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- Title
Boldness predicts foraging behaviour, habitat use and chick growth in a central place marine predator.
- Authors
Pereira, Jorge M.; Ramos, Jaime A.; Ceia, Filipe R.; Krüger, Lucas; Marques, Ana M.; Paiva, Vitor H.
- Abstract
Animal personality can shape individual's fitness. Yet, the mechanistic relationship by which individual's personality traits lead to variations in fitness remains largely underexplored. Here, we used novel object tests to measure boldness of chick-provisioning Cory's shearwaters (Calonectris borealis) from a coastal colony off west Portugal, and deployed GPS loggers to study their at-sea behaviour and distribution. We then tested whether boldness predicts individual differences in adult's trophic ecology and variations in chick growth, to assess potential implications of personality-specific foraging behaviours. Foraging effort was higher for shyer than for bolder individuals, which, during short forays, exhibited larger foraging ranges, and foraged in regions of higher and more variable bathymetry. This suggests that nearby the colony bolder individuals expanded their foraging area to maximize resource acquisition and increase the probability of foraging success. When endeavouring to longer distances, bolder individuals exhibited comparably shorter foraging ranges and targeted low bathymetry regions, likely with enhanced prey availability, while shyer individuals exhibited much larger foraging ranges indicating greater flexibility when foraging in oceanic realms. Despite such differences between bolder and shyer individuals their isotopic niches were similar. Yet, chicks raised by bolder parents grew at a faster rate than those raised by shyer parents. Together, our results suggest that differences in resource acquisition strategies could play a key role through which individual's boldness may influence breeding performance, even when individuals have similar isotopic preferences.
- Subjects
PORTUGAL; PREDATORY aquatic animals; CHICKS; PERSONALITY; HABITATS; INDIVIDUAL differences; PREY availability
- Publication
Oecologia, 2024, Vol 205, Issue 1, p135
- ISSN
0029-8549
- Publication type
Article
- DOI
10.1007/s00442-024-05557-4