عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Nowadays, methods are used to assure that fish will be alive after obtaining eggs in sturgeon
brood stocks. This study examines the extraction of eggs from Sterlet (Acipenser ruthenus)
females and their survival after the extraction which was made through a small surgery. In this
study, after sexing and maturity staging, 3 of 16 fish which were in maturity stage IV and were
injected with pituitary extract after sexing and maturity staging and after ovulation. Ripe oocytes
were collected through a 2.5 cm abdominal incision. Then, the wounds were closed with two
simple sutures and disinfected. Individual reproduction indices on each fish were recorded.
Results of this study showed that most of the ripe oocytes were collected easily and in a short time
by using this method, and no mortality occurred from surgical manipulation or secondary
infections. After 30 days, wounds had thoroughly improved. This study shows that using surgery
in small-sized Sturgeon, less than one kilogram, is easy and possible. To protect the brood fish in
culture conditions, this method would be advisable.