Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea
To infer important prey resources for Antarctic toothfish (Dissostichus mawsoni) in the southern Ross Sea, their lipid composition was determined and compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected from the stomachs of toothfish. Stable carbo...
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ftponangunivst:oai:oasis.postech.ac.kr:2014.oak/15325 2023-05-15T13:52:55+02:00 Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea Jo, HS Yeon, I Lim, C Hanchet, SM Lee, DW Kang, CK 창의IT융합공학과 10098613 Kang, CK 2013-09 https://oasis.postech.ac.kr/handle/2014.oak/15325 English eng C C A M L R TI CCAMLR Science 20 21 36 SCI급, SCOPUS 등재논문 SCI Fisheries 1023-4063 2013-OAK-0000028102 https://oasis.postech.ac.kr/handle/2014.oak/15325 15577 CCAMLR Science, v.20, pp.21 - 36 000326924700002 DISSOSTICHUS-MAWSONI FOOD-WEB SHELF FRACTIONATION NOTOTHENIIDAE DELTA-N-15 ECOSYSTEM FISH Article ART 2013 ftponangunivst 2022-10-20T20:09:50Z To infer important prey resources for Antarctic toothfish (Dissostichus mawsoni) in the southern Ross Sea, their lipid composition was determined and compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected from the stomachs of toothfish. Stable carbon and nitrogen isotope ratios were also determined to further identify feeding relationships between these species. The aim of this study was to establish the feasibility of tracking the main dietary items of Antarctic toothfish by comparing results of biomarker analysis and conventional diet analysis. Samples were collected during a longline survey of pre-recruit toothfish in February 2012. Results of fatty acid (FA) and stable isotope analyses from this study provide evidence that a combination of these two techniques can delineate the main prey items of Antarctic toothfish and trophic structure of the toothfish-related fish food web in the southern Ross Sea ecosystem. Similarities in total FA compositions and the FA profiles in muscle tissue of Antarctic toothfish, and Pleuragramma antarcticum, Pogonophryne barsukovi, Dacodraco hunteri and Trematomus loennbergii indicated a trophic connection between toothfish and these fish species. Mean delta N-15 values of Antarctic toothfish were higher than those of P. antarcticum, P. barsukovi and T. loennbergii, indicating a higher trophic position of the toothfish. In contrast, similar delta N-15 values between Antarctic toothfish and icefish (D. hunteri) suggested that they occupy the same trophic position. Overall results of this survey are consistent with the frequency and percentage occurrence of prey in Antarctic toothfish stomachs. Further sample collection and biomarker analyses for more pelagic and benthic biota are needed to better understand the entire food-web structure in the southern Ross Sea. X 1 1 6 scie scopus Article in Journal/Newspaper Antarc* Antarctic Antarctic Toothfish Icefish Ross Sea Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) Antarctic Ross Sea |
institution |
Open Polar |
collection |
Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) |
op_collection_id |
ftponangunivst |
language |
English |
topic |
DISSOSTICHUS-MAWSONI FOOD-WEB SHELF FRACTIONATION NOTOTHENIIDAE DELTA-N-15 ECOSYSTEM FISH |
spellingShingle |
DISSOSTICHUS-MAWSONI FOOD-WEB SHELF FRACTIONATION NOTOTHENIIDAE DELTA-N-15 ECOSYSTEM FISH Jo, HS Yeon, I Lim, C Hanchet, SM Lee, DW Kang, CK Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea |
topic_facet |
DISSOSTICHUS-MAWSONI FOOD-WEB SHELF FRACTIONATION NOTOTHENIIDAE DELTA-N-15 ECOSYSTEM FISH |
description |
To infer important prey resources for Antarctic toothfish (Dissostichus mawsoni) in the southern Ross Sea, their lipid composition was determined and compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected from the stomachs of toothfish. Stable carbon and nitrogen isotope ratios were also determined to further identify feeding relationships between these species. The aim of this study was to establish the feasibility of tracking the main dietary items of Antarctic toothfish by comparing results of biomarker analysis and conventional diet analysis. Samples were collected during a longline survey of pre-recruit toothfish in February 2012. Results of fatty acid (FA) and stable isotope analyses from this study provide evidence that a combination of these two techniques can delineate the main prey items of Antarctic toothfish and trophic structure of the toothfish-related fish food web in the southern Ross Sea ecosystem. Similarities in total FA compositions and the FA profiles in muscle tissue of Antarctic toothfish, and Pleuragramma antarcticum, Pogonophryne barsukovi, Dacodraco hunteri and Trematomus loennbergii indicated a trophic connection between toothfish and these fish species. Mean delta N-15 values of Antarctic toothfish were higher than those of P. antarcticum, P. barsukovi and T. loennbergii, indicating a higher trophic position of the toothfish. In contrast, similar delta N-15 values between Antarctic toothfish and icefish (D. hunteri) suggested that they occupy the same trophic position. Overall results of this survey are consistent with the frequency and percentage occurrence of prey in Antarctic toothfish stomachs. Further sample collection and biomarker analyses for more pelagic and benthic biota are needed to better understand the entire food-web structure in the southern Ross Sea. X 1 1 6 scie scopus |
author2 |
창의IT융합공학과 10098613 Kang, CK |
format |
Article in Journal/Newspaper |
author |
Jo, HS Yeon, I Lim, C Hanchet, SM Lee, DW Kang, CK |
author_facet |
Jo, HS Yeon, I Lim, C Hanchet, SM Lee, DW Kang, CK |
author_sort |
Jo, HS |
title |
Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea |
title_short |
Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea |
title_full |
Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea |
title_fullStr |
Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea |
title_full_unstemmed |
Fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea |
title_sort |
fatty acid and stable isotope analyses to infer diet of antarctic toothfish caught in the southern ross sea |
publisher |
C C A M L R TI |
publishDate |
2013 |
url |
https://oasis.postech.ac.kr/handle/2014.oak/15325 |
geographic |
Antarctic Ross Sea |
geographic_facet |
Antarctic Ross Sea |
genre |
Antarc* Antarctic Antarctic Toothfish Icefish Ross Sea |
genre_facet |
Antarc* Antarctic Antarctic Toothfish Icefish Ross Sea |
op_relation |
CCAMLR Science 20 21 36 SCI급, SCOPUS 등재논문 SCI Fisheries 1023-4063 2013-OAK-0000028102 https://oasis.postech.ac.kr/handle/2014.oak/15325 15577 CCAMLR Science, v.20, pp.21 - 36 000326924700002 |
_version_ |
1766257765966151680 |