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Aguilera G, Terán GE, Mirande JM, Alonso F, Chumacero GM, Cardoso Y, Bogan S, Faustino-Fuster DR. An integrative approach method reveals the presence of a previously unreported species of Imparfinis Eigenmann and Norris 1900 (Siluriformes: Heptapteridae) in Argentina. JOURNAL OF FISH BIOLOGY 2022; 101:1248-1261. [PMID: 36097655 DOI: 10.1111/jfb.15197] [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: 03/25/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
Specimens of Imparfinis were recently collected in north-western Argentina from the Bermejo River basin (Salta and Jujuy Provinces), del Valle River (Salta Province) and Horcones River (Santiago del Estero Province). An integrative approach to taxonomy, combining a detailed morphological study and molecular phylogenetic analyses, was applied to determine the species identity of these specimens. A principal components analysis of morphological data clustered the specimens from north-western Argentina and from the Amazon basin, indicating a close morphological resemblance. Also, a molecular phylogenetic analysis showed populations of I. guttatus from Argentina and Peru forming a clade. According to the conducted haplotype network analysis these populations are distinct in two mutations. Thus, in the absence of morphological or molecular data indicating the contrary, the combined method supports the identity of the specimens from the tributaries of the Paraguay River in Argentina as I. guttatus, whose type locality is in the upper Beni River basin in Bolivia. This contribution is also the first record for this species from Argentina. The disjunct distribution of I. guttatus provides new evidence reinforcing the hypothesis for the origin of the Paraguayan ichthyofauna. We also provide an approach to the phylogenetic relationships of Imparfinis in Heptapteridae.
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Affiliation(s)
- Gastón Aguilera
- Fundación Miguel Lillo, Unidad Ejecutora Lillo, National Scientific and Technical Research Council (CONICET), Tucumán, Argentina
| | - Guillermo E Terán
- Fundación Miguel Lillo, Unidad Ejecutora Lillo, National Scientific and Technical Research Council (CONICET), Tucumán, Argentina
| | - Juan Marcos Mirande
- Fundación Miguel Lillo, Unidad Ejecutora Lillo, National Scientific and Technical Research Council (CONICET), Tucumán, Argentina
| | - Felipe Alonso
- Instituto de Bio y Geociencias del NOA (IBIGEO), National Scientific and Technical Research Council (CONICET), Salta, Argentina
| | | | - Yamila Cardoso
- Laboratorio de Sistemática y Biología Evolutiva, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Buenos Aires, Argentina
| | - Sergio Bogan
- Fundación de Historia Natural "Félix de Azara", Departamento de Ciencias Naturales y Antropología, Universidad Maimónides, Buenos Aires, Argentina
| | - Dario R Faustino-Fuster
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Biologia Animal, Avenida Bento Gonçalves, PortoAlegre, Brazil
- Departamento de Ictiología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Lima, Peru
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Torres-Dowdall J, Rometsch SJ, Velasco JR, Aguilera G, Kautt AF, Goyenola G, Petry AC, Deprá GC, da Graça WJ, Meyer A. Genetic assimilation and the evolution of direction of genital asymmetry in anablepid fishes. Proc Biol Sci 2022; 289:20220266. [PMID: 35538779 PMCID: PMC9091857 DOI: 10.1098/rspb.2022.0266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Phylogenetic comparative studies suggest that the direction of deviation from bilateral symmetry (sidedness) might evolve through genetic assimilation; however, the changes in sidedness inheritance remain largely unknown. We investigated the evolution of genital asymmetry in fish of the family Anablepidae, in which males' intromittent organ (the gonopodium, a modified anal fin) bends asymmetrically to the left or the right. In most species, males show a 1 : 1 ratio of left-to-right-sided gonopodia. However, we found that in three species left-sided males are significantly more abundant than right-sided ones. We mapped sidedness onto a new molecular phylogeny, finding that this left-sided bias likely evolved independently three times. Our breeding experiment in a species with an excess of left-sided males showed that sires produced more left-sided offspring independently of their own sidedness. We propose that sidedness might be inherited as a threshold trait, with different thresholds across species. This resolves the apparent paradox that, while there is evidence for the evolution of sidedness, commonly there is a lack of support for its heritability and no response to artificial selection. Focusing on the heritability of the left : right ratio of offspring, rather than on individual sidedness, is key for understanding how the direction of asymmetry becomes genetically assimilated.
