Study On Seminal Quality Of Fox

The study on sperm biology of Finnish giant blue fox, general bule fox and hybird Fl (Finnish giant blue fox X general blue fox ) was conducted during 1998-1999.The study results were as follows) :1. Semen sample were collected by digital manupulation. The ejaculate volume and sperm density were 6.69 + 0.8ml and 1412.05 + 1157.7.2x 106/ml for Finnish giant blue fox respectively; 0.71 +0.37ml and 1042.73 +849.2 X 106ml for hybrid F 1 ; 0.51 +0.35ml and 537.11 +349.7X 106/ml for general blue fox; 0.48 + 0.24ml and 492.34+421.12X 106/ml for silver fox. The average ejaculate volume and sperm density of Finnish giant blue fox and hybrid F 1 was higher than general blue fox and silver fox.2. The sperm length of Finnish giant blue fox, hybrid Fl, general blue fox and silver fox was 66.23+1.21 um, 65.30+1.42 u m, 65.34 + 1.35 u m and 67.31 +2.79 u m respectively. The head length of sperm was 6.75 + 0.17 u m for giant blue fox, 6.78 + 0.22 u m for hybrid Fl, 6.64 + 0.22 um for general blue fox and 6.24 + 0.23 um for silver fox. The midpiece length of sperm tail was 12.33 + 0.35 u m for Finnish giant blue fox, 12.29 + 0.3211 m for hybrid Fl, 12.56 + 0.68urn for general blue fox and 12.84 + 0.74 u m for silver fox. The principle piece length of sperm tail was 43.13 + 0.72 u m for Finnish blue fox, 42.76 + 2 u m for hybrid Fl, 42.37 + 0.63 u m for general blue fox and 43.84+1.61 u m for silver fox. There was no significant difference in sperm length between Finnish giant blue fox, hybrid Fl, general blue fox and silver fox.3. Nine type of sperm tail swelling were obseved in hypoosmotic swelling test, among them two type belonged to whole tail swelling, The percentage of sperm tail swelling and whole tail swelling showed a significant positive correlation to sperm motility.4. Results showed that utilization ration of artificial insemination of import fmland fox was 83.4%. Mean survival time of A, B, C groups were 20.6h, 21.7hand5h, respectively. Mean survival index of sperm in A, B, C groups were 16.6, 10.8, 0.8, respectively.