摘要
利用2005年(1—12月)伯利兹船队在帕劳群岛共和国生产作业的渔捞日志数据,采用方差分析的方法(ANOVA)比较了月光天(农历初八至二十二)与月黑天(初一至初七、初二十三至三十)、不同投绳时间之间大眼金枪鱼Thunnus obesus和黄鳍金枪鱼Thunnus albacares渔获率的差异。结果表明:大眼金枪鱼、黄鳍金枪鱼渔获率在月光天和月黑天均无显著性差异;大眼金枪鱼渔获率在不同投绳时间存在显著性差异,而黄鳍金枪鱼的渔获率则无显著性差异。研究认为,月相对大眼金枪鱼、黄鳍金枪鱼渔获率无显著影响。为了获得较高的大眼金枪鱼渔获率,实际作业中应选择02:00—08:00(当地时间)作为投绳时间。
The fishing logbook data of Belize fishing fleets in waters near the Republic of Palau Islands in 2005（January to December） and the difference in the catch rates of bigeye tuna（Thunnus obesus） and yellowfin tuna（Thunnus albacares） with different setting times and the difference in the moonlight days（8th-22nd,lunar calendar） and the no-moonlight days（23rd-7th,lunar calendar） were analyzed by the use of ANOVA to evaluate the effects of lunar phases and setting time on the catch rates of bigeye tuna and yellowfin tuna,and to determine the optimum time of setting the longline to increase the fishing efficiency.The results showed that there was no significant difference in the catch rates between moonlight days and the no-moonlight days.However,there was significant difference between two different setting times for the catch rates of bigeye tuna.For the catch rates of yellowfin tuna,however,there was no significant difference between two different setting time,indicating that the lunar phases did not show significant effect on the catch rates of bigeye tuna or yellowfin tuna.The optimum time of the long line setting was found to be 02：00-08：00（local time） to increase the catch rates of bigeye tuna.
出处
《大连水产学院学报》
CSCD
北大核心
2010年第3期214-218,共5页
Journal of Dalian Fisheries University
基金
上海市重点学科建设项目(S30702)
深圳市联成远洋渔业有限公司资助项目(技05-26)
国家"863"计划项目(2007AA092202)
关键词
渔获率
大眼金枪鱼
黄鳍金枪鱼
月相
投绳时间
catch rate
Thunnus obesus
Thunnus albacare
lunar phase
setting time
