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Reproductive skew and individual strategies: infanticide or cooperation?

Reproductive skew and individual strategies: infanticide or cooperation? Infanticide in species with shared reproduction may indicate attempts to control the degree of skew within groups. Alternatively, individuals that have done poorly in reproduction could use infanticide for hastening the next breeding attempt. Many factors influence the individual’s decision over whether it is best to cooperate or engage in destruction. We present a qualitative model incorporating kinship among adults and progeny, social status, group size and seasonality to predict behavioural options for individuals of diverse backgrounds. The social system used for the model was that of the guira cuckoo (Guira guira), a Neotropical bird that breeds communally. We suggest communal breeders utilise the best available predictors for enhancing seasonal reproductive success, with favourable consequences for lifetime inclusive fitness. Predictors rely upon parameters that change over time, including the individual’s assessment of present and future possibilities. The model produces predictions that may be tested through field observations and molecular analyses for species with similar social dynamics. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png acta ethologica Springer Journals

Reproductive skew and individual strategies: infanticide or cooperation?

Macedo, Regina; Quinn, James; Lima, Marcos
acta ethologica , Volume 8 (2) – Nov 26, 2005
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Publisher
Springer Journals
Copyright
Copyright © 2005 by Springer-Verlag and ISPA
Subject
Life Sciences; Behavioral Sciences; Zoology; Evolutionary Biology
ISSN
0873-9749
eISSN
1437-9546
DOI
10.1007/s10211-005-0005-z
Publisher site
See Article on Publisher Site

Abstract

Infanticide in species with shared reproduction may indicate attempts to control the degree of skew within groups. Alternatively, individuals that have done poorly in reproduction could use infanticide for hastening the next breeding attempt. Many factors influence the individual’s decision over whether it is best to cooperate or engage in destruction. We present a qualitative model incorporating kinship among adults and progeny, social status, group size and seasonality to predict behavioural options for individuals of diverse backgrounds. The social system used for the model was that of the guira cuckoo (Guira guira), a Neotropical bird that breeds communally. We suggest communal breeders utilise the best available predictors for enhancing seasonal reproductive success, with favourable consequences for lifetime inclusive fitness. Predictors rely upon parameters that change over time, including the individual’s assessment of present and future possibilities. The model produces predictions that may be tested through field observations and molecular analyses for species with similar social dynamics.

Journal

acta ethologica – Springer Journals

Published: Nov 26, 2005

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