罗氏沼虾养殖成虾缅甸品系与泰国品系的外形特征比较

对罗氏沼虾缅甸品系和多年养殖的泰国品系的养殖成虾进行了外形特征的比较。结果显示:缅甸品系具有头胸部相对较小的特征,其第二步足(螯足)的指节长、掌节长和宽均大于泰国品系,体现了较高的活动性和取食能力。雌体的体重、体长均大于泰国品系,其抱卵量也较大。这些特征体现了罗氏沼虾缅甸品系在养殖和育苗中的优势。泰国品系经过多年来的养殖,仍保持了其许多优良性状,但也出现了品质退化的现象。从目前的情况来看,罗氏沼虾缅甸品系可以作为更新的养殖对象。但仍需加以驯化以适应养殖条件并在养殖过程中稳定其优良性状。

Appearance Comparison of Adult Freshwater Prawn Between Thailand Population and Burma Population

Appearance comparison of adult was made between Thailand population and Burma popluation The results showed that the cephalothorax of Burma population was relatively smaller,and the dactyl length and prododus length of major second pereropod were larger than those of Thailand population,which proved Burma population had stronger activity and ability to get food.And body weight and body length,as well as egg carrying amount of any female of Burma population were larger than those of Thailand population.These characteristics of Burma population proved its dominant position in culture and breeding.After being cultivated for years,Thailand population still remained some fine characteristics.However,some quality deterioration also appeared to Thailand population.Nowadays,Burma population could be considered as a new cultivated population.Keeping the fine characters of Burma population is needed in the process of cultivation.