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Affiliation(s)
- Julián Torres-Dowdall
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Sina J. Rometsch
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Jacobo Reyes Velasco
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Gastón Aguilera
- Unidad Ejecutora Lillo (CONICET), Fundación Miguel Lillo, Tucumán, Argentina
| | - Andreas F. Kautt
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Guillermo Goyenola
- Departamento de Ecología y Gestión Ambiental, Centro Universitario Regional del Este, Universidad de la República, Uruguay
| | - Ana C. Petry
- Instituto de Biodiversidade e Sustentabilidade, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | - Gabriel C. Deprá
- Departamento de Biologia, Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Centro de Ciências Biológicas, Universidade Estadual de Maringá, Maringá, Brazil
| | - Weferson J. da Graça
- Departamento de Biologia, Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura, Centro de Ciências Biológicas, Universidade Estadual de Maringá, Maringá, Brazil
| | - Axel Meyer
- Department of Biology, Zoology and Evolutionary Biology, University of Konstanz, 78457 Konstanz, Germany
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Population diversification in the frog Mantidactylus bellyi on an isolated massif in northern Madagascar based on genetic, morphological, bioacoustic and ecological evidence. PLoS One 2022; 17:e0263764. [PMID: 35358210 PMCID: PMC8970393 DOI: 10.1371/journal.pone.0263764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 01/26/2022] [Indexed: 11/19/2022] Open
Abstract
In the processes that give rise to new species, changes first occur at the population level. But with the continuous nature of the divergence process, change in biological properties delimiting the shift from “individuals of divergent populations” towards “individuals of distinct species”, as well as abiotic factors driving the change, remain largely ambivalent. Here we study diversification processes at the population level in a semi-aquatic frog, Mantidactylus (Brygoomantis) bellyi, across the diverse vegetation types of Montagne d’Ambre National Park (MANP), Madagascar. Genetic diversity was assessed with seven newly developed microsatellite markers as well as mitochondrial DNA sequences and concordance with patterns of ecological, morphological, and bioacoustic divergence evaluated. We found M. bellyi lacking mitochondrial differentiation within MANP, while microsatellite datasets partitioned them into three highly differentiated, geographically separated subpopulations (with indications for up to five subpopulations). The molecular grouping–primarily clustering individuals by geographic proximity–was coincident with differences in mean depth and width of waters, suggesting a possible role of fluvial characteristics in genetic exchange in this stream-breeding species. Genetic clustering not consistent with differences in call properties, except for dominant call frequencies under the two-subpopulations model. Morphological divergence was mostly consistent with the genetic clustering; subpopulations strongly differed by their snout-vent length, with individuals from high-elevation subpopulations smaller than those from populations below 1000 m above sea level. These results exemplify how mountains and environmental conditions might primarily shape genetic and morphological divergence in frog populations, without strongly affecting their calls.
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Santi F, Vella E, Jeffress K, Deacon A, Riesch R. Phenotypic responses to oil pollution in a poeciliid fish. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 290:118023. [PMID: 34461415 DOI: 10.1016/j.envpol.2021.118023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 08/05/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
Pollution damages ecosystems around the globe and some forms of pollution, like oil pollution, can be either man-made or derived from natural sources. Despite the pervasiveness of oil pollution, certain organisms are able to colonise polluted or toxic environments, yet we only have a limited understanding of how they are affected by it. Here, we analysed phenotypic responses to oil pollution in guppies (Poecilia reticulata) living in oil-polluted habitats across southern Trinidad. We analysed body-shape and life-history traits for 352 individuals from 11 independent populations, six living in oil-polluted environments (including the naturally oil-polluted Pitch Lake), and five stemming from non-polluted habitats. Based on theory of, and previous studies on, responses to environmental stressors, we predicted guppies from oil-polluted waters to have larger heads and shallower bodies, to be smaller, to invest more into reproduction, and to produce more but smaller offspring compared to guppies from non-polluted habitats. Contrary to most of our predictions, we uncovered strong population-specific variation regardless of the presence of oil pollution. Moreover, guppies from oil-polluted habitats were characterised by increased body size; rounder, deeper bodies with increased head size; and increased offspring size, when compared to their counterparts from non-polluted sites. This suggests that guppies in oil-polluted environments are not only subject to the direct negative effects of oil pollution, but might gain some (indirect) benefits from other concomitant environmental factors, such as reduced predation and reduced parasite load. Our results extend our knowledge of organismal responses to oil pollution and highlight the importance of anthropogenic pollution as a source of environmental variation. They also emphasise the understudied ecological heterogeneity of extreme environments.
