Structural changes of gonadotropic lobe in relation with gonads development of silver carp (Hypophthalmichthys molitrix) during maturation and ovulatio
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2011, Vol 4, Issue 2
Abstract
The paper has followed the evolution of gonatotropic lobe structure in relation with gonads development of silver carp, Hypophthalmichthys molitrix (Valenciennes, 1844), female breeders taken from the Great Basin Pond 1 – Vaslui county, Carja Fish Farm. Ten specimens were analyzed after completion of vitelogenesis process, in the both maturation period (April-May) and ovulation period (June). On the histological sections of the ovary, during oocyte’s maturation, secondary oocytes (stage VIIA), passing towards stage VIIBof maturation scale were distinguished as dominants while primary oocytes of young stages (III and IVA) were rare. During ovulation a large number of mature oocytes (stage VIIC) are present.The pituitary histological sections showed an increasing number and size of the cells during maturation process while a progressive degranulation and vacuolation is observed in most gonadotropic cells during spawning.
Authors and Affiliations
Adina Popescu, Maria Fetecău, Lorena Dediu, Victor Cristea
Keywords
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