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Hafeez-Ur-Rehman M.,University of Veterinary and Animal Sciences | Ashraf M.,University of Veterinary and Animal Sciences | Abbas F.,University of Veterinary and Animal Sciences | Iqbal K.J.,Islamia University of Bahawalpur | And 2 more authors.
Pakistan Journal of Zoology | Year: 2015

Effect of different synthetic hormones and/or their analogues have been evaluated on breeding performance of Channa marulius using four different hormonal treatments. Males were injected with various combinations of ovaprim (gonadotropin releasing and dopamine antagonist) with human menopausal gonadotropin (HMG), human chorionic gonadotropin (HCG) and HCG+HMG; whereas, females received combination of ovaprim with HMG and HCG. After 12, 16, 20 and 24 h of first dose, injection of ovaprim were administered and blood testosterone, follicle stimulating hormone and luteinizing hormone were analyzed every 4 h for 48 h. Results indicated that combination of HCG+HMG and ovaprim+HCG were effective and reliable synthetic hormones for induced spawning in C. marulius. Fecundity and egg fertilization rate was highest for HCG+HMG at latency period of 43.20-44.45 h. Blood hormonal levels were non-significant (P<0.05) and increased gradually till 28 h of post injection and then decreased gradually. Fish injected with ovaprim+HCG does not spawn at all. Eggs obtained were yellow, spherical, non-adhesive and translucent. After fertilization, first cleavage was observed within 2 h, second was between 3-4 h and after 4-6 h, a shield appeared inside and two-layered structure appeared with an outer epiblast and inner hypoblast. However, no further development was observed as the eggs succumb to fungal infection. Copyright 2015 Zoological Society of Pakistan. Source

Mirza Z.S.,Fisheries Research and Training Institute | Nadeem M.S.,Pmas Arid Agriculture University | Beg M.A.,Pmas Arid Agriculture University | Malik I.-U.,Pmas Arid Agriculture University
Pakistan Journal of Zoology | Year: 2013

Mangla dam consists of five distinct basins receiving water from two perennial and two nonperennial rivers. Studies were carried out to find spatial and temporal variation in physicochemical characteristics of the surface water in five basins of the dam from January 2009 to December 2010. The result showed that the mean values of temperature, Secchi Depth, pH, Dissolved Oxygen and Conductivity were 22.8°C, 14.5 cm, 7.81, 7.9 mg/L and 441.7/μS/cm. The mean values for total alkalinity, total hardness and total dissolved solids remained 120.0 mg/L, 195.9 mg/L, and 314.0 mg/L respectively. Mean values for nitrates (2.44 mg/L) resulted in higher phytoplankton count (92/ml) in the dam. In general, the water quality followed a cyclical pattern with summers favoring higher primary productivity. Except for pH and dissolved oxygen, almost all the water quality parameters varied significantly (P Source

Hafeez-Ur-Rehman M.,University of Veterinary and Animal Sciences | Ashraf M.,University of Veterinary and Animal Sciences | Abbas F.,University of Veterinary and Animal Sciences | Qureshi I.A.,Fisheries Research and Training Institute | And 3 more authors.
Journal of Animal and Plant Sciences | Year: 2015

