Influence of water quality on fish productivity
Journal Title: Journal of Veterinary Medical Research - Year 2010, Vol 20, Issue 1
Abstract
The physical, chemical and bacteriological 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 different 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 (III) had the highest averages 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 had also the highest mean values of NH3 - N, total coliform and fecal coliforms were 3.15±0.65, 59.0 & 18.5 followed by ponds of farm (III), while, the lowest averages of estimated parameters were recorded in farm (I).Correspondingly, fish samples of farm (III) showed the highest level of total bacterial, coliform, fecal coliform count and parasitic infestation; were 42.5±5.4, 29.6±3.6 , 11.3±3.1 and 31.15% respectively, followed by fish of farm(II) 29.75±3.5, 11.5±3.3, 7.4±1.1 and 10.8 % respectively, Meanwhile, fish in farm (I) showed the lowest value of both bacterial contents with no parasitic infestation which explain the highest percentages of daily weight gain & survival rates 35.2±4.4 gm. & 97.0 ±1.6 % respectively. Throughout study period compared with those in farms (III & II) respectively, resulting from poor water quality & parasitic infestation which acts as stressors affecting fish health and productivity. Therefore, fish productivity can be enhanced if the water quality in the ponds were maintained at optimum levels.
Authors and Affiliations
M. A. El Bably1; H. H. Emeash1; Asmaa N. Mohamed1; Nahla R. 2 1Department of Hygiene, Management and Zoonoses, Faculty of Veterinary Medicine, Beni-Suef University 2Department of Fish Diseases, Animal Health Research Institute, Dokki, Giza, Egypt
Rumen impaction in cattle due to plastic materials
The present study was carried out on 22 cows suffering from ruminal impaction with plastic materials as foreign bodies and ten apparently healthy cows as a control group. Clinical examination included clinical signs, tem...
Effect of parity on the peripartum hypocalcaemia In dairy cows under Egyptian conditions
A total of 30 dairy cows were attended in veterinary practice investigations have been done under Egyptian conditions, in Seds farm belong to animal production research institute , from the reproductive perspective . the...
Evaluation of the protective capacity of Toxocara canis embryonated egg antigen in rabbits
Toxocariasis is a disease of unspecific clinical manifestations in human beings and some animals forming a condition known as visceral larva migerans. Effective Toxocara canis (T. canis) control should destroy the dorman...
Characterization of E. coli and Salmonella spp. isolates associated with omphalitis in baby chicks
Omphalitis is a major cause of increased first week-chick mortality. Omphalitis, navel-yolk sac infection, is a hatchery-born disease, and also known as ‘mushy chick disease’ or ‘navel ill’. It is a common disease of chi...
Bovine Ephemeral Fever: Pathological and Immunohistochemical Studies
A natural outbreak of Bovine Ephemeral Fever in Egypt during the summer of 2006 had been observed. In Beni Suef province, out of 70 cattle naturally infected with bovine ephemeral fever virus, three fattening calves suff...