Circulating Hormones and Dominance Status Predict Female Behavior during Courtship in a Lekking Species DOI Open Access
Alexis D. Earl, Abigail A. Kimmitt, Jessica L. Yorzinski

et al.

Integrative and Comparative Biology, Journal Year: 2022, Volume and Issue: 62(1), P. 9 - 20

Published: April 22, 2022

Abstract Female competitive behaviors during courtship can have substantial fitness consequences, yet we know little about the physiological and social mechanisms underlying these behaviors—particularly for females of polygynous lek mating species. We explored hormonal drivers female intersexual intrasexual behavior by males in a captive population Indian peafowl. investigated whether (1) non-stress induced circulating estradiol (E2) corticosterone (CORT) levels or (2) dominance status dyad predicts solicitation behavior. also tested E2 CORT predict dominant females’ aggressive toward subordinate context. Our findings demonstrate that with higher as well solicit more courtships from males. Dominant than females. courtship, however, were not associated CORT. Overall, conclude steroid hormones conjunction might play role mediating competition mates. Experimental manipulation measures flexibility throughout breeding season relation to sexual will be necessary further examine link between lekking systems.

Language: Английский

Born without a Silver Spoon: A Review of the Causes and Consequences of Adversity during Early Life DOI Creative Commons
Mark C. Mainwaring, Bret W. Tobalske, Ian R. Hartley

et al.

Integrative and Comparative Biology, Journal Year: 2023, Volume and Issue: 63(3), P. 742 - 757

Published: June 6, 2023

Synopsis A huge amount of research attention has focused on the evolution life histories, but most focuses dominant individuals that acquire a disproportionate level reproductive success, while histories and tactics subordinate have received less attention. Here, we review links between early adversity performance during adulthood in birds, highlight instances which outperform conspecifics. Subordinate are those from broods raised under high risk predation, with low availability food, and/or many parasites. Meanwhile, species hatch or born asynchronously mitigation asynchrony is generally lacking variation maternal effects such as egg size hormone deposition genetic offspring sex parentage. employ patterns differential growth to attempt mitigate they experience life, yet overwhelmingly fail overcome their initial handicap. In terms surviving through adulthood, other “suboptimal” tactics, adaptively timing foraging behaviors avoid individuals. During meanwhile, rely adaptive dispersal competing for partners at optimal times, because represent best options available them copulations whenever possible. We conclude there gap knowledge direct subordination meaning further should test links. There instances, however, where allow conspecifics adulthood.

Language: Английский

Citations

6
Preening correlates with lower feather bacteria abundance but not feather coloration in a lek‐breeding bird DOI Creative Commons
Melanie R. Florkowski,

Kirstin M. DeBlonk,

Jessica L. Yorzinski

et al.

Journal of Avian Biology, Journal Year: 2024, Volume and Issue: 2024(7-8)

Published: March 28, 2024

Feathers are structures unique to birds that serve important functions such as flight, thermoregulation, and communication. Bacteria live on the feathers, particularly ones can break down keratin, have potential damage feathers disrupt their use in We predicted could behaviorally manage feather bacterial abundances by preening feathers. also individuals with lower would brighter more colorful To test these predictions, we measured amount of time a colony captive Indian peafowl Pavo cristatus spent collected determine bacteria abundance surface measure coloration. found had levels when they own but only female birds. were not correlated any color variables measured. These results suggest may influence coloration this species.

Language: Английский

Citations

1
Colour Variation in the Crocodile Lizard (Shinisaurus crocodilurus) and Its Relationship to Individual Quality DOI Creative Commons
Xia Qiu, Martin J. Whiting, Wei‐Guo Du

et al.

Biology, Journal Year: 2022, Volume and Issue: 11(9), P. 1314 - 1314

Published: Sept. 4, 2022

Colour plays a key role in animal social communication including as an indicator of individual quality. Using spectrophotometry, we examined colour variation the throat and venter crocodile lizard (Shinisaurus crocodilurus), endangered species native to southern China northern Vietnam. We detected two broad variants, individuals with without red, for each body region sex. A cluster analysis spectral measurements (hue, chroma, luminance) revealed discrete ventral morphs when measured single snapshot time. However, photographic evidence that amount red relative size increased they got older. Individuals were equally likely be male or female was unrelated colour. Therefore, it is premature claim lizards have morphs. used visual modelling show easily discriminable system, suggesting function communication. also asked whether signalled Females throats had greater bite force while males In addition, females venters larger heads. differences morphology linked slender bodies longer tails, lacking on their stouter shorter tails. Finally, reproductive output (litter mass) females. Males luminance contrast sired offspring from litters litter mass (including stillborns), chromatic whose collective live (excluding stillborns) greater. more stillborns). Collectively, these results suggest signals quality males. Conservation initiatives should take into account planning future captive breeding release programs this species.

Language: Английский

Citations

5
Multiple traits predict reproductive success and assortative mating in mutually ornamented Campo flickers (Colaptes campestris campestris) DOI
Raphael Igor Dias,

Karina Nascimento Cardoso

Behavioral Ecology and Sociobiology, Journal Year: 2023, Volume and Issue: 77(7)

Published: July 1, 2023

Language: Английский

Citations

2
Circulating Hormones and Dominance Status Predict Female Behavior during Courtship in a Lekking Species DOI Open Access
Alexis D. Earl, Abigail A. Kimmitt, Jessica L. Yorzinski

et al.

Integrative and Comparative Biology, Journal Year: 2022, Volume and Issue: 62(1), P. 9 - 20

Published: April 22, 2022

Abstract Female competitive behaviors during courtship can have substantial fitness consequences, yet we know little about the physiological and social mechanisms underlying these behaviors—particularly for females of polygynous lek mating species. We explored hormonal drivers female intersexual intrasexual behavior by males in a captive population Indian peafowl. investigated whether (1) non-stress induced circulating estradiol (E2) corticosterone (CORT) levels or (2) dominance status dyad predicts solicitation behavior. also tested E2 CORT predict dominant females’ aggressive toward subordinate context. Our findings demonstrate that with higher as well solicit more courtships from males. Dominant than females. courtship, however, were not associated CORT. Overall, conclude steroid hormones conjunction might play role mediating competition mates. Experimental manipulation measures flexibility throughout breeding season relation to sexual will be necessary further examine link between lekking systems.

Language: Английский

Citations

2