基于 EVA的鱼类音响驯化装置设计与实验.

Aiming at the domestication demand in the process of proliferation and release of marine ranching,in order to improve the effectiveness,reliability and operation convenience,a fish acoustic domestication device based on EVA material was designed,and the application experiment of the device was carried out. Taking EVA solid material as the floating body,the overall structure of fish domestication device which integrates remote control,acoustic domestication and fish behavior monitoring was designed. The natural feeding angle at the bottom of the hopper was determined according to the characteristics of domesticated bait,and the screw feeding control device is adopted to realize the uniform feeding of bait as required, with the feeding amount of 113 g per minute. The overall average daily power consumption of each subsystem is 27.47 Wh,and a solar energy supply system is designed to meet the needs of regular work of 13 consecutive rainy days. According to the calculation, the metacentric height of the device is 0.37 m, which meets the requirements of the code, and the natural period of rolling is 2.3 s, which avoids the main wave energy frequency, indicating that the device has good wave-following motion characteristics. The acoustic domestication experiment of Oplegnathus fasciatus was carried out. The experiment showed that after 25 times of domestication,taking the aggregation rate of 40% fish in the range of 1 meter in diameter at the domestication point as the standard,the aggregation duration of the control pool was 28 seconds,the aggregation duration of the simple domestication experimental pool was 115 seconds,and the aggregation duration of the integrated domestication experimental pool was 473 seconds. From the perspective of the change of fish aggregation rate,the simple domestication experimental pool tended to be stable at about 49% and finally reached 58% after 12 times of domestication while the integrated domestication experimental pool tended to be stable at about 95% and finally reached 99% after 8 times of domestication. The developed device has been applied in net cages and open sea areas,and good results show its effectiveness and reliability,which provides solid foundation to improve the fries releasing effect. [ABSTRACT FROM AUTHOR]