodplain geomorphology and associated ecosystem services.
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Affiliation(s)
- Elizabeth P. Anderson
- Department of Earth and Environment and Institute for Water and Environment, Florida International University, Miami, FL 33199, USA
- Corresponding author.
| | - Clinton N. Jenkins
- IPÊ—Instituto de Pesquisas Ecológicas, Nazaré Paulista, São Paulo 12960, Brazil
- SavingSpecies Inc., Holly Springs, NC 27540, USA
- Nicholas School of the Environment, Duke University, Durham, NC 27708, USA
| | - Sebastian Heilpern
- Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY 10027, USA
| | - Javier A. Maldonado-Ocampo
- Unidad de Ecología y Sistemática (UNESIS), Laboratorio de Ictiología, Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, Colombia
| | | | - Andrea C. Encalada
- Instituto BIOSFERA, Laboratorio de Ecología Acuática, Universidad San Francisco de Quito, Quito, Ecuador
- IMAR/MARE, Department of Life Sciences, University of Coimbra, 3001-456 Coimbra, Portugal
| | | | - Max Hidalgo
- Departamento de Ictiología, Museo de Historia Natural–Universidad Nacional Mayor San Marcos, Lima, Peru
| | - Carlos M. Cañas
- Wildlife Conservation Society, Av. Roosevelt 6360, Miraflores, Lima, Peru
| | - Hernan Ortega
- Departamento de Ictiología, Museo de Historia Natural–Universidad Nacional Mayor San Marcos, Lima, Peru
| | - Norma Salcedo
- Departamento de Ictiología, Museo de Historia Natural–Universidad Nacional Mayor San Marcos, Lima, Peru
- Department of Biology, Francis Marion University, Florence, SC 29506, USA
| | - Mabel Maldonado
- Unidad de Limnología y Recursos Acuáticos, Universidad Mayor de San Simón, Cochabamba, Bolivia
| | - Pablo A. Tedesco
- UMR5174 EDB (Laboratoire Evolution et Diversité Biologique), CNRS, IRD, UPS, ENSFEA, Université Paul Sabatier, F-31062 Toulouse, France
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