Site-specific reproductive failure and decline of a population of the Endangered yellow-eyed penguin: a case for foraging habitat quality
| العنوان: | Site-specific reproductive failure and decline of a population of the Endangered yellow-eyed penguin: a case for foraging habitat quality |
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| المؤلفون: | J. B. Wright, S. J. Murray, J. E. van der Lubbe, M. L. Dobbins, Julie C. McInnes, G. A. Harper, S. D. King |
| المصدر: | Marine Ecology Progress Series. 467:233-244 |
| بيانات النشر: | Inter-Research Science Center, 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | education.field_of_study, Ecology, Population, Endangered species, Introduced species, Aquatic Science, Biology, biology.organism_classification, Population decline, Animal ecology, Threatened species, Feral cat, Megadyptes antipodes, education, Ecology, Evolution, Behavior and Systematics |
| الوصف: | Sub-populations within species can exhibit differing population growth trajectories in relation to one another depending on various environmental factors. In threatened species, neg- ative population growth in some sub-populations can ultimately cause the demise of the species; therefore, understanding causal factors of population change is critical to inform management aimed at reversing population declines. Feral house cats Felis catus are potential predators of Endangered yellow-eyed penguins Megadyptes antipodes and were considered the principal causal factor in the species' decline on Stewart Island/Rakiura, New Zealand. The number of yellow-eyed penguins breeding on Stewart Island is low relative to the number on close outlying islands, where cats are absent, and a census had recorded few juveniles on Stewart Island, sug- gesting poor reproductive success. Yellow-eyed penguin breeding attempts on the northern coast of Stewart Island and outlying islands were monitored for 5 yr, but predation by cats was not evi- dent. Instead, disease, probably aggravated by starvation and poor dietary provisioning, was found to be a significant cause of chick mortality on Stewart Island. Reproductive success was con- sistently low there (0�33%), in contrast to outlying islands (27�76%). Little recruitment was recorded on Stewart Island, and the number of breeding pairs on the northern coast of Stewart Island declined by 27% between 1999 and 2008. Factors unique to the north coast of Stewart Island are believed to be adversely affecting nesting yellow-eyed penguins, as a similar decline was not recorded elsewhere on the island or on outlying islands. |
| تدمد: | 1616-1599 0171-8630 |
| DOI: | 10.3354/meps09969 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9b582fcccb8973509e9b5ef5ac8ada6f https://doi.org/10.3354/meps09969 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........9b582fcccb8973509e9b5ef5ac8ada6f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16161599 01718630 |
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| DOI: | 10.3354/meps09969 |