Journal ArticleDOI
Incubation and brooding performance of the Antarctic Petrel Thalassoica antarctica at Svarthamaren, Dronning Maud Land
Svein-Håkon Lorentsen,Nils Røv +1 more
TLDR
Both males and females gained weight at a higher rate when at sea than they lost it during incubation, and it is suggested that factors unrelated to food availability or individual feeding skills may be important in regulating the duration of the incubation shifts and the stay at sea.Abstract:
Antarctic Petrel Thalassoica antarctica incubation and brooding effort was studied at Svarthamaren, Dronning Maud Land, during the austral summer of 1991–1992. The females probably left the nest site shortly after egg laying. The duration of incubation and brooding shifts as well as the daily weight loss (absolute and proportionate) were comparable with those of other similar-sized procellariform species. Males spent more time incubating and brooding than did females, suggesting higher female energy stress due to egg laying. Incubating birds which were below average weight were likely to desert the nests before their mates returned from feeding trips. Both males and females lost approximately one-fifth of their body-weight during their first incubation shifts. Nevertheless, they increased their initial weights from egg laying to hatching and had their highest initial weights when they returned to start the shift during which the egg hatched. No factors related to adult body-weight explained the duration of the incubation shifts. Both males and females gained weight at a higher rate when at sea than they lost it during incubation, and it is suggested that factors unrelated to food availability or individual feeding skills may be important in regulating the duration of the incubation shifts and the stay at sea.read more
Citations
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Journal ArticleDOI
Exploring individual quality: Basal metabolic rate and reproductive performance in storm-petrels
Alexis L. Blackmer,Robert A. Mauck,Joshua T. Ackerman,Charles E. Huntington,Gabrielle A. Nevitt,Joseph B. Williams +5 more
TL;DR: The results provide evidence that intraspecific variation in reproductive performance is related to BMR and suggest that BMR may influence individual quality in males, and support the compensation hypothesis.
Journal ArticleDOI
Ultimate and proximate factors affecting the breeding performance of a marine top-predator
David Pinaud,Henri Weimerskirch +1 more
TL;DR: Differences in resource variability and availability affect the demographic strategies probably through differences in allocation strategies in the same species, as demonstrated in Kerguelen birds.
Journal ArticleDOI
Regulation of food provisioning in the Antarctic petrel; the importance of parental body condition and chick body mass
TL;DR: The results suggest that the Antarctic petrel parents adjust the amount of food delivered to their chick according to both the chick's need and their own body condition, and that the ability to respond to the chick’s need is dependent upon their ownBody condition.
Journal ArticleDOI
Regulation of food provisioning in the Antarctic petrel Thalassoica antarctica
TL;DR: The results strongly suggest that the effort spent during the chick-rearing period, and thus reproductive success, is regulated by the body condition of the parents.
References
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Journal ArticleDOI
Satellite tracking of Wandering albatrosses
TL;DR: The first successful tracking of a bird using satellite telemetry was described in this article, which showed that the birds covered between 3,600 and 15,000 km in a single foraging trip during an incubation shift.
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The mechanics of bird migration
TL;DR: A theory is presented for calculating the relation between mechanical power required to fly and forward speed, for a bird flying horizontally, and the significance of this for migration is explained, and quick methods are given for calculating key points on the curve.
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Loss of mass in breeding wrens: stress or adaptation?
TL;DR: The timing of mass losses of females may be adaptive by permitting a 23% reduction in power required to remain aloft in flight before the most demanding period of feeding nestlings.
Journal ArticleDOI
Energy Costs of Incubation and Moult in Petrels and Penguins
TL;DR: Data support the present assumption that only about half the material lost during these fasts is fat, the rest being mainly water, and that the daily energy cost of incubation in petrels and penguins is about 1.4 times the estimated cost of basal metabolism.
Journal ArticleDOI
Regulation of parental effort in a long-lived seabird an experimental manipulation of the cost of reproduction in the antarctic petrel, Thalassoica antarctica
TL;DR: An experiment on the Antarctic petrel is reported in which the costs of rearing an offspring were manipulated by placing small lead loads on the legs of one parent and the bird could then either decrease its own body reserves or reduce the food load to the chick.