Inter-population segregation in the wintering areas of macaroni penguins
نویسندگان
چکیده
منابع مشابه
Energetics of diving in macaroni penguins.
Heart rate (fH), abdominal temperature (T(ab)) and diving depth were measured in thirteen free-ranging breeding female macaroni penguins. Measurement of these variables allowed estimation of the mass-specific rate of oxygen consumption (V(O(2))) while diving and investigation of the physiological adjustments that might facilitate the diving behaviour observed in this species. In common with oth...
متن کاملCorticosterone predicts foraging behavior and parental care in macaroni penguins.
Corticosterone has received considerable attention as the principal hormonal mediator of allostasis or physiological stress in wild animals. More recently, it has also been implicated in the regulation of parental care in breeding birds, particularly with respect to individual variation in foraging behavior and provisioning effort. There is also evidence that prolactin can work either inversely...
متن کاملWhere do penguins go during the inter-breeding period? Using geolocation to track the winter dispersion of the macaroni penguin.
Although penguins are key marine predators from the Southern Ocean, their migratory behaviour during the inter-nesting period remains widely unknown. Here, we report for the first time, to our knowledge, the winter foraging movements and feeding habits of a penguin species by using geolocation sensors fitted on penguins with a new attachment method. We focused on the macaroni penguin Eudyptes c...
متن کاملLove thy neighbour or opposites attract? Patterns of spatial segregation and association among crested penguin populations during winter
AIM Competition for food among populations of closely related species and conspecifics that occur in both sympatry and parapatry can be reduced by interspecific and intraspecific spatial segregation. According to predictions of niche partitioning, segregation is expected to occur at habitat boundaries among congeners and within habitats among conspecifics, while negative relationships in the de...
متن کاملCoexistence of oceanic predators on wintering areas explained by population-scale foraging segregation in space or time.
Ecological niche theory predicts segregation mechanisms that mitigate potential competition between closely related organisms. However, little is known outside the breeding season, when central-place foraging animals may move on larger scales. This study tested for segregation mechanisms within the same 2007 inter-breeding period on three neighboring populations of avian predators from the sout...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 2011
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps08907