Sex Ratio: Adaptive Response to Population Fluctuations in Pandalid Shrimp

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Science  14 Apr 1978:
Vol. 200, Issue 4338, pp. 204-206
DOI: 10.1126/science.200.4338.204


Pandalus jordani is a protandrous (sequential) hermaphrodite. Populations show large year-to-year variation in age composition. In response to this variation, individuals alter the age at which they change sex. This response is predicted by a genetic model that assumes that an individual shrimp maximizes its genetic contribution to the next generation.