The micropyle number in the ova of sturgeon species from the South Caspian Sea was investigated. The study was conducted on female broodfishes of three species of sturgeon (Persian sturgeon , Stellate sturgeon and great sturgeon) inluded 44 Persian sturgeon , 13 Stellate sturgeon and 8 great sturgeon specimens. Fifty eggs were randomly collected from each broodfish and the micropyle number of totaly 3250 eggs was determined. Out of 44 Persian sturgeon used, 14 specimens were collected from the south-east Caspian region (Golstan Province, Shahid Marjani Center) and 30 were from the south-west Caspian region (Guilan Province, Shahid Dr. Beheshti Center). The Stellate sturgeon specimens were taken from the south-west and great sturgeon specimens were from the south-east Caspian region. The obtained result showed that the mean micropyle number in Persian sturgeon caught from the south-east Caspian region was 8, whereas in those caught from the south-west region was 9. There was no significant difference (p>0.95) in the micropyle number of Persian sturgeon collected from the south-east and south-west regions. the mean micropyle number determined for Stellate and great sturgeon was 5. The outer diameter of the micropyle in the Persian, Stellate and great sturgeon were 23 um, 21 um and 22 um and the inner diameters were 19um, 17um and 19um respectively.
کلید واژگان :Micropyle, Oocyte, Sturgeon, South Caspian Sea
ارزش ریالی : 600000 ریال
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