在进行鲢鱼人工催产繁殖选择亲鱼时,常发现有部分雌亲鱼的性腺发育良好,腹部膨大,卵巢轮廓明显,但其生殖孔发炎肿胀,呈深红色而突出,开口很小,有的甚至溃烂。这样的雌亲鱼在注射催产药物后,会因生殖孔(输卵管)堵塞而产不出卵来,造成难产,并因此引起亲鱼的死亡。对此,笔者曾多次采取在注射催产药物的同时结合进行手术处理的办法,可使亲鱼正常产卵,避免发生难产,减少亲鱼的死亡。 In the selective breeding of silver carp artificial broodstock, it is often found that part of the female fish gonadal development, abdominal enlargement, ovarian contour obvious, but its reproductive pores inflamed swollen, dark red and prominent, the opening is small, and some even fester . Such female fish after injection of oxytocin drugs, will be blocked by the reproductive orifice (fallopian tube) and produce eggs, causing dystocia, and thus cause the death of broodstock. In this regard, I have repeatedly taken in the injection of oxytocic drugs combined with surgical treatment approach can make the normal laying of brood fish, to avoid childbirth and reduce the death of broodstock.