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Trophic Patterns of Freshwater Fish across the Balkan Biodiversity Hotspot. WATER 2022. [DOI: 10.3390/w14071112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Ecological information regarding trophic patterns and the inherent structure of freshwater aquatic communities is considered fundamental in ecological research. In this study, the trophic patterns of the Greek freshwater fish fauna, belonging to the Balkan biodiversity hotspot, were investigated, and comparisons of freshwater fish species feeding habits among the Greek freshwater ecoregions were performed. The analyses based on the widely used trophic level index and the available composition feeding datasets, along with the utilization of clustering methods, indicated seven major distinct trophic guilds in the Greek ecoregions. The trophic level of the studied fish species ranged from 2.0 to 4.5, thus being within the expected values for freshwater ecosystems, revealing the presence of both top predators and primary consumers. The highest trophic level values were found in the ecoregions of northern Greece. The results also exhibited considerable predominance of higher-trophic-level zooplanktivorous and insectivorous freshwater fish species in the mainland, compared to lower-trophic-level opportunist species in the island-isolated ecoregions. These results could be used for the application of ecosystem-based models and the formulation of conservation and fishery management schemes.
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2
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Bonnaffé W, Danet A, Legendre S, Edeline E. Comparison of size‐structured and species‐level trophic networks reveals antagonistic effects of temperature on vertical trophic diversity at the population and species level. OIKOS 2021. [DOI: 10.1111/oik.08173] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Willem Bonnaffé
- Sorbonne Université, Université Paris Diderot, UPEC, CNRS, INRA, IRD, Inst. d'Ecologie et des Sciences de l'Environnement de Paris (iEES‐Paris) Paris France
- Ecological and Evolutionary Dynamics Lab, Dept of Zoology, Univ. of Oxford Oxford UK
- Inst. de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS, INSERM, Ecole Normale Supérieure, PSL Research Univ. Paris France
| | - Alain Danet
- Centre d'Ecologie et des Sciences de la Conservation, UMR 7204 MNHN‐CNRS‐Sorbonne Université, Muséum National d'Histoire Naturelle de Paris Paris France
| | - Stéphane Legendre
- Inst. de Biologie de l'Ecole Normale Supérieure (IBENS), CNRS, INSERM, Ecole Normale Supérieure, PSL Research Univ. Paris France
| | - Eric Edeline
- Sorbonne Université, Université Paris Diderot, UPEC, CNRS, INRA, IRD, Inst. d'Ecologie et des Sciences de l'Environnement de Paris (iEES‐Paris) Paris France
- ESE Ecology and Ecosystem Health, INRA, Agrocampus Ouest Rennes France
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3
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Adámek Z, Mikl L, Šlapanský L, Jurajda P, Halačka K. The diet of predatory fish in drinking water reservoirs – how can they contribute to biomanipulation efforts? FOLIA ZOOLOGICA 2019. [DOI: 10.25225/fozo.014.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Zdeněk Adámek
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65 Brno, Czech Republic; e-mail:
| | - Libor Mikl
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65 Brno, Czech Republic; e-mail:
| | - Luděk Šlapanský
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65 Brno, Czech Republic; e-mail:
| | - Pavel Jurajda
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65 Brno, Czech Republic; e-mail:
| | - Karel Halačka
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65 Brno, Czech Republic; e-mail:
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4
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Gray BP, Bishop MA, Powers S. Structure of winter groundfish feeding guilds in Pacific herring Clupea pallasii and walleye pollock Gadus chalcogrammus nursery fjords. JOURNAL OF FISH BIOLOGY 2019; 95:527-539. [PMID: 30989661 DOI: 10.1111/jfb.13984] [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: 12/13/2018] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Abstract
The contents of 1056 stomachs were included in a trophic-guild analysis to document separation amongst 16 groundfish species inhabiting Pacific herring Clupea pallasii and walleye pollock Gadus chalcogrammus nursery fjords in Prince William Sound, Alaska and to determine the relative contribution of C. pallasii and G. chalcogrammus to that separation. A total of five multi-species feeding guilds and one outlier species were determined through multivariate analyses. Major gradients of trophic separation spanned from invertebrates (mostly shrimps, crabs and unidentified decapods) to fishes (mostly unidentified fishes, C. pallasii and G. chalcogrammus) a pattern that was influenced by intra and interspecific differences in predator lengths. While C. pallasii and G. chalcogrammus were important to the overall guild structure, within-guild similarities were consistently highest due to unidentified fishes. In general, larger predators consumed the largest C. pallasii and G. chalcogrammus, with the smaller-on-average predators consuming smaller C. pallasii and fewer or smaller G. chalcogrammus. Regardless of guild inclusion, groundfishes primarily consumed pre-recruit C. pallasii and G. chalcogrammus (i.e., younger than age 3 years fishes), which has the potential to negatively influence recruitment of these forage fishes to the adult, spawning population.
