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Natural Selection And Sex Change In Pandalid Shrimp: Test Of A Life History Theory, Eric Charnov
Natural Selection And Sex Change In Pandalid Shrimp: Test Of A Life History Theory, Eric Charnov
Biology Faculty & Staff Publications
This article presents a graphical approach to the genetical theory of sex change (similar to one recently applied to the evolution of simultaneous hermaphroditism). The graphs will help clarify a set of predictions to be tested against data from Pandalid shrimp. These shrimp are protandrous hermaphrodites (reproduce first as males). The goal is to use the genetical theory to predict the age of sex change. Since these shrimp show much geographic variation in this age, they provide a good opportunity to test the evolutionary model.
Simultaneous Hermaphroditism And Sexual Selection, Eric Charnov
Simultaneous Hermaphroditism And Sexual Selection, Eric Charnov
Biology Faculty & Staff Publications
Theory about the evolution of sexual behavior in dioecious species is based on the general assumption that egg production is limited by a female's ability to garner resources to make eggs, not by a lack of sperm to fertilize them. Reproductive success for males is thus limited by access to females (and their eggs). I suggest that egg production by simultaneous hermaphrodites also obeys this principle--that fertilized egg production by an individual is not limited by sperm availability, but by resources allocated to eggs. If true, this suggests that sperm competition (reproduction success through male function) and a form of …
The Genetical Evolution Of Patterns Of Sexuality: Darwinian Fitness., Eric Charnov
The Genetical Evolution Of Patterns Of Sexuality: Darwinian Fitness., Eric Charnov
Biology Faculty & Staff Publications
No abstract provided.