Molecular analyses of carangid fish diets reveal inter-predation, dietary overlap, and the importance of early life stages in trophic ecology.

Autor: Rosa FDAS; Group for Integrated Biological Investigation, Center for Advanced Studies of Biodiversity Federal University of Pará Belém Brazil., Gasalla MA; Fisheries Ecosystems Laboratory, Oceanographic Institute University of São Paulo São Paulo Brazil., de Queiroz AKO; Group for Integrated Biological Investigation, Center for Advanced Studies of Biodiversity Federal University of Pará Belém Brazil.; Natural History Museum University of Oslo Oslo Norway., Ribas TFA; Group for Integrated Biological Investigation, Center for Advanced Studies of Biodiversity Federal University of Pará Belém Brazil., Mauvisseau Q; Natural History Museum University of Oslo Oslo Norway., de Boer HJ; Natural History Museum University of Oslo Oslo Norway., Thorbek BLG; Natural History Museum University of Oslo Oslo Norway., Oliveira RRM; Instituto Tecnológico Vale Belém Brazil.; Postgraduate Program in Bioinformatics Federal University of Minas Gerais Belo Horizonte Brazil., Laux M; Ecology Department Federal University of Minas Gerais Belo Horizonte Brazil., Postuma FA; Fisheries Ecosystems Laboratory, Oceanographic Institute University of São Paulo São Paulo Brazil., Ready JS; Group for Integrated Biological Investigation, Center for Advanced Studies of Biodiversity Federal University of Pará Belém Brazil.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2024 Jan 04; Vol. 14 (1), pp. e10817. Date of Electronic Publication: 2024 Jan 04 (Print Publication: 2024).
DOI: 10.1002/ece3.10817
Abstrakt: Carangid fishes are commercially important in fisheries and aquaculture. They are distributed worldwide in both tropical and subtropical marine ecosystems. Their role in food webs is often unclear since their diet cannot be easily identified by traditional gut content analysis. They are suspected to prey on pelagic and benthic species, with clupeiform fishes being important dietary items for some species, though it is unknown whether carangids share food resources or show trophic segregation. Here, we used metabarcoding to overcome traditional challenges of taxonomic approaches to analyze the diet of seven carangid species caught as bycatch in the Brazilian southwest Atlantic sardine fishery. Stomach contents were processed from the following species: Caranx crysos , Caranx latus , Chloroscombrus chrysurus , Hemicaranx amblyrhynchus , Oligoplites saliens , Selene setapinnis , and Trachinotus carolinus . Identified diets were dominated by teleost fishes. The C. latus diet was the most distinct among the seven species, preferentially consuming Engraulis anchoita , but H. amblyrhynchus , O. saliens , and S. setapinnis also showed a trend of predominantly consuming small pelagic fishes. Finally, we found evidence of inter-predation in carangids, especially strong between S. setapinnis and C. crysos , suggesting that consumption of early life stages may result in indirect competition through reduced recruitment in these fishes. These findings provide unprecedented insights into the biodiversity in marine ecosystems, especially the poorly known diet of carangid fishes.
Competing Interests: The authors declare to have no conflicts of interest.
(© 2024 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz: