Pandalus jordani is a protandrus (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 an individual shrimp maximizes its genetic contribution to the next generation.
hermaphrodites, protandry, sex ratio, Pandalid shrimp
Charnov, E.L., D. Gotshall, and J. Robinson. 1978. Sex ratio: Adaptive response to population fluctuation in Pandalid shrimp. Science 200:204-206