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Optimum Light Source Output - Squid Jigging Boats - Printable Version +- Squidfish Forums (http://www.squidfish.net/forums) +-- Forum: Squid Fishing Central (http://www.squidfish.net/forums/forum-3.html) +--- Forum: Commercial Squid Fishing (http://www.squidfish.net/forums/forum-23.html) +--- Thread: Optimum Light Source Output - Squid Jigging Boats (/thread-2398.html) |
Optimum Light Source Output - Squid Jigging Boats - glen - 21-06-2004 TI: Title Analysis of the optimum light source output and lighting management in coastal squid jigging boat. AU: Author Choi, Sokjin; Nakamura, Yoshihiko SO: Source Fisheries engineering (Japan)/Suisan Kogaku (Japan). Ibaraki [Fish. Eng. (Japan)/Suisan Kogaku (Japan)]. Vol. 40, no. 1, pp. 39-46. Jul 2003. AB: Abstract Daily catch data of coastal squid jigging boats, their light source output for fishing lamps and monthly mean wholesale prices of squid were collected from five fishing ports (Hakodate, Sado Island, Noto, Sakaiminato, and Tsushima) in Japan, for a purpose of evaluating optimum light source output, which created a maximum economic yield. The daily income were estimated from the relationship between daily catch data and monthly mean wholesale prices of squid. Then, the optimum light source output was calculated from the relationship between daily income and daily lighting expenses by each fishing management conditions. The results show that daily income and daily lighting expenses were significantly increased as light source output for fishing lamps were increased. The lower light source output which obtained by each fishing management conditions was advantageous when lighting cost become more expensive or wholesale price become cheaper then ever. |