Factors affecting duration of incubation in Black Brant

Article Abstract:

A study of the factors that affect the length of incubation in Black Brant (Branta bernicla) revealed that the duration of incubation is a function of clutch size and is likely to diminish with later nest initiation. However, mean egg size, ambient temperature and nest attentiveness were found to have no impact on the incubation period. For female Black Brants that are able to start nesting early, the benefits are potentially greater than the costs of reduced embryonic development time since their eggs hatch early enough to maximize recruitment of hatched young.

Eggs, Eggs (Biology), Incubation

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Effects of Spring environment on nesting phenology and clutch size of Black Brant

Article Abstract:

A study on the effects of spring environment on nesting phenology and clutch size of the Black Brant was conducted to examine the variation in response of geese nesting in the Arctic and sub-Arctic regions. Results reveal that nest initiation was more synchronized in the late springs than early springs. Furthermore, reduced number of nest sites and increased nesting occurrence in late years is expected to promote greater competitiveness for available nest sites and decrease in site fidelity.

Alaska

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Variation in brood behavior of Black Brant

Article Abstract:

A seven-year study of broods of Black Brant revealed that adults forage less in comparison to goslings and that male adults spend most of their time in keeping vigil. The amount of time spent in guarding the brood was directly proportional to brood size for adult males but not for the females.

Analysis, Behavior, Animal feeding and feeds

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