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Affiliation(s)
- Benjamin P Gray
- Marine Fisheries Research, Prince William Sound Science Center, Cordova, Alaska, USA
| | - Mary Anne Bishop
- Marine Fisheries Research, Prince William Sound Science Center, Cordova, Alaska, USA
| | - Sean Powers
- Department of Marine Sciences, University of South Alabama, Mobile, Alabama, USA
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Jurczak T, Wojtal-Frankiewicz A, Frankiewicz P, Kaczkowski Z, Oleksińska Z, Bednarek A, Zalewski M. Comprehensive approach to restoring urban recreational reservoirs. Part 2 - Use of zooplankton as indicators for the ecological quality assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 653:1623-1640. [PMID: 30107888 DOI: 10.1016/j.scitotenv.2018.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/29/2018] [Accepted: 08/01/2018] [Indexed: 06/08/2023]
Abstract
The presented research is part of the LIFE project ("EH-REK" LIFE08 ENV/PL/000517) on innovative restoration methods for small urban impoundments in the city of Łódź (Poland). The objective was to evaluate the usefulness of zooplankton as a biological quality element, when assessing the effectiveness of restoration efforts in three urban reservoirs and a one pond. The fifth unrestored pond was used as an example of the progressive eutrophication of an urban ecosystem. Studies were conducted during two periods: before (2010-2012) and after (2013-2016) restoration. A selection of zooplankton indices, including the rotifer trophic state index (TSIROT), was used. The influence of the supplying river resulted in the negligible responses of biological parameters to the restoration efforts in the Upper Arturówek (UA) reservoir, which is the first in cascade of reservoirs. However, clear symptoms of water quality improvements were observed in the other two reservoirs (the Middle Arturówek, MA; the Lower Arturówek, LA) and in the Bzura-17 (B17) pond. After restoration, the contribution of species indicative of high trophic levels decreased in these ecosystems. The TSIROT was strongly positively correlated with the trophic state index based on chlorophyll a, and both parameters significantly decreased in the MA, LA and B17. In the unrestored pond (B11), the successive increase in the concentrations of chemical parameters indicated progressing eutrophication. Interestingly, since 2013, the TSIROT values clearly decreased in B11, but the strong negative correlation between ammonium concentration and rotifer density indicated that the reduced TSIROT values didn't result from improvements in water quality; rather, they resulted from the increases in pollution and the associated harmful impacts on Rotifera. In conclusion, the TSIROT can be a useful tool for assessing the ecological quality of small urban ecosystems; however, the use of biological indices must be supported by also monitoring physicochemical parameters.
