Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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Record number 412652
Title Demersal fishes from the antarctic shelf and deep sea: A diet study based on fatty acid patterns and gut content analyses
Author(s) Wuerzberg, L.; Peters, J.; Florentino De Souza Silva, A.P.; Brandt, A.
Source Deep-Sea Research. Part II, tropical studies in oceanography 58 (2011)19-20. - ISSN 0967-0645 - p. 2036 - 2042.
Department(s) RIKILT - R&C Diergeneesmiddelen
IMARES Ecosystemen
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) south shetland islands - eastern north pacific - terra-nova bay - feeding-habits - ross sea - trematomus-bernacchii - notothenioid fishes - calanus-propinquus - lipid compositions - calanoides-acutus
Abstract The gut contents and fatty acid composition of 49 fish belonging to five Antarctic demersal families (Nototheniidae, Macrouridae, Channichtyidae, Bathydraconidae and Artedidraconidae) sampled at two stations at the Southern Ocean shelf and deep sea (600 and 2150 m) were analysed in order to identify their main food resource by linking trophic biomarkers with the dietary items found in the fish guts. Main food items of most fish analysed were amphipod crustaceans (e.g. in 63% of Trematomus bernachii guts) and polychaetes (e.g. in 80% of Bathydraco sp. guts), but other food items including fish, other crustaceans and gastropods were also ingested. The most prominent fatty acids found were 20:5(n-3), 16:0, 22:6(n-3) and 18:1(n-9). The results of gut content and fatty acid analyses indicate that all fish except the Channichthyidae share similar food resources irrespective of their depth distribution, i.e. benthic amphipods and polychaetes. A difference of the dietary spectrum can be observed with ontogenetic phases rather than between species, as high values of typical calanoid copepod marker fatty acids as 22:1(n-11) indicate that younger (smaller) specimens include more zooplankton in their diet.
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