Effect of competitive cues on reproductive morphology and behavioral plasticity in male fruitflies

Bretman, Amanda, Fricke, Claudia, Westmancoat, James and Chapman, Tracey (2016) Effect of competitive cues on reproductive morphology and behavioral plasticity in male fruitflies. Behavioral Ecology, 27 (2). pp. 452-461. ISSN 1045-2249

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Abstract

Phenotypic plasticity will be favored whenever there are significant fitness benefits of responding to environmental variation. The extent and nature of the plasticity that evolves depends on the rate of environmental fluctuations and the capacity to track and respond to that variability. Reproductive environments represent one arena in which changes can be rapid. The finding that males of many species show morphological, physiological, and behavioral plasticity in response to premating and postmating reproductive competition (RC) suggests that plasticity is broadly beneficial. The developmental environment is expected to accurately predict the average population level of RC but to be a relatively poor indicator of immediate RC at any particular mating. Therefore, we predict that manipulation of average RC during development should cause a response in plasticity “set” during development (e.g., size of adult reproductive structures), but not in flexible plasticity determined by the immediate adult environment (e.g., behavioral plasticity in mating duration). We tested this prediction in Drosophila melanogaster males by manipulating 2 independent cues of average RC during development: 1) larval density and 2) the presence or absence of adult males within larval culture vials. Consistent with the prediction, both manipulations resulted in the development of males with significantly larger adult accessory glands (although testis size decreased when males were added to culture vials). There was no effect on adult plasticity (mating duration, extended mating in response to rivals). The results suggest that males have evolved independent responses to long- and short-term variation in RC.

Item Type: Article
Additional Information: © The Author 2015. Published by Oxford University Press on behalf of the International Society for Behavioral Ecology. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
Uncontrolled Keywords: developmental plasticity,behavioural plasticity,social and sexual environment,larval desnity,accessory gland,testis
Faculty \ School: Faculty of Science > School of Biological Sciences
Depositing User: Pure Connector
Date Deposited: 04 Mar 2016 16:02
Last Modified: 22 Jul 2020 00:41
URI: https://ueaeprints.uea.ac.uk/id/eprint/57375
DOI: 10.1093/beheco/arv170

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