Journal of Aquaculture Research & Development

Relationship between eggs ageing and carpiculture (Deroua fish farm, Morocco)

5^th Euro Global Summit on Aquaculture & Fisheries

March 30-31, 2017 Madrid, Spain

F Z Majdoubi, A Ouizgane, M Droussi and M Hasnaoui

University of Sultan Moulay Slimane, Morocco
Deroua fish farm, Morocco

Posters & Accepted Abstracts: J Aquac Res Development

Abstract:

The aim of this study is to evaluate the effect of prolonged retention on ovulated eggs in the female�??s body cavity on the reproductive performances, especially fertilization and embryonic survival. For that purpose, the experiment was performed using oocytes originating from 9 females (weight variation from 2.5 to 5.3 kg) sampled at ovulation as well as 30, 60 and 90 minutes later. Oocytes were immediately fertilized and hatched at 24°C. The observation of the eggs development showed that eggs viability ratios (fertilization and embryonic survival) evaluate negatively during the post-ovulation. Freshly-ovulated eggs showed 62% fertilization and 62% for embryonic survival, but ovulated eggs retained in the ovary lumen for 90 minutes before stripping gave 30% fertilization and 30% for embryonic survival. The experiment showed that the duration oocytes can be retained in the ovarian lumen without affecting their viability is short so that it makes the manual stripping a critical step on hatchery management.

Biography :

Email: f.zmajdoubi@gmail.com