Browsing Department of Zoology by Author "Onyango, Patrick O"
Now showing items 1-7 of 7
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Balance of investment between parental care and mating effort in male baboons
Onyango, Patrick O (2011)Non-monogamous males that provide care to their offspring face a potential conflict in investment between paternal care and mating effort. This conflict arises either because of resource or temporal constraints. I ... -
Demography of a population with a long history of poaching and the utility of the individual identification technique as a tool for monitoring intermittently studied elephant populations
Onyango, Patrick O; Lesowapir, Bernard (2016-09-01)In many elephant populations in Africa, adverse effects of poaching including altered age and sex structure and long calving intervals continue to negatively impact the rate of recovery. The study reported here characterized ... -
Hormonal correlates of natal dispersal and rank attainment in wild male baboons
Onyango, Patrick O; Akinyi, Mercy Y; Gesquiere, Laurence R; Franz, Mathias; Altmann, Jeanne; Alberts, Susan C (Academic Press, 2017-08-01)In many mammals, maturational milestones such as dispersal and the attainment of adult dominance rank mark stages in the onset of reproductive activity and depend on a coordinated set of hormonal and socio-behavioral ... -
Life history context of reproductive aging in a wild primate model
Onyango, Patrick O; Altmann, Jeanne; Gesquiere, Laurence; Galbany, Jordi; Alberts, Susan C (Blackwell Publishing Inc, 2010-08-01)The pace of reproductive aging has been of considerable interest, especially in regard to the long postreproductive period in modern women. Here we use data for both sexes from a 37‐year longitudinal study of a wild baboon ... -
Persistence of maternal effects in baboons: Mother's dominance rank at son's conception predicts stress hormone levels in subadult males
Onyango, Patrick O; Gesquiere, Laurence R; Wango, Emmanuel O; Alberts, Susan C; Altmann, Jeanne (Academic Press, 2008-07-01)Dominance status and reproductive experience are maternal characteristics that affect offspring traits in diverse taxa, including some cercopithecine primates. Maternal effects of this sort are widespread and are sources ... -
Puberty and dispersal in a wild primate population
Onyango, Patrick O; Gesquiere, Laurence R; Altmann, Jeanne; Alberts, Susan C (Academic Press, 2013-07-01)This article is part of a Special Issue “Puberty and Adolescence”. The onset of reproduction is preceded by a host of organismal adjustments and transformations, involving morphological, physiological, and behavioral ... -
Testosterone positively associated with both male mating effort and paternal behavior in savanna baboons (Papio cynocephalus)
Onyango, Patrick O; Gesquiere, Laurence R; Altmann, Jeanne; Alberts, Susan C (Academic Press, 2013-03-31)Testosterone (T) is often positively associated with male sexual behavior and negatively associated with paternal care. These associations have primarily been demonstrated in species where investment in paternal care begins ...