Stages of oocyte maturation in sea bass (Dicentrarchus labrax) gonads after LHRHa hormonal treatment were investigated. LHRHa was injected into sea bass broodstock with an oocyte diameter of 527-580 µm. A second injection was given 12 h after the first injection. For each injection a dose of 10 µg/kg was used. At 24 h, oil globules in oocytes were randomly distributed. These oil globules started to fuse and change to a spherical shape from an ellipsoidal shape at 36 and 42 h. Ovulation was observed between 45 and 54 h after the first intramuscular injection. After 54 h from the first injection, oocytes became overripe due to no spawning occurring on time. The overripe rate in gonads was 90% at 60 h.
Oocyte, hormone, LHRHa, European sea bass
FIRAT, KÜRŞAT; SAKA, ŞAHİN; and SÜZER, CÜNEYT (2005) "Gonadal Oocyte Development in LHRHa Hormone Treated European Sea Bass (Dicentrarchus labrax L., 1758) Broodstock," Turkish Journal of Veterinary & Animal Sciences: Vol. 29: No. 1, Article 14. Available at: https://journals.tubitak.gov.tr/veterinary/vol29/iss1/14