Читать книгу Bovine Reproduction - Группа авторов - Страница 159

Accessory tails are an uncommon occurrence affecting a small number to as much as 35% of a spermiogram. Closely related to the abaxial tail aberration, accessory tails, multiple tails, and abaxial tails are often present in the same spermiogram [2]. Differing from abaxial tails, however, accessory tails have been shown to have a negative effect on fertility. Accessory tails may be partially obscured by droplet material; therefore the proportion of affected sperm may be underestimated. This defect has been recorded in a number of breeds of cattle and is believed to have a heritable basis [27].