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Affiliation(s)
- Tomasz Jurczak
- Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of Łódź, 90-237 Łódź, 12/16 Banacha str., Poland.
| | - Adrianna Wojtal-Frankiewicz
- Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of Łódź, 90-237 Łódź, 12/16 Banacha str., Poland
| | - Piotr Frankiewicz
- Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of Łódź, 90-237 Łódź, 12/16 Banacha str., Poland
| | - Zbigniew Kaczkowski
- Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of Łódź, 90-237 Łódź, 12/16 Banacha str., Poland
| | - Zuzanna Oleksińska
- Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of Łódź, 90-237 Łódź, 12/16 Banacha str., Poland
| | - Agnieszka Bednarek
- Department of Applied Ecology, Faculty of Biology and Environmental Protection, University of Łódź, 90-237 Łódź, 12/16 Banacha str., Poland
| | - Maciej Zalewski
- European Regional Centre for Ecohydrology PAS, 90-364 Łódź, 3 Tylna str., Poland
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6
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Early life-history predator-prey reversal in two cyprinid fishes. Sci Rep 2017; 7:6924. [PMID: 28761092 PMCID: PMC5537303 DOI: 10.1038/s41598-017-07339-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 06/28/2017] [Indexed: 12/04/2022] Open
Abstract
Predator-prey relationships are often perceived simply as a situation in which a predator enhances its own fitness while reducing the fitness of its prey. However, this relationship may become reversed when the prey feeds on the juvenile predator stages. We investigated this phenomenon in a model asp (Leuciscus aspius; predator)-bleak (Alburnus alburnus; prey) relationship. The adhesive asp eggs are available for bleak predation after a spawning event for only tens of seconds before they adhere to the stones, where bleak do not forage. Gut content analysis demonstrated that eggs were utilized in high quantities, especially in the spawning peak of the asp reproductive season. Furthermore, using underwater video, we recorded the bleak feeding efficiency on naturally drifting asp eggs as the percentage of eggs eaten. Within the 40 cm egg trajectory captured by our cameras, total egg mortality was 21.2 ± 2.2% on average. The highest survival chances occurred among eggs drifting in aggregations, since the short drifting distance together with their aggregated distribution satiated bleak and part of the egg aggregation could attach to the spawning ground. This study emphasizes the potential efficiency of predator egg utilization by prey, which may have further consequences in predator-prey dynamics.
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Egan JP, Chew US, Kuo CH, Villarroel-Diaz V, Hundt PJ, Iwinski NG, Hammer MP, Simons AM. Diets and trophic guilds of small fishes from coastal marine habitats in western Taiwan. JOURNAL OF FISH BIOLOGY 2017; 91:331-345. [PMID: 28593647 DOI: 10.1111/jfb.13355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
The diets and trophic guilds of small fishes were examined along marine sandy beaches and in estuaries at depths <1·5 m in western Taiwan, Republic of China. Copepods were the most frequently identified item in fish guts, indicating they are key prey for the fish assemblages studied. Piscivore, crustacivore, detritivore, omnivore, zooplanktivore and terrestrial invertivore trophic guilds were identified. The zooplanktivore guild contained the most fish species. Maximum prey size consumption was positively correlated with standard length (LS ) in seven species and at the assemblage level and negatively correlated with LS in a single detritivorous species. The diet data and trophic guild scheme produced by this study contribute to an understanding of coastal marine food webs and can inform ecosystem-based fisheries management.
