Do cage fish farms promote interference in the trophic niche of wild fish in neotropical reservoir?

Autor: Bruna Caroline Kotz Kliemann, Rosilene Luciana Delariva, Letícia de Oliveira Manoel, Amanda Pereira dos Santos Silva, Rosicleire Veríssimo-Silveira, Igor Paiva Ramos
Přispěvatelé: Universidade Estadual Paulista (UNESP), Universidade Estadual do Oeste do Paraná (UNIOESTE)
Rok vydání: 2022
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
ISSN: 0165-7836
DOI: 10.1016/j.fishres.2021.106198
Popis: Made available in DSpace on 2022-04-28T19:48:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-04-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Cage fish farming in hydroelectric reservoirs has been reported to promote variations in environmental conditions, which directly interfere with the foraging behavior of wild fish. We have hypothesized that the abundance of foods derived from fish farming activities alters the interspecific relationships of wild fish. To test this, we evaluated the diet composition, trophic niche breadth, and trophic niche overlap of the wild fish fauna sampled in two areas (cage farm and control area). Changes in diet composition between areas were observed, resulting in contraction of the trophic niche, and partitioning of food resources in the cage farm area. These results indicate the complexity of the influence of cage fish farms and demonstrate the importance of studies on the wild fish fauna under the influence of these systems. Furthermore, the species evaluated here have economic potential for local fishing, and our results suggest the maintenance of fish stocks in the short term due to the energy supply of the cages. Universidade Estadual Paulista (UNESP) Instituto de Biociências, R. Prof. Dr. Antônio Celso Wagner Zanin, 250 - Distrito de Rubião Junior Universidade Estadual Paulista (UNESP) Faculdade de Engenharia, Rua Monção, 226, Zona Norte Universidade Estadual do Oeste do Paraná (UNIOESTE), Rua Universitária, 2069 Universidade Estadual Paulista (UNESP) Instituto de Biociências, R. Prof. Dr. Antônio Celso Wagner Zanin, 250 - Distrito de Rubião Junior Universidade Estadual Paulista (UNESP) Faculdade de Engenharia, Rua Monção, 226, Zona Norte CAPES: 001 CNPq: 132454/2016-5 CNPq: 303311/2018-5 CNPq: 443103/2014-3/ CNPq: 457083/2014-0
Databáze: OpenAIRE
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