Effects Of Probiotic, Lactobacillus Acidophilus On Pathogenic Bacteria, Growth, Hematological Parameters And Histopathology Of African Catfish (Clarias Gariepinus)

Four experiments were carried out to evaluate the in vitro and in vivo used of Lactobacillus acidophilus as a biocontrol agent against some common fish pathogenic bacteria (Staphylococcus xylosus, Aeromonas hydrophila gr.2 and Streptococcus agalactiae) and its effects on growth performance, hematological parameters, and histopathology of African catfish, Clarias gariepinus. In the first experiment, the antimicrobial activity of L. acidophilus against common fish pathogenic bacteria was studied in vitro. In the second experiment, 2 experimental diets were formulated comprising of a control (non-probiotic diet) and a L. acidophilus supplemented at a concentration of 3.01 x107 colonies per gram of diet (probiotic diet)

Reproductive Biology of Arabian Pandora, Pagellus Affinis (Boulenger, 1888) from Hadhramout Coast, Gulf of Aden

Two hundreds and fifty eight fish of P. affinis samples were randomly collected from Hadhramout coast, Gulf of Aden during period of March 2012 until April 2013. Generally, the best growth performance of P. affinis was occurred from May to September related to available nourishment, upwelled bottom nutrient. Length-weight relationship was 2.83 appeared the isometric growth during whole year. Sex ratio was revealed 1:1, males to females in whole year. The gonado somatic index values were above 3%, showing that spawning could be placed in June to September in a year at length 20.2 cm to 22.8 cm, with a peak of activity spawning in September. The highest percentage of absolute fecundity was 35% in June followed by 25% in both August and July, whereas the lowest percentage was 15% in September. Also, the condition factor gives the impression the sexual maturity from July to November at 19 cm to at 21.1 cm in length

Effects of Probiotics Supplementation with Lactobacillus SP. Bacteria on Growth and Survival Rate of Cultured Mullet Fish (Mugil sp.) in Floating Cages

This study was conducted to determine the effect of probiotics, Lactobacillus acidophilus on the growth parameters of Mugil sp. fish, their approximate biochemical composition and the environmental conditions of their culture for 12 weeks in floating cages. Six hundreds of fish were randomly distributed in two groups of 100 fish in each floating cages (length of 1 m, width of 1 m, depth of 2 m) with an initial weight of 39.5± 0.2 g. The first group was fed with the control diet and the second group with probiotics diet. The results showed significant differences (P \u3c0.05) between fish fed on probiotics diet and fish fed on control diet in weight gain (WG), relative growth rate (RGR) and food conversion rate (FCR). The weight gain in the probiotics group was 18.3 g, while in the control group was 12.2 g. There was no significant difference (P\u3e 0.05) for the specific growth rate (SGR). The survival rate (SR%) was achieved at 100% in both groups. Also, there was a significant difference for the approximate composition of fish protein, fat and ash between the probiotics group and control group. From these results, it can be concluded that the probiotics group of Mugil sp. was better with 15.7% than the control group regarding to growth. Also, WG, RGR and FCR were better in the probiotics group than control group. The environmental indicators revealed that culture waters exposed to organic pollutants have led to a decline in the ratio of the concentration of dissolved oxygen, affecting the growth of fish negatively