Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Evidence of age-related improvement in the foraging efficiency of Adélie penguins
Lescroël, A.; Ballard, G.; Massaro, M.; Dugger, K.M.; Jennings, S.; Pollard, A.; Porzig, E.; Schmidt, A.; Varsani, A.; Grémillet, D.; Ainley, D.G. (2019). Evidence of age-related improvement in the foraging efficiency of Adélie penguins. NPG Scientific Reports 9(1): 13 pp. https://dx.doi.org/10.1038/s41598-019-39814-x
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
|   |
| Auteurs | | Top |
- Lescroël, A.
- Ballard, G.
- Massaro, M.
- Dugger, K.M.
|
- Jennings, S.
- Pollard, A.
- Porzig, E.
- Schmidt, A.
|
- Varsani, A.
- Grémillet, D.
- Ainley, D.G.
|
| Abstract |
Age variation in reproductive performance is well-documented but the mechanisms underlying this variation remain unclear. Foraging efficiency is likely to be a key source of demographic variation as it determines the amount of energy that can be invested in fitness-related activities. Evidence of age-related changes in the foraging efficiency of adult seabirds is scarce and inconsistent. We investigated the effects of age on the foraging efficiency of breeding Adélie penguins, a relatively short-lived seabird species, in order to gain a broader perspective on the processes driving variation in ageing rates. We found support for a positive effect of age, either linear or levelling off at old ages, on both our proxies for daily catch rate and catch per unit effort. Across all age classes, males were more performant foragers than females. We found no strong evidence for differing ageing patterns between sexes or individual quality levels, and no evidence for senescence. We infer that continuous individual improvement could be responsible for a larger amount of the variation in foraging efficiency with age at our study site, compared with selective disappearance of underperforming phenotypes. The different results reported by other studies highlight the need to conduct longitudinal studies across a range of species in different environments. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
