A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish

Functional traits are growing in popularity in modern ecology, but feeding studies remain primarily rooted in a taxonomic-based perspective. However, consumers do not have any reason to select their prey using a taxonomic criterion, and prey assemblages are variable in space and time, which makes ta...

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Autores: Rodríguez Lozano, Pablo, Verkaik, Iraima, Maceda Veiga, Alberto, Monroy López, Mario, Sostoa Fernández, Adolfo de, Rieradevall i Sant, Maria, Prat i Fornells, Narcís
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/107473
Acceso en línea:https://hdl.handle.net/2445/107473
Access Level:acceso abierto
Palabra clave:Peixos
Animals en perill d'extinció
Nutrició animal
Fishes
Rare animals
Animal nutrition
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spelling A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fishRodríguez Lozano, PabloVerkaik, IraimaMaceda Veiga, AlbertoMonroy López, MarioSostoa Fernández, Adolfo deRieradevall i Sant, MariaPrat i Fornells, NarcísPeixosAnimals en perill d'extincióNutrició animalFishesRare animalsAnimal nutritionFunctional traits are growing in popularity in modern ecology, but feeding studies remain primarily rooted in a taxonomic-based perspective. However, consumers do not have any reason to select their prey using a taxonomic criterion, and prey assemblages are variable in space and time, which makes taxon-based studies assemblage-specific. To illustrate the benefits of the trait-based approach to assessing food choice, we studied the feeding ecology of the endangered freshwater fish Barbus meridionalis. We hypothesized that B. meridionalis is a selective predator which food choice depends on several prey morphological and behavioral traits, and thus, its top-down pressure may lead to changes in the functional composition of in-stream macroinvertebrate communities. Feeding selectivity was inferred by comparing taxonomic and functional composition (13 traits) between ingested and free-living potential prey using the Jacob's electivity index. Our results showed that the fish diet was influenced by 10 of the 13 traits tested. Barbus meridionalis preferred prey with a potential size of 5-10 mm, with a medium-high drift tendency, and that drift during daylight. Potential prey with no body flexibility, conical shape, concealment traits (presence of nets and/or cases, or patterned coloration), and high aggregation tendency had a low predation risk. Similarly, surface swimmers and interstitial taxa were low vulnerable to predation. Feeding selectivity altered the functional composition of the macroinvertebrate communities. Fish absence favored taxa with weak aggregation tendency, weak flexibility, and a relatively large size (10-20 mm of potential size). Besides, predatory invertebrates may increase in fish absence. In conclusion, our study shows that the incorporation of the trait-based approach in diet studies is a promising avenue to improve our mechanistic understanding of predator-prey interactions and to help predict the ecological outcomes of predator invasions and extinctions.John Wiley & Sons2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/107473Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1002/ece3.2117Ecology and Evolution, 2016, vol. 6, num. 10, p. 3299-3310https://doi.org/10.1002/ece3.2117cc-by (c) Rodríguez-Lozano, Pablo et al., 2016http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1074732026-05-27T06:46:51Z
dc.title.none.fl_str_mv A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
title A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
spellingShingle A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
Rodríguez Lozano, Pablo
Peixos
Animals en perill d'extinció
Nutrició animal
Fishes
Rare animals
Animal nutrition
title_short A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
title_full A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
title_fullStr A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
title_full_unstemmed A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
title_sort A trait-based approach reveals the feeding selectivity of a small endangered Mediterranean fish
dc.creator.none.fl_str_mv Rodríguez Lozano, Pablo
Verkaik, Iraima
Maceda Veiga, Alberto
Monroy López, Mario
Sostoa Fernández, Adolfo de
Rieradevall i Sant, Maria
Prat i Fornells, Narcís
author Rodríguez Lozano, Pablo
author_facet Rodríguez Lozano, Pablo
Verkaik, Iraima
Maceda Veiga, Alberto
Monroy López, Mario
Sostoa Fernández, Adolfo de
Rieradevall i Sant, Maria
Prat i Fornells, Narcís
author_role author
author2 Verkaik, Iraima
Maceda Veiga, Alberto
Monroy López, Mario
Sostoa Fernández, Adolfo de
Rieradevall i Sant, Maria
Prat i Fornells, Narcís
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Peixos
Animals en perill d'extinció
Nutrició animal
Fishes
Rare animals
Animal nutrition
topic Peixos
Animals en perill d'extinció
Nutrició animal
Fishes
Rare animals
Animal nutrition
description Functional traits are growing in popularity in modern ecology, but feeding studies remain primarily rooted in a taxonomic-based perspective. However, consumers do not have any reason to select their prey using a taxonomic criterion, and prey assemblages are variable in space and time, which makes taxon-based studies assemblage-specific. To illustrate the benefits of the trait-based approach to assessing food choice, we studied the feeding ecology of the endangered freshwater fish Barbus meridionalis. We hypothesized that B. meridionalis is a selective predator which food choice depends on several prey morphological and behavioral traits, and thus, its top-down pressure may lead to changes in the functional composition of in-stream macroinvertebrate communities. Feeding selectivity was inferred by comparing taxonomic and functional composition (13 traits) between ingested and free-living potential prey using the Jacob's electivity index. Our results showed that the fish diet was influenced by 10 of the 13 traits tested. Barbus meridionalis preferred prey with a potential size of 5-10 mm, with a medium-high drift tendency, and that drift during daylight. Potential prey with no body flexibility, conical shape, concealment traits (presence of nets and/or cases, or patterned coloration), and high aggregation tendency had a low predation risk. Similarly, surface swimmers and interstitial taxa were low vulnerable to predation. Feeding selectivity altered the functional composition of the macroinvertebrate communities. Fish absence favored taxa with weak aggregation tendency, weak flexibility, and a relatively large size (10-20 mm of potential size). Besides, predatory invertebrates may increase in fish absence. In conclusion, our study shows that the incorporation of the trait-based approach in diet studies is a promising avenue to improve our mechanistic understanding of predator-prey interactions and to help predict the ecological outcomes of predator invasions and extinctions.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/107473
url https://hdl.handle.net/2445/107473
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1002/ece3.2117
Ecology and Evolution, 2016, vol. 6, num. 10, p. 3299-3310
https://doi.org/10.1002/ece3.2117
dc.rights.none.fl_str_mv cc-by (c) Rodríguez-Lozano, Pablo et al., 2016
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Rodríguez-Lozano, Pablo et al., 2016
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons
publisher.none.fl_str_mv John Wiley & Sons
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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