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Effect of algal ration on feeding and growth of juvenile manila clam Tapes philippinarum (Adams and Reeve)
Coutteau, P.; Curé, K.; Sorgeloos, P. (1994). Effect of algal ration on feeding and growth of juvenile manila clam Tapes philippinarum (Adams and Reeve). J. Shellfish Res. 13(1): 47-55
In: Journal of Shellfish Research. National Shellfisheries Association: Duxbury. ISSN 0730-8000; e-ISSN 1943-6319, meer
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Tapes (Ruditapes) philippinarum (A. Adams & Reeve, 1850) [WoRMS]
Marien/Kust |
| Abstract |
Juvenile Tapes philippinarum (Adams and Reeve) were reared for three weeks on different rations of Chaetoceros neogracile which were either centrifuged and stored or fed together with the culture medium. Algal rations were adjusted daily in order to feed constant weight-specific daily rations. Growth of T. philippinarum fed the concentrate of C. neogracile was maximal at a daily ration of 1% (algal dry weight per clam live weight). T. philippinarum fed single or mixed diets of C. neogracile and Isochrysis sp. (clone T-Iso) directly from the algal cultures, maximized growth at a ration of 1,3% day -1. Higher growth rates and gross growth rates efficiencies were obtained with C. neogracile fed together with the culture medium. A set of grazing experiments showed that the incipient limiting concentration was about 26 C. neogracile cells µ1-1. Measurements of cell concentration during the growth tests demonstrated a discontinuous feeding activity in the treatments receiving the optimal ration for maximum growth. |
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