Diet composition and trophic levels of marine mammals | Zendy

Daniel Pauly | Zendy; Andrew W. Trites | Zendy; E. Capuli | Zendy; Villy Christensen | Zendy

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Diet composition and trophic levels of marine mammals

Author(s) -

Daniel Pauly,

Andrew W. Trites,

E. Capuli,

Villy Christensen

Publication year - 1998

Publication title -

ices journal of marine science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.348

H-Index - 117

eISSN - 1095-9289

pISSN - 1054-3139

DOI - 10.1006/jmsc.1997.0280

Subject(s) - trophic level , mesopelagic zone , pelagic zone , invertebrate , biology , zooplankton , gelatinous zooplankton , baleen , benthic zone , marine ecosystem , predation , ecology , isotope analysis , mesopredator release hypothesis , fishery , apex predator , ecosystem , whale

Standardized diet compositions were derived for 97 species of marine mammals from published accounts of stomach contents as well as from morphological, behavioural and other information. Diet was apportioned among eight categories of prey types (benthic invertebrates, large zooplankton, small squids, large squids, small pelagic fishes, mesopelagic fishes, miscellaneous fishes and higher invertebrates). Trophic levels were estimated for each species of marine mammals and compared with published estimates derived using stable isotope ratios. Trophic levels ranged from 3.2-3.4 in baleen whales and sea otters, to 3.8-4.4 in most pinnipeds and odontocete whales, to 4.5-4.6 in killer whales. Such information can be used for ecosystem modelling and related studies.

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