Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis
Competition between Kuril harbor seals (Phoca vitulina stejnegeri) and salmon set-net fishing industries has become a serious problem with the recent increase in the number of seals in Erimo, Hokkaido, Japan. We aimed to understand the detailed dietary structure of Kuril harbor seals focusing on int...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/86359 2023-11-12T04:24:39+01:00 Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis Jimbo, Mina Kita, Yuki F. Kobayashi, Mari Mitani, Yoko http://hdl.handle.net/2115/86359 https://doi.org/10.1007/s13364-021-00586-3 eng eng Springer http://hdl.handle.net/2115/86359 Mammal Research, 66(4): 553-563 http://dx.doi.org/10.1007/s13364-021-00586-3 This is a post-peer-review, pre-copyedit version of an article published in Mammal Research. The final authenticated version is available online at: https://dx.doi.org/10.1007/s13364-021-00586-3 Mitochondrial COI NGS Food habit Seal-fishery conflict 460 article (author version) fthokunivhus https://doi.org/10.1007/s13364-021-00586-3 2023-10-13T00:06:55Z Competition between Kuril harbor seals (Phoca vitulina stejnegeri) and salmon set-net fishing industries has become a serious problem with the recent increase in the number of seals in Erimo, Hokkaido, Japan. We aimed to understand the detailed dietary structure of Kuril harbor seals focusing on intraspecific differences and verify whether "problem seals" who habitually use salmon set-nets could be characterized by intrinsic factors such as sex and maturity. We estimated the diet of Kuril harbor seals in two fishing seasons using DNA barcoding diet analysis on colon contents and verified intraspecific differences in their diet. In spring, their diets showed different tendencies between maturity stage; each adult seal fed on different prey items, suggesting that they avoid the intraspecies competition over food during the breeding season. Additionally, it was implied that some adult females habitually stole from salmon set-nets. Our dietary analysis showed dietary changes of Kuril harbor seals with different tendencies depending on maturity or sex, suggesting that problem individuals who habitually use set-nets can be characterized by intrinsic factors. This detailed dietary information can offer an accurate assessment of seal predation effects on fishing targets and the selective management of Kuril harbor seals, especially in mitigating seal-commercial fishery conflicts. Article in Journal/Newspaper Phoca vitulina Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Mammal Research 66 4 553 563 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
Mitochondrial COI NGS Food habit Seal-fishery conflict 460 |
spellingShingle |
Mitochondrial COI NGS Food habit Seal-fishery conflict 460 Jimbo, Mina Kita, Yuki F. Kobayashi, Mari Mitani, Yoko Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis |
topic_facet |
Mitochondrial COI NGS Food habit Seal-fishery conflict 460 |
description |
Competition between Kuril harbor seals (Phoca vitulina stejnegeri) and salmon set-net fishing industries has become a serious problem with the recent increase in the number of seals in Erimo, Hokkaido, Japan. We aimed to understand the detailed dietary structure of Kuril harbor seals focusing on intraspecific differences and verify whether "problem seals" who habitually use salmon set-nets could be characterized by intrinsic factors such as sex and maturity. We estimated the diet of Kuril harbor seals in two fishing seasons using DNA barcoding diet analysis on colon contents and verified intraspecific differences in their diet. In spring, their diets showed different tendencies between maturity stage; each adult seal fed on different prey items, suggesting that they avoid the intraspecies competition over food during the breeding season. Additionally, it was implied that some adult females habitually stole from salmon set-nets. Our dietary analysis showed dietary changes of Kuril harbor seals with different tendencies depending on maturity or sex, suggesting that problem individuals who habitually use set-nets can be characterized by intrinsic factors. This detailed dietary information can offer an accurate assessment of seal predation effects on fishing targets and the selective management of Kuril harbor seals, especially in mitigating seal-commercial fishery conflicts. |
format |
Article in Journal/Newspaper |
author |
Jimbo, Mina Kita, Yuki F. Kobayashi, Mari Mitani, Yoko |
author_facet |
Jimbo, Mina Kita, Yuki F. Kobayashi, Mari Mitani, Yoko |
author_sort |
Jimbo, Mina |
title |
Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis |
title_short |
Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis |
title_full |
Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis |
title_fullStr |
Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis |
title_full_unstemmed |
Intraspecific differences in the diet of Kuril harbor seals (Phoca vitulina stejnegeri) in Erimo, Hokkaido, using DNA barcoding diet analysis |
title_sort |
intraspecific differences in the diet of kuril harbor seals (phoca vitulina stejnegeri) in erimo, hokkaido, using dna barcoding diet analysis |
publisher |
Springer |
url |
http://hdl.handle.net/2115/86359 https://doi.org/10.1007/s13364-021-00586-3 |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_relation |
http://hdl.handle.net/2115/86359 Mammal Research, 66(4): 553-563 http://dx.doi.org/10.1007/s13364-021-00586-3 |
op_rights |
This is a post-peer-review, pre-copyedit version of an article published in Mammal Research. The final authenticated version is available online at: https://dx.doi.org/10.1007/s13364-021-00586-3 |
op_doi |
https://doi.org/10.1007/s13364-021-00586-3 |
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Mammal Research |
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66 |
container_issue |
4 |
container_start_page |
553 |
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563 |
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1782339136179404800 |