Comparison Reproductive and Biometric Indices in Russian sturgeon Acipenser gueldenstaedti in Iran and Russia
Subject Areas : New Technologies in Aquaculture Development
Keywords: Russia, Caspian Sea, Keywords: Iran, Biometry, Artificial propagation, Russian Sturgeon (Acipenser gueldenstaedti),
Abstract :
Abstract[1] Understanding biometric and reproductive indices in sturgeon broodstocks can improve and help to artificial propagation quality. This study was conducted to aim of determination of biometric and reproductive indices in Russian sturgeon (Acipenser gueldenstaedti) in Iran climate condition and was compared to broodstock condition in sturgeon hatcheries in Russia. 27 female and 13 male broodstocks were considered in Shahid Marjani hatchery centre. After maintaining the broodstocks at Kuranski ponds and measuring the germinal vesicle position, 12 female was eliminated from artificial propagation and the others was injected by pituitary hormone. After maturity duration, 10 females and 5 males showed positive response to the hormone injection. For comparing the obtained results to sturgeon artificial propagation and rearing activities, the data was compared to hatcheries normatives in Russia. Results showed that some of parameters including weight, age, fecundity and percent of egg donating broodstocks in Iran are less than to Russian hatcheries, it seems that the broodstocks are not in high maturating level and they are before maturity stage, but oocyte size and ovary weight were at the same mean size and weight in Volga broodstocks. Therefore, it seems that there is no suitable conditions to Russian sturgeon migrating in south of the Caspian Sea, so there are not suitable broodstocks according to physiological and reproductive parameters in hatcheries, and after propagating this kind of broodstocks, there will be some problems in artificial propagation like low inducing the broodstocks, percent of fertility, survival at incubation period and so on. *Corresponding author; falahatkar@guilan.ac.ir
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