scholarly journals Androgen correlates of male reproductive effort in wild male long-tailed macaques (Macaca fascicularis): A multi-level test of the challenge hypothesis

2015 ◽  
Vol 141 ◽  
pp. 143-153 ◽  
Author(s):  
Cédric Girard-Buttoz ◽  
Michael Heistermann ◽  
Erdiansyah Rahmi ◽  
Muhammad Agil ◽  
Panji Ahmad Fauzan ◽  
...  
Keyword(s):  
Macaca Fascicularis ◽  
Reproductive Effort ◽  
Challenge Hypothesis ◽  
Wild Male ◽  
Multi Level ◽  
Male Reproductive Effort

scholarly journals Give ‘til it hurts: trade-offs between immunity and male reproductive effort in the decorated cricket,Gryllodes sigillatus

2010 ◽  
Vol 23 (4) ◽  
pp. 829-839 ◽  
Author(s):  
S. N. GERSHMAN ◽  
C. A. BARNETT ◽  
A. M. PETTINGER ◽  
C. B. WEDDLE ◽  
J. HUNT ◽  
...  
Keyword(s):  
Reproductive Effort ◽  
Trade Offs ◽  
Gryllodes Sigillatus ◽  
Male Reproductive Effort ◽  
Decorated Cricket

scholarly journals Testosterone and paternal care in East African foragers and pastoralists

2008 ◽  
Vol 276 (1655) ◽  
pp. 347-354 ◽  
Author(s):  
Martin N Muller ◽  
Frank W Marlowe ◽  
Revocatus Bugumba ◽  
Peter T Ellison
Keyword(s):  
North America ◽  
Reproductive Effort ◽  
Paternal Care ◽  
Paternal Involvement ◽  
Cross Cultural ◽  
Cultural Variation ◽  
Committed Relationships ◽  
Challenge Hypothesis ◽  
East African ◽  
Parenting Effort

The ‘challenge hypothesis’ posits that testosterone facilitates reproductive effort (investment in male–male competition and mate-seeking) at the expense of parenting effort (investment in offspring and mates). Multiple studies, primarily in North America, have shown that men in committed relationships, fathers, or both maintain lower levels of testosterone than unpaired men. Data from non-western populations, however, show inconsistent results. We hypothesized that much of this cross-cultural variation can be attributed to differential investment in mating versus parenting effort, even among married fathers. Here, we directly test this idea by comparing two neighbouring Tanzanian groups that exhibit divergent styles of paternal involvement: Hadza foragers and Datoga pastoralists. We predicted that high levels of paternal care by Hadza fathers would be associated with decreased testosterone in comparison with non-fathers, and that no such difference between fathers and non-fathers would be evident in Datoga men, who provide minimal direct paternal care. Twenty-seven Hadza men and 80 Datoga men between the ages of 17 and 60 provided morning and afternoon saliva samples from which testosterone was assayed. Measurements in both populations confirmed these predictions, adding further support to the hypothesis that paternal care is associated with decreased testosterone production in men.

Seasonal and social influences on fecal androgen and glucocorticoid excretion in wild male long-tailed macaques (Macaca fascicularis)

2009 ◽  
Vol 98 (1-2) ◽  
pp. 168-175 ◽  
Author(s):  
C. Girard-Buttoz ◽  
M. Heistermann ◽  
S. Krummel ◽  
A. Engelhardt
Keyword(s):  
Macaca Fascicularis ◽  
Social Influences ◽  
Wild Male

scholarly journals The timing of male reproductive effort relative to female ovulation in a capital breeder

2008 ◽  
Vol 77 (3) ◽  
pp. 469-477 ◽  
Author(s):  
Atle Mysterud ◽  
Christophe Bonenfant ◽  
Leif Egil Loe ◽  
Rolf Langvatn ◽  
Nigel G. Yoccoz ◽  
...  
Keyword(s):  
Reproductive Effort ◽  
Capital Breeder ◽  
Male Reproductive Effort

scholarly journals Interpopulation differences in male reproductive effort drive the population dynamics of a host exposed to an emerging fungal pathogen

2021 ◽  
Author(s):  
Andrés Valenzuela‐Sánchez ◽  
Claudio Azat ◽  
Andrew A. Cunningham ◽  
Soledad Delgado ◽  
Leonardo D. Bacigalupe ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Fungal Pathogen ◽  
Reproductive Effort ◽  
Male Reproductive Effort

scholarly journals Tandem Androgenic and Psychological Shifts in Male Reproductive Effort Following a Manipulated “Win” or “Loss” in a Sporting Competition

Human Nature ◽  
2018 ◽  
Vol 29 (3) ◽  
pp. 283-310 ◽  
Author(s):  
Daniel P. Longman ◽  
Michele K. Surbey ◽  
Jay T. Stock ◽  
Jonathan C. K. Wells
Keyword(s):  
Reproductive Effort ◽  
Male Reproductive Effort

scholarly journals Costs of mate-guarding in wild male long-tailed macaques (Macaca fascicularis): Physiological stress and aggression

2014 ◽  
Vol 66 (4) ◽  
pp. 637-648 ◽  
Author(s):  
Cédric Girard-Buttoz ◽  
Michael Heistermann ◽  
Erdiansyah Rahmi ◽  
Muhammad Agil ◽  
Panji Ahmad Fauzan ◽  
...  
Keyword(s):  
Macaca Fascicularis ◽  
Physiological Stress ◽  
Mate Guarding ◽  
Wild Male

scholarly journals Does male reproductive effort increase with age? Courtship in fiddler crabs

2013 ◽  
Vol 9 (2) ◽  
pp. 20121078 ◽  
Author(s):  
Catherine L. Hayes ◽  
Isobel Booksmythe ◽  
Michael D. Jennions ◽  
Patricia R. Y. Backwell
Keyword(s):  
Egg Size ◽  
Reproductive Effort ◽  
Female Preference ◽  
Age Dependence ◽  
Experimental Protocol ◽  
Fiddler Crabs ◽  
Age Dependent ◽  
Uca Annulipes ◽  
Female Presence ◽  
Male Reproductive Effort

Theory suggests that reproductive effort generally increases with age, but life-history models indicate that other outcomes are possible. Empirical data are needed to quantify variation in actual age-dependence. Data are readily attainable for females (e.g. clutch per egg size), but not for males (e.g. courtship effort). To quantify male effort one must: (i) experimentally control for potential age-dependent changes in female presence; and, crucially, (ii) distinguish between the likelihood of courtship being initiated, the display rate, and the total time invested in courting before stopping (‘courtship persistence’). We provide a simple experimental protocol, suitable for many taxa, to illustrate how to obtain this information. We studied courtship waving by male fiddler crabs, Uca annulipes . Given indeterminate growth, body size is correlated with age. Larger males were more likely to wave at females and waved more persistently. They did not, however, have a higher courtship rate (waves per second). A known female preference for males with higher display rates explains why, once waving is initiated, all males display at the same rate.

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