Simmons, L. W. & Zuk, M. 1994: Age structure of parasitized and unparasitized populations of the field cricket Teleogryllus oceankus. Ethology 98, 333–340.
Age Structure of Parasitized and Unparasitized Populations of the Field Cricket Teleogryllus oceanicus
Version of Record online: 26 APR 2010
1994 Blackwell Verlag GmbH
Volume 98, Issue 3-4, pages 333–340, January-December 1994
How to Cite
Simmons, L. W. and Zuk, M. (1994), Age Structure of Parasitized and Unparasitized Populations of the Field Cricket Teleogryllus oceanicus. Ethology, 98: 333–340. doi: 10.1111/j.1439-0310.1994.tb01081.x
- Issue online: 26 APR 2010
- Version of Record online: 26 APR 2010
- Received: June 14, 1994; Accepted: August 1, 1994 (W. Wickler)
We compared the age structure of three populations of Teleogryllus oceankus that differed with respect to their exposure to parasitization by an acoustically-orienting parasitoid fly, Ormia ochracea. Within two unparasitized populations, females were, on average, younger than males. Female age did not vary across the three populations but males were younger, on average, in the parasitized population. Sexual differences in age structure within populations may arise due to differential risks associated with pair formation. Because we only know of a single parasitized population from which we can sample, we can not be sure that some other ecological difference does not account for the observed variation in age structure across populations. However, the decreased age of males in the parasitized population is at least consistent with the notion of viability selection on males.