厦漳近海角突仿对虾数量分布及生物学特性研究

Research on Quantitative Distribution and Biological Characteristic of Parapenaeopsis cornuta in Xiamen and Zhangzhou Coastal Waters

根据2018年10月(秋季)和2019年4月(春季)在福建厦门和漳州近海(118°0′-119°0′E,24°0′-24°30′N)拖网定点调查资料,分析了该海域角突仿对虾数量的时空分布,并对其主要生物学特性进行了研究。结果显示,调查海域角突仿对虾年平均渔获率为234.4 g·h^(-1),春季略高于秋季,季节变化不明显(P>0.05)。角突仿对虾数量分布呈现春季近岸站点渔获率高,深水站点渔获率低,秋季则呈现相反的特点。最高值出现在秋季的ST18站,为1287.6 g·h^(-1)。角突仿对虾春、秋季体长均值和体质量均值差异不明显(P>0.05);体长(L)和体质量(W)的关系为W=1.644×10^(-5) L^(2.919);雌雄比为1:0.70;雌性个体性腺成熟度以Ⅱ期和Ⅲ期为主,分别占45.45%和32.73%;摄食等级以1级最多,2级次之。

Based on the data of fisheries resource survey from Xiamen and Zhangzhou coastal waters in Fujian in October(Autumn)2018 and April(Spring)2019,spatial-temporal distribution of quantity and biological characteristic of Parapenaeopsis cornuta were analyzed.The results showed that the annual average catch rate of P.cornuta in the survey areas were 234.4 g·h^(-1),which one in spring were higher than autumn,with no obvious differences in two seasons(P>0.05).The quantitative distribution of P.cornuta showed the characteristics of high catch rate at offshore sites in spring,low catch rate at deep water sites,and opposite in autumn.The highest value(1287.6 g·h^(-1))of catch rate appeared at ST18 station in autumn.There was no significant difference in the mean of body length and body weight of P.cornuta in spring and autumn(P>0.05).The relationship between body length(L)and body weight(W)was W=1.644×10^(-5) L^(2.919).The gender ratio of was 1:0.70.Gonadal maturity in female individuals was mainly stage II and stage III,accounting for 45.45%and 32.73%,respectively.The highest feeding intensity level of P.cornuta was grade 1,followed by grade 2.