Reproductive seasonality in a free-ranging troop of stumptail macaques (Macaca arctoides): A five-year report |
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Authors: | Alejandro Estrada Rosamond Estrada |
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Institution: | (1) Station for Tropical Biology, “Los Tuxtlas” Instituto de Biología, Universidad Nacional Autonoma de México, Apartado Postal 94, San Andrés, Tuxtlas, Veracruz, México |
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Abstract: | Seasonality in births and fertile matings are reported for a stumptail macaque group living on an island for a period of five
years: 1975–1979. During this period 26 births occurred of which 24 represent infants conceived on the island. While births
and fertile matings occurred throughout the year 21% of the births were concentrated in March, 34% in June and July and 17%
in November. Additionally 63% of the births occurred during the rainy season. Of the 24 infants, 4 died during the first year
of life thus yielding a reproductive success of 83%. The sex ratio at birth for the five years was 1:1 corrected to 1:1.2
with the four deaths. The mean interval between fertile matings for females was 19 months and 2 days and the mean age for
first conception was 4 years and 5 months. The pattern of birth and breeding seasonality was markedly similar to that of the
parent troop while in Puerto Rico. |
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Keywords: | |
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