CRUSpace
Welcome to CRUSpace, The Institutional Repository of Crawford University. A collection of theses, articles,books, videos, images, lectures, papers, data sets, and all types of digital content originating from Crawford University, Nigeria. This repository is managed by the University Library
Communities in DSpace
Select a community to browse its collections.
- CBSS
- College of Natural and Applied Sciences (CONAS)
- Crawford University Special Lectures
- University Library
Recent Submissions
Influence of Temperature and Ph on Critical Water Quality Parameters of Laboratory-Reared Culture Media of the Economically Important Heteroclarias Fish Fingerlings
(NSUK Journal of Science & Technology, 2016) Kolo Reuben Jiya; Ayanwale A. V.; Tsadu S. M.; Lamai S. L.; Patrick O. S.; Abdulhakeem A.
The attainment of species-specific conducive water quality environment is crucial to optimum production of fishes in captivity. This need therefore, informed the study of relationships between temperature, pH, and physicochemical parameters of Heteroclarias fingerlings under laboratory conditions. The fingerlings were raised at water temperature regime (Ambient (26.91oC), 28.00, 30.00 and 32.00oC); and pH of 5.00, 7.00 (i.e. ambient), 9.00 and 11.00. The water quality parameters (Dissolved Oxygen (DO); Biochemical Oxygen Demand (BOD); Ammonia; and Conductivity), of fish culture media were monitored weekly for three months. The results indicated that water temperature had no significant (P>0.05) effect on Ammonia concentration (range = 0.15 – 0.17mg/l) and pH condition (range = 6.78 at 26.91oC, to 6.95 at 28.00oC) of the culture media. Water temperature significantly (P<0.05) reduced DO from 6.16±0.91mg/l at 26.91oC, to < 5.00mg/l at temperatures above 28.00oC; but no significant difference in BOD at all temperatures levels. Conductivity increased significantly with rising temperature above the ambient condition (range = 251.02±59.73μS/cm at 26.91oC to 352.89±79.09μS/cm at 28.00oC). pH had no significant effects on the parameters at pH conditions tested; temperature, DO, BOD, and Ammonia. With the exception of significant difference in conductivity (P<0.05) of rearing media of Heteroclarias (range = 304.42±47.20μS/cm at pH 7.00, to 380.94±38.40 μS/cm at pH 9.00). pH 11.00 could not support survival of the fingerlings. The findings of this study have provided useful information for effective water quality management in artificial culturing of the fish Heteroclarias.
Haematological effect of acute concentration of cypermethrin on juveniles of clarias gariepinus
(International Journal of Engineering Science Invention, 2013) Kolo Reuben Jiya; Ojutiku R. O.; Asuwaju F. P.; Obande R. A.; Agbelege O. O.
The experiment was conducted to evaluate the acute toxic of cypermethrin, a synthetic pyrethroids on juveniles of Clarias gariepinus. The effect was assessed based on the comparism results of haematology, examinations of control and experimental group exposed to five nominal concentration of cypavest, 10EC Pesticide Preparation (active substance 100mg/l) of cypermethrin in a static non- renewal bioassay for 96hours. Examination of haematology significantly showed higher value (P < 0.001; 0.01) of white blood cell (WBC), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), packed cell volume (PCV), monophilis and heterophilis; a significant reduction (P < 0.001, 0.01) in Red Blood Cell (RBC) and Lymphocyte was obtained as compared to the control.cypermethrin is therefore toxic to juveniles of Clarias gariepinus.
Feeding Habits and Food Preferences of Auchenoglanis Occidentalalis from Tagwai Lake, Minna, Nigeria
(International Journal of Applied Biological Research, 2019) Kolo Reuben Jiya; Ojutiku R. O.; Tsadu S. M.; Chukwuemeka V. I.
The temporal variation in the food, feeding habits and food preference of Auchenoglanis occidentalis from Tagwai Lake, Minna, Nigeria were investigated from January 2013 to December 2014 using the frequency of occurrence method. In 2013, seven different food items were found in the diet namely; insect parts, plant materials, parts fish parts, protozoans, phytoplankton, sand particles and crustaceans. The same trend was observed in 2014. Insect materials were fed upon the most irrespective of year and season of sampling. When a comparison was done for both years using a T-test, the result revealed that insect parts valued about 24.00±2.00 in 2013 which was the highest value recorded while parts of fish had the highest frequency of occurrence in 2014 (22.50±3.50). The frequency of occurrence of protozoan for 2013 was 8.00±2.00 while that of 2014 was 11.00±2.00. From both years it is seen that although Auchenoglanis occidentalis from Tagwai Lake Minna is an omnivore, which fed on both plant and animal materials, it had tendency to feed more on animal materials.
Composition and Dynamics of Some Nutrient and Physic-Chemical Parameter in Lower Course of Gwagwalada River in Federal Capital Territory, Abuja, Nigeria
(American Journal of Experimental Agriculture, 2014) Kolo Reuben Jiya; Ojutiku R. O.; Mbanaso C. A.
Aims: Jabi dam, Lower Usuma dam and Gwagwalada river in the Federal Capital Territory were studied for a period of twelve months (January 2007–December 2007) to determine their nutrient composition and dynamics.
Methodology: Samples were collected from these water bodies on monthly basis. The concentration of some nutrient parameters such as Phosphate-phosphorus (PO4-P), Nitrate-Nitrogen (NO4-N), Total Dissolved Solids (TDS), Calcium (Ca), Potassium (K) and Sodium (Na) were assessed. The results obtained were statistically analysed to show any relationship amongst them.
Results: The mean values for NO4-N, Ca and K were not significantly different (P>0.05) between the three water bodies. While the mean value for PO4-P were significantly different (P<0.05), with Jabi dam having the highest mean value of 11.61mg/l, followed by Gwagwalada river, 9.96mg/l and Lower Usuma dam had least mean value of 2.46mg/l. Jabi dam, Lower Usuma dam and Gwagwalada river had mean TDS of 95.0mg/l, 88.5mg/l and 104.5mg/l respectively, Gwagwalada river being significantly different (P<0.05) from Jabi and Lower Usuma dams. Similarly, Jabi dam, Lower Usuma dam andGwagwalada river had mean Sodium values of 2.42mg/l, 2.85mg/l and 3.73mg/l respectively, Gwagwalada river being also significantly different (P<0.05) from Jabi and Lower Usuma dams. PO4-P and NO4-N showed no significant (P>0.05) monthly variations in the three water bodies. However, TDS, Ca, K, and Na showed significant (P<0.05) difference in monthly variations in the three water bodies. TDS, Ca, K, and Na had all their wet season mean values higher than their dry season mean values in all the three water bodies studied, while PO4-P and NO4-N had their wet season mean values lower than the dry season mean values in the three water bodies.
Conclusion: The study revealed that the nutrient parameters measured were slightly lower than the World Health Organization (WHO) recommended values for aquatic life.
Comparative Study of Sun Drying and Solar Tent Drying of Hyperopisus bebe occidentalis
(Pakistan Journal of Nutrition, 2009) Kolo Reuben Jiya; Ojutiku R.O.; Mohammed M.L.
An experiment was conducted to investigate the effect of two drying processing methods on the nutritional qualities of Hyperopisus bebe. The two methods used were solar tent dryer and traditional sun drying methods. The experimental fish were dried for 120 h (5 days). The results of proximate analysis showed significant difference (p<0.05) between the two techniques. Organoleptic evaluation showed no physical damage, no discolouration in the treatments and both had firm texture though fishes under traditional sun drying were infected by insects.