scholarly journals Individual Risk versus Immediate Reproductive Success: A Basis for Latitudinal Differences in the Adrenocortical Response to Stress in Yellow Warblers (Dendroica petechia)

The Auk ◽  
2004 ◽  
Vol 121 (4) ◽  
pp. 1238-1249 ◽  
Author(s):  
Rebecca L. Holberton
Keyword(s):  
Reproductive Success ◽  
Individual Risk ◽  
Dendroica Petechia ◽  
Adrenocortical Response ◽  
Yellow Warblers ◽  
Response To Stress

scholarly journals Individual Risk Versus Immediate Reproductive Success: A Basis for Latitudinal Differences in the Adrenocortical Response to Stress in Yellow Warblers (Dendroica Petechia)

The Auk ◽  
2004 ◽  
Vol 121 (4) ◽  
pp. 1238-1249 ◽  
Author(s):  
C. Morgan Wilson ◽  
Rebecca L. Holberton
Keyword(s):  
Reproductive Success ◽  
Breeding Season ◽  
Parental Investment ◽  
Bird Species ◽  
Temperate Zone ◽  
Individual Risk ◽  
Dendroica Petechia ◽  
Adrenocortical Response ◽  
Corticosterone Secretion ◽  
Yellow Warblers

AbstractIn many bird species, Arctic-breeding and temperate-zone-breeding populations may have different behavioral and physiological adaptations that reflect trade-offs between immediate survival and reproductive success. Compared with their temperate-zonebreeding counterparts, Arctic breeders face shorter breeding seasons and less predictable environments. As a result, it may be necessary for Arctic breeders to employ immediate life-saving responses (facilitated through an acute adrenocortical response) that might come at the expense of immediate reproductive success. Regardless of latitude, the sexes may also face differences in the trade-off between immediate survivorship and reproductive effort. To investigate those hypotheses, we (1) measured the adrenocortical response of male and female Yellow Warblers (Dendroica petechia) at both ends of a north-south breeding distribution and (2) examined within- and between-sex variation in corticosterone secretion during distinct stages of the breeding season that represent significant differences in parental investment (e.g. incubation and nestling provisioning). As predicted, Arctic-breeding males showed a significantly reduced adrenocortical response during the nestling period (when their parental contribution was highest; mean reduction = 39%), whereas temperate-zone-breeding males showed no significant reduction (mean reduction = 12%). Arctic-breeding and temperate-zone-breeding females did not differ in their adrenocortical responses during incubation and provisioning stages, showed reduced responses when compared with temperate-zone-breeding males, and showed responses similar to those of Arctic-breeding males during the provisioning stage. These data support the hypothesis that, during the breeding season, a reduced adrenocortical response (1) is more likely to occur when the potential for brood loss is greatest and (2) is associated with the degree of parental investment by the sexes. The balance between cost(s) and benefit(s) of the adrenocortical response may vary with the relative risks to survivorship and breeding success, and may vary between populations facing different time and energy constraints.

scholarly journals Are Nestlings the Cue for Reduction of the Adrenocortical Response to Stress in Male Yellow Warblers Breeding at High Latitude?

The Condor ◽  
2007 ◽  
Vol 109 (3) ◽  
pp. 675-679
Author(s):  
C. Morgan Wilson ◽  
Rebecca L. Holberton
Keyword(s):  
High Latitude ◽  
Hormonal Changes ◽  
Hatching Date ◽  
Dendroica Petechia ◽  
Adrenocortical Response ◽  
Corticosterone Secretion ◽  
Endogenous Clock ◽  
Yellow Warblers ◽  
Response To Stress

Abstract Abstract. Acute corticosterone secretion helps individuals survive perturbation, particularly when faced with unpredictable conditions. However, elevated corticosterone is often incompatible with reproduction. Male Yellow Warblers (Dendroica petechia) breeding at high latitude avoid this conflict by exhibiting a reduced adrenocortical response while provisioning nestlings. To determine if this reduction is cued by nestlings, in June 2000 we switched clutches between nest pairs to manipulate hatching date. We sampled males with early-hatching clutches for the adrenocortical response 24 hr after nestlings hatched, but 24 hr prior to the premanipulated (original) hatching date. Similarly, we sampled males with late-hatching clutches 24 hr after the original hatching date, but prior to nestlings hatching. Males with early-hatching clutches (n  =  6) showed no reduced adrenocortical response, while males with late-hatching clutches (n  =  6) appeared to show a reduced response even without nestlings, suggesting that nestlings do not cue the reduction. An endogenous clock, day-counting mechanism, or hormonal changes may be associated with the reduced adrenocortical response.

