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The empirical question of thresholds and mechanisms of mate choice.

Valone, Thomas J.; Nordell, Shawn E.; Giraldeau, Luc-Alain; Templeton, Jennifer J. (1996). The empirical question of thresholds and mechanisms of mate choice. Evolutionary Ecology , vol. 10 , nº 4. p. 447-455.

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Theoretical discussions concerning how animals might best sample and select mates have suggested that individuals could base decisions either on a sample of mates (sampled-based decisions) or on a threshold of comparison (threshold-based decisions). Recent theoretical work demonstrates that threshold-based mating decisions generate higher expected fitness than sample-based mating decisions when search costs exist. Empirical results from most unmanipulated systems, however, either conclude that females make sample-based decisions or are inconclusive. A few experimental studies designed to detect mating thresholds purport to demonstrate threshold-based choice but an examination of these studies indicates such conclusions were premature. We believe that few examples of threshold-based choice exist because protocols designed to identify mating thresholds were often inconsistent with models of threshold choice. We suggest that future empirical work strive not to document mating thresholdsper se. Rather, future work might best reveal decision rules by manipulating the distribution of quality among potential mates; such manipulations predict uniquely how females using sample-based and threshold-based decision rules should behave.

Type de document: Article
Mots-clés libres: decision rules; mate choice criteria; sample-based decisions; threshold-based decisions; sexual selection
Centre: Institut national de la recherche scientifique
Date de dépôt: 02 mai 2018 17:29
Dernière modification: 02 mai 2018 17:29
URI: http://espace.inrs.ca/id/eprint/7092

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