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Age, growth, reproduction and food of common stingray (Dasyatis pastinaca L., 1758) in Iskenderun Bay, the eastern Mediterranean

机译:地中海东部伊斯肯德伦湾的普通黄貂鱼(Dasyatis pastinaca L.,1758)的年龄,生长,繁殖和食物

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摘要

The age, growth, reproduction, and feeding of common stingray (Dasyatis pastinaca) were studied using 256 specimens from the iskenderun Bay (eastern Mediterranean). Females made up 43% and males 57% of the individuals. The total length of females ranged from 20.5 to 88 cm (8-51 cm DW), and of males from 20 to 73 cm (7-34 cm DW). The total length-weight and disc width-weight relationships were W = 0.00144 x TL3.31 and W = 0.02168 x DW3.26, respectively. The age data, derived from vertebrae readings, were used to estimate the growth parameters of the von Bertalanffy equation: L-infinity = 121.5 cm, K = 0.089, t(0) = -1.615. The maximum age was 10 years. The parturition time of common stingray occurred in summer (from May to September). Males matured at 43 cm TL (22 cm DW) and females at 46 cm TL (24 cm DW). The stomachs contained mainly Crustacea.
机译:使用来自伊斯肯德伦湾(地中海东部)的256个标本对普通黄貂鱼(Dasyatis pastinaca)的年龄,生长,繁殖和摄食进行了研究。女性占43%,男性占57%。雌性的总长度为20.5至88厘米(D-8-51厘米),雄性的总长度为20至73厘米(D-7-34厘米)。总的长度-重量和光盘宽度-重量的关系分别为W = 0.00144 x TL3.31和W = 0.02168 x DW3.26。从椎骨读数得出的年龄数据用于估算冯·贝塔朗菲方程式的生长参数:L-无穷大= 121.5 cm,K = 0.089,t(0)= -1.615。最高年龄为10岁。普通黄貂鱼的分娩时间发生在夏季(5月至9月)。雄性在43厘米TL(22厘米深)处成熟,雌性在46厘米TL(24厘米深处)成熟。胃主要含有甲壳纲。

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