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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ftfederationuniv:vital:13411 2023-05-15T13:58:40+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 Trathan, Phil 2018 http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/166143 https://doi.org/10.1007/s00300-018-2364-8 unknown Springer Verlag Polar Biology Vol. 41, no. 11 (2018), p. 2275-2287 http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/166143 vital:13411 https://doi.org/10.1007/s00300-018-2364-8 ISBN:0722-4060 Copyright © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. This metadata is freely available under a CCO license Open Access 06 Biological Sciences Conservation Feeding ecology Prey genetics Pygoscelis papua Southern Ocean Text Journal article 2018 ftfederationuniv https://doi.org/10.1007/s00300-018-2364-8 2022-12-01T18:54:27Z 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 Pygoscelis papua Southern Ocean Federation University Australia: Federation ResearchOnline Antarctic Southern Ocean Polar Biology 41 11 2275 2287 |
institution |
Open Polar |
collection |
Federation University Australia: Federation ResearchOnline |
op_collection_id |
ftfederationuniv |
language |
unknown |
topic |
06 Biological Sciences Conservation Feeding ecology Prey genetics Pygoscelis papua Southern Ocean |
spellingShingle |
06 Biological Sciences Conservation Feeding ecology Prey genetics Pygoscelis papua Southern Ocean Xavier, Jose Cherel, Yves Medeiros, Renata Velez, Nadja Dewar, Meagan Ratcliffe, Norman Carreiro, Ana Trathan, Phil Conventional and molecular analysis of the diet of gentoo penguins: contributions to assess scats for non-invasive penguin diet monitoring |
topic_facet |
06 Biological Sciences Conservation Feeding ecology Prey genetics Pygoscelis papua Southern Ocean |
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 Trathan, Phil |
author_facet |
Xavier, Jose Cherel, Yves Medeiros, Renata Velez, Nadja Dewar, Meagan Ratcliffe, Norman Carreiro, Ana Trathan, Phil |
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 Verlag |
publishDate |
2018 |
url |
http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/166143 https://doi.org/10.1007/s00300-018-2364-8 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Euphausia superba Polar Biology Pygoscelis papua Southern Ocean |
genre_facet |
Antarc* Antarctic Euphausia superba Polar Biology Pygoscelis papua Southern Ocean |
op_relation |
Polar Biology Vol. 41, no. 11 (2018), p. 2275-2287 http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/166143 vital:13411 https://doi.org/10.1007/s00300-018-2364-8 ISBN:0722-4060 |
op_rights |
Copyright © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. This metadata is freely available under a CCO license Open Access |
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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1766267016532983808 |