逃逸美国红鱼在浙江海域生长特性的初步研究

Preliminary study on growth characteristics of escaped red drum Sciaenops ocellatus in Zhejiang sea area

根据2004-2006年采集的浙江海域156尾美国红鱼的生物学测定资料，分析了该鱼种可量性状间关系，回归得出全长一体长、体重一纯重、体长一体重关系，并比较分析了其他研究者的结果。采用美国红鱼矢耳石磨片法鉴定年龄，并用FiSATII软件拟合得出von-Bertalanffy生长方程，其中：BL∞=951．09mm，k=0．27，t0=0．57；TL∞=1144．61mm，k=0．26，t0=0．52；WB∞=14468．07g，结合生长拐点（tx-4．514）、生长特征指数（Φ’BL=5．388）及肥满度指标（Q=1．82）。比较分析不同生态环境下美国红鱼的生长情况，表明浙江海域美国红鱼生长特性最接近于美国自然海区，浙江海域适合其生长，一旦形成种群可能会对本地种造成威胁。

Study on the main biological characteristics of Sciaenops ocellatus in Zhejiang sea area was conducted on fish samples collected in 2004-2006. We obtained the regression e- quations of total length-body length, body weight-net weight, and length-weight, as well as the von-Bertalanffy growth equation （BL∞=951.09mm,k=0.27,t0=0.57;TL∞=1144.61mm,k=0.26,t0=0.52;WB∞=14468.07g,tx=4.514 ,Φ＇BL=5.388 ） and relative fatness index （Q= 1.82） by analyzing measurable characteristics and age. Compared to previous studies, it was concluded that S. ocellatus has adapted well to the sea area of Zhejiang, and achieved simi- lar growth rate as those in the American sea areas. Once the S. ocellatus reproduce massively, it may pose a potential threat to the endemic species of this area.