Diet of six deep‐sea grenadiers (Macrouridae)

Feeding habits of six deep‐sea demersal trawl‐caught macrourids on Chatham Rise, New Zealand, were examined from stomach contents during the austral summer. Three species were predominantly benthic foragers: smallbanded rattail Coelorinchus parvifasciatus on small epifaunal crustaceans, twosaddle ra...

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Bibliographic Details
Published in:Journal of fish biology 2020-01, Vol.96 (1), p.217-229
Main Authors: Stevens, Darren W., Dunn, Matthew R., Pinkerton, Matthew H., Bradford‐Grieve, Janet M.
Format: Article
Language:English
Subjects:
Amphipoda
Animals
Aquatic crustaceans
Aquatic Organisms
Benthos
Blackspot
Caelorinchus biclinozonalis
Caelorinchus matamua
Chatham Rise
Coelorinchus
Copepoda
Coryphaenoides
Coryphaenoides dossenus
Crustacea
Crustaceans
Decapoda
Diet
Feeding Behavior
Fish
Fish Products
Fishes
Foraging
Gadiformes - physiology
Gastrointestinal Contents
Guilds
Lucigadus
macrourid
Marine crustaceans
New Zealand
Seasons
Species
Stomach content
trophic
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Summary:Feeding habits of six deep‐sea demersal trawl‐caught macrourids on Chatham Rise, New Zealand, were examined from stomach contents during the austral summer. Three species were predominantly benthic foragers: smallbanded rattail Coelorinchus parvifasciatus on small epifaunal crustaceans, twosaddle rattail Coelorinchus biclinozonalis on epifaunal decapods and humpback rattail Coryphaenoides dossenus on benthic fishes and epifaunal decapods. Three species were predominantly benthopelagic foragers: banded rattail Coelorinchus fasciatus on hyperiid and gammarid amphipods and calanoid copepods, blackspot rattail Lucigadus nigromaculatus on small epifaunal crustaceans and suprabenthic mysids and Mahia rattail Coelorinchus matamua on epifaunal decapods and calanoid copepods. The most important predictors of diet variability were identified using distance‐based linear models and included areal predictors in C. parvifasciatus, L. nigromaculatus and C. dossenus, fish size in C. dossenus, C. biclinozonalis and C. matamua, sample year in C. biclinozonalis and C. fasciatus and depth in C. matamua. Results are compared with previously published data for four other macrourid species from the same study area. The 10 grenadier species comprise benthic, benthopelagic and mesopelagic foraging guilds. This study brings the number of grenadier species for which diet on Chatham Rise has been described in detail to 12.
ISSN:0022-1112
1095-8649
DOI:10.1111/jfb.14208