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ISSN : 2287-8327

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Vol.30 No.2
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A Laboratory Study of the Effect of Phytoplankton Concentration, Water Flow and Their Interaction on the Growth of the Sandy Shore Suspension Feeding Clam Gafrarium tumidum

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2007, v.30 no.2, pp.127-133
Shin, P.K.S. (University of Hong Kong, Kowloon)
S.G. Cheung (University of Hong Kong, Kowloon)
Shin,, P. , & S.G., C. (2007). A Laboratory Study of the Effect of Phytoplankton Concentration, Water Flow and Their Interaction on the Growth of the Sandy Shore Suspension Feeding Clam Gafrarium tumidum. Journal of Ecology and Environment, 30(2), 127-133.
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Abstract

The effects of water flow rate and phytoplankton concentration on the growth of the sandy shoreclam Gafrarium tumidumdays, shell length, shell weight and tissue dry weight increased significantly with phytoplankton concentration. For the effect of flow rate, growth was faster when flow rate increased from low to medium level; further increases in flow rate, however, either did not sustain faster growth or resulted in a reduction in growth. The condition index (CI) of a standard-sized clam was significantly higher at low flow rate than at medium and high flow rates and was negatively correlated with phytoplankton concentration. The uncoupled growth of shell and tissue in response to flow rate and phytoplankton concentration may be adaptations to low food environments, so that energy can either be stored to sustain life or reserved for gametogenesis during the reproductive period.

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Clams, Flume, Gafrarium, Growth, Phytoplankton concentration, Water flowShin, P.K.S. and S.G. Cheung J. Ecol. Field Biol. 30 (2) 128made of PVC. The working section, which included two sediment boxes lying side by side, were located in a trough of t, Clams, Flume, Gafrarium, Growth, Phytoplankton concentration, Water flowShin, P.K.S. and S.G. Cheung J. Ecol. Field Biol. 30 (2) 128made of PVC. The working section, which included two sediment boxes lying side by side, were located in a trough of t

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(2007) Received March 22 Accepted May 4,

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