High occurrence of jellyfish predation by black-browed and Campbell albatross identified by DNA metabarcoding

Autor: Andrew Stanworth, David R. Thompson, Mary-Anne Lea, Henri Weimerskirch, Rachael Alderman, Ben Raymond, Cristián G. Suazo, Richard A. Phillips, Simon N. Jarman, Paulo Catry, Michaël Gras, Julie C. McInnes, Bruce E. Deagle
Přispěvatelé: Institute for Marine and Antarctic Studies [Horbat] (IMAS), University of Tasmania (UTAS), Australian Antarctic Division (AAD), Australian Government, Department of the Environment and Energy, Department of Primary Industries [Australia], Department of Primary Industries, Parks, Water and Environment, British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Falklands Conservation, National Institute of Water and Atmospheric Research, National Institute of Water, Marine and Environmental Sciences Centre [Portugal] (MARE), Instituto Universitário de Ciências Psicológicas, Sociais e da Vida (ISPA), Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), Department of Animal Ecology and Systematics [Germany], Justus-Liebig-Universität Gießen (JLU), Directorate of Natural Resources- Fisheries of the Falkland Islands Government, CIBIO-InBIO - Universidade do Porto, Universidade do Porto [Porto], University of Tasmania [Hobart, Australia] (UTAS), National Institute of Water and Atmospheric Research [Wellington] (NIWA), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Directorate of Natural Resources - Fisheries of the Falkland Islands Government, Universidade do Porto
Rok vydání: 2017
Předmět:
Zdroj: Molecular Ecology
Molecular Ecology, Wiley, 2017, 26 (18), pp.4831-4845. ⟨10.1111/mec.14245⟩
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
ISSN: 0962-1083
1365-294X
DOI: 10.1111/mec.14245
Popis: Os dados estão depositados em Australian Antarctic Data Centre e disponíveis em https://doi.org/10.4225/15/5955d989a1940 Gelatinous zooplankton are a large component of the animal biomass in all marine environments, but are considered to be uncommon in the diet of most marine top predators. However, the diets of key predator groups like seabirds have conventionally been assessed from stomach content analyses, which cannot detect most gelatinous prey. As marine top predators are used to identify changes in the overall species composition of marine ecosystems, such biases in dietary assessment may impact our detection of important ecosystem regime shifts. We investigated albatross diet using DNA metabarcoding of scats to assess the prevalence of gelatinous zooplankton consumption by two albatross species, one of which is used as an indicator species for ecosystem monitoring. Black-browed and Campbell albatross scats were collected from eight breeding colonies covering the circumpolar range of these birds over two consecutive breeding seasons. Fish was the main dietary item at most sites; however, cnidarian DNA, primarily from scyphozoan jellyfish, was present in 42% of samples overall and up to 80% of samples at some sites. Jellyfish was detected during all breeding stages and consumed by adults and chicks. Trawl fishery catches of jellyfish near the Falkland Islands indicate a similar frequency of jellyfish occurrence in albatross diets in years of high and low jellyfish availability, suggesting jellyfish consumption may be selective rather than opportunistic. Warmer oceans and overfishing of finfish are predicted to favour jellyfish population increases, and we demonstrate here that dietary DNA metabarcoding enables measurements of the contribution of gelatinous zooplankton to the diet of marine predators. Australian Antarctic Science; Winifred Violet Scott Charitable Trust; Fundação para a Ciência e a Tecnologia (FCT) info:eu-repo/semantics/publishedVersion
Databáze: OpenAIRE
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