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冬季是亲鱼性腺发育的早期,此时期培育的好坏,不仅影响亲鱼的怀卵量,而且决定着翌年春季亲鱼人工繁殖的成败。1.强化培育。随着气温水温的下降,亲鱼摄食能力也随之减弱,日投饲量应相应减少,根据水温状况及亲鱼摄食强度酌情掌握,可遵守“量少次多,不断补充”的原则。通过施肥,使鲢、鳙亲鱼体内积蓄充足营养,以保证开春后亲鱼的正常发育。
Winter is the early stage of gonadal development of broodstock. The quality of breeding during this period not only affects the fecundity of broodstock, but also determines the success or failure of artificial reproduction of broodstock in the following spring. 1. Strengthen the cultivation. With the decrease of temperature and water temperature, the feeding capacity of broodstock will also be weakened. The daily feeding rate should be reduced correspondingly. According to the water temperature and the feeding intensity of broodstock, it is possible to abide by the principle of “less frequent meals and more supplements”. Through fertilization, the silver carp and broodstock have enough nutrients in the body to ensure the normal development of the broodstock after spring.