作　　者： ; ; ;

机构地区： 广东海洋大学水产学院

出　　处： 《水产学报》 2007年第5期675-681,共7页

摘　　要： 采用模型拟合方法研究了墨西哥湾扇贝（Argopecten irradians concentricus Say）在湛江北部湾水温18．2～30．8℃、盐度27．8～30．4、透明度1．5～5．7m、水深9．7m、浮游植物细胞丰度平均4．3×10^4L^-1、采用“秋冬春”养殖等条件下，一个养殖周期的形态增长规律。结果表明：墨西哥湾扇贝各形态性状生长过程遵循Logistic生长模型，平方复相关系数群均大于0．98（P〈0．001），根均方误差RMSE平均0．897，各形态性状模型都具有统计学意义（ANOVA，P〈0．001）。通过Levenberg-Marquardt迭代法求出模型中3个生长参数，并得出各形态性状的生长极限值为壳长53．8mm、壳高54．6mm、壳宽27．1mm、铰合线长28．4mm、闭壳肌长26．1mm、闭壳肌直径16．2mm；快速生长区间及生长拐点则分别是壳长1．5～5．7个月及3．6个月、壳高1．4～5．9个月及3．6个月、壳宽2．0～6．4个月及4．2个月、铰合线长0．7～4．8个月及2．8个月、闭壳肌长1．9～6．5个月及4．2个月、闭壳肌直径1．6～5．5个月及3．5个月；绝对增长速度为壳长〉壳高〉壳宽〉闭壳肌长〉闭壳肌直径；相对增长速度性状间存在差异并随生长逐渐趋于0。研究发现主要经济性状壳宽及闭壳肌长出现生长延缓、不同地理种群形态增长存在显著差异、形态性状生长速度受温度及生长阶段共同调控等现象。提出了根据壳宽及闭壳肌生长适时收获，及把快速生长期安排在水温最适合生长的季节以最大程度挖掘生长潜能的新观点。研究结果可为墨西哥湾扇贝养殖生态研究、选择育种及养殖生产提供理论指导。 Argopecten irradians concentricus Say, introduced from America, has been extensively cultured in recent years in Beibu bay in Zhanjiang, but the research about its morphological growth is not found to have been reported, this makes the culture of Argopecten irradians concentricus Say lack of the guiding of relevant theory. The morphological growth of Mexican bay scallop （Argopecten irradians concentricus Say ） in Zhanjiang Beibu bay sea area was investigated in this paper by using model fitting procedure under such conditions as seawater temperature ranging from 18.2 ℃ to 30.8℃, salinity ranging from 27.8 to 30.4, limpidity ranging from 1.5 m to 5.7 m, water depth at 9.7 m, average planktonic plant cell abundance at 4.3 × 10^4 cell·L^-1 and the autumn-winter-spring culture mode in which the time span of the investigation was exactly equivalent to one culture cycle of Mexican bay scallop. Results showed that the growth of morphological traits of Mexican bay scallop conformed to Logistic model, with squared multiple correlation coefficient R2 all exceeding 0.98 （P 〈 0. 001 ） and root mean square error （RMSE） averaging out at 0.897. All Logistic models of varying morphological traits were statistically significant （ANOVA, P 〈 0.001 ）. Growth parameters contained in Logistic model, estimated by Levenberg-Marquardt iteration method, could be employed in establishing the growth equations of varying traits of interest. Growth limits and confidence intervals of varying morphological traits of Mexican bay scallop in Zhanjiang sea area were, shell length 53.8 mm, shell height 54.6 mm, shell breadth 27.1 mm, hinge length 28.4 mm, adductor length 26.1 ram, adductor diameter 16.2 ram, respectively ; the fastest growth intervals and growth inflection points of varying morphological traits were, shell length 1.5 - 5.7 months and 3.6 months, shell height 1.4 - 5.9 months and 3.6 months, shell breadth 2 - 6.4 months and 4.2 months, hinge length 0.7 - 4.8 months and 2.8 months, adductor length 1.9 - 6.5 m

关 键 词： 墨西哥湾扇贝 形态 生长模型 生长参数

领　　域： [农业科学] [农业科学]