Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis)
The Saimaa ringed seal (Pusa hispida saimensis) is one of the few freshwater seal populations worldwide. The major conservation issue of this critically endangered population is bycatch mortality. We used digestive tract content and stable isotopes (d13C and d15N) to estimate the diet and seasonal f...
Published in: | Marine Mammal Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley-Blackwell Publishing
2015
|
Subjects: | |
Online Access: | http://urn.fi/URN:NBN:fi:jyu-201412293581 |
id |
ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/45103 |
---|---|
record_format |
openpolar |
spelling |
ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/45103 2024-02-04T10:04:06+01:00 Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis) Auttila, Miina Sinisalo, Tuula Valtonen, Mia Niemi, Marja Viljanen, Markku Kurkilahti, Mika Kunnasranta, Mervi 2015 45-65 application/pdf http://urn.fi/URN:NBN:fi:jyu-201412293581 eng eng Wiley-Blackwell Publishing Marine Mammal Science 0824-0469 1 31 10.1111/mms.12133 Auttila, M., Sinisalo, T., Valtonen, M., Niemi, M., Viljanen, M., Kurkilahti, M., & Kunnasranta, M. (2015). Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis). Marine Mammal Science , 31 (1), 45-65. https://doi.org/10.1111/mms.12133 CONVID_23672376 TUTKAID_61837 URN:NBN:fi:jyu-201412293581 http://urn.fi/URN:NBN:fi:jyu-201412293581 © 2014 Society for Marine Mammalogy. This is an author's final draft version of an article whose final and definitive form has been published by Society for Marine Mammalogy (Wiley). Published in this repository with the kind permission of the publisher. openAccess Phoca stable isotopes digestive tract analysis seal-fishery interaction nutritional status conservation,Saimaa ringed seal article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 acceptedVersion A1 2015 ftjyvaeskylaenun 2024-01-11T00:02:51Z The Saimaa ringed seal (Pusa hispida saimensis) is one of the few freshwater seal populations worldwide. The major conservation issue of this critically endangered population is bycatch mortality. We used digestive tract content and stable isotopes (d13C and d15N) to estimate the diet and seasonal feeding patterns for gaining better understanding of the seals feeding habits and potential conservation implications. The diet was similar across age groups. Altogether 15 fish species were identified and the most important were smelt (Osmerus eperlanus), ruff (Gymnocephalus cernuus), perch (Perca fluviatilis), vendace (Coregonus albula) and cyprinids. The high d15N values suggested that the seals lose weight during winter and spring. Additionally the drop in d15N values indicated that pups start to recover from postweaning stress and gain weight around the age of 6 mo. The isotope values differed regionally, which emphasizes that samples from consumers and prey should be collected from the same regions to improve interpretation of the stable isotopic results. Overall, diet composition suggests minimal to nonexistent competition with commercial or recreational fishing. However, observed weight loss of pups during summer may be related to higher risk of bycatch and this should be taken into account when planning temporal fishing closures. peerReviewed Article in Journal/Newspaper Pusa hispida ringed seal Gymnocephalus cernuus Ruff JYX - Jyväskylä University Digital Archive Marine Mammal Science 31 1 45 65 |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
Phoca stable isotopes digestive tract analysis seal-fishery interaction nutritional status conservation,Saimaa ringed seal |
spellingShingle |
Phoca stable isotopes digestive tract analysis seal-fishery interaction nutritional status conservation,Saimaa ringed seal Auttila, Miina Sinisalo, Tuula Valtonen, Mia Niemi, Marja Viljanen, Markku Kurkilahti, Mika Kunnasranta, Mervi Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis) |
topic_facet |
Phoca stable isotopes digestive tract analysis seal-fishery interaction nutritional status conservation,Saimaa ringed seal |
description |
The Saimaa ringed seal (Pusa hispida saimensis) is one of the few freshwater seal populations worldwide. The major conservation issue of this critically endangered population is bycatch mortality. We used digestive tract content and stable isotopes (d13C and d15N) to estimate the diet and seasonal feeding patterns for gaining better understanding of the seals feeding habits and potential conservation implications. The diet was similar across age groups. Altogether 15 fish species were identified and the most important were smelt (Osmerus eperlanus), ruff (Gymnocephalus cernuus), perch (Perca fluviatilis), vendace (Coregonus albula) and cyprinids. The high d15N values suggested that the seals lose weight during winter and spring. Additionally the drop in d15N values indicated that pups start to recover from postweaning stress and gain weight around the age of 6 mo. The isotope values differed regionally, which emphasizes that samples from consumers and prey should be collected from the same regions to improve interpretation of the stable isotopic results. Overall, diet composition suggests minimal to nonexistent competition with commercial or recreational fishing. However, observed weight loss of pups during summer may be related to higher risk of bycatch and this should be taken into account when planning temporal fishing closures. peerReviewed |
format |
Article in Journal/Newspaper |
author |
Auttila, Miina Sinisalo, Tuula Valtonen, Mia Niemi, Marja Viljanen, Markku Kurkilahti, Mika Kunnasranta, Mervi |
author_facet |
Auttila, Miina Sinisalo, Tuula Valtonen, Mia Niemi, Marja Viljanen, Markku Kurkilahti, Mika Kunnasranta, Mervi |
author_sort |
Auttila, Miina |
title |
Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis) |
title_short |
Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis) |
title_full |
Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis) |
title_fullStr |
Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis) |
title_full_unstemmed |
Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis) |
title_sort |
diet composition and seasonal feeding patterns of a freshwater ringed seal (pusa hispida saimensis) |
publisher |
Wiley-Blackwell Publishing |
publishDate |
2015 |
url |
http://urn.fi/URN:NBN:fi:jyu-201412293581 |
genre |
Pusa hispida ringed seal Gymnocephalus cernuus Ruff |
genre_facet |
Pusa hispida ringed seal Gymnocephalus cernuus Ruff |
op_relation |
Marine Mammal Science 0824-0469 1 31 10.1111/mms.12133 Auttila, M., Sinisalo, T., Valtonen, M., Niemi, M., Viljanen, M., Kurkilahti, M., & Kunnasranta, M. (2015). Diet composition and seasonal feeding patterns of a freshwater ringed seal (Pusa hispida saimensis). Marine Mammal Science , 31 (1), 45-65. https://doi.org/10.1111/mms.12133 CONVID_23672376 TUTKAID_61837 URN:NBN:fi:jyu-201412293581 http://urn.fi/URN:NBN:fi:jyu-201412293581 |
op_rights |
© 2014 Society for Marine Mammalogy. This is an author's final draft version of an article whose final and definitive form has been published by Society for Marine Mammalogy (Wiley). Published in this repository with the kind permission of the publisher. openAccess |
container_title |
Marine Mammal Science |
container_volume |
31 |
container_issue |
1 |
container_start_page |
45 |
op_container_end_page |
65 |
_version_ |
1789972088368398336 |