Accession Number : AD0696132

Title :   ECOLOGY OF BIVALVE MOLLUSCS AND THE CULTURE OF MYA ARENARIA,

Corporate Author : GENERAL DYNAMICS CORP GROTON CONN ELECTRIC BOAT DIV

Personal Author(s) : Zuraw,Edward A. ; Leone,Donald E. ; Sommers,William T.

Report Date : 01 SEP 1969

Pagination or Media Count : 136

Abstract : Field studies were conducted to determine the importance of water circulation and substratum on the distribution of bivalve molluscs in a Rhode Island coastal lagoon. The feasibility of culturing the soft-shell clam, Mya arenaria, in artificial sea water was also investigated. The results of field studies indicated that the general water circulation pattern in the lagoon isn't a restrictive factor in determining bivalve distribution. Although molluscs such as Mya, Mercenaria, and Gemma were found to be commonly associated with substrates containing sand, and molluscs such as Tellina and Mulinia were commonly found associated with mud substrates, the broad range of sediment categories successfully colonized by many of the bivalves showed that the substratum itself also is not a restrictive factor. A hypothesis compatible with survey findings was formulated which states that the average quantity and quality of the food supply immediately overlying the substratum coupled with innate feeding capability of bivalves is primarily responsible for observed distributions. Although Mya was not successfully cultured through a complete life cycle, adults ranging from 3/4 to 3 inches in size were successfully maintained in artificial sea water at 4C for a period of two years.

Descriptors :   (*MOLLUSCA, ECOLOGY), DISTRIBUTION, AQUATIC ANIMALS, MARINE BIOLOGY, FOOD, LIFE CYCLES, GROWTH(PHYSIOLOGY), RHODE ISLAND

Subject Categories : Biological Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE