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根据2007年—2010年间两个航次的调查采集的热带大西洋公海海域(05°37′N~14°59′N,29°00′W~40°54′W)金枪鱼延绳钓兼捕的锯鳞四鳍旗鱼(Tetrapturus pfluegeri)渔业和生物学数据,研究了锯鳞四鳍旗鱼的长度组成、各长度之间和长度重量之间关系、性比、性腺成熟度及性腺指数。研究表明,锯鳞四鳍旗鱼的兼捕率为0.06170尾/千钩,雌雄下颌叉长(LJFL)分布不存在显著差异(K-S test,P>0.05)。雌雄锯鳞四鳍旗鱼下颌叉长(LJFL)与下颌体长(LJPCL)、下颌全长(LJTL)的关系呈线性显著相关(t-test,P<0.01),关系方程分别为:LJPCL=0.9065LJFL+4.5299;LJTL=1.0606LJFL+10.303。锯鳞四鳍旗鱼下颌叉长(LJFL)与体重的关系呈对数线性显著(t-test,P<0.01),关系方程为:RW=5.9162×10~(-6) LJFL2.9292。雌雄锯鳞四鳍旗鱼性比为1:1.33,雌性锯鳞四鳍旗鱼性腺成熟度以Ⅴ期占优势,平均性腺指数为1.11;雄性锯鳞四鳍旗鱼性腺成熟度以Ⅰ期占优势,平均性腺指数为0.16。兼捕的锯鳞四鳍旗鱼中有70%是在300m以上水层钓获的。
According to the survey of two voyages between 2007 and 2010, Tuna longline fishing and by-catch saws were collected in the high seas of the tropical Atlantic (05 ° 37’N ~ 14 ° 59’N, 29 ° 00’W ~ 40 ° 54’W) Tetrapturus pfluegeri fishery and biology data to study the length of the Sauroprof four finned sailfish, the length of the relationship between length and weight, sex ratio, gonadal maturity and gonadal index. Studies have shown that the co-capture rate of Sawgrass-4 finfish is 0.06170 hams / haft, and there is no significant difference in the distribution of LJFL (K-S test, P> 0.05). The relationship between LJFL and LJPCL and LJTL was linearly correlated (t-test, P <0.01). The relational equations were LJPCL = 0.9065LJFL + 4.5299; LJTL = 1.0606LJFL + 10.303. The relationship between LJFL and body weight was logarithmically linear (t-test, P <0.01). The relational equation was: RW = 5.9162 × 10 -6 LJFL2.9292. The sex ratio of male and female Saw scales was 1: 1.33. The gonad maturity of female Saw scales was predominant in phase Ⅴ, with an average gland index of 1.11. The gonad maturity of male Saw scales Advantages, the average gonadal index of 0.16. 70% of the by-catch sawfly four-finned sailfish are caught in a water layer above 300m.