短毛黑色水貂与山东黑褐色标准水貂繁殖性能比较OA

This study aimed to compare the reproductive performance of American Blackglam mink with that of Shandong Black Standard mink,and to provide theoretical support for the establishment of evaluation standards for the reproductive performance of both breeds.The results were as follows:there were no significant differences(P>0.05)in the utilization rate,mating frequency,and mating ratio of male minks between the two breeds,with American Blackglam minks at 90.77%,11±1 times,and a ratio of 1∶4.1,and Shandong Black Standard minks at 90.00%,10±1 times,and a ratio of 1∶4.2;the gestation period rate of female American Blackglam mink were significantly lower than that of Shandong Black Standard mink(P<0.01),and the litter survival rate was significantly higher than that of Shandong Black Standard mink(P<0.01).The initial litter weight,offspring birth weight,total number of offspring per litter,and survival rate of juvenile minks during the time of skinning were all significantly lower(P<0.05)than those of Shandong Black Standard minks.Other reproductive performance indicators such as the mating rate,litter size,and number of live offspring per litter showed no significant differences(P>0.05)between the two breeds.It was concluded that American Blackglam minks outperformed Shandong Black Standard minks in terms of gestation period and litter survival rate of females,but underperformed in terms of litter weight,offspring birth weight,total number of offspring per litter,and survival rate of juvenile minks during the time of skinning.The research results provided theoretical support for the establishment of breeding performance evaluation criteria for the two varieties of mink.