MASS CHANGE IN FASTING IMMATURE MALE NORTHERN FUR SEALS

被引:9
作者
BAKER, JD
FOWLER, CW
ANTONELIS, GA
机构
关键词
D O I
10.1139/z94-045
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Immature male northern fur seals (Callorhinus ursinus) lost an estimated 20-30% of their body mass while fasting during the breeding season on St. Paul Island, Alaska. This is somewhat less than the mass loss reported for territorial adult male pinnipeds. During fasting, absolute rates of mass change (averaging -0.68 kg.day(-1)) were positively correlated with initial mass. Mass-specific rate of change (averaging 2%.day(-1)) did not vary with age or initial mass. Although they lose large amounts of mass while fasting, immature male fur seals achieve a net increase in mass during the breeding season by making feeding trips to sea. We postulate that the capability for prolonged fasting in immature males facilitates the development of social and sexual skills that are Likely to increase future reproductive success.
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页码:326 / 329
页数:4
相关论文
共 29 条
[1]   GREY SEAL MALES - ENERGETIC AND BEHAVIORAL LINKS BETWEEN SIZE AND SEXUAL SUCCESS [J].
ANDERSON, SS ;
FEDAK, MA .
ANIMAL BEHAVIOUR, 1985, 33 (AUG) :829-838
[2]  
ANTONELIS G, 1992, NOAA NMFSFNWC214 TEC
[3]  
BIGG MA, 1986, FISH B-NOAA, V84, P383
[4]   MASS CHANGES AND METABOLISM IN TERRITORIAL-MALE ANTARCTIC FUR SEALS (ARCTOCEPHALUS-GAZELLA) [J].
BOYD, IL ;
DUCK, CD .
PHYSIOLOGICAL ZOOLOGY, 1991, 64 (01) :375-392
[5]  
CAHILL GF, 1970, ADIPOSE TISSUE REGUL, P181
[6]   PUP ABDUCTION AND INFANTICIDE IN SOUTHERN SEA LIONS [J].
CAMPAGNA, C ;
LEBOEUF, BJ ;
CAPPOZZO, HL .
BEHAVIOUR, 1988, 107 :44-60
[7]   THE BIOCHEMISTRY OF NATURAL FASTING AT ITS LIMITS [J].
CASTELLINI, MA ;
REA, LD .
EXPERIENTIA, 1992, 48 (06) :575-582
[8]  
CHELNOKOV FG, 1974, ISSLEDOVANIYA BIOL R, V5, P137
[9]  
Cox C.R., 1983, P89
[10]   REPRODUCTIVE EFFORT OF MALE NORTHERN ELEPHANT SEALS - ESTIMATES FROM MASS-LOSS [J].
DEUTSCH, CJ ;
HALEY, MP ;
LEBOEUF, BJ .
CANADIAN JOURNAL OF ZOOLOGY, 1990, 68 (12) :2580-2593