The effect of lunar cycle, tidal condition and wind direction on the catches and profitability of Japanese common squid Todarodes pacificus jigging and trap-net fishing
The effect of lunar cycle, tidal condition and wind direction on the catches and profitability of Japanese common squid Todarodes pacificus jigging and trap-net fishing
复制标题
月球周期、潮汐条件和风向对日本鱿鱼Todarodes pacificus 跳汰和网捕渔获量和盈利能力的影响
DOI：
10.1007/s12562-014-0799-6
复制
发表时间：
2014
影响因子：
1.9
通讯作者：
Daisaku Masud; Shuya Kai; Naotoshi Yamamoto; Yoshiki Matsushita; Petri Suuronen
中科院分区：
文献类型：
--
作者：
Ahamed F.;Z;F;Ahmed;M. Y. Hossain and J. Ohtomi;Hiroshi Shono;串崎 康文，松下吉樹;松下吉樹;Daisaku Masud; Shuya Kai; Naotoshi Yamamoto; Yoshiki Matsushita; Petri Suuronen
人工灯光钓捕（鱿鱼钓捕）和大型诱捕网（日本又称定置网）是日本西部地区捕捞日本普通鱿鱼的主要方法。鱿鱼钓是一种高度选择性的捕捞方法。然而，它消耗大量的能量用于蒸汽到渔场和照明。相比之下，陷阱网捕鱼需要的能量少得多，但其捕获效率受到其固定捕获方式的强烈影响。本研究的主要目的是分析各种环境和生物因素，如月球周期，潮汐条件，风向和鱿鱼丰度如何影响鱿鱼钓和陷阱网捕捞的捕获效率。我们分析了这些因素对日本西部长崎县四个岛屿上五个渔业合作协会鱿鱼捕捞量的影响。分析结果表明，月运周期是影响柔鱼钓捕量的主要因素，潮汐和风向也起着重要作用。此外，鱿鱼的丰富程度对陷阱网捕鱼的渔获量有很大影响。建议通过适当选择捕捞方法、地点和季节来提高鱿鱼捕捞的总体利润。
Jigging with artificial lights (squid jigging) and deploying of large scale trap-net (also known as a set-net in Japan), are the major methods to capture Japanese common squidTodarodes pacificusin western Japan. Squid jigging is a highly selective fishing method. However, it consumes large amount of energy for steaming to the fishing ground and for lighting. In contrast, trap-net fishing requires substantially less energy but its capture efficiency is strongly influenced by its stationary mode of capture. The primary objective of this study was to analyze how various environmental and biological factors such as the lunar cycle, tidal condition, wind direction and squid abundance affect the capture efficiency of squid jigging and trap-net fishing. We analyzed the effect of these factors on squid catch in five Fisheries Cooperative Associations located on four islands in Nagasaki Prefecture, western Japan. Our analysis shows that squid catch in jigging and trap-net fishing is mainly influenced by the lunar cycle but also tide and wind direction play a marked role. In addition, squid abundance significantly affects the catches in trap-net fishing. Recommendations are made to improve the overall profitability of squid fishing by proper choice of the capture method, location and season.