期刊
SCIENTIFIC REPORTS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep23902
关键词
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资金
- Bureau of Environment
- Tokyo Metropolitan Government
- JSPS KAKENHI Grant [19380112, 2440161, 23310166, 23220006, 25290082, 25118005, 15H05709]
- Cooperation Research Program of the Wildlife Research Center, Kyoto University
- Grants-in-Aid for Scientific Research [25118005, 15H05709, 19380112, 23310166, 16K17367, 16KT0140] Funding Source: KAKEN
Alloparental behaviour and adoption have been reported in many mammals and birds. Such behaviours are energetically costly, and their causes and functions remain unclear. We observed the adoption behaviour of a wild Indo-Pacific bottlenose dolphin (Tursiops aduncus) near Mikura Island, Japan. A calf was seen with its mother on six observation days. Following the mother's death, the calf was observed with a sub-adult female on all 18 observation days from May to September 2012. On three days, the calf was observed swimming with this female in the suckling position and milk was seen leaking from the female's mammary slit. A five-year dataset revealed no significant social or kin relationships between the biological mother and allomother, indicating that kinship and social relationships did not play an important role in the observed adoption.
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