| Autor: |
Pitcher, K. W., Pendleton, G. W., Calkins, D. G. |
| Předmět: |
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| Zdroj: |
Marine Mammal Science; Apr2000, Vol. 16 Issue 2, p427, 0p |
| Abstrakt: |
We evaluated various measurements of mass, morphology, and blubber thickness as indices of fatness for Steller sea lions by correlation with the percentage of total body mass comprised by the sculp (%SCULP). We concluded LMD-index was the best index evaluated because it had a relatively high r2 (0.58), had a linear relationship with %SCULP, and the intercept term was not different from 0. We suggestthe development of a LMD-index for otariids would likely reduce the unexplained variation in the index. We developed a multiple regression model (r2 = 0.745, P < 0.001) for predicting %SCULP withLMD-index and functions of sex, age, and season as predictor variables. Steller sea lions <5 yr of age had higher %SCULP values than those >/=5 yr. %SCULP declined with age for sea lions <5 yr. Both youngerand older males were fatter during the winter/spring period than during summer/ fall. Females of both age classes had similar %SCULP values throughout the year. Steller sea lions are relatively lean pinnipeds; estimates of blubber and total body lipids ranged from 5% to 17% of total body mass. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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