Sexual maturation in triploid male plaice (Pleuronectes platessa) and plaice x flounder (Platichthys flesus) hybrids
Sexual maturation in triploid male plaice (Pleuronectes platessa) and plaice x flounder (Platichthys flesus) hybrids
复制标题
三倍体雄性鲽 (Pleuronectesplatessa) 和鲽 x 比目鱼 (Platichthys flesus) 杂交种的性成熟
DOI：
10.1111/j.1095-8649.1981.tb05845.x
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发表时间：
1981
影响因子：
2
通讯作者：
R. Lincoln
中科院分区：
文献类型：
--
作者：
R. Lincoln
三倍体雄性鲽（Pleuronectes Platesa）和鲽 x 比目鱼（Platichthys flesus）是由冷激卵产生的杂交种，在三岁时饲养至成熟。三倍体杂交鱼的睾丸在宏观外观和大小上与对照鱼的睾丸相似，但在组织学切片中精母细胞和精细胞的形成严重异常。在两条鱼中，大多数细胞似乎是流产的精子细胞和精母细胞，尽管也有一些精子头部增大和粗弯曲的鞭毛。
成熟三倍体鲽鱼的睾丸在形状、大小以及组织学切片上与对照相似。除了细胞和核大小增加之外，精母细胞和精细胞形成正常，并且一些鱼产生了完全活动的精子。与对照相比，用三倍体精液受精的鲽鱼卵的生育力略有下降，但正常发育为原肠胚，死亡率极低。除了原肠胚形成之外，与胚胎外观异常相关的死亡率也在增加。很少孵化，而且存活时间都不超过 48 小时。简要讨论了三倍体在养鱼业中的价值。
Triploid male plaice, Pleuronectes platessa, and plaice x flounder, Platichthys flesus, hybrids produced from cold-shocked eggs were reared to maturity at three years of age. The testes of triploid hybrids were similar in macroscopic appearance and size to those from control fish but in histological section spermatocyte and spermatid cell formation was grossly abnormal. In two fish the majority of cells appeared to be aborted spermatids and spermatocytes although there were some spermatozoa with enlarged heads and thick bent flagellae.
The testes of mature triploid plaice were similar to controls both in shape and size and in histological section. Spermatocyte and spermatid cell formation was normal, apart from an increase in cell and nuclear size, and fully motile spermatozoa were produced from several fish. Plaice eggs fertilized with semen from triploids showed a slight reduction in fertility compared with controls but developed normally to gastrulation with little mortality. Beyond gastrulation there was increasing mortality associated with abnormalities in the appearance of embryos. Few hatched and none of these survived longer than 48 h. The value of triploidy in fish farming is briefly discussed.