Does adrenal responsiveness vary with sex and reproductive status in Egernia whitii, a viviparous skink?

Cartledge, Victoria A.; Jones, Susan

doi:10.1016/j.ygcen.2006.07.021

Cited by 41 publications

(26 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some species are more prone to conduct flight and fight responses, while others seek for protection by forming large aggregations, hiding in vegetation or using crypticity strategies, and do not show observable responses despite being physiologically stressed [36–38]. Similarly, reproductive status can also condition the animals’ response, since gravid females might have reduced moving capabilities, and individuals involved in parental care may prioritize protection of their offspring to their own survival [39,40]. …”

Section: Introductionmentioning

confidence: 99%

Unmanned aircraft systems as a new source of disturbance for wildlife: A systematic review

Mulero‐Pázmány¹,

Jenni-Eiermann²,

Strebel³

et al. 2017

PLoS ONE

234

202

View full text Add to dashboard Cite

The use of small Unmanned Aircraft Systems (UAS; also known as “drones”) for professional and personal-leisure use is increasing enormously. UAS operate at low altitudes (<500 m) and in any terrain, thus they are susceptible to interact with local fauna, generating a new type of anthropogenic disturbance that has not been systematically evaluated. To address this gap, we performed a review of the existent literature about animals’ responses to UAS flights and conducted a pooled analysis of the data to determine the probability and intensity of the disturbance, and to identify the factors influencing animals’ reactions towards the small aircraft. We found that wildlife reactions depended on both the UAS attributes (flight pattern, engine type and size of aircraft) and the characteristics of animals themselves (type of animal, life-history stage and level of aggregation). Target-oriented flight patterns, larger UAS sizes, and fuel-powered (noisier) engines evoked the strongest reactions in wildlife. Animals during the non-breeding period and in large groups were more likely to show behavioral reactions to UAS, and birds are more prone to react than other taxa. We discuss the implications of these results in the context of wildlife disturbance and suggest guidelines for conservationists, users and manufacturers to minimize the impact of UAS. In addition, we propose that the legal framework needs to be adapted so that appropriate actions can be undertaken when wildlife is negatively affected by these emergent practices.

show abstract

Section: Introductionmentioning

confidence: 99%

Unmanned aircraft systems as a new source of disturbance for wildlife: A systematic review

Mulero‐Pázmány¹,

Jenni-Eiermann²,

Strebel³

et al. 2017

PLoS ONE

234

202

View full text Add to dashboard Cite

show abstract

“…Because female glucocorticoid responses to ACTH are consistently robust in both spring and autumn, we suggest that the observed sex difference primarily reflects suppressed male responsiveness during the spring. Sex differences in the sensitivity of the HPA axis, particularly during the breeding season, have been reported previously (Ashley et al, 2011;Cartledge and Jones, 2007;Keenan et al, 2009;van Lier et al, 2003). For example, in male sheep (Ovis aries), ACTH elicits a smaller glucocorticoid response during the breeding season versus the non-breeding season, yet female sheep respond to ACTH equally in the two seasons (van Lier et al, 2003).…”

Section: Sex Differences In Glucocorticoid Responsiveness To Acth Chamentioning

confidence: 81%

“…Our data therefore support the hypothesis that decreased adrenal responsiveness to ACTH explains, at least in part, previous reports of suppressed stress responses in males during the mating season. Seasonal variation in responses to ACTH occurs in fish, amphibians, reptiles, birds and mammals (Astheimer et al, 1995;Capaldo et al, 2004;Cartledge and Jones, 2007;Girard et al, 1998;Gist, 1972;Ingram et al, 1999;Mashburn and Atkinson, 2008;van Lier et al, 2003). Studies in birds and reptiles further suggest that modulation of sensitivity to ACTH is associated with plasticity in stress responses (e.g.…”

Section: Seasonal Differences In Glucocorticoid Responsiveness To Actmentioning

confidence: 99%

“…Importantly, the magnitude of the stress-induced increase in glucocorticoids is often context dependent, varying with season (Astheimer et al, 1995;Klukowski, 2011;, sex (Cartledge and Jones, 2007;Pottinger et al, 2013), reproductive state (Cartledge and Jones, 2007;) and body condition (Dayger et al, 2013;Heath and Dufty, 1998). For example, male fence lizards (Sceloporus undulatus) generally respond to a standardized capture stress protocol by increasing plasma glucocorticoids.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Seasonal and sex differences in responsiveness to adrenocorticotropic hormone contribute to stress response plasticity in red-sided garter snakes (Thamnophis sirtalis parietalis)

Dayger

Lutterschmidt

2016

Journal of Experimental Biology

View full text Add to dashboard Cite

As in many vertebrates, hormonal responses to stress vary seasonally in red-sided garter snakes (Thamnophis sirtalis parietalis). For example, males generally exhibit reduced glucocorticoid responses to a standard stressor during the spring mating season. We asked whether variation in adrenal sensitivity to adrenocorticotropic hormone (ACTH) explains why glucocorticoid responses to capture stress vary with sex, season and body condition in red-sided garter snakes. We measured glucocorticoids at 0, 1 and 4 h after injection with ACTH (0.1 IU g −1 body mass) or vehicle in males and females during the spring mating season and autumn prehibernation period. Because elevated glucocorticoids can influence sex steroids, we also examined androgen and estradiol responses to ACTH. ACTH treatment increased glucocorticoids in both sexes and seasons. Spring-collected males had a smaller integrated glucocorticoid response to ACTH than autumn-collected males. The integrated glucocorticoid response to ACTH differed with sex during the spring, with males having a smaller glucocorticoid response than females. Although integrated glucocorticoid responses to ACTH did not vary with body condition, we observed an interaction among season, sex and body condition. In males, ACTH treatment did not alter androgen levels in either season, but androgen levels decreased during the sampling period. Similar to previous studies, plasma estradiol was low or undetectable during the spring and autumn, and therefore any effect of ACTH treatment on estradiol could not be determined. These data provide support for a mechanism that partly explains how the hypothalamus-pituitaryadrenal (HPA) axis integrates information about season, sex and body condition: namely, variation in adrenal responsiveness to ACTH.

show abstract

“…There are several possible reasons why females might be less likely than males to modify their reproductive behavior in response to short-term stress. Finally, sex-related differences in response to stressors may develop because the stress response frequently varies more with female reproductive stage than with male reproductive stage (Cartledge & Jones, 2007). Thus, it may benefit females more than males to maximize their current reproductive event, even though under certain situations it could entail costs to female survival (Moore & Jessup, 2003).…”

Section: Behaviormentioning

confidence: 99%

Stress and Reproduction in Reptiles

Tokarz

Summers

2011

Hormones and Reproduction of Vertebrates

View full text Add to dashboard Cite

Does adrenal responsiveness vary with sex and reproductive status in Egernia whitii, a viviparous skink?

Cited by 41 publications

References 50 publications

Unmanned aircraft systems as a new source of disturbance for wildlife: A systematic review

Unmanned aircraft systems as a new source of disturbance for wildlife: A systematic review

Seasonal and sex differences in responsiveness to adrenocorticotropic hormone contribute to stress response plasticity in red-sided garter snakes (Thamnophis sirtalis parietalis)

Stress and Reproduction in Reptiles

Contact Info

Product

Resources

About