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Biol Bull 146: 78-87. (February 1974)
© 1974 Marine Biological Laboratory
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SURVEY OF GENETIC DIFFERENTIATION IN A COASTAL ZONE INVERTEBRATE: THE ECTOPROCT SCHIZOPORELLA ERRATA

THOMAS J. M. SCHOPF 1

1 Department of the Geophysical Sciences, and Committee on Evolutionary Biology University of Chicago, Illinois 60637; and the Marine Biological Laboratory, Woods Hole, Massachusetts 02543

Gene and genotype frequencies are reported for two polymorphic loci which make the enzymes leucine amino peptidase and glutamate oxalate transaminase for a ubiquitous coastal zone species, the marine ectoproct Schizoporella errata (S. unicornis of most literature). Allele frequencies were determined from 14 localities in the Cape Cod region for 1972 and repeated in 1973. Gene frequencies for both loci change in a regular manner that is correlated with local water temperature during the warmest season. Allele frequencies have remained fairly uniform in local populations for as long as 5 successive years.






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