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Affiliation(s)
- Francesco Santi
- Department of Biological Sciences, Royal Holloway University of London, Egham, UK.
| | - Emily Vella
- Department of Biological Sciences, Royal Holloway University of London, Egham, UK
| | - Katherine Jeffress
- Department of Biological Sciences, Royal Holloway University of London, Egham, UK
| | - Amy Deacon
- Department of Life Sciences, The University of the West Indies, St. Augustine, Trinidad and Tobago
| | - Rüdiger Riesch
- Department of Biological Sciences, Royal Holloway University of London, Egham, UK
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Briñoccoli YF, Jardim de Queiroz L, Bogan S, Paracampo A, Posadas PE, Somoza GM, Montoya‐Burgos JI, Cardoso YP. Processes that drive the population structuring of Jenynsia lineata (Cyprinidontiformes, Anablepidae) in the La Plata Basin. Ecol Evol 2021; 11:6119-6132. [PMID: 34141207 PMCID: PMC8207347 DOI: 10.1002/ece3.7427] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 02/12/2021] [Accepted: 02/19/2021] [Indexed: 11/09/2022] Open
Abstract
The distribution of genetic diversity across a species distribution range is rarely homogeneous, as the genetic structure among populations is related to the degree of isolation among them, such as isolation by distance, isolation by barrier, and isolation by environment. Jenynsia lineata is a small viviparous fish that inhabits a wide range of habitats in South America. To decipher the isolation processes that drive population structuring in J. lineata, we analyzed 221 sequences of the mitochondrial cytochrome c oxidase I gene (COI), from 19 localities. Then, we examined the influence of the three most common types of isolation in order to explain the genetic variation found in this species.Our results revealed a marked structuration, with three groups: (a) La Plata/Desaguadero Rivers (sampling sites across Argentina, Uruguay, and Southern Brazil), (b) Central Argentina, and (c) Northern Argentina. A distance-based redundancy analysis, including the explanatory variables geographical distances, altitude, latitude, and basin, was able to explain up to 65% of the genetic structure. A variance partitioning analysis showed that the two most important variables underlying the structuration in J. lineata were altitude (isolation by environment) and type of basin (isolation by barrier).Our results show that in this species, the processes of population diversification are complex and are not limited to a single mechanism. The processes that play a prominent role in this study could explain the high rate of diversity that characterizes freshwater fish species. And these processes in turn are the basis for possible speciation events.
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Affiliation(s)
- Yanina F. Briñoccoli
- Laboratorio de Ictiofisiología y AcuiculturaInstituto Tecnológico Chascomús (CONICET‐UNSAM)ChascomúsArgentina
| | | | - Sergio Bogan
- Fundación de Historia Natural “Félix de Azara”Departamento de Ciencias Naturales y AntropologíaUniversidad MaimónidesCiudad Autónoma de Buenos AiresArgentina
| | - Ariel Paracampo
- Instituto de Limnología Dr. Raúl A. RingueletCONICET‐CCT La Plata‐UNLPBuenos AiresArgentina
| | - Paula E. Posadas
- CONICETLaboratorio de Sistemática y Biología Evolutiva (LASBE)Facultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataBuenos AiresArgentina
| | - Gustavo M. Somoza
- Laboratorio de Ictiofisiología y AcuiculturaInstituto Tecnológico Chascomús (CONICET‐UNSAM)ChascomúsArgentina
| | | | - Yamila P. Cardoso
- CONICETLaboratorio de Sistemática y Biología Evolutiva (LASBE)Facultad de Ciencias Naturales y MuseoUniversidad Nacional de La PlataBuenos AiresArgentina
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Firpo Lacoste F, Andreoli Bize J, Fernández L. First record sheds light on the distribution of the cyprinodontiform genus Jenynsia (Günther, 1866) in the High Andean Plateau. JOURNAL OF FISH BIOLOGY 2020; 97:1590-1594. [PMID: 32888214 DOI: 10.1111/jfb.14525] [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: 05/23/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
This is the first record of the genus Jenynsia in the High Andean Plateau (HAP). It has been found at elevations between 3400 and 3900 m in three endorreheic systems: Salar Antofalla, Antofagasta de la Sierra and El Peñón, northwestern Argentina, South America. This finding increases the number of known HAP fish genera to five. Furthermore, in contrast to the old Andean species-rich genus Orestias, the presence of Jenynsia obscura populations in young high-altitude, non-marine saline wetlands reported here supports a recent dispersal into the HAP.
