Seasonal fluctuations of body condition in northern sika deer on Hokkaido Island, Japan

• Autorzy: Yokoyama M. , Onuma M. , Suzuki M. , Kaji K.
• Języki publikacji: EN

Abstrakty

EN

We analyzed seasonal and sexual fluctuations in kidney mass (KM) and kidney fat mass (KFM) as indices of condition in Hokkaido sika deer Cervus nippon yesoensis Heude, 1884. For 76 male and 132 female sika deer, seasonal fluctuations in KM and KFM were given by fitted sine wave growth curves. Although the kidney fat index (KFI) is used frequently to evaluate animal condition, we reject it because it is based on the assumption that kidney mass is proportional to body mass in all seasons. Our data did not support this assumption. KFM is a better indicator of Hokkaido sika deer condition than KFI. Although sex-based differences in cervid KFM are said to reflect differences in reproductive cycles, the seasonal similarities in sika deer KFM levels may represent adaptations to the long severe Hokkaido winter. Because in our study deer populations were at low densities and had high pregnancy rates, our sine wave growth models can be regarded as reference for fat level fluctuations in Hokkaido sika deer.

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 2001
• Tom: 46
• Numer: 4
• Opis fizyczny: p.419-428,fig.,ref.

Twórcy

autor

Yokoyama M.

• Hokkaido University, Sapporo 060-0818, Japan

autor

Onuma M.

autor

Suzuki M.

autor

Kaji K.

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