TY  - JOUR
AB  - 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.
DA  - 1988
DO  - 10.1007/BF00295105
LA  - eng
IS  - 5
M2  - 361
PY  - 1988
SN  - 0
SP  - 361-364
T2  - Behavioral Ecology and Sociobiology
TI  - Intraspecific allometry of neonatal size in the antarctic fur seal (Arctocephalus galapagoensis)
UR  - https://nbn-resolving.org/urn:nbn:de:0070-pub-17818843
Y2  - 2024-11-22T08:28:27
ER  -