Seasonal Effects on Oviposition Behavior in Allonemobius socius (Orthoptera: Gryllidae): Test of the Sense of Malaise Hypothesis
| Autor: | Alexander E. Olvido, Timothy A. Mousseau |
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| Rok vydání: | 1998 |
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| Zdroj: | Annals of the Entomological Society of America. 91:488-492 |
| ISSN: | 1938-2901 0013-8746 |
| Popis: | For many temperate-zone insects, systematic changes in climate signal the coming of winter and effect changes in behavior and physiology. A late-summer female, for example, that senses a general reduction in temperature, photoperiod, or both may optimize the survivorship of her offspring by laying diapausing eggs. In our study of the bivoltine ground cricket, Allonemobius socius (Scudder), we manipulated the abiotic environment experienced by ovipositing females (i.e., maternal-oviposition environment) and that experienced by her eggs (i.e., egg-incubation environment) to test the hypothesis that mothers dump eggs (i.e., significantly increase egg-laying rate) in response to impending death at the end of the reproductive season. We found that mothers tended to lay more eggs in a summer-than a fall-like environment, and that egg viability (or hatchability) was generally higher in a fall-than a summer-like environment. Thus, our results run contrary to those expected from the sense of malaise hypothesis. We discuss other mechanisms that can explain the observed oviposition patterns. |
| Databáze: | OpenAIRE |
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