Distribution, growth, diet and foraging behaviour of the yellow-fin notothen Patagonotothen guntheri (Norman)on the Shag Rocks shelf (Southern Ocean)

Collins, M.A. ORCID: https://orcid.org/0000-0001-7132-8650; Shreeve, R.S.; Fielding, S. ORCID: https://orcid.org/0000-0002-3152-4742; Thurston, M.H.. 2008 Distribution, growth, diet and foraging behaviour of the yellow-fin notothen Patagonotothen guntheri (Norman)on the Shag Rocks shelf (Southern Ocean). Journal of Fish Biology, 72 (1). 271-286. https://doi.org/10.1111/j.1095-8649.2007.01711.x

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Abstract/Summary

The distribution, total length (L-T) frequency and diet of Patagonotothen guntheri are described from 14 bottom trawl surveys conducted on the Shag Rocks and South Georgia shelves in the austral summers from 1986 to 2006. Patagonotothen guntheri (80-265 mm L-T) were caught on the Shag Rocks shelf from depths of 111 to 470 m, but no specimens were caught on the South Georgia shelf. Multiple cohorts were present during each survey and L-T-frequency analysis of these cohorts suggests that growth was slow (von Bertalanffy K = 0.133). Evidence from stomach contents and acoustic data (2005 and 2006) showed that P. guntheri is primarily a pelagic feeder, migrating from the sea floor towards the surface to feed during daylight. The diet of smaller fish (< 140 mm) was dominated by copepods, predominantly Rhincalanus gigas, whilst larger fish principally consumed the pelagic hyperiid amphipod, Themisto gaudichaudii and Antarctic krill Euphausia superba. Some larger fish also took benthic prey. (C) 2008 The Authors Journal compilation (C) 2008 The Fisheries Society of the British Isles.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1111/j.1095-8649.2007.01711.x
Programmes:	BAS Programmes > Global Science in the Antarctic Context (2005-2009) > DISCOVERY 2010 - Integrating Southern Ocean Ecosystems into the Earth System NOC Programmes
ISSN:	0022-1112
Additional Keywords:	growth; notothenid; Patagonian toothfish; South Georgia; Southern Ocean; total length frequency
NORA Subject Terms:	Marine Sciences Zoology Biology and Microbiology Ecology and Environment
Date made live:	12 Jan 2011 16:18 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/11435

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