Presentation Details
| Evolving Aggression: Direct, indirect, and inbreeding effects on social interactions of house crickets Sekhar M A. North Dakota State University, Fargo, North Dakota, USA |
Abstract
Aggressive behaviour arises from social interactions, however it is often treated as an individual trait in quantitative studies. Individuals adjust their behaviour in response to the traits and actions of others, where the genotype of one individual influences the phenotype of another, known as indirect genetic effects (IGEs). IGEs provide a framework for incorporating social interactions into evolutionary models, but most empirical work focuses on dyadic interactions and rarely considers variation across generations or more complex social contexts. Here, I used house crickets (A.domesticus) to examine direct and indirect effects during agonistic interactions. I found that the probability of initiating aggression is shaped by both direct and indirect effects, suggesting that social partner contributions vary across interaction stages.Inbreeding modified aggressive escalation and the strength of indirect effects, indicating that genetic background reshapes social environments. Finally, female genotype generated second-order IGEs by altering male-male contest dynamics. Together, these results demonstrate that aggression is shaped by multiple levels of social and genetic interactions
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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