Date Awarded

1971

Document Type

Thesis

Degree Name

Master of Science (M.Sc.)

Department

Virginia Institute of Marine Science

Advisor

Morris Brehmer

Committee Member

Michael E. Bender

Committee Member

Dale Calder

Abstract

Larvae of the American oyster Crassostrea virginica (Gmelin) were subjected to thermal shocks of varying magnitude at different larval ages. The effects were assessed in terms of mortality, growth, and setting success. Growth of larvae acclimated at 25 C and 20% salinity was not affected by a thermal shock of 10 C or 15 C, but a 20 C thermal shock had detrimental effect on growth. Mortality of oyster larvae increased significantly following thermal chocks of 10, 15, and 20 C, and was higher for older than for younger larvae. Setting rates of the control and 10 C shocked larvae were not significantly different, but larvae receiving 15 or 20 C shocks had significantly lower setting success. Growth rate and setting also seemed affected by the age at which the larvae received a thermal shock. This dissertation is from the Joint Program Degree from the College of William & Mary and University of Virginia and awarded by the University of Virginia.

DOI

https://doi.org/10.25773/YSNQ-ZC44

Rights

© The Author

Download

Share Feedback

Share

COinS