生殖周期不同阶段两性的二倍体和三倍体鲫鱼（Carassius gibelio）中的性类固醇,Animal Reproduction Science

二倍体和三倍体鲫鱼（Carassius gibelio) 来自 Siemianowka 水库，使用酶免疫测定法对维斯瓦河排水量进行了量化和比较。性腺成熟阶段基于组织学分析和性腺体指数。在分别于 4 月、6 月和 10 月采集的鱼中，所有鱼类在生殖周期的产卵前、产卵和产卵后期阶段均具有正常发育的性腺。二倍体和三倍体雌性和雄性在所有生殖阶段的平均 GSI 没有差异。10月份，大部分雌性的卵巢含有卵黄卵母细胞，睾丸有大量精子。两种组织中的激素浓度主要取决于生殖阶段，而不是倍性。E 2的变化规律女性和男性的浓度相似。在产卵前阶段，二倍体和三倍体雌性在性腺和血浆中的 11-KT 浓度以及血浆中的 T 浓度存在差异。二倍体雄性在性腺和血浆中的 T 浓度模式不同，而所有雄性都表现出相似的 11-KT 血浆浓度模式。在三倍体雄性中观察到的精子表明它们参与了繁殖。无论倍性如何，Gibel 鲤鱼都有较长的繁殖期，这使得这种入侵物种对本地鱼类动物群构成潜在的更大威胁。2 n 和 3 n 雌性之间不同的性雄激素浓度可能是生理因素，可能导致雌性C. gibelio雌性和性二倍体共存。

"点击查看英文标题和摘要"

The changes in concentrations of 17ß-estradiol (E2), testosterone (T), 11-ketotestosterone (11-KT) in the gonads and plasma of diploid and triploid gibel carp (Carassius gibelio) from the Siemianowka Reservoir, the Vistula River drainage were quantified and compared using an enzyme immunoassay. The phase of gonad maturity was based on histological analysis and the gonadosomatic index. All fish had properly developed gonads in the pre-spawning, spawning and late spawning phases of the reproductive cycle in the fish collected in April, June and October, respectively. Diploid and triploid females and males did not differ in mean GSI in all reproductive phases. In October, ovaries of most females contained vitellogenic oocytes, testes had large numbers of spermatozoa. The hormone concentrations in both tissues depended mainly on the reproductive phase, but not on ploidy. The patterns of changes in E2 concentrations was similar in females and males. In the pre-spawning phase, diploid and triploid females showed differences in the concentrations of 11-KT in gonads and plasma, and T in plasma. Diploid males differed in pattern of T concentrations in gonads and plasma, while all males showed a similar pattern of 11-KT plasma concentrations. Spermatozoa observed in triploid males suggest that they participate in reproduction. Gibel carps, regardless of ploidy, had an extended period of reproduction, which makes this invasive species a potentially greater threat to native ichthyofauna. The sex androgen concentrations that differed between 2 n and 3 n females could be physiological factors potentially contributing to the coexistence of gynogenetic C. gibelio females and sexual diploids.