Abstract: The filter-feeding rate and feeding rhythm of juvenile rock scallopCrassadoma giganteawith various body weight(dry software weight)of 0.005 g(S),0.012 g(M)and 0.026 g(L)were studied under different algae includingNitzschia closterium,Isochrysis zhanjiangensis,Platymonas subcordiformis,andChlorella vulgaris,at concentration of(15×104,30×104,45×104,60×104,and 75×104cells/mL)and water temperatures of6,10,14, 18℃,and 22℃in order to understand the filter-feeding rate of juvenile rock scallop by a hydrostaticmethod.It was found that there were significant or very significant effects of temperature,body weight,alga species,and alga concentration on the filter-feeding rate of juvenile rock scallop(P<0.05 orP<0.01).The filter-feeding rate per unit body weight of juvenile rock scallop was shown to increase with warming temperature and increase in body weight within the test temperature range(6-22℃).The filter-feeding rate order of the scallop fed the four unicellular algae was expressed asN.closterium>I.zhanjiangensis>P.subcordiformis>C.vulgaris,with significant or very significant differences among the four unicellular algae(P<0.05 orP<0.01).The maximum filter-feeding rate per unitbody weightwas observed atN.closteriumconcentration of30×104cells/mL,significantly higher than those in other groups(P<0.01).There were significant diurnal variation in filter-feeding rate(P<0.05),with peak at 17:00-21:00[40.161×108cells/(g·h)],significantly higher than those in other time(P<0.05),and two low values at9:00-13:00[32.496×108cells/(g·h)],and 1:00-5:00[29.934×108cells/(g·h)],significant lower than thos in other time(P<0.05).The findings indicate that rock scallop is suitable for induction and culture due to wide suitable water temperature range and food items.
曹善茂, 梁伟锋, 汪健, 刘钢, 李晓雨. 岩扇贝幼贝滤食率的基础研究[J]. 大连海洋大学学报, 2016, 31(6): 612-617.
CAO Shan-mao, LIANGWei-feng, WANG Jian, LIU Gang, LIXiao-yu. Fundamental research on filter-feeding rate of juvenile rock scallop. Journal of Dalian Ocean University, 2016, 31(6): 612-617.