title: Influence of group size on reproductive success of female ring-tailed lemurs: distinguishing between IGFC and PFC hypotheses.
abstract: Based on data obtained over a period of 11 years from female ring-tailed lemurs (Lemur catta), we analyzed the correlation between group size and female reproductive parameters. The birth rate and mean number of surviving infants 1 year after birth per adult female generated an inverted U-shaped curve when plotted against group size (although not significant) and number of adult female members. Infant mortality rate did not have a consistent correlation with group size and number of adult female members. Thus, our findings were similar to the predictions of Wrangham's inter-group feeding competition hypothesis.
authors.affiliation: School of Policy Studies, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Japan. z96014@ksc.kwansei.ac.jp
authors.forename: Yukio
authors.initials: Y
authors.lastname: Takahata
authors.forename: Naoki
authors.initials: N
authors.lastname: Koyama
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Ichino
authors.forename: Naomi
authors.initials: N
authors.lastname: Miyamoto
authors.forename: Masayuki
authors.initials: M
authors.lastname: Nakamichi
mesh_terms: D000818:Animals; D001723:Birth Rate; D003163:Competitive Behavior; D005260:Female; D007900:Lemur / Q000502:physiology* / Q000523:psychology; D011156:Population Density; D012098:Reproduction / Q000502:physiology*