Wildlife & Fisheries management

Permanent URI for this communityhttps://repository.ui.edu.ng/handle/123456789/492

Browse

Start date: 2010Subject: search.filters.subject.Haematology

Search Results

Now showing 1 - 4 of 4
  • Thumbnail Image
    Item
    Toxicity of calcium hypochlorite on fingerlings of Clarias gariepinus (Burchell, 1822)
    (Faculty of Agriculture and Forestry, University of Ibadan, 2014) Kolawole, A. S; Olukunle, O.
    The toxicity of calcium hypochlorite (containing 65% chlorine disinfectant) was investigated on fingerlings of Clarias gariepinus. Fish of mean weight of 5.5 ± 0.8g and total length of 7.8 ± 0.5cm were exposed to various concentrations (0.00, 0.011, 0.033, 0055 and 0.077 mg/I) of calcium hypochlorite resulting in residual chlorine of(0.00, 0.002, 0.006, 0.010 and 0.014 mg/l respectively) for 12, 24, 48 and 96h, adopting a static bioassay technique. The water quality, tolerance and behavioural responses, haematological and histopathological parameters of fingerlings of Clarias gariepinus were monitored and measured using standard methods. Blood samples were obtained from the caudal circulation and used for the measurement of Packed Cell Volume (PCV), Haemogolobin level (Hb), Red and white Blood cell count. Erratic swimming, excited competitive movements and gasping for air at the surface were the behavioural changes observed with increase in time of exposure and concentration of the chemical. The water quality parameters were measured during and after the experiment. Significant differences were observed. The PCV showed significant (P<0.05) decrease in values between 25% and 20% in all concentrations compared to the control value of 29% at 96h exposure. Haemoglobin levels were similarly significantly (P<0.05) lowered from the control value of 8.3g/dL to 6.7g/dL in the varying concentrations with increase in time of exposure. Deteriorating changes were observed in the liver, gill and brain of fingerlings of C. gariepinus exposed to calcium hypochlorite with increase in both concentration and time of exposure. It is therefore concluded that treated municipal water supply which usually contains residual chlorine of 0.20ppm is not suitable for aquaculture. It is recommended that the water should be exposed to light between 24 to 48 hours in order to allow for the evaporation of the residual chlorine present in it if it must be used at all. Calcium hypochlorite should not be used indiscriminately in aquaculture systems.
  • Thumbnail Image
    Item
    Haematological changes of Clarias gariepinus juveniles fed different dietary lipid
    (Fisheries Society of Nigeria, 2012) Oshoke, J. O.; Olukunle, O. A.; Ajayi, A. I.; Dasuki, Saulawa, L. A. A.
    Twelve weeks feeding trial was conducted to determine the effects of different dietary lipid sources on the hematological changed in Clarias gariepinus juveniles, 6 iso-nitroginous diets were formulated at 45% CP and fed to triplicate groups of 15 juveniles. The feed contained (Palm Seed Oil (PSO), Ugwu Seed (USO), Soya Bean Oil (SBO), Almond Seed Oil (ASO), Mixture Of All the vegetable oil + the fish oil (MOA) and Cod Liver Oil (CLO) which is the control. The oils were added at 5% inclusion level respectively. Fish of mean weight 22.83+ 0.30g were fed these experimental diets in triplicate groups. The hematological analyses of fish showed that the red blood cell, white blood cell, Erythrocyte sedimentation rate (ESR), Mean cell volume (MCV), Mean cell Haemoglobin (MCH) and packed cell volume were not significantly different (p<0.05), but haemoglobin concentration and Mean cell haemologlobin concentration (MCHC) were significantly different (p>0.05). The present study showed that PSO, USO, ASO, SBO and MOA can effectively replace cod liver oil without compromising the health of African catfish, Clarias gariepinus.
  • Thumbnail Image
    Item
    Chemical analysis and nutritional assessment of artocarpus heterophyllus lam. (jack fruit) defatted seeds used as addictive in feed for clarias gariepinus post juveniles
    (2013) Olaifa, F. E.; Ajayi, A. A.; Raji, I. O.
    A 49-day feeding trial was carried out with feeds supplemented with microgram quantities of the defatted seeds of Artocarpus heterophyllus in the diets of Clarias gariepinus at the post juveinile stage. Five diets at 40% crude protein were formulated containing 0, 15, 30, 45 and 60x106 μg DAH seed as additive. Each dietary treatment was replicated three times with 10 fish per replicate. Proximate composition of the defatted seed showed that it was rich in protein, carbohydrate and minerals. Fish on DAH–supplementd diets had better survival rates than the control. Haematology, plasma biochemistry and gross tissue examination were also carried out. No significant differences (p<0.05) were observed between the fish on DAH-containing treatments and the control. There might be need to further process and test defatted A. heterophyllus seeds as either probiotic or prebiotic on young fish for longer periods in order to take advantage of its rich supply of nutrients
  • Thumbnail Image
    Item
    The protective effect of walnut (tetracarpidium conophorum) leaf and onion (allium cepa) bulb residues on the experimental pseudomonas aeruginosa infection in clarias gariepinus juveniles
    (African Union, 2012) Bello, O. S.; Emikpe, B. O.; olaifa, F. E.
    The study assessed the effect of Walnut Leaf (WL) and Onion Bulb (OB) residues on disease resistance of Clarias gariepinus juveniles against infection with the bacteria pathogen Pseudomonas aeruginosa. Clarias gariepinus juveniles were fed with diets containing 0 (control), OB2 (0.5%), OB3 (1.0%), OB4 (1.5%), OB5 (2.0%), WL6 (0.5%), WL7 (1.0%), WL8 (1.5%) and WL9 (2.0%). Biochemical (serum total protein, albumin, globulin, albumin: globulin ratio) and haematological indices of the fish were investigated. Fish were exposed to 0.5ml of 107 Pseudomonas aeruginosa of 24h old culture with the percentage mortality and relative level of protection recorded for 4 weeks post – infection. The results demonstrated that the fish fed with treated diets showed increased in biochemical and haematological indices (P<0.05) compared with the control. The challenge infection showed an improvement from treated groups with percentage mortalities and relative level of protection highest in WL8 (3.33%, 90%) and OB2 (3.33%, 90%) and least (33.33%, 0%) in control respectively. The results suggest that walnut leaf residue at 1.5% inclusion for one month could be a potential, less expensive and promising dietary supplement that would positively affect growth, haematology and make C. gariepinus more resistant to Pseudomonas aeruginosa