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Survival Costs of Reproduction in Grasshoppers

P. De Souza Santos, Jr. and M. Begon
Functional Ecology
Vol. 1, No. 3 (1987), pp. 215-221
DOI: 10.2307/2389423
Stable URL: http://www.jstor.org/stable/2389423
Page Count: 7
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Survival Costs of Reproduction in Grasshoppers
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Abstract

Survival costs of reproduction were examined in starved female grasshoppers (Chorthippus brunneus Thunberg) previously maintained at high and low rations. A strict measure of reproductive effort was used based on measurements of energy value, avoiding misleading conclusions. Females had a greater reproductive effort at high ration than at low. No overt survival costs were associated with this but their existence was suggested. However, survival costs of reproduction were clearly demonstrated at a given ration, even though individuals with high reproductive effort and poor survival tended to assimilate most food. Both past and present reproduction affected survival but the former was more important. The survival costs were themselves found to depend on the interaction between female body size and ration.

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