TOOTH WEIGHTS OF JUVENILE MALE NORTHERN FUR SEALS,CALLORHINUS URSINUS
作者:
Jason D. Baker,
Charles W. Fowler,
期刊:
Marine Mammal Science
(WILEY Available online 1990)
卷期:
Volume 6,
issue 1
页码: 32-47
ISSN:0824-0469
年代: 1990
DOI:10.1111/j.1748-7692.1990.tb00224.x
出版商: Blackwell Publishing Ltd
关键词: tooth size;body size;density dependence;northern fur seals;spatial effects
数据来源: WILEY
摘要:
AbstractTooth weight and body length of juvenile male northern fur seals,Callorhinus ursinus, collected on St. Paul Island, Alaska, from 1948 to 1984 were compared. The relationship between these variables was investigated for individual and combined age classes. A density‐dependent increase in mean tooth weight occurred during a decline in fur seal abundance. Consistent, though poorly understood, differences in tooth weight were found among males associated with different rookeries (breeding grounds). Storing the teeth for long periods may affect the weights, but such effects, if any, are too small to account for the changes observe
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