Date of Award

Spring 1977

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Ocean & Earth Sciences

Program/Concentration

Oceanography

Committee Director

Anthony J. Provenzano

Committee Member

Harold G. Marshall

Committee Member

Chester E. Grosch

Committee Member

M. H. Roberts, Jr.

Call Number for Print

Special Collections LD4331.O35 H565

Abstract

The effects of temperature and salinity on the larval development of the sand shrimp, Crangon septemspinosa, were investigated in the laboratory using 30 combinations of temperature and salinity in a five by six factorial experiment. The five temperatures were 5°c, 10°c, 15°c, 20°c, and 25°c and the six salinities were 10°/oo, 15°/oo, 20°/oo, 25°/oo, 30°/oo and 35°/oo. Thirty-six larvae were used for each temperature-salinity combination. Temperature and salinity produced significant differences (1% level) in survival and the duration of larval development. Highest survival occurred at 15°c and 20°/oo. At optimum temperatures (15°c to 20°c) larvae exhibited the broadest tolerance to salinity (10°/oo to 30°/oo). Unfavorable temperatures (50c) narrowed the salinity range tolerated by larvae (200/00 to 25°/oo). Development was most rapid at 25°c in 20°/oo, least rapid at 5°c in 25°/oo, Low temperatures not only lengthened development time but extended the range of days over which larvae changed from one stage to another. Peak larval abundance in the plankton in the Chesapeake Bay (Goy, 1976 Sandifer, 1972) occurs at temperatures and salinities that favored larval life in laboratory rearings.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

DOI

10.25777/khfd-jw96

Download

Share

COinS