Delay in Adélie penguin nest occupation restricts parental investment in nest construction and reduces reproductive output

© 2024 Commonwealth of Australia. Ecology and Evolution published by John Wiley & Sons Ltd..

Reproductive success is an important demographic parameter that can be driven by environmental and behavioural factors operating on various spatio-temporal scales. As seabirds breed on land and forage in the ocean, processes occurring in both environments can influence their reproductive success. At various locations around East Antarctica, Adélie penguins' (Pygoscelis adeliae) reproductive success has been negatively linked to extensive sea-ice. In contrast, our study site in the Windmill Islands has limited fast ice present during the breeding season, allowing us to examine drivers of reproductive success under vastly different marine environmental conditions. Here, we examined the reproductive success of 450 Adélie penguin nests over a 10-year period using images obtained from remotely operated cameras. We analysed nest survival in relation to marine and climatic factors, environmental conditions at the camera site and immediately around the nest, and behavioural attributes reflecting parental investment and phenological timing. Our key result was a strong positive association between nest structure and chick survival, particularly when ground moisture and snow cover around the nest were high. Earlier nesting birds were more likely to build bigger nests, although it is unclear whether this is due to more time available to build nests or whether early arrival and high-quality nests are complementary traits. This intrinsic activity is likely to become more important if future predictions of increased snowfall in this region manifest.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:14

Enthalten in:

Ecology and evolution - 14(2024), 3 vom: 31. März, Seite e10988

Sprache:

Englisch

Beteiligte Personen:

McLatchie, Madi J [VerfasserIn]
Emmerson, Louise [VerfasserIn]
Wotherspoon, Simon [VerfasserIn]
Southwell, Colin [VerfasserIn]

Links:

Volltext

Themen:

Journal Article
Nest structure
Nest survival
Remotely operated cameras
Reproductive success
Seabird ecology
Windmill Islands

Anmerkungen:

Date Revised 14.03.2024

published: Electronic-eCollection

Citation Status PubMed-not-MEDLINE

doi:

10.1002/ece3.10988

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM369664213