Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis)

Costa DP, Trillmich F, Croxall JP (1988)
Behavioral Ecology and Sociobiology 22(5): 361-364.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Costa, D. P.; Trillmich, FritzUniBi ; Croxall, J. P.
Abstract / Bemerkung
Intraspecific allometry of pup mass as a function of maternal mass was analysed in Antarctic fur seals (Arctocephalus gazella), a highly dimorphic species. The allometric exponent was 0.6, much lower than in interspecific comparisons. Slopes were the same for mother-son pairs as for mother-daughter pairs, but adjusted means were significantly higher for the former, indicating higher reproductive effort of mothers of sons. The correlation of maternal mass with pup mass explained 59% of the variance in female pup mas but only 18% of that in male pup mass. Females appeared to produce sons which were as big as possible. Relative pup mass decreased with increasing maternal mass indicating a lower reproductive effort of bigger and presumably older mothers, contrary to expectations from life history theory. Sex ratio of pups showed no relation to maternal mass.
Erscheinungsjahr
1988
Zeitschriftentitel
Behavioral Ecology and Sociobiology
Band
22
Ausgabe
5
Seite(n)
361-364
ISSN
0
Page URI
https://pub.uni-bielefeld.de/record/1781884

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Costa DP, Trillmich F, Croxall JP. Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis). Behavioral Ecology and Sociobiology. 1988;22(5):361-364.
Costa, D. P., Trillmich, F., & Croxall, J. P. (1988). Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis). Behavioral Ecology and Sociobiology, 22(5), 361-364. doi:10.1007/BF00295105
Costa, D. P., Trillmich, F., and Croxall, J. P. (1988). Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis). Behavioral Ecology and Sociobiology 22, 361-364.
Costa, D.P., Trillmich, F., & Croxall, J.P., 1988. Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis). Behavioral Ecology and Sociobiology, 22(5), p 361-364.
D.P. Costa, F. Trillmich, and J.P. Croxall, “Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis)”, Behavioral Ecology and Sociobiology, vol. 22, 1988, pp. 361-364.
Costa, D.P., Trillmich, F., Croxall, J.P.: Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis). Behavioral Ecology and Sociobiology. 22, 361-364 (1988).
Costa, D. P., Trillmich, Fritz, and Croxall, J. P. “Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis)”. Behavioral Ecology and Sociobiology 22.5 (1988): 361-364.
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