Food abundance and parental care in yellow warblers ( Dendroica petechia )

1995 ◽  
Vol 37 (1) ◽  
pp. 45-50 ◽  
Author(s):  
G. A. Lozano ◽  
R. E. Lemon
Keyword(s):  
Parental Care ◽  
Food Abundance ◽  
Dendroica Petechia ◽  
Yellow Warblers

Parental-care responses by yellow warblers (Dendroica petechia) to simultaneous manipulations of food abundance and brood size

1998 ◽  
Vol 76 (5) ◽  
pp. 916-924 ◽  
Author(s):  
G A Lozano ◽  
R E Lemon
Keyword(s):  
Parental Care ◽  
Brood Size ◽  
Theoretical Models ◽  
Food Abundance ◽  
Biparental Care ◽  
Parental Effort ◽  
Dendroica Petechia ◽  
Supplemental Food ◽  
Yellow Warblers ◽  
Partial Compensation

Theoretical models view biparental care as a state of equilibrium that can be maintained only when the amount of parental care provided by one parent depends on the amount provided by its mate. According to these models, biparental care results when a decrease in the contribution of one parent is partially, but not completely, compensated for by an increase in the contribution of the other parent. Furthermore, this equilibrium state can only be stable if any other external factor affects male and female effort equally. We used yellow warblers (Dendroica petechia) to examine whether changes in brood size and food abundance affect the parental contributions of the sexes equally. Supplemental food did not affect parental care by either sex, but brood size did. Both males and females provided more to larger broods, and in large broods only, their provisioning rates increased with nestling age. Parental effort per nestling was similar in the two sexes, being higher for smaller broods and increasing with nestling age. Based on brood biomass, parental effort was greater for smaller broods, and decreased with nestling age in females only. Therefore, in agreement with current models of the maintenance of biparental care, the effects of brood size and nestling age on parental care did not differ significantly between the sexes. Nonetheless, data from other species and theory indicate that the costs and benefits of providing parental care differ between the sexes, so it is unlikely that biparental care can be maintained solely by a partial compensation response.

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

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.

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.

Tests of two functions of alarm calls given by yellow warblers during nest defence

2003 ◽  
Vol 81 (10) ◽  
pp. 1685-1690 ◽  
Author(s):  
Sharon A Gill ◽  
Spencer G Sealy
Keyword(s):  
Molothrus Ater ◽  
Egg Laying ◽  
Nest Defence ◽  
Alarm Calls ◽  
Potential Danger ◽  
Dendroica Petechia ◽  
Yellow Warblers ◽  
Avian Nest ◽  
Nest Predators

During nest defence, yellow warblers (Dendroica petechia) give "seet" and "chip" calls. Seet calls are given preferentially toward brood parasitic brown-headed cowbirds (Molothrus ater) during the yellow warblers' egg-laying period, whereas chip calls are given toward mammalian and avian nest predators throughout the nesting period. In this study, we investigated two possible functions of seet and chip calls during nest defence by playing alarm calls to nesting yellow warblers. We tested whether nest owners give seet and chip calls during defence to alert their offspring and their mates about nest threats and, in the latter case, whether the alarm calls differ in function depending on nesting stage. In response to playbacks, nestlings remained inactive for a significantly longer period when chip calls were played than when seet calls were played. Female yellow warblers returned to their nesting areas more quickly when seet calls were played than when chip calls were played, but pairs were equally likely to return to the nesting area in response to both call types. These findings suggests that both seet and chip calls alert mates but that only chip calls function to alert nestlings of potential danger.

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

2018 ◽  
Vol 41 ◽  
pp. 118-129
Author(s):  
Yi-Ju Wang ◽  
Charles E. Taylor ◽  
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 by wagon16 on Flickr. https://flic.kr/p/G2W6Bk

Effects of Dispersal on Survival Probability of Adult Yellow Warblers (Dendroica petechia)

The Auk ◽  
2002 ◽  
Vol 119 (3) ◽  
pp. 778-789 ◽  
Author(s):  
Mark S. Lindberg ◽  
Joshua J. Tewksbury ◽  
Sallie J. Hejl
Keyword(s):  
Survival Probability ◽  
Dendroica Petechia ◽  
Yellow Warblers
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