Risk-taking behavior of bull-headed shrikes that recently colonized islands
Individuals which have invaded urbanized environments are reported to engage in riskier behaviors, possibly influenced by the scarcity of predators in urbanized areas. Here, we studied the risk-taking behavior of birds which had invaded a new natural environment, rather than an artificial urban envi...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8026151/ http://www.ncbi.nlm.nih.gov/pubmed/33854535 https://doi.org/10.1093/cz/zoaa036 |
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ftpubmed:oai:pubmedcentral.nih.gov:8026151 2023-05-15T18:05:18+02:00 Risk-taking behavior of bull-headed shrikes that recently colonized islands Hamao, Shoji Torikai, Hisahiro Yoshikawa, Midori Yamamoto, Yutaka Ijichi, Tugeru 2021-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8026151/ http://www.ncbi.nlm.nih.gov/pubmed/33854535 https://doi.org/10.1093/cz/zoaa036 en eng Oxford University Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8026151/ http://www.ncbi.nlm.nih.gov/pubmed/33854535 http://dx.doi.org/10.1093/cz/zoaa036 © The Author(s) (2020). Published by Oxford University Press on behalf of Editorial Office, Current Zoology. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com CC-BY-NC Curr Zool Articles Text 2021 ftpubmed https://doi.org/10.1093/cz/zoaa036 2021-04-18T00:29:20Z Individuals which have invaded urbanized environments are reported to engage in riskier behaviors, possibly influenced by the scarcity of predators in urbanized areas. Here, we studied the risk-taking behavior of birds which had invaded a new natural environment, rather than an artificial urban environment, using recently established populations of the bull-headed shrike Lanius bucephalus, which naturally colonized three subtropical islands in Japan. We compared flight initiation distance (FID), the distance at which an individual approached by a human initiates flight, between the islands and the temperate mainland. FID was longer for the insular shrikes compared with the mainland shrikes after controlling for other factors, indicating that the individuals which had invaded a new natural environment had a lower propensity for risk-taking. A possible explanation for these results is that low risk-taking behavior might be adaptive on the islands due to predation by the black rat Rattus rattus, an unfamiliar predator not found in shrike habitats on the temperate mainland. Further studies are needed to examine the nest predation rate, predator species, and nest site selection of these insular shrike populations. Text Rattus rattus PubMed Central (PMC) Fid ENVELOPE(-65.939,-65.939,-68.664,-68.664) Fid The ENVELOPE(-65.939,-65.939,-68.664,-68.664) Current Zoology 67 2 177 182 |
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Articles Hamao, Shoji Torikai, Hisahiro Yoshikawa, Midori Yamamoto, Yutaka Ijichi, Tugeru Risk-taking behavior of bull-headed shrikes that recently colonized islands |
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Articles |
description |
Individuals which have invaded urbanized environments are reported to engage in riskier behaviors, possibly influenced by the scarcity of predators in urbanized areas. Here, we studied the risk-taking behavior of birds which had invaded a new natural environment, rather than an artificial urban environment, using recently established populations of the bull-headed shrike Lanius bucephalus, which naturally colonized three subtropical islands in Japan. We compared flight initiation distance (FID), the distance at which an individual approached by a human initiates flight, between the islands and the temperate mainland. FID was longer for the insular shrikes compared with the mainland shrikes after controlling for other factors, indicating that the individuals which had invaded a new natural environment had a lower propensity for risk-taking. A possible explanation for these results is that low risk-taking behavior might be adaptive on the islands due to predation by the black rat Rattus rattus, an unfamiliar predator not found in shrike habitats on the temperate mainland. Further studies are needed to examine the nest predation rate, predator species, and nest site selection of these insular shrike populations. |
format |
Text |
author |
Hamao, Shoji Torikai, Hisahiro Yoshikawa, Midori Yamamoto, Yutaka Ijichi, Tugeru |
author_facet |
Hamao, Shoji Torikai, Hisahiro Yoshikawa, Midori Yamamoto, Yutaka Ijichi, Tugeru |
author_sort |
Hamao, Shoji |
title |
Risk-taking behavior of bull-headed shrikes that recently colonized islands |
title_short |
Risk-taking behavior of bull-headed shrikes that recently colonized islands |
title_full |
Risk-taking behavior of bull-headed shrikes that recently colonized islands |
title_fullStr |
Risk-taking behavior of bull-headed shrikes that recently colonized islands |
title_full_unstemmed |
Risk-taking behavior of bull-headed shrikes that recently colonized islands |
title_sort |
risk-taking behavior of bull-headed shrikes that recently colonized islands |
publisher |
Oxford University Press |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8026151/ http://www.ncbi.nlm.nih.gov/pubmed/33854535 https://doi.org/10.1093/cz/zoaa036 |
long_lat |
ENVELOPE(-65.939,-65.939,-68.664,-68.664) ENVELOPE(-65.939,-65.939,-68.664,-68.664) |
geographic |
Fid Fid The |
geographic_facet |
Fid Fid The |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_source |
Curr Zool |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8026151/ http://www.ncbi.nlm.nih.gov/pubmed/33854535 http://dx.doi.org/10.1093/cz/zoaa036 |
op_rights |
© The Author(s) (2020). Published by Oxford University Press on behalf of Editorial Office, Current Zoology. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) ), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1093/cz/zoaa036 |
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Current Zoology |
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67 |
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2 |
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177 |
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182 |
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