The study was conducted to determine the efficacy of various doses of Ovaprim on reproductive behavior of Channa marulius. Fish was fed on 40% protein containing diet at 5% of its body weight for 4 months. On maturity, males weighed were 1100-1340 g and females 1150-1350 g. Two males and two females were randomly paired (8 pairs in total), the 4 groups which emerged were names as control, treatment 1, 2 and 3 (each in 2 replicate tanks). Each male and female received Ovaprim intramuscularly in two installments with an interval of 24 hours. The blood samples were drawn from each sex with an interval of 2 hour for estimation of testosterone, FSH and LH levels. None of the fish spawned even after 48 hours of hormone administration. Ovaries were removed from each fish, weighed and eggs were counted. Fecundity (No.of eggs) was 870.0 ±75.27, 811.2 ±103.30, 900.0 ±95.56 and 940.0 ±39.79 in Control, T1, T2, and T3 respectively. Mean ova diameter ranged from 1.48±0.02 to 1.54±0.01mm. The lowest mean ova diameter (1.48±0.02 mm) was observed in control tank (0.4 ml Ovaprim/kg b.w) while the highest (1.54±0.01 mm) was in T1 (0.5ml Ovaprim/kg b.w.). The highest testosterone level (2.05±0.11 ng ml-1) was observed in T3 after 20 hours of first injection of Ovaprim while the highest FSH level (0.88±0.02 ng ml-1) was observed in the same treatement after the 28 hours of hormone injection. These studies discovered that Ovaprim dosages are inadequate for stimulation of breeding. © 2015, Pakistan Agricultural Scientists Forum. All rights reserved. Source

Mirza Z.S.,Fisheries Research and Training Institute | Nadeem M.S.,Fisheries Research and Training Institute | Beg M.A.,Pmas Arid Agriculture University | Qayyum M.,Pmas Arid Agriculture University
Journal of Animal and Plant Sciences | Year: 2012

Present study was aimed to investigate the age structure, growth parameters, natural and fishing mortality coefficients of the common carp (Cyprinus carpio) in Mangla reservoir, Pakistan. To assess the parameters and infer on the degree of exploitation, the fork length frequency data were analyzed using the FISAT (ELEFAN I) computer program. The parameters of the von Bertalanffy growth curve for length were L∞ = 80.33 cm, K= 0.60 yr-1, to= -0.39 year and longevity potential =5.0 years. The instantaneous coefficient of mortality of the population were estimated to be, total mortality (Z)=1.22 years, natural mortality (M) = 0.89 and fishing mortality (F) = 0.33. The stock showed a growth performance (ø) value of 3.588. The current exploitation rate of the species was calculated as 0.27. The analysis of relative yield per recruitment, and relative biomass per recruitment showed that the maximum allowable exploitation rate at Maximum Sustainable Yield (MSY) for the common carp fishery in Mangla reservoir is 0.63 which is more than the currently observed exploitation rate. The results suggest that common carp stock in the reservoir is not overfished and is within safe exploitation limits. It is recommended that regular monitoring program for the stock should be in place and any proposal for a change in exploitation rate should be assessed according to the stock status at that point of time. Source

Shaheen T.,Fisheries Research and Training Institute | Akhtar T.,University of Punjab
Turkish Journal of Zoology | Year: 2012

Static renewal exposure of various sublethal concentrations of hexavalent chromium [Cr(VI)] produced a deleterious effect on some hematological and biochemical parameters of Cyprinus carpio with the increase in concentration of metal. C. carpio breeders (W = 500 ± 9.5 g; L = 25.60 ± 2.6 cm) were randomly divided into the control group (n = 33) and treated group (n = 198), with 11 breeders/tank (8.84 m3). The groups were distributed into tanks containing 1 of 7 sublethal concentrations of Cr(VI) (0, 25, 50, 75, 100, 125, and 150 mg/L), with 3 replicates per concentration for 6 months. Monthly Cr(VI) levels in the water were determined with an atomic absorption spectrophotometer. The Cr(VI) induced a significant increase (P < 0.05) in white blood cells, mean corpuscular volume, erythrocyte sedimentation rate, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, and acid phosphatase, indicating anemia. However, red blood cells, hemoglobin, packed cell volume, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, glucose, protein, and cholesterol decreased significantly (P < 0.05) with the increase in Cr(VI) concentrations from 25 to 150 mg/L. The actual Cr(VI) concentration varied from 36 to 118 mg/L in the tanks exposed to concentrations from 25 to 150 mg/L. The increasing trend was probably due to the toxic effects of the Cr(VI) and activation of the fish immune system to resist against metallic stress and liver damage. The decreasing trend reflected retarded and deteriorated fish health along with severe hemolysis. © TÜBİTAK. Source

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