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Affiliation(s)
- J P Egan
- University of Minnesota Conservation Sciences Graduate Program, 135B Skok Hall, 2003 Upper Buford Circle, St Paul, MN, 55108, U.S.A
- James Ford Bell Museum of Natural History, 10 Church Street SE, Minneapolis, MN, 55455, U.S.A
| | - U-S Chew
- National Chiayi University Department of Aquatic Biosciences, No. 300, University Road, Chiayi City, Taiwan, Republic of China
| | - C-H Kuo
- National Chiayi University Department of Aquatic Biosciences, No. 300, University Road, Chiayi City, Taiwan, Republic of China
| | - V Villarroel-Diaz
- University of Minnesota College of Science and Engineering, 117 Pleasant St SE, Minneapolis, MN, 55455, U.S.A
| | - P J Hundt
- University of Minnesota Conservation Sciences Graduate Program, 135B Skok Hall, 2003 Upper Buford Circle, St Paul, MN, 55108, U.S.A
- James Ford Bell Museum of Natural History, 10 Church Street SE, Minneapolis, MN, 55455, U.S.A
| | - N G Iwinski
- University of Minnesota College of Biological Sciences, St. Paul, MN, 55108, U.S.A
| | - M P Hammer
- Museum and Art Gallery of the Northern Territory, GPO Box 4646, Darwin, NT, 0801, Australia
| | - A M Simons
- James Ford Bell Museum of Natural History, 10 Church Street SE, Minneapolis, MN, 55455, U.S.A
- University of Minnesota Department of Fisheries, Wildlife and Conservation Biology, 135B Skok Hall, 2003 Upper Buford Circle, St Paul, MN, 55108, U.S.A
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8
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Macrophytes shape trophic niche variation among generalist fishes. PLoS One 2017; 12:e0177114. [PMID: 28486550 PMCID: PMC5423621 DOI: 10.1371/journal.pone.0177114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 04/21/2017] [Indexed: 11/28/2022] Open
Abstract
Generalist species commonly have a fundamental role in ecosystems as they can integrate spatially distinct habitats and food-web compartments, as well as control the composition, abundance and behavior of organisms at different trophic levels. Generalist populations typically consist of specialized individuals, but the potential for and hence degree of individual niche variation can be largely determined by habitat complexity. We compared individual niche variation within three generalist fishes between two comparable lakes in the Czech Republic differing in macrophyte cover, i.e. macrophyte-rich Milada and macrophyte-poor Most. We tested the hypothesis that large individual niche variation among generalist fishes is facilitated by the presence of macrophytes, which provides niches and predation shelter for fish and their prey items. Based on results from stable nitrogen (δ15N) and carbon (δ13C) isotopic mixing models, perch (Perca fluviatilis L.) and rudd (Scardinius erythrophthalmus (L.)) showed larger individual variation (i.e., variance) in trophic position in Milada as compared to Most, whereas no significant between-lake differences were observed for roach (Rutilus rutilus (L.)). Contrary to our hypothesis, all the three species showed significantly lower individual variation in the relative reliance on littoral food resources in Milada than in Most. Rudd relied significantly more whereas perch and roach relied less on littoral food resources in Milada than in Most, likely due to prevalent herbivory by rudd and prevalent zooplanktivory by perch and roach in the macrophyte-rich Milada as compared to macrophyte-poor Most. Our study demonstrates how the succession of macrophyte vegetation, via its effects on the physical and biological complexity of the littoral zone and on the availability of small prey fish and zooplankton, can strongly influence individual niche variation among generalist fishes with different ontogenetic trajectories, and hence the overall food-web structures in lake ecosystems.
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9
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Patonai K, Jordán F. Aggregation of incomplete food web data may help to suggest sampling strategies. Ecol Modell 2017. [DOI: 10.1016/j.ecolmodel.2017.02.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Borsodi AK, Szabó A, Krett G, Felföldi T, Specziár A, Boros G. Gut content microbiota of introduced bigheaded carps (Hypophthalmichthys spp.) inhabiting the largest shallow lake in Central Europe. Microbiol Res 2016; 195:40-50. [PMID: 28024525 DOI: 10.1016/j.micres.2016.11.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 09/28/2016] [Accepted: 11/04/2016] [Indexed: 12/17/2022]
Abstract
Studying the microbiota in the alimentary tract of bigheaded carps (Hypophthalmichthys spp.) gained special interest recently, as these types of investigations on non-native fish species may lead to a better understanding of their ecological role and feeding habits in an invaded habitat. For microbiological examinations, bigheaded carp gut contents and water column samples from Lake Balaton (Hungary) were collected from spring to autumn in 2013. Denaturing Gradient Gel Electrophoresis (DGGE) and pyrosequencing of the 16S rRNA gene were performed to reveal the composition. According to the DGGE patterns, bacterial communities of water samples separated clearly from that of the intestines. Moreover, the bacterial communities in the foreguts and hindguts were also strikingly dissimilar. Based on pyrosequencing, both foregut and hindgut samples were predominated by the fermentative genus Cetobacterium (Fusobacteria). The presence of some phytoplankton taxa and the high relative abundance of cellulose-degrading bacteria in the guts suggest that intestinal microbes may have an important role in digesting algae and making them utilizable for bigheaded carps that lack cellulase enzyme. In turn, the complete absence of typical heterotrophic freshwater bacteria in all studied sections of the intestines indicated that bacterioplankton probably has a negligible role in the nutrition of bigheaded carps.
