Influence of water quality on fish productivity [electronic resource].
تأثير نوعية المياه على إنتاجية الأسماك.
- p.313-318.
Includes references.
The physical, chemical and hacteriological parameters of water in fish ponds were investigated with a view to optimize the conditions for fish productivity by using three private fish farms with differen! water supplies. Water and fish samples were collected equally from each pond over a period of 17 months. Water temp., Dissolved oxygen (DO), pH, Ammonia, Nitrite, Nitrate, and bacterial count were determined. The average values of bacterial, parasitic, survival and growth rates of fish were also assessed. Results revealed that pond water in farm (11I) had the highest average. of temperature nitrite, nitrate 31.8±1.5, 8.18± 0.9, 0.41 ± 0.06 , 3.79 ±0.6 resp., with the least content of DO 3.6 ± 0.7 followed by farm (II),which bad also the highest mean values of NH3 - N, total coli form and fecal coli forms were 3.15±0.65, 59.0 & 18.5 followed by ponds of farm (III), while, the lowest averages or estimated parameters were recorded in farm (I).
Summary in Arabic.
Fishes--Effect of water quality on Fishes--Reproduction