【摘要】 定置网具是1种被动过滤性渔具,其渔获效果往往受水流、底质以及季节等因素的影响。为了改进传统的定置网具,本试验参考定置张网、多门网箱簖以及底层鱼诱捕定置网箱等定置网中拦网、八字门的设计参数,结合本次试验条件设计了由拦网、八字门组成的模型网,研究了鲤、草鱼在400 Hz矩形波连续音的刺激下对该模型网的行为反应,探讨了音响驯化技术与定置网具相结合的联合渔法中拦网、八字门的相关参数以及开发新渔具、渔法的可行性。结果表明,鲤、草鱼在声音刺激下能够通过模型网至聚集区内聚集,其平均开始进入拦网时间分别为76.9和89.4 s;平均开始进入八字门时间分别为79.3和71.2 s;平均开始聚集时间分别为120.0和96.0 s;平均聚集时间分别为125.8和87.8 s;平均聚集率为76.5%和84.2%。由此可见,结合音响驯化技术能够提高定置网具的捕捞效率。更多还原

【Abstract】 Stationary-nets are passive and filtering nets, whose capture effect is often affected by current and bottom conditions.To improve the traditional stationary-net,a model net was designed on the basis of the design parameters of block nets and trapezoid-shaped nets in stationary nets,such as extension nets,multidoor cage weirs and bottom fish cages,and in combination with the laboratory condition,and the behavioral response of carp Cyprinus carpio and grass carp Ctenopharyngodon idellus to the model net was studied by means of acoustic taming using rectangular continuants of 400 Hz in the laboratory,and the related parameters of this combined fishing method was discussed and its feasibility investigated.The results showed that carp Cyprinus carpio and grass carp Ctenopharyngodon idellus could pass the model net to the aggregation area and aggregated.The average starting times of entering the block net were 76.9 s and 89.4 s;the average starting times of entering the trapezoid-shaped door were 79.3 s and 71.2 s;the average starting times of aggregation were 120.0 s and 96.0 s;the average times of aggregation were 125.8 s and 87.8 s;and the average aggregation ratios were 76.5% and 84.2%,respectively,implying that the technique of acoustic taming can enhance the capture ratio of stationary nets.更多还原