Optimum Light Source Output - Squid Jigging Boats

[glen]

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.