莱州湾放流中国对虾的跟踪调查及其生长研究

Tracking Surveys and Growth Study of Released Fenneropenaeus Chinensis

本文通过回捕跟踪调查,对莱州湾海域中国对虾放流后的移动和生长进行了初步研究。结果显示:随着中国对虾的不断生长,放流群体逐渐由河道向莱州湾近岸浅水区、莱州湾内部深水区和湾外移动;各采样批次的中国对虾体长频率分布多为单峰类型,体长(L)-体重(W)关系式为W=8.0×10^(-6)L^(3.0611);von Bertalanffy生长方程分别为Lt=201.57×[1e^(-0.016(t-38.48))]和Wt=90.61×[1e^(-0.016(tS-38.48))]^(3.0611);体长和体重生长速度方程分别为dLt/dt=3.23×e^(-0.016(t-38.48))和dW_t/dt=4.44×e^(-0.016(t-38.48))×[1e^(-0.016(t-38.48))]^(2.0611),其中体重生长拐点出现在放流后三个月左右(108d日龄,8月15日)。

The movement and growth of released F. chinensis into Laizhou Bay were investigated through several tracking surveys. The results showed that released F. chinensis populations moved out from Wei River to shallow coastal waters after getting a bigger body, and fuether to deeper waters until they finally left Laizhou Bay. Body-length frequency distribution of different sampling batches was almost unimodal. The relationship of body-length （L） and body-weight （W） could be expressed as W=8.0×10^-6L^3.0611. Body-length and body-weight von Bertalanffy function were L1=201.57×[1e^-0.015（t-38.48）] and Wt=90.61×[1e^-0.046（tS-38.48）]^3.0611 , respectively. The growth rate equations on body-length and body-weight were dLt/dt=3.23×e^-0.016（t^-38.48） and dWt/dt=4.44×e^0.016（t-38.48）×[1e^-0.016（t-38.48）]^2.0611, respectiveky. Besides, the growth inflection point occurred when the shrimp was 108 days old on August 15.