大渡河中游齐口裂腹鱼繁殖时间及其主要影响因素分析  

REPRODUCTION TIME AND MAIN INFLUENCING FACTORS OF SCHIZOTHORAX PRENANTI IN THE MIDDLE REACHES OF THE DADU RIVER

作　　者：严太明[1,2] 高阔 刘小帅 王宇峰[1] 杨婷 胡佳祥[1] 唐子婷 杨德英 张明旺[1,2] 何智 YAN Tai-Ming;GAO Kuo;LIU Xiao-Shuai;WANG Yu-Feng;YANG Ting;HU Jia-Xiang;TANG Zi-Ting;YANG De-Ying;ZHANG Ming-Wang;HE Zhi(College of Animal Science and Technology,Sichuan Agricultural University,Chengdu 611130,China;Observation and Research Station of Sichuan Province of Fish Resources and Environment in Upper Reaches of the Yangtze River,College of Animal Science and Technology,Sichuan Agricultural University,Chengdu 611134,China)

机构地区：[1]四川农业大学动物科技学院,成都611130 [2]长江上游鱼类资源与环境四川省野外科学观测研究站,成都611130

出　　处：《水生生物学报》2025年第3期47-54,共8页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金(31972777和31402286);生态环境部生物多样性调查评估项目(2019HJ2096001006)资助。

摘　　要：为了解天然条件下齐口裂腹鱼(Schizothorax prenanti)的繁殖规律,文章采用耳石日轮技术对2012—2014年采自大渡河中游的齐口裂腹鱼仔稚鱼样本进行了出膜期推算,并在此基础上结合胚胎发育积温和水文因子等分析了亲鱼产卵时间及其影响因素。结果表明:在人工养殖条件下的齐口裂腹鱼胚胎发育积温是1467.36℃·h。采集的仔稚鱼出膜时间为11月30日至次年的4月19日,并由此推算出其亲本产卵时间为11月8日至次年的4月11日,繁殖高峰期为1月上旬至3月中旬。相关性分析发现,亲鱼的繁殖活动与流量、水温、气温、降水量、含沙量和水位呈显著负相关(P<0.05),亲鱼产卵时间和仔鱼出膜时间主要集中于流量小、水温低、水位小、降水少和含沙量小的11月至次年4月的枯水期时段。频繁或集中的流量波动,能更好地刺激齐口裂腹鱼进行产卵活动。研究结果为齐口裂腹鱼野生种群繁殖规律研究及其资源保护措施制定等提供基础数据。In order to understand the natural spawning pattern of Schizothorax prenanti,we calculated the hatching period of S.prenanti larvae and juveniles collected from the middle reaches of the Dadu River from 2012 to 2014.The spawning period of the parent fish was determined by integrating the accumulated temperature required for fertilized egg development.Additionally,we conducted an analysis of the correlation between hydrological factors and their spawning activity.The results showed that the incubation accumulated temperature for fertilized eggs of S.prenanti under artificial breeding conditions was 1467.36℃·h.The hatching time for collected juvenile fish spanned from November 30th to April 19th of the following year,and the estimated spawning time was from November 8th to April 11th of the following year.The peak spawning period occurred from early January to mid-March.Correlation analysis revealed a negative association between the reproductive activities of parent fish and various factors,including flow,water temperature,air temperature,precipitation,sediment concentration and water level(P<0.05).The spawning time of parent fish and the hatching time of larvae predominantly coincided with the dry season from November to April cha-racterized by low flow,water temperature,water level,precipitation,and sediment concentration.Notably,frequent or more concentrated flow fluctuations appeared to better stimulate the spawning activities of S.prenanti.These results provide basic data for comprehending the reproductive patterns of the wild S.prenanti population and contribute to the formulation of resource protection measures.

关 键 词：大渡河中游 齐口裂腹鱼 仔稚鱼 产卵 水文因子 

分 类 号：S932.4[农业科学—渔业资源]