摘要
根据2014年5月和2016年4月灯光罩网船在南沙海域生产调查采集的鲣(Katsuwonus pelamis)样本,对其渔业生物学特性进行初步研究。结果显示,渔获物优势叉长为260~280 mm,占14.68%;优势体质量为27~100 g,占18.35%;叉长与体质量关系参数b值为3.403 9。雌、雄性比约为1∶0.9;性腺成熟度以Ⅰ期(47.71%)和Ⅳ期(27.06%)为主,随着叉长的增大,雄性个体所占比例上升。性腺发育个体性腺长与叉长呈显著性正相关关系(P<0.01);初次性成熟叉长为392.70 mm;摄食等级以1级和2级为主,分别占36.24%和29.36%,1~4级有逐渐减少的变化趋势;饱满度指数为0.74~7.45,均值为2.53。
We investigated the biological characteristics of Katsuwonus pelamis which were collected by light-falling net fishery in the Nansha Islands sea area in May 2014 and April 2016. The results show that the dominant fork length ranged from 260 mm to 280 ram, accounting for 14. 68% of the total samples. The dominant body weight ranged from 27 g to 100 g, accounting for 18.35% of the total samples. The somatic growing parameters （b value） between fork length and body weight was 3. 403 9. The sex ratio of female to male was 1 ： 0. 9, and the sexual maturity was higher at Stage I （47.71%） and IV （27.06%） , and the proportion of males increased with increasing fork length. Gonad length was positively correlated with fork length significantly （ P 〈 0. 01 ）. The fork length of the first gonadal maturity was 392.70 mm. Stage 1 and Stage 2 had the highest feeding intensities, accounting for 36.24% and 29.36% of the total samples, respectively. A descending trend was found from Stage 1 to Stage 4. The plumpness index ranged from 0. 74 to 7.45 （ averagely 2. 53 ）.
出处
《南方水产科学》
CAS
CSCD
北大核心
2017年第4期34-41,共8页
South China Fisheries Science
基金
国家重点基础研究发展计划(973计划)项目(2014CB441500)
农业部财政重大专项(NFZX2013)
中国水产科学研究院南海水产研究所中央级公益性科研院所基本科研业务费专项资金资助(2012YD03)
关键词
鲣
生物学特性
南沙海域
Katsuwonus pelamis
biological characteristics
the Nansha Islands sea area
