| Title | Sibling competition for food and kin selection in nestlings of a colonial raptor |
| Abstract | Kin selection theory predicts that individual progeny members, in species where offspring share depreciable parental care, should increasingly attempt to monopolize resources provided by the parents as their relatedness to brood competitors declines. Although the level of relatedness among broodmates is often variable in vertebrates, whether it affects within-brood competition dynamics has seldom been studied. We tested this prediction in nestlings of the lesser kestrel, Falco naumanni, a cavity-nesting colonial raptor that can breed in high-density colonies, where nestlings often move between nearby nests, generating mixed parentage among broodmates. Pairs of nestlings composed of either unrelated, unfamiliar individuals or siblings were experimentally forced to compete for food. Nestlings stole prey more frequently when competing with an unrelated, unfamiliar competitor than when competing with a sibling. This finding adds to the limited evidence that rivalry among broodmates is affected by their relatedness, suggesting that kin recognition and kin selection may play an important role in determining individual competitive strategies and care allocation in multiparous species.(c) 2022 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved. |
| Source | Animal behaviour (Print) 194, pp. 233–238 |
| Keywords | colonialityfood theftkin selectionrelatednessresource monopolizationsibling competitionsibling interaction |
| Journal | Animal behaviour (Print) |
| Editor | Baillie`re Tindall [etc.], London,, Regno Unito |
| Year | 2022 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.anbehav.2022.10.002 |
| Authors | Romano, Andrea; Morganti, Michelangelo; Assandri, Giacomo; Bazzi, Gaia; Corregidor-Castro, Alejandro; Morinay, Jennifer; Cecere, Jacopo G.; Pilastro, Andrea; Rubolini, Diego |
| Text | 476488 2022 10.1016/j.anbehav.2022.10.002 ISI Web of Science WOS 000889815800001 coloniality food theft kin selection relatedness resource monopolization sibling competition sibling interaction Sibling competition for food and kin selection in nestlings of a colonial raptor Romano, Andrea; Morganti, Michelangelo; Assandri, Giacomo; Bazzi, Gaia; Corregidor Castro, Alejandro; Morinay, Jennifer; Cecere, Jacopo G.; Pilastro, Andrea; Rubolini, Diego Univ Milan; CNR; Ist Super Protez Ricerca Ambientale ISPRA; Univ Padua; NTNU Kin selection theory predicts that individual progeny members, in species where offspring share depreciable parental care, should increasingly attempt to monopolize resources provided by the parents as their relatedness to brood competitors declines. Although the level of relatedness among broodmates is often variable in vertebrates, whether it affects within brood competition dynamics has seldom been studied. We tested this prediction in nestlings of the lesser kestrel, Falco naumanni, a cavity nesting colonial raptor that can breed in high density colonies, where nestlings often move between nearby nests, generating mixed parentage among broodmates. Pairs of nestlings composed of either unrelated, unfamiliar individuals or siblings were experimentally forced to compete for food. Nestlings stole prey more frequently when competing with an unrelated, unfamiliar competitor than when competing with a sibling. This finding adds to the limited evidence that rivalry among broodmates is affected by their relatedness, suggesting that kin recognition and kin selection may play an important role in determining individual competitive strategies and care allocation in multiparous species. c 2022 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved. 194 Published version Articolo in rivista Baillie`re Tindall etc. 0003 3472 Animal behaviour Print Animal behaviour Print Anim. behav. Print Animal behaviour. Print Animal behavior Print RUBOLINI DIEGO michelangelo.morganti MORGANTI MICHELANGELO |
