MORPHOLOGICAL AND HISTOLOGICAL STUDIES ON HYBRID SOLE FISH (SOLEA VULGARIS AND SOLEA AEGYPTIACA)

MORPHOLOGICAL AND HISTOLOGICAL STUDIES ON HYBRID SOLE FISH (SOLEA VULGARIS AND SOLEA AEGYPTIACA)

Mohamed Wafeek²; Safaa Sharaf¹; Safaa S. Abdelkawy³

Abd Elazem M. Abd Elazem² and Elsayd I. Attia³

¹Department of animal production and fish resources faculty of Agriculture, Suez Canal University.

²Department of fish physiology and spawning, central laboratory for Aquaculture Research Abbaasa.

³National institute of Oceanography and Fisheries, Shakshok El-Fayom branch.

ABSTRACT

Sole species are important in the Egyptian waters so that fishes used in this study were collected (Solea aegyptiaca from Qarun Lack
and Solea vulgaris from Bardawil Lack, Egypt. The experimental fish were transported to Shakshouk, Fayoum governorate, National Institute of Oceanography and fisheries the experiment was stocked in fiberglass tanks. The hybridization occurs bet wean females Solea aegyptiaca with male of Solea vulgaris (G1) and females Solea vulgaris with male Solea aegyptiaca (G2). Total number of fish 54 females and males from Qarun and Bardawil Lack by sex ratio 2 females: 1 male for each tank with three replicates for each treatment. These groups were injected with pituitary gland extract 4 mg/kg of body weight for two groups. The results showed comparison the two groups of length, weight brood stock, Condition factor, relative fecundity, egg diameter, fertilization rate, gonad somatic index, hatchability rate and absolute fecundity. The following measured were determined, total length, head length, trunk length, tail length and mouth opening larvae even 30 day after hatching. This study demonstrates that G2 was the best group whereas G1 was the lowest group on all performances.

Key word: Eggs, larvae, Yolk, Sole, Solea aegyptiaca, Solea vulgaris and hatching.