Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring
There is a growing search for less invasive methods while studying the diet of Antarctic animals in the wild. Therefore, we compared the diet of gentoo penguins from stomach contents (i.e. through visual identification of prey remains) and scats (i.e. faeces), and further compared prey DNA assay in...
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ftnerc:oai:nora.nerc.ac.uk:520420 2023-05-15T13:49:35+02:00 Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring Xavier, Jose Cherel, Yves Medeiros, Renata Velez, Nadja Dewar, Meagan Ratcliffe, Norman Carreiro, Ana R Trathan, Phil N. 2018-11 text http://nora.nerc.ac.uk/id/eprint/520420/ https://nora.nerc.ac.uk/id/eprint/520420/1/Paper%20penguins%20diet%20methods_REVISED.docx https://doi.org/10.1007/s00300-018-2364-8 en eng Springer https://nora.nerc.ac.uk/id/eprint/520420/1/Paper%20penguins%20diet%20methods_REVISED.docx Xavier, Jose orcid:0000-0002-9621-6660 Cherel, Yves; Medeiros, Renata; Velez, Nadja; Dewar, Meagan; Ratcliffe, Norman orcid:0000-0002-3375-2431 Carreiro, Ana R; Trathan, Phil N. orcid:0000-0001-6673-9930 . 2018 Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring. Polar Biology, 41 (11). 2275-2287. https://doi.org/10.1007/s00300-018-2364-8 <https://doi.org/10.1007/s00300-018-2364-8> Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1007/s00300-018-2364-8 2023-02-04T19:46:47Z There is a growing search for less invasive methods while studying the diet of Antarctic animals in the wild. Therefore, we compared the diet of gentoo penguins from stomach contents (i.e. through visual identification of prey remains) and scats (i.e. faeces), and further compared prey DNA assay in fresh and old scats. Prey remains identified visually in stomach contents and scats were broadly comparable: the crustaceans and fish were the most important components, with Themisto gaudichaudii clearly being the most frequent and numerous prey species in both sampling methods. By mass, differences in species frequency were observed in stomach contents (Parachaenichthys georgianus) and scats (Champsocephalus gunnari), with the former fish species absent in scats. Differences were detected in the most frequent prey (T. gaudichaudii and Euphausia superba) and in various fish species, most with bigger sizes in scats. Allometric equations to estimate most crustacean’s sizes (i.e. relationships between carapace and mass/total length) are needed. For DNA studies, when comparing DNA from fresh and old scats, both provided similar results that, in general, were also similar to the visual analysis. In order to use penguin scats (along with the use of DNA analyses) for monitoring purposes, allometric equations to estimate mass and size of prey (most crustaceans) and better designed species-specific primers are needed for targeting key prey species (e.g. Euphausia superba, T. gaudichaudii). These DNA methodologies can complement other methods (i.e. visual analyses and stomach contents analyses) in monitoring programs of penguins. Article in Journal/Newspaper Antarc* Antarctic Euphausia superba Polar Biology Natural Environment Research Council: NERC Open Research Archive Antarctic Polar Biology 41 11 2275 2287 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
There is a growing search for less invasive methods while studying the diet of Antarctic animals in the wild. Therefore, we compared the diet of gentoo penguins from stomach contents (i.e. through visual identification of prey remains) and scats (i.e. faeces), and further compared prey DNA assay in fresh and old scats. Prey remains identified visually in stomach contents and scats were broadly comparable: the crustaceans and fish were the most important components, with Themisto gaudichaudii clearly being the most frequent and numerous prey species in both sampling methods. By mass, differences in species frequency were observed in stomach contents (Parachaenichthys georgianus) and scats (Champsocephalus gunnari), with the former fish species absent in scats. Differences were detected in the most frequent prey (T. gaudichaudii and Euphausia superba) and in various fish species, most with bigger sizes in scats. Allometric equations to estimate most crustacean’s sizes (i.e. relationships between carapace and mass/total length) are needed. For DNA studies, when comparing DNA from fresh and old scats, both provided similar results that, in general, were also similar to the visual analysis. In order to use penguin scats (along with the use of DNA analyses) for monitoring purposes, allometric equations to estimate mass and size of prey (most crustaceans) and better designed species-specific primers are needed for targeting key prey species (e.g. Euphausia superba, T. gaudichaudii). These DNA methodologies can complement other methods (i.e. visual analyses and stomach contents analyses) in monitoring programs of penguins. |
format |
Article in Journal/Newspaper |
author |
Xavier, Jose Cherel, Yves Medeiros, Renata Velez, Nadja Dewar, Meagan Ratcliffe, Norman Carreiro, Ana R Trathan, Phil N. |
spellingShingle |
Xavier, Jose Cherel, Yves Medeiros, Renata Velez, Nadja Dewar, Meagan Ratcliffe, Norman Carreiro, Ana R Trathan, Phil N. Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
author_facet |
Xavier, Jose Cherel, Yves Medeiros, Renata Velez, Nadja Dewar, Meagan Ratcliffe, Norman Carreiro, Ana R Trathan, Phil N. |
author_sort |
Xavier, Jose |
title |
Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
title_short |
Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
title_full |
Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
title_fullStr |
Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
title_full_unstemmed |
Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
title_sort |
conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
publisher |
Springer |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/520420/ https://nora.nerc.ac.uk/id/eprint/520420/1/Paper%20penguins%20diet%20methods_REVISED.docx https://doi.org/10.1007/s00300-018-2364-8 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Euphausia superba Polar Biology |
genre_facet |
Antarc* Antarctic Euphausia superba Polar Biology |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520420/1/Paper%20penguins%20diet%20methods_REVISED.docx Xavier, Jose orcid:0000-0002-9621-6660 Cherel, Yves; Medeiros, Renata; Velez, Nadja; Dewar, Meagan; Ratcliffe, Norman orcid:0000-0002-3375-2431 Carreiro, Ana R; Trathan, Phil N. orcid:0000-0001-6673-9930 . 2018 Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring. Polar Biology, 41 (11). 2275-2287. https://doi.org/10.1007/s00300-018-2364-8 <https://doi.org/10.1007/s00300-018-2364-8> |
op_doi |
https://doi.org/10.1007/s00300-018-2364-8 |
container_title |
Polar Biology |
container_volume |
41 |
container_issue |
11 |
container_start_page |
2275 |
op_container_end_page |
2287 |
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1766251791380381696 |