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Affiliation(s)
- Andrea K Borsodi
- Department of Microbiology, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary.
| | - Attila Szabó
- Department of Microbiology, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary
| | - Gergely Krett
- Department of Microbiology, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary
| | - Tamás Felföldi
- Department of Microbiology, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary
| | - András Specziár
- Balaton Limnological Institute, MTA Centre for Ecological Research, Klebelsberg K. u. 3, H-8237 Tihany, Hungary
| | - Gergely Boros
- Balaton Limnological Institute, MTA Centre for Ecological Research, Klebelsberg K. u. 3, H-8237 Tihany, Hungary
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Vejřík L, Matějíčková I, Seďa J, Blabolil P, Jůza T, Vašek M, Ricard D, Matěna J, Frouzová J, Kubečka J, Říha M, Čech M. Who Is Who: An Anomalous Predator-Prey Role Exchange between Cyprinids and Perch. PLoS One 2016; 11:e0156430. [PMID: 27276078 PMCID: PMC4898736 DOI: 10.1371/journal.pone.0156430] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 05/15/2016] [Indexed: 11/18/2022] Open
Abstract
Piscivory in cyprinids (Cyprinidae) is extremely rare. Specifically, common bream (Abramis brama) and common carp (Cyprinus carpio) are zooplanktivorous fish in deep lentic waters. Nevertheless, we observed predation by these two cyprinids under natural conditions in the Vír Reservoir, Czech Republic. We conducted diet analysis for cyprinids caught by trawling and gillnets and the large amount of young-of-the-year (YOY) perch (Perca fluviatilis), with sizes of 37–52 mm standard length, were found in their digestive tracts. In 2010, a large amount of YOY perch caused a significant decrease in Daphnia spp. size and abundance in the reservoir. Hence, a food deficit was induced for the cyprinids, apparent also from the poor nutritional condition of common bream which was much worse than the condition of those in similar reservoirs. Common carp and common bream shifted to forced piscivory, and they utilized the YOY perch as an alternative food source. In contrast, smaller species, such as roach (Rutilus rutilus) and bleak (Alburnus alburnus), widely utilized planktonic cyanobacteria. In the following year, YOY perch occurred in significantly lower numbers and conversely, Daphnia spp. size and abundance were significantly higher. The forced piscivory was not observed. Our results indicate a switch to forced piscivory by cyprinids, which was caused by a shortage of their natural food source. Moreover, this phenomenon presents an effective mechanism for reduction in the numbers of YOY perch, ensuring the stability of the ecosystem.
