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  • 05 Technical Publications and Reports on Fishing Technologies and Practices, and Navigations
  • Fishing Gears and Methods
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Intensity of Luring Light for Squid Lift-Net Fisheries in Thailand

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TDRES02_Squid_LiftNet_TH.PDF (1.471Mb)
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Date
1985-05
Author
Michio, Ogura
Takafumi, Arimoto
Shigeo, Hayase
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556
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Abstract
Net fishing with light has made a great progress in the Gulf of Thailand and as a result, the power of fishing lights has been increasing year by year. However, There is very little information concerning the attracting effects of light in water.

The present paper is a brief report on calculation of light intensity in water by application of a theoretical model about the light of this report, visited the Training Department, SEAFDEC, form 15 or 25 August, 1981, as a short-term expert on fish luring lamp. On his return request, the report has been translated into English and rearranged of the Training Department, SEAFDEC.

Three sets of data wear available for the calculation of fishing light source form the sea level, and transparency of water . Some aspects which affect the light intensity such as the arrangement of lamps on board or the differential sizes of boats wear not taken into consideration. Therefore, more detailed data, such as the attenuation rate of light or actual lumen values which are used the field conditions are necessary for practical purposes, Furthermore, there is a lack of fundamental information of the actual method of operation for catching squid. For example, the depth where the net is shot or the attracting effect of light in conjunction with the behavior of squid responding to light cannot yet be established categorically. Therefore, the present study is limited to the estimation of distribution of light intensity in water.
URI
http://hdl.handle.net/20.500.12067/213
Subject
Luring Light; Squid Lift-net Fisheries; Lift Net; Thailand
Collections
  • Fishing Gears and Methods [70]

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