Survey on feeding with soy (Glycine max) and garlic (Allium sativum) phytoestrogens on histological structure of ovary in Yellowfin seabream (Acanthopagrus latus)

The present study has performed to investigate the effects of different levels of soy and garlic phytoestrogens on ovarian structure in Yellowfin seabream  (Acanthopagrus latus). A total of 105 Yellowfin seabream were divided in seven groups including a control group that were received standard food without any extract and six treatment groups that were received different doses of soy (2/5, 5 and 7/5%) and garlic (0/5, 1 and 2%) hydroalcoholic extract. Fish were fed daily at a rate of 3% of body weight twice for 14 days. Sampling was done in days of 0, 7, 10 and 14. In every time, a section of mid portion of gonad was cut for histological examination. The results showed that different doses of soy and garlic phytoestrogens have various effects on growth and development of gonad in Yellowfin seabream as a protandrous hermaphrodite fish, so that increase in dose and time of consumption of food containing garlic hydroalchoholic extract cause increase in number of vitellogenesis follicles and finally growth and development of ovary, while consumption of food containing soy hydroalcoholic extract cause observing of testis and immature ovaries containing previtellogenesis follicle and prevents gonad development from testis to ovary in protandrous hermaphrodite fish.