【摘要】 在黑龙江流域呼玛河、额木尔河采集黑龙江茴鱼332尾，经鉴定，雄鱼180尾，雌鱼133尾，雌雄不辨19尾。对63尾性腺发育达到Ⅳ期的雌鱼测量体长、体质量、净体质量、卵巢质量、年龄，计算性腺成熟系数、肥满度等；取其卵巢前、中、后约0.25 g性腺组织称重、计数，计算个体繁殖力；运用SPSS 16.0将雌鱼个体绝对繁殖力（F）、体长相对繁殖力（F_L）、体质量相对繁殖力（F_m）与生物学指标进行多元线性回归分析，获得全回归方程，从中筛选出P值小于0.05的指标，再次进行多元线性回归分析，最终建立标准化回归方程；将个体繁殖力与7项生物学指标分别进行拟合，从中筛选出拟合度最高的方程。结果表明：黑龙江茴鱼繁殖群体由2～4龄个体组成，个体绝对繁殖力为（2 152.63±905.96）粒；体长相对繁殖力为（11.11±3.01）粒/mm；体质量相对繁殖力为（22.99±1.62）粒/g；多元回归分析表明，个体绝对繁殖力与卵巢质量呈正相关，且偏相关系数最高；从最佳拟合方程中可以看出，个体绝对繁殖力与卵巢质量（m₀）的拟合度最高（R²=0.984 3），关系式为F=0.812 6m₀²+234.09m₀+520.14，可以用个体绝对繁殖力和卵巢质量的最佳拟合方程估算野生黑龙江茴鱼种群的繁殖力。更多还原

【Abstract】 A total of 332 Thymallus grubii were collected from the Huma River and the Emur River in the Heilongjiang River Basin.And 180 males,133 females,and 19 unable to distinguish between male and female were identified.Body length,body weight,net body weight,ovarian weight,age,gonadal maturity coefficient and fullness were measured in 63females whose gonadal development reached stage Ⅳ.The age of micro-otoliths was identified,and about 0.25 g of gonadal tissue in the anterior,middle and posterior ovaries of the females was weighed respectively and counted,and the individual fecundity was calculated.SPSS 16.0 was used to conduct multiple linear regression analysis on absolute fecundity F,the relative fecundity of body length F_L,the relative fecundity F_m of body weight,and the biological indexes of female individuals,and the full regression equation was obtained,from which the index with P value less than 0.05was screened out,and the multiple linear regression analysis was carried out again,and finally the standardized regression equation was established.Individual fecundity was fitted to seven biological indicators,and the equation with the highest fit was selected.The results showed that the breeding population of Thymallus grubii was composed of 2-4years old individuals,and the absolute fecundity of individuals was （2 152.63±905.96） grains.The relative fecundity of body length was（11.11±3.01） grains/mm.The relative fecundity of body weight was （22.99±1.62） grains/g.Multiple regression analysis showed that the absolute fecundity of individuals was positively correlated with ovarian quality,and the partial correlation coefficient was the highest.From the best-fitting equation,it can be seen that the fitting degree between individual absolute fecundity and ovarian mass is the highest （R²=0.984 3）,and the relationship is F=0.812 6 m₀²+234.09 m₀+520.14,so the best-fitting equation of individual absolute fecundity and ovarian mass can be used to estimate the fecundity of wild Thymallus grubii population.更多还原