Abstract: The biological characteristics of albacore Thunnus alalunga,including body length frequency,sex ratio,and food were analyzed by the data collected by Chinese tuna longline operation in the southern and central Indian Ocean from September of 2008 to April of 2009.The results showed that the fork length(LF) ranged from 74 to 120 cm with predominant 105-110 cm(47.8%),and with mean LF of(107.2±4.99) cm.The relationship between fork length and dressed weight(WD) for both sex of albacore can be expressed as WD=1.7146×10-5L3.0197F for female,WDM=7×10-5L2.7229FM,and WDF=2×10-6L3.5354FF for male.The gonads were mainly developed into stage IV(about 43.1%) during the survey.The stages 0 and 2 were found in feeding stages for the fish with fork length of below 100 cm,most(over 39%) of which had empty stomach.The fish with fork length of 100-120 cm,however,had an increase in the stomach fullness,and a decrease for the fish with fork length of 91-110 cm and 111-120 cm.
李攀, 许柳雄, 朱国平, 陈锦淘. 印度洋中南部长鳍金枪鱼生物学特性的研究[J]. 大连海洋大学学报, 2010, 25(3): 248-252.
LI Pan, XU Liu-xiong, ZHU Guo-ping, CHEN Jin-tao, . Biological characteristics of albacore Thunnus alalunga in the southern and central Indian Ocean. Journal of Dalian Ocean University, 2010, 25(3): 248-252.