Department of Genetics, Animal Breeding and Ethology, University of Agriculture in Krakow, Krakow, Poland.
Anim Sci J. 2020 Jan-Dec;91(1):e13490. doi: 10.1111/asj.13490.
Research into the chinchilla male fertility concerned mainly semen quality. Little attention has been paid to lifetime reproductive performance, essential from the economical point of view. Thus, the aim of this study was to analyze factors affecting the intensity of breeding use and lifetime performance of male chinchillas. After data transformation, the analysis of variance was performed to evaluate the effect of male birth litter size and age at the first effective mating. Additionally, the correlation coefficients for both litter sizes and litter rearing efficiency were calculated. For all traits, the linear regression on the sire's age at the first effective mating was found non-significant. Litter sizes differed slightly between seasons. The length of sire reproductive use was highly correlated (about 0.8) with the total number of litters and kits born and weaned. The total rearing efficiency was low, and in some cases negatively correlated with other traits, that is, with the total number of litters and kits born and weaned. Most sires were mated up to six dams; they were used in one polygamous set each. In total, the males sired about 60 litters each, hence the conclusion is that they could be extensively used and produce more benefits to chinchilla breeders.
研究表明，人们主要关注雄性龙猫的精液质量，而对其终生繁殖性能的关注较少，而从经济角度来看，后者至关重要。因此，本研究旨在分析影响雄性龙猫繁殖强度和终生性能的因素。在对数据进行转换后，我们采用方差分析评估了雄性龙猫的初生窝仔数和首次有效交配时的年龄对繁殖强度的影响。此外，我们还计算了窝仔数和窝仔育成效率的相关系数。对于所有特征，我们发现，父龙猫首次有效交配时的年龄与总窝仔数和总产仔数呈线性回归，没有显著影响。窝仔数在不同季节略有差异。父龙猫的繁殖使用年限与总窝仔数和总产仔数高度相关（约为 0.8）。总育成效率较低，在某些情况下与其他特征呈负相关，即与总窝仔数和总产仔数呈负相关。大多数公龙猫与六只母龙猫交配；每只公龙猫在一个多配系中使用。总体而言，雄性龙猫每只产仔约 60 窝，因此可以广泛使用，为龙猫饲养者带来更多收益。
