芙蓉鲤鲫(芙蓉鲤♀×红鲫♂)的性腺组织学及繁殖性能研究

Gonadal structure histology and reproduction performance of Furong crucian carp(Cyprinus capio furong.♀×Carassius auratus red var.♂)

采用解剖观察、组织切片及人工催情等方法,研究芙蓉鲤鲫(Cyprinus capiofurong.♀×Carassius auratus red var.♂)的性腺发育及繁殖性能。结果显示:解剖观察,芙蓉鲤鲫性腺发育异常的个体占83.64%,性腺外观基本正常的个体占16.36%。组织学观察,芙蓉鲤鲫性腺可分三类:两性嵌合体占21.13%,其中以精巢为主的16.90%,以卵巢为主的4.23%,它们性腺发育迟缓,在繁殖季节成熟系数也没有明显变化,性腺多为一侧发育或两侧不对称,两种性腺细胞均不能成熟;雌性个体占40.84%,在生殖季节卵巢可发育到第IV时相,但未见其细胞核发生偏移;雄性个体,占38.03%,在生殖季节只能发育到精子细胞阶段,不能产生成熟的精子。经人工催产,芙蓉鲤鲫少部分个体有发情产卵行为但不能正常受精。结果表明芙蓉鲤鲫为两性败育类型。

The gonadal structure histology and reproduction performance of Furong crucian carp were studied by dissection,tissue slice observation and artificial induced breeding.The dissection results showed that gonad of Furong crucian carp could divided into two types individuals with abnormal gonad were 83.64%,and that with normal gonad were 16.36%.The tissue slice observation results showed that the gonadal histology could be divided into three types：（1） About 21.13% of total population were hermaphroditic masias,and testis dominated 16.90%,which ovary dominated 4.23%.（2） Female individuals were 40.84%.（3） Male individuals were 38.03%.A few individuals could be observed the oestrus and ovulation behaviour after artificial induced breeding,but the oocytes could not be fecundated normally.These results concluded that neither male nor female of Furong crucian carp have fertility.