Chest staining variation as a signal of testosterone levels in male Verreaux's Sifaka

  title={Chest staining variation as a signal of testosterone levels in male Verreaux's Sifaka},
  author={Rebecca J. Lewis},
  journal={Physiology \& Behavior},

Male Scent Gland Signals Mating Status in Greater Spear-Nosed Bats, Phyllostomus hastatus

It is found that males that defend and roost with groups of females (harem holders) have significantly different chemical profiles from males found roosting in all male groups (bachelors), and profiles differed significantly among individuals.

Sexual Signalling in Propithecus verreauxi: Male “Chest Badge” and Female Mate Choice

It is reported that stained-chested males had a higher throat marking activity than clean-cheted males during the mating season, but not during the birth season, and it is found that females copulated more frequently with stained-Chested males than the clean- Chested males.

Is inbreeding avoidance driving female mate choice in Verreaux's sifaka lemurs?

It is concluded that inbreeding avoidance does not appear to be the main force driving female mate choice in Verreaux’s sifaka lemurs and explanations for these findings are addressed.

Bill color, not badge size, indicates testosterone-related information in house sparrows

It is found that bill coloration, not badge size, is the best ornamental indicator of a “running average” of male testosterone in house sparrows and therefore the best potential indicator of qualities and/or behavioral strategies associated with testosterone.

Group benefit associated with polymorphic trichromacy in a Malagasy primate (Propithecus verreauxi)

This work identified genetic evidence of polymorphic trichromacy in a population of Verreaux’s sifaka at Kirindy Mitea National Park in Madagascar, and explored effects of color vision on reproductive success and feeding behavior using nine years of morphological, demographic, and feeding data.

Design, delivery and perception of condition-dependent chemical signals in strepsirrhine primates: implications for human olfactory communication

  • C. Drea
  • Biology
    Philosophical Transactions of the Royal Society B
  • 2020
Based on an integrative, 19-species review, the main scent source used differentiates nocturnal from diurnal or cathemeral species, reflecting differing socioecological demands and evolutionary trajectories.

Patterns of male dispersal in Verreaux's sifaka (Propithecus verreauxi) at Kirindy Mitea National Park

The absence of a seasonal immigration pattern suggests that fluid group boundaries may allow mating success without establishment in a social group before the mating season, and it is suggested that coalitions may be used to improve competitive ability.

Male reproductive skew in multimale social groups of Verreaux’s Sifaka (Propithecus verreauxi) at Kirindy Mitea National Park, Madagascar

Female reproductive strategies might hinder dominant males’ monopolization of matings and provide reproductive opportunities to non-dominant and extra-group males in a population of Verreaux’s sifaka living in Kirindy Mitea National Park, Madagascar.

D'scent of man: A comparative survey of primate chemosignaling in relation to sex

  • C. Drea
  • Biology, Psychology
    Hormones and Behavior
  • 2015

Testosterone and reproductive effort in male primates

  • M. Muller
  • Biology, Psychology
    Hormones and Behavior
  • 2017



Birth season testosterone levels in male Verreaux’s sifaka, Propithecus verreauxi: insights into socio-demographic factors mediating seasonal testicular function

The results suggest that birth season elevations in fecal testosterone are the consequence of social disruption resulting from male movements between groups and the particular responses of individual males to dispersal events.

Bimorphism in Male Verreaux’s Sifaka in the Kirindy Forest of Madagascar

It is suggested that stained chests are visual and olfactory signals of dominance rank and that clean chests signal lack of competitive intent.

Seasonal and Social Correlates of Fecal Testosterone and Cortisol Levels in Wild Male Muriquis (Brachyteles arachnoides)

The lack of significant changes in testosterone levels with the onset of the rainy and copulatory season and the lack of prebreeding increases in cortisol may be related to the low levels of overt aggression displayed by male muriquis over access to mates.

Influence of season on seminal characteristics, testis size and serum testosterone in the western spotted skunk (Spilogale gracilis).

The western spotted skunk is a seasonally breeding mammal: most copulations occur in late September and early October, and significant increases in serum testosterone concentration, testis size and ejaculate volume were observed from August to November.

Reproductive hormone profiles in captive male orangutans: implications for understanding developmental arrest.

The overall hormone profiles for arrested and developing adolescent male orangutans suggest that arrested males lack levels of LH, testosterone, and DHT necessary for development of secondary sexual traits, however, they have sufficient testicular steroids, LH, and FSH to fully develop primary sexual function and fertility.

Arrested development of secondary sexual adornments in subordinate adult male mandrills (Mandrillus sphinx).

It is suggested that only alpha males have sufficient testosterone to develop full secondary sexual characteristics, and possible socioendocrine mechanisms underlying the suppression of testosterone and secondary sexual development in subordinate adults are proposed.

Seasonal variation and social correlates of androgen excretion in male redfronted lemurs (Eulemur fulvus rufus)

The findings suggest that redfronted lemurs do not respond with increases in androgens to short-term challenges and that high androgen levels instead correlate with longer-lasting and predictable situations, such as the mating and birth seasons.

Individual and Seasonal Variation in Fecal Testosterone and Cortisol Levels of Wild Male Tufted Capuchin Monkeys, Cebus apella nigritus

The sustained high-magnitude increase in steroids during the peak of adult female sexual activity was associated with a relatively low rate of male-male intragroup aggression.

Reproductive Behavior of Female Propithecus verreauxi at Beza Mahafaly, Madagascar

  • D. Brockman
  • Biology
    International Journal of Primatology
  • 2004
The degree to which sexual behavior is tightly synchronized to periovulatory events in Propithecus verreauxi was assessed via the behavioral, hormonal, and social correlates of reproduction in a free-ranging population of Madagascar.