神农架多鳞铲颌鱼繁殖生物学研究

摘要

研究了神农架多鳞铲颌鱼的繁殖生物学。生殖季节可凭“珠星”等副性征辨别雌雄，首次性成熟年龄雌鱼为3龄、雄鱼为2龄；雌雄性比为1．08∶1。繁殖期为每年的4月底至6月中旬，属多次性产卵类型。个体绝对繁殖力为1527～15875粒，平均为（5568±3172）粒；个体相对繁殖力为11～41粒／g ，平均值为（27．14±7．46）粒／g。%The reproductive biology of Varicorhinus macrolepis was studied in Shennongjia .During the re‐productive season ,sex is distinguished by “pearl” and other secondary sex characteristics ,and the first sexual maturity appeared at age 3 for female and age 2 for male with sex ratio of female/male = 1 .08∶1 . The breeding period was from the end of April to the middle of June ,and the species was found to be a multiple spawner .The individual absolute fecundity was ranged from 1527 eggs to 15 875 eggs ,with the average 5568 ± 3172 (SD);the individual relative fecundity was between 11-41 eggs/g ,with the average 27 .14 ± 7 .46 eggs (SD)/g .