| 怒江源头地区那曲河热裸裂尻鱼繁殖生物学研究 |
| Reproductive Biology of Schizopygopsis thermalis Herzenstein from Naqu River, Nujiang River Headwaters |
| 投稿时间：2022-05-26 修订日期：2022-08-30 |
| DOI：10.15928/j.1674-3075.202205260194 |
| 中文关键词:热裸裂尻鱼 繁殖力 怒江源头 那曲河 |
| 英文关键词:Schizopygopsis thermalis Herzenstein fecundity Nujiang River headwaters Naqu River |
| 基金项目:农业部“西南重点水域渔业资源与环境调查专项”；中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金（2023TD09）。 |
|
| 摘要点击次数: 84 |
| 全文下载次数: 9 |
| 中文摘要: |
| 了解怒江源头地区那曲河热裸裂尻鱼基础生物学概况，研究其繁殖生物学，可为评估热裸裂尻鱼生态适应性规律、进行资源管理和物种保护提供理论依据。2017年9月、2018年7月和10月在怒江源头那曲河采集309尾热裸裂尻鱼（Schizopygopsis thermalis Herzenstein），进行了生物学参数测定，包括年龄、体长、体重、繁殖力，计算了性比、性腺成熟系数，评估了性成熟年龄，预测了产卵类型。结果显示：热裸裂尻鱼个体绝对繁殖力（F）为2 943~16 657粒，平均（7 685±3 526.66）粒；个体体长相对繁殖力（FL）为10.15~52.71粒/mm，平均（25.00±10.57）粒/mm；个体体重相对繁殖力（FW）为10.68~48.01粒/g，平均（23.91±8.21）粒/g。个体繁殖力与各基础生物学指标的相关性分析显示F、FL与体长、体重、空壳重、卵巢重、年龄和丰满度之间达到了极显著性相关（P<0.01），与性腺成熟系数无显著性相关（P>0.05），FW仅与卵巢重和性腺成熟系数具有相关性（0.01
|
| 英文摘要: |
| Schizopygopsis thermalis Herzenstein, belonging to Schizothoracinae, Cyprinidae and Cypriniformes, is a fish species endemic to the Tibetan Plateau and primarily distributed in the Danggula Mountains and Nujiang River system. This article describes the reproductive features of S. thermalis Herzenstein in Naqu River of the Nujiang River headwaters. Our objective was to provide a theoretical basis for assessing the adaptability, management, and conservation of the species. A total of 309 S. thermalis Herzenstein specimens were collected in Naqu River in September 2017, and July and October 2018. The body length and weight of the specimens were measured in situ, otoliths and gonads were collected for identification of age, sex and gonad development stage, and 36 female S. thermalis Herzenstein with ovaries at stage IV were selected for determination of fecundity. The population size, interspecific and intraspecific differences in reproductive capacity, and the spawning types of S. thermalis Herzenstein were then analyzed based on the results. The ranges in body length, body weight, ovary weight, and fatness were 34-392 mm, 0.45-617.75 g, 0.18-40.78 g，0.50-1.50 g/cm3, and the mean±SD values were （199.9±81.7 ）mm, （164.10±157.98） g, （11.38±9.95） g, and （1.07±0.13）g/cm3. The range of absolute fecundity (F) of S. thermalis Herzenstein was 2 943-16 657 eggs and averaged 7 685±3 526.66 eggs, and the range for relative fecundity by weight (FW) was 10.68-48.01 eggs/g and, by length (FL), 10.15-52.71 eggs/mm, with average values of （23.91±8.21 ）eggs/g and （25.00±10.57）eggs/mm. Among the 309 samples, the sex of 151 individuals were identified, with 111 females and 40 males, resulting in a female-to-male ratio of 2.78:1, and the coefficient of gonadal maturity ranged from 0.39% to 11.75%. All specimens were in the age range of 1-11 years, and the minimum age of sexual maturity for females was 6 years and that of males was 4 years. The diameter distribution of eggs indicates that?S. thermalis Herzenstein spawns once annually, exhibiting a completely synchronous and single spawning each year. Correlation analysis between individual fecundity and various biological parameters showed that F and FL were highly correlated with body length, body weight, empty shell weight, ovary weight, age and fatness (P<0.01), but the correlation with gonadal maturity coefficient was not significant (P>0.05). FW was correlated only with ovary weight and gonadal maturity coefficient (0.01
|
| 朱峰跃,李 钊,王 起,段辛斌,陈大庆,刘绍平,刘明典.2024.怒江源头地区那曲河热裸裂尻鱼繁殖生物学研究[J].水生态学杂志,45(6):145-151. |
| 查看全文 查看/发表评论 下载PDF阅读器 HTML |
|
|
|
