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1 引言 罗非鱼（Oreochromis spp.）是温水性养殖的理想种类。罗非鱼生长快,对营养和水质的适应范围广,具有相对强的免疫力和良好的肉质。但因其性早熟且难以控制,从而造成在池塘环境大面积养殖时,劣质的幼鱼新成员妨碍大鱼原始家系的生长。鉴于雄性个体明显
1 INTRODUCTION Oreochromis spp. Is an ideal species for warm-water farming. Tilapia grow fast, adapt to a wide range of nutrition and water quality, with relatively strong immunity and good flesh. However, because of precocious puberty and hard to control, new members of poor quality juvenile fish hamper the growth of the original family of big fish in large-scale pond environment. Given the obvious male individual