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Optimum Light Source Output - Squid Jigging Boats


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#1 glen

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Posted 21 June 2004 - 02:53 PM

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.
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