Reproductive success of farmed blue foxes

Area of Science:

• Animal Science
• Reproductive Biology
• Veterinary Medicine

Background:

• Understanding reproductive performance is crucial for efficient farm management of blue foxes (Vulpes lagopus).
• Perinatal mortality rates and factors influencing cub survival require detailed investigation in farmed populations.

Purpose of the Study:

• To establish baseline data on reproductive performance components in farmed blue foxes.
• To evaluate the effects of female age, yearly variations, and parental contributions on reproductive success.

Main Methods:

• Natural mating of blue foxes under farm conditions.
• Systematic recording of perinatal cub mortality.
• Analysis of reproductive data across four study years, considering female age and litter characteristics.

Main Results:

• Over 2047 females produced 22,941 cubs, with 5.9% stillborn and 11.4% dying before weaning.
• Abnormal births and partial litter abortions were the main causes of reproductive failure; infanticide was minimal (0.3%).
• Primiparous vixens had smaller litters and higher cub losses compared to multiparous vixens; father's age had minimal impact.

Conclusions:

• Reproductive success in blue foxes is primarily influenced by factors leading to abnormal births and abortions.
• Management strategies should focus on improving conditions for primiparous vixens to enhance litter size and cub survival.
• The study provides essential data for optimizing blue fox breeding programs and improving overall farm productivity.