Trophic relationships of Limnoperna fortunei with adult fishes

In South America, the inventory of species that feed on Limnoperna fortunei has increased steadily; in 2006, 18 fish species had been identified as predators of L. fortunei, whereas 7 years later, the list had grown to almost 50 species. In some areas, fishes that consume L. fortunei represent >...

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Autor principal: Cataldo, D.
Formato: CHAP
Materias:
Ecological impact
Fish diet
Golden mussel
Limnoperna fortunei
Predation by fish
Trophic interactions
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_97833191_v_n_p231_Cataldo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_97833191_v_n_p231_Cataldo2023-10-03T16:44:51Z Trophic relationships of Limnoperna fortunei with adult fishes Cataldo, D. Ecological impact Fish diet Golden mussel Limnoperna fortunei Predation by fish Trophic interactions In South America, the inventory of species that feed on Limnoperna fortunei has increased steadily; in 2006, 18 fish species had been identified as predators of L. fortunei, whereas 7 years later, the list had grown to almost 50 species. In some areas, fishes that consume L. fortunei represent > 50 % of the species regularly present in commercial fisheries, including traditionally omnivorous, iliophagous, and ichthyophagous forms. Several economically important species have significantly changed their feeding habits since the mussel’s introduction, shifting from a diet based on plants and detritus to one dominated by adult mussels. Consumption of golden mussels is not restricted to fishes provided with teeth that can crush and grind the shells; many toothless species swallow whole specimens or nibble on the exposed siphons and mantle edges of the bivalve. Golden mussels can account for up to 100 % of the gut contents of some fish species, especially during the summer. Feeding of fishes on L. fortunei often involves the selective consumption of the smaller mussel size classes. Fish predation pressure on the mussel is likely high and it probably represents the most significant mechanism that modulates L. fortunei populations, but it is very unlikely to eradicate the mussel altogether. No comprehensive, large-scale studies are yet available on the effects of this new food supply on local fish stocks, but ancillary information suggests that these effects are likely very significant. Impacts are not restricted to species that consume the mollusc, but also affect species that benefit from this new food resource indirectly, including large ichthyophagous species feeding on molluscivorous forms, as well as on those that consume the organic matter-enriched sediments by the mussel’s feces and pseudofeces. © Springer International Publishing Switzerland 2015. Fil:Cataldo, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. CHAP info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_97833191_v_n_p231_Cataldo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Ecological impact
Fish diet
Golden mussel
Limnoperna fortunei
Predation by fish
Trophic interactions
spellingShingle Ecological impact
Fish diet
Golden mussel
Limnoperna fortunei
Predation by fish
Trophic interactions
Cataldo, D.
Trophic relationships of Limnoperna fortunei with adult fishes
topic_facet Ecological impact
Fish diet
Golden mussel
Limnoperna fortunei
Predation by fish
Trophic interactions
description In South America, the inventory of species that feed on Limnoperna fortunei has increased steadily; in 2006, 18 fish species had been identified as predators of L. fortunei, whereas 7 years later, the list had grown to almost 50 species. In some areas, fishes that consume L. fortunei represent > 50 % of the species regularly present in commercial fisheries, including traditionally omnivorous, iliophagous, and ichthyophagous forms. Several economically important species have significantly changed their feeding habits since the mussel’s introduction, shifting from a diet based on plants and detritus to one dominated by adult mussels. Consumption of golden mussels is not restricted to fishes provided with teeth that can crush and grind the shells; many toothless species swallow whole specimens or nibble on the exposed siphons and mantle edges of the bivalve. Golden mussels can account for up to 100 % of the gut contents of some fish species, especially during the summer. Feeding of fishes on L. fortunei often involves the selective consumption of the smaller mussel size classes. Fish predation pressure on the mussel is likely high and it probably represents the most significant mechanism that modulates L. fortunei populations, but it is very unlikely to eradicate the mussel altogether. No comprehensive, large-scale studies are yet available on the effects of this new food supply on local fish stocks, but ancillary information suggests that these effects are likely very significant. Impacts are not restricted to species that consume the mollusc, but also affect species that benefit from this new food resource indirectly, including large ichthyophagous species feeding on molluscivorous forms, as well as on those that consume the organic matter-enriched sediments by the mussel’s feces and pseudofeces. © Springer International Publishing Switzerland 2015.
format CHAP
author Cataldo, D.
author_facet Cataldo, D.
author_sort Cataldo, D.
title Trophic relationships of Limnoperna fortunei with adult fishes
title_short Trophic relationships of Limnoperna fortunei with adult fishes
title_full Trophic relationships of Limnoperna fortunei with adult fishes
title_fullStr Trophic relationships of Limnoperna fortunei with adult fishes
title_full_unstemmed Trophic relationships of Limnoperna fortunei with adult fishes
title_sort trophic relationships of limnoperna fortunei with adult fishes
url http://hdl.handle.net/20.500.12110/paper_97833191_v_n_p231_Cataldo
work_keys_str_mv AT cataldod trophicrelationshipsoflimnopernafortuneiwithadultfishes
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