母兔年龄及年产窝数对繁殖性能的影响

Effect of primipara rabbit aged does and annual litters on the reproduition of zabbits

对172只Vc－1系獭兔初产母免和2O只老龄母兔（45周龄以上）的繁殖性能进行测定，结果表明：初产母兔平均产仔数、初生个体重、断乳成活率分别为6．67，47．57，94．80，稍低于经产母兔（7．10，49．79，93．12）。44～57周龄母兔窝产仔数、初生个体重、断乳成活率和受胎率分别为6．42，50．90，96．3O，87．50，57周龄以上母兔分别为6．35，48．79，92．50，56．67。对年产窝数测定表明，母兔年产2窝、4窝、6窝的窝产仔数、初生个体重、断乳成活率、受胎率分别为7．30，50．22，94．70，96．25；7．23，51．72，94．50，100和6．53，48．04，92．60，81．66。

The reproduction of 72 primipara rabbits and 20aged cloes (over 45 weeks) hasbeen investigated. The result showd the number born alive, birth weight and weaning livabilvty of Primipararabbit was 6. 67, 47. 57, 94. 80 respectively, a little lower than that ofmultiparous rabbits, which was 7. 10, 49. 79, 93. 12; The number born alive, birth weight,weaning livability and conception rate of 44 - 56 weeks close was 6. 42, 50. 90g, 96. 30% and87. 50%, while that of over 57 weeks is 6. 35、48. 79g 、and 56. 67 respectively. As the result ofthe study on annual litters, the number born alive, birth weight, weaning libability andconception rate were 7. 30, 50. 22g, 94. 70%, 96. 25%; 7. 23, 51. 72g, 94. 50%, 100% and6. 53, 48. 04% g, 92. 60%, 81. 6%, as it is 2, 4, grespectively.