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Affiliation(s)
- Lukáš Vejřík
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 31, 37005, České Budějovice, Czech Republic
- * E-mail:
| | - Ivana Matějíčková
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 31, 37005, České Budějovice, Czech Republic
| | - Jaromír Seďa
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Petr Blabolil
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 31, 37005, České Budějovice, Czech Republic
| | - Tomáš Jůza
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Mojmír Vašek
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Daniel Ricard
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Josef Matěna
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Jaroslava Frouzová
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Jan Kubečka
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Milan Říha
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
| | - Martin Čech
- Biology Centre of the Czech Academy of Sciences, v.v.i., Institute of Hydrobiology, Na Sádkách 7, 37005, České Budějovice, Czech Republic
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12
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Silveira TS, Calegaro-Marques C. Helminth parasite diversity discloses age and sex differences in the foraging behaviour of southern lapwings (Vanellus chilensis
). AUSTRAL ECOL 2016. [DOI: 10.1111/aec.12344] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Tiago S. Silveira
- Departamento de Zoologia, Programa de Pós-graduação em Biologia Animal, Instituto de Biociências; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Cláudia Calegaro-Marques
- Departamento de Zoologia, Programa de Pós-graduação em Biologia Animal, Instituto de Biociências; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
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13
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Molecular study of Prussian carp – an invasive species in the lakes of the Leszno Lakeland. ACTA BIOLOGICA 2016. [DOI: 10.18276/ab.2016.23-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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14
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Buchheister A, Latour RJ. Diets and trophic-guild structure of a diverse fish assemblage in Chesapeake Bay, U.S.A. JOURNAL OF FISH BIOLOGY 2015; 86:967-992. [PMID: 25627041 DOI: 10.1111/jfb.12621] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 11/18/2014] [Indexed: 06/04/2023]
Abstract
Dietary habits and trophic-guild structure were examined in a fish assemblage (47 species) of the Chesapeake Bay estuary, U.S.A., using 10 years of data from >25 000 fish stomachs. The assemblage was comprised of 10 statistically significant trophic guilds that were principally differentiated by the relative amounts of Mysida, Bivalvia, Polychaeta, Teleostei and other Crustacea in the diets. These guilds were broadly aggregated into five trophic categories: piscivores, zooplanktivores, benthivores, crustacivores and miscellaneous consumers. Food web structure was largely dictated by gradients in habitat (benthic to pelagic) and prey size. Size classes within piscivorous species were more likely to be classified into different guilds, reflecting stronger dietary changes through ontogeny relative to benthivores and other guilds. Relative to predator species and predator size, the month of sampling had negligible effects on dietary differences within the assemblage. A majority of sampled fishes derived most of their nutrition from non-pelagic prey sources, suggesting a strong coupling of fish production to benthic and demersal food resources. Mysida (predominantly the opossum shrimp Neomysis americana) contributed substantially to the diets of over 25% of the sampled predator groups, indicating that this species is a critical, but underappreciated, node in the Chesapeake Bay food web.
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Affiliation(s)
- A Buchheister
- Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, P. O. Box 38, Solomons, MD 20688, U.S.A
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15
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Rüdel H, Böhmer W, Müller M, Fliedner A, Ricking M, Teubner D, Schröter-Kermani C. Retrospective study of triclosan and methyl-triclosan residues in fish and suspended particulate matter: results from the German Environmental Specimen Bank. CHEMOSPHERE 2013; 91:1517-1524. [PMID: 23336923 DOI: 10.1016/j.chemosphere.2012.12.030] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 12/17/2012] [Accepted: 12/21/2012] [Indexed: 06/01/2023]
Abstract
A retrospective monitoring of triclosan (TCS; period 1994-2003 and 2008) and its potential transformation product methyl-triclosan (MTCS; period 1994-2008) was performed using archived fish samples from German rivers (16 sites, including Elbe and Rhine). At four of these sites suspended particulate matter (SPM) was also investigated covering the period 2005-2007. Samples were analyzed by GC/MS, either directly (MTCS) or after derivatization (TCS). TCS burdens of fish muscle tissue ranged from <0.2-3.4 ng g(-1) ww (wet weight; corresponding to <2-69 ng g(-1) lw, lipid weight) without apparent concentration trends over time. MTCS was detected at considerably higher concentrations in fish ranging from 1.0-33 ng g(-1) ww (47-1010 ng g(-1) lw) and increased until about 2003-2005. Thereafter, concentrations generally were lower, although at some sites single higher values were observed in recent years. In SPM, decreasing MTCS concentrations in the range 1-4 ng g(-1) dry weight were detected while TCS was always below the limit of quantification. Assuming that MTCS concentrations are correlated to TCS consumption, the observed decrease in MTCS levels may be partly a result of the voluntary renunciation of TCS use in detergents for, e.g., laundry or dishwashing declared by a manufacturers' association in 2001. Because of a lack of ecotoxicity studies for MTCS, a QSAR-derived predicted no effect concentration (PNEC) was compared to averaged ambient water concentrations of fish which were calculated from maximum tissue residues by applying an appropriate bioconcentration factor from literature. Since these calculated water concentrations were below the PNEC it is assumed that MTCS alone poses no immediate risk to aquatic organism. The conversion to a PNEC for SPM organisms and comparison with detected SPM levels of MTCS also revealed no risk.