Age-related variation in song repertoire size and repertoire sharing of yellow warblers (Dendroica petechia)

1986 ◽  
Vol 64 (9) ◽  
pp. 1926-1929 ◽  
Author(s):  
Susan E. Cosens ◽  
Spencer G. Sealy
Keyword(s):  
Reproductive Success ◽  
Dendroica Petechia ◽  
Repertoire Size ◽  
Song Repertoire ◽  
Fledging Success ◽  
Related Variation ◽  
Age Related ◽  
Yellow Warblers ◽  
Clutch Initiation

Songs of male yellow warblers (Dendroica petechia), ranging from 1 to 6 years of age, were recorded in the spring and summer of 1984. Recorded repertoire size and number of songs shared with neighbours varied positively with age in the spring but not in summer. Neither clutch initiation date nor fledging success varied with age or number of songs shared but both measures of reproductive success varied with size of recorded song repertoire.

scholarly journals Environmental noise influences song frequency of Yellow Warblers (Dendroica petechia) in Grand Teton National Park

2017 ◽  
Vol 40 ◽  
pp. 79-90
Author(s):  
Charles E. Taylor ◽  
Yi-Ju Wang ◽  
Martin L. Cody
Keyword(s):  
National Parks ◽  
Background Noise ◽  
National Park ◽  
Peak Frequency ◽  
Dendroica Petechia ◽  
Grand Teton National Park ◽  
Minimum Frequency ◽  
Lack Of Information ◽  
Yellow Warblers ◽  
Song Frequency

We explored how Yellow Warblers (Dendroica petechia) alter their songs when encountering noise in Grand Teton National Park. Different strategies for avoiding signal masking are used by other species of birds, yet there is a lack of information of birds’ responses to higher noise levels–above 65 dB; such levels are often found in National Parks that have many visitors. In this study, we investigated singing behavior of Yellow Warblers when facing noise that ranged from 30 dB to 80 dB. In these preliminary results, we found that some features of Yellow Warblers did not appear to change with background noise level, including mean minimum frequency, bandwidth and song length. Other song features we studied did show small but statistically significant changes with higher background noise, including the peak frequency and the mean minimum frequency, both of which were significantly negatively correlated with the level of background noise. This result is different from the positive correlations that are typically observed. We speculate that this difference is due to the very high dB levels of background noise that we observed.   Featured photo bywagon16 on Flickr. https://flic.kr/p/G2W6Bk

Egg-size variation in Yellow Warblers: apportionment of parental investment and the brood-survival hypothesis

1993 ◽  
Vol 71 (5) ◽  
pp. 1008-1011 ◽  
Author(s):  
Percy N. Hébert ◽  
Spencer G. Sealy
Keyword(s):  
Egg Size ◽  
Survival Rates ◽  
Size Variation ◽  
Relative Mass ◽  
Egg Mass ◽  
Passerine Birds ◽  
Dendroica Petechia ◽  
Brood Survival ◽  
Yellow Warblers ◽  
Clutch Initiation

It has been hypothesized that in passerine birds the larger size of last-laid eggs is part of a brood-survival strategy. We examined the usefulness of the brood-survival hypothesis in explaining intraclutch variation in egg mass of Yellow Warblers (Dendroica petechia). In 4- and 5-egg clutches, egg mass increased significantly with laying order. Although last-hatched nestlings in broods of 4 had higher survival rates than their counterparts in broods of 5, there were no differences in the absolute or relative mass of last-laid eggs in clutches of 4 and 5 eggs. In addition, the mass of last-laid eggs that hatched but did not produce a fledgling was not significantly different from that of last-laid eggs that did produce a fledgling. Finally, the relative mass of last-laid eggs was also not correlated with hatch spread or with date of clutch initiation. The results of this study do not support the brood-survival hypothesis.

THE ADRENOCORTICAL RESPONSE TO INSULIN-INDUCED HYPOGLYCAEMIA

1963 ◽  
Vol 27 (2) ◽  
pp. 183-192 ◽  
Author(s):  
J. LANDON ◽  
V. WYNN ◽  
V. H. T. JAMES
Keyword(s):  
Blood Sugar ◽  
Plasma Cortisol ◽  
Cortisol Concentration ◽  
Endocrine Disease ◽  
Plasma Cortisol Concentration ◽  
Adrenal Axis ◽  
Adrenocortical Response ◽  
Response To Stress ◽  
Pituitary Adrenal Axis

SUMMARY The adrenocortical response to stress as shown by an increase of the plasma cortisol concentration during insulin-induced hypoglycaemia has been studied. The response was found to depend upon the degree and duration of the hypoglycaemia and upon the integrity of the entire hypothalamo-pituitary-adrenal axis. Thus, there was no response in subjects in whom the blood sugar did not fall below 40 mg./100 ml., nor in patients with severe hypothalamic or pituitary disorders. The test was quick and simple to perform and did not require admission to hospital; it would seem to be of considerable value in the investigation of patients with suspected endocrine disease.

Sign in / Sign up

Export Citation Format

Share Document