【摘要】 选取适宜的标志方法是提高增殖放流效果评估准确性的保障。以我国增殖放流的重要经济鱼类黄鳍棘鲷(Acanthopagrus latus)为实验对象,以其特定生长率、存活率和标志保留率为定量评价指标,采用单因素方差分析和Kaplan-Meier生存分析对比了被动整合雷达标志(PIT)、长T型标志(L-T)、短T型标志(S-T)3种标志方法的标志效果。40 d的实验结果显示,各试验组鱼的特定生长率差异不显著;各试验组鱼的存活率和标志保留率较高,但差异均不显著;存活率表现为PIT标志组(96%)>L-T标志组(94%)>S-T标志组(93%),标志保留率则表现为PIT标志组(100%)>S-T标志组(97%)>L-T标志组(96%)。结合标志材料成本、标志操作难易程度等因素,认为L-T标志是目前黄鳍棘鲷批量化标志放流较理想的一种标志方法。此外,研究所采用的生存分析法可为今后不同标志方法的对比优选提供参考。更多还原

【Abstract】 Overfishing and environmental pollution have led to the depletion/dramatic decline of fishery in the world. China has been making great efforts on sea ranching and stock enhancement, especially in coastal waters. The stock enhancement performance is undoubtly the core concern of the whole ranching systematic project. Mark-recapture helps to estimate the population dynamics and the effects of sea ranching, it can also provide clues for the choice of tagging method. A 40-day experiment was conducted on juvenile Acanthopagrus latus with passive integrated transponder tags（PIT）, long T-bar anchor tags（L-T）, and short T-bar anchor tags（S-T）. Four treatments with two replicates per group were designed, the control group, PIT group, L-T group, and S-T group, and each group had 50 juvenile A. latus. Three indices were applied to evaluate the effectiveness of tagging using one-way analysis of variance and Kaplan-Meier survival analysis, which were specific growth rate, survival rate, and tag retention rate. The results showed that all three indices varied between treatments but without significant differences（P>0.05）. Firstly, the specific growth rate was in a descending order of L-T group(0.57%·d^-1) > control group(0.56%·d^-1) > PIT group(0.53%·d^-1) > S-T group(0.50%·d^-1), but there was no significant difference in the specific growth rate between groups（P>0.05）. Secondly, the survival rate was in a descending order of control group（99%） > PIT group（96%） > L-T group（94%） > S-T group（93%）. Thirdly, the tag retention rate was descending from PIT group（100%） to L-T group（97%） and S-T group（96%）. The application cost for PIT was about RMB 11.0 per individual fish, for L-T was about RMB 5.0 per fish, and for S-T was roughly RMB 4.0 per fish. Considering both the cost and practicability of tags, it is recommended that L-T is the best choice for tagging A. latus in batches, while S-T is more appropriate for fish with less marking information on the tags, and PIT is more applicable when there is sufficient budget and stricter requirements on the accuracy. Furthermore, the survival analysis in this paper provides clues for quantatively evaluating tagging performance.更多还原