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Affiliation(s)
- Heinz Rüdel
- Fraunhofer Institute for Molecular Biology and Applied Ecology (Fraunhofer IME), 57392 Schmallenberg, Germany.
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Specziár A. Size-dependent prey selection in piscivorous pikeperch Sander lucioperca and Volga pikeperch Sander volgensis shaped by bimodal prey size distribution. JOURNAL OF FISH BIOLOGY 2011; 79:1895-1917. [PMID: 22141894 DOI: 10.1111/j.1095-8649.2011.03127.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Prey size and species selection of pikeperch Sander lucioperca and Volga pikeperch Sander volgensis were investigated in relation to predator size in the shallow Lake Balaton, Hungary. Although their gape sizes were similar, S. lucioperca shifted to piscivory earlier and consumed fewer, but larger, prey than S. volgensis. Prey species preference of the two piscivores also differed. A bimodal prey size distribution resulted in a reclining sigmoid curve for the life span predator size to prey size relationship with inflexion points between 266 and 284 mm predator standard length (L(S) ) in S. lucioperca. In S. volgensis, as well as in S. lucioperca L(S) ≤ 350 mm, prey size increased monotonically with predator L(S) , following a power trend for all prey size variables. Prey depth to predator L(S) relationship varied significantly with prey species and prey number in both piscivores, and prey depth tended to be smaller in predators consuming more than one prey. Both predator species characteristically selected less active, benthic prey fishes in spite of their spiny fin rays, and small- and mid-sized predators selected for small prey. Relatively large prey were also eaten, however, especially by the smallest and largest S. lucioperca.
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Affiliation(s)
- A Specziár
- Balaton Limnological Research Institute of Hungarian Academy of Sciences, Klebelsberg K. u. 3., H-8237 Tihany, Hungary.
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Ximenes LQL, Mateus LADF, Penha JMF. Variação temporal e espacial na composição de guildas alimentares da ictiofauna em lagoas marginais do Rio Cuiabá, Pantanal Norte. BIOTA NEOTROPICA 2011. [DOI: 10.1590/s1676-06032011000100022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
O presente trabalho teve como objetivo avaliar a variação espacial e temporal das guildas alimentares das comunidades de peixes em 10 lagoas marginais do Rio Cuiabá no Pantanal. As lagoas foram amostradas em três períodos do ciclo hidrológico (início e final da seca e início da enchente de 2005). As guildas alimentares foram determinadas através da análise do conteúdo estomacal das espécies mais abundantes da comunidade. Foram analisadas 37 espécies pertencentes a oito guildas alimentares (insetívora, herbívora, onívora, zooplanctívora, planctívora, detritívora, bentívora e iliófaga), as quais variaram espacial e temporalmente. Observamos uma mudança na composição das guildas tróficas entre os períodos e locais analisados, porém o número de guildas não variou espaço-temporalmente. Nossos resultados sugerem que as mudanças espaciais e temporais na composição das guildas podem estar relacionadas com diversos fatores, como as alterações na composição da comunidade onde novas espécies podem compor as diferentes guildas; a exploração de recursos mais abundantes em determinadas épocas do ano favorecendo a presença de algumas guildas somente em alguns períodos.
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