Search Results - subject:"hatching asynchrony"

Hatching order and size-dependent mortality in relation to brood sex ratio composition in chinstrap penguins

Fargallo, Juan A.; Polo, Vicente; Neve, Liesbeth de; … - In: Behavioral Ecology 17 (2006) 5, pp. 772-778

The differential environmental sensitivity of the sexes has strong implications in the evolutionary history of species as it can alter sexual size dimorphism, population sex ratios, and the faculty of parents to manipulate offspring sex in relation to environmental conditions. We studied sexual...

Persistent link: https://www.econbiz.de/10008581325

Microbial infection affects egg viability and incubation behavior in a tropical passerine

Cook, Mark I.; Beissinger, Steven R.; Toranzos, Gary A.; … - In: Behavioral Ecology 16 (2005) 1, pp. 30-36

Many avian species initiate incubation before clutch completion, which causes eggs to hatch asynchronously. This influences brood competitive dynamics and often results in nestling mortality. The prevailing hypotheses contend that parents incubate early because asynchronous hatching provides...

Persistent link: https://www.econbiz.de/10008581450

Sex differences in embryo development periods and effects on avian hatching patterns

Cook, Mark I.; Monaghan, Pat - In: Behavioral Ecology 15 (2004) 2, pp. 205-209

Competitive interactions among siblings are an important determinant of parental fitness. These are strongly influenced by relative offspring size and therefore also by the extent to which parents can influence offspring size hierarchies. The temporal pattern of hatching in an avian clutch has a...

Persistent link: https://www.econbiz.de/10008581821

Within-clutch patterns of yolk testosterone vary with the onset of incubation in black-headed gulls

Müller, Wendt; Eising, Corine M.; Dijkstra, Cor; … - In: Behavioral Ecology 15 (2004) 6, pp. 893-397

Hatching asynchrony in birds produces an age and size hierarchy among siblings. Later-hatching chicks have a … effects of hatching asynchrony, allowing a more precise adjustment of the survival probabilities of each chick. Here, we show … incubates longer before clutch completion, which is the major determinant of the degree of hatching asynchrony. This finding …

Persistent link: https://www.econbiz.de/10008581881

Food limitation in asynchronous bluethroat broods: effects on food distribution, nestling begging, and parental provisioning rules

Smiseth, Per T.; Bu, Rolf J.; Eikenæs, Aase K.; … - In: Behavioral Ecology 14 (2003) 6, pp. 793-801

Scramble competition models of begging predict that junior nestlings will be more affected by food limitation than seniors. These models assume that food allocation is under offspring control and, hence, predict that this change in food distribution is caused by a differential behavioral...

Persistent link: https://www.econbiz.de/10008581580