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Affiliation(s)
- Francisco Firpo Lacoste
- Ministerio de Ambiente y Desarrollo Sostenible de la Nación and División Ictiología, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" (MACN), Buenos Aires, Argentina
| | - Julieta Andreoli Bize
- Centro Ictiológico Andino, Facultad Ciencias Exactas y Naturales, Universidad Nacional Catamarca, Catamarca, Argentina
| | - Luis Fernández
- Centro Ictiológico Andino, Facultad Ciencias Exactas y Naturales, Universidad Nacional Catamarca, Catamarca, Argentina
- CONICET, Fundación Miguel Lillo, Tucuman, Argentina
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Torres-Dowdall J, Rometsch SJ, Kautt AF, Aguilera G, Meyer A. The direction of genital asymmetry is expressed stochastically in internally fertilizing anablepid fishes. Proc Biol Sci 2020; 287:20200969. [PMID: 32635868 DOI: 10.1098/rspb.2020.0969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Animal genitalia vary considerably across taxa, with divergence in many morphological traits, including striking departures from symmetry. Different mechanisms have been proposed to explain this diversity, mostly assuming that at least some of the phenotypic variation is heritable. However, heritability of the direction of genital asymmetry has been rarely determined. Anablepidae are internally fertilizing fish where the anal fin of males has been modified into an intromittent organ that transfers sperm into the gonopore of females. Males of anablepid fishes exhibit asymmetric genitalia, and both left- and right-sided individuals are commonly found at similar proportions within populations (i.e. antisymmetry). Although this polymorphism was described over a century ago, there have been no attempts to determine if genital asymmetry has a genetic basis and whether the different morphs are accumulating genetic differences, as might be expected since in some species females have also asymmetric gonopores and thereby can only be fertilized by compatible asymmetric males. We address this issue by combining breeding experiments with genome-wide data (ddRAD markers) in representative species of the two anablepid genera with asymmetric genitalia: Anableps and Jenynsia. Breeding experiments showed that all offspring were asymmetric, but their morphotype (i.e. right- or left-sided) was independent of parental morphotype, implying that the direction of asymmetry does not have a strong genetic component. Consistent with this conclusion, association analyses based on approximately 25 000 SNPs did not identify markers significantly associated with the direction of genital asymmetry and there was no evidence of population structure between left- and right-sided individuals. These results suggest that the direction of genital asymmetry in anablepid fishes might be stochastic, a commonly observed pattern in species with antisymmetry in morphological traits.
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Affiliation(s)
- Julián Torres-Dowdall
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Sina J Rometsch
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Andreas F Kautt
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
| | - Gastón Aguilera
- Unidad Ejecutora Lillo (CONICET), Fundación Miguel Lillo, Tucumán, Argentina
| | - Axel Meyer
- Zoology and Evolutionary Biology, Department of Biology, University of Konstanz, 78457 Konstanz, Germany
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Evolutionary biogeography of the freshwater fish family Anablepidae (Teleostei: Cyprinodontiformes), a marine-derived Neotropical lineage. ORG DIVERS EVOL 2020. [DOI: 10.1007/s13127-020-00444-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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