电驱虾捕捞技术的初步研究

THE PRELIMINARY STUDY ON TECHNOLOGY IN CATCHING SHRIMPS BY USING ELECTRICAL DEVICES

海虾有陷于沙中,昼伏夜出的习性。因此一般拖网捕虾的产量,夜间比白夫高。为了提高白天拖网捕虾的生产效果,本文报道了利用电刺激虾体来配合拖网捕虾的试验成果。 试验通过对七百多尾墨吉对虾,用不同参数电刺激,探讨了虾在电刺激状况下的生理反应,得出了驱赶墨吉对虾的最佳电参数;讨论了设备和电极在海水中形成的电场强度分布情况。最后,简略介绍了试捕实践情况。

The behavier of shrimps is that they keep hidden at day while active at night, sothat the yield of the traditional shrimp catching at night is much higher than at day- time. For the purpose increase yield at the daytime, fishing engineers in our countryand abroad attempt to improve the fishing gear by the combination of electrical deviceswith nets. It seems effective in shrimp catching. By analysing the data derived from tbe electrical experiments of more than 700Penaeut mesquiensis, this article emphatically deals with the physiological response ofshrimps to different electrical strength and it is found that the optimal electrical intensityfor driving shrimps from substratum is a D. C. pulsation at 1--5 IIz (frequency) and theelectrodes are apart 0. 2--1. 0 M (width); but it is variable with the length of shrimps andthe angle of direction in electrical field. Other aspects relate to electrical device withdifferent powers, and the information of distribution in field intensity caused byelectrodes are also discussed.