Juvenile (4 g) sibling diploid and triploid Tapes philippinarum were grown in temperate waters at an intertidal site of the Menai Strait, Wales, UK, and in tanks receiving effluent sea water from fish culture ponds at Eilat, Israel. After 1 year, the clams had reached near market size of 15 g. Sea water temperature and chlorophyll a levels were consistently higher at Eilat. There was a significant decline in clam triploidy status, from an initial level of 35% to 1% at the Welsh site and a non-significant decline to around 20% at Eilat. Triploid clams at both sites produced gametes and at Eilat spawning occurred. There were no consistent significant differences in growth, condition index, carbohydrate and lipid content of the diploids and triploids at either site. In Wales, noticeable differences in growth, but not condition index, occurred as a result of tidal exposure.
Bibliographical noteFunding Information:
We gratefully acknowledget he technical assistanceg iven by D.B. Edwards (Conwy), B. Colorni, E. Marshall, R. Fridman, D. Ben Ezra, G. Gorshkov (Eilatl. To Dr Oshri (Tel-Aviv University) for the use of the flow cytometer. To S.K. Allen Jr. (Rutgers University) for helpful commentso n the manuscript.T o Negev-Arava R&D (Israel) for financial support for the Israeli work and to the British Council (Israel) for sponsoring a visit to Eilat by B.E. Spencer.
- Tapes philippinarum
ASJC Scopus subject areas
- Aquatic Science