Wildlife & Fisheries management
Permanent URI for this communityhttps://repository.ui.edu.ng/handle/123456789/492
Browse
39 results
Search Results
Item Comparison of economic feasibility and sensory characteristics of giant land snail with selected bushmeats(2014-06) Oduntan, O. O.; Shotuyo, A. L. A.; Akinyemi, A. F.; Osunsina, I. O. O.; Ayodele, A. I.Item Wildlife-human interface: a case study of Obudu cattle ranch, Cross River state, Nigeria(California Digital Library, University of California, 2010) Akinyemi, A. F.Item Importance of wildlife and non-timber forest products of the Cross River rainforest, Nigeria(Tropbase Printers, Port Harcourt, 2010) Edet, D. I.; Akinyemi, A. F.Item Evaluation of African catfish Clarias gariepinus responses to graded levels of zinc practical diet(2016) Umma, S. B.; Olukunle, O.Fisheries and aquaculture contribute significantly to food security and livelihood; therefore, fish and fish products are projected as being among the most widely traded foods. Fish like other animals has requirement for essential nutrients in order to grow properly. Such essential foods are available in the wild for fish to forage extensively to meet their body needs. The variable factors such as climate change, environment, season of the year and location among others determines the abundance and search for these foods. These factors modifies aquatic environment and make it difficult for fish in the wild to forage adequately. Therefore, enough food in the form of artificial diet is required to furnish fish with the nutrients it need out of its natural environment for optimal growth. However, most of the challenges facing the formulation of feed are on the affordability, ready acceptability and bioavailability for fish optimal growth. Therefore, trace minerals which are needed in minute quantity at a time for the general health maintenance and growth of an animal offers a soft landing to this challenges; however, their deficiency perturbs the wellbeing of the fish. Zinc has been recognized to play a vital role in almost every aspect of living system either directly or indirectly. The biochemical components of fish diet that needs varying in terms of percent inclusion to render the protein in feed more bioavailable should be encouraged. The objectives of this study includes determination of the; required dietary zinc inclusion that is essential for juvenile African catfish Clarias gariepinus growth, serum biochemical profile of African catfish juveniles post feeding response to growth, and haematological responses of African catfish (Clarias gariepinus) to graded levels of zinc nutrient. Growth performance, serum biochemistry and physiological response to graded levels of practical dietary zinc fed to African catfish (Clarias gariepinus) juvenile were investigated. Water quality was monitored throughout the period of the study and the results showed that all parameters were within the required and tolerable ranges for catfish. The mean weight of fish fed dietborne zinc nutrients revealed that there were no significant differences in growth responses to graded levels of dietary zinc inclusions of 0, 5.46, 10.96, 16.40, 21.86 and 27.33mg Znkg-1 . The results for the mean weight revealed that there are no significant variations in mean weight since P>0.05. However the mean weight for the diet increased with respect to dietary zinc inclusion (Figure 1). The SGR, FCR, GFCE, F.I and RGR, also showed no significant variations among fish fed. The PCV revealed that there are no significant variations among the values for the fish fed with Diets 3, 4 and 5. The serum biochemistry revealed significant variations in the serum total protein (T,P) among fish fed on all the Diets, with the highest values in fish fed Diets 4 and the minimum values in fish fed Diet 2. Fish fed dietary zinc had slightly altered haematological and serum biochemistry in response to dietary zinc.Item The growth performance and survival of Clarias gariepinus fry raised in homestead concrete tanks(Academic Journals Inc., 2012) Olukunle, O.Fertilizer application in earthen ponds has been used as a low-cost method of sustainable aquaculture production. This study was carried out to investigate the growth response of African catfish fry, Clarias gariepinus in three different culture media in homestead concrete tanks. The water in the control (T1) was not treated while T2 and T3 were treated with poultry droppings and soy bean milk filtrate, respectively. Nine hundred catfish fry weighing averagely 0.67-0.69 g were randomly allocated to the 3 treatments in equal number. In each tank (2x3x1.5 m) were suspended, 3 net cages each of dimension, 1x1x1 m containing 100 fry. The fish in tank 1 (control treatment) were fed fish meal from the start at 5% of their body weight and four times daily. The other treatments were not fed at all for the first 7 days. Feeding with fishmeal commenced for treatments T2 and T3 on the next 8-14 day. The weights of the feed were adjusted after weekly weighing of the culture media for phytoplankton composition. The best weight increase was recorded in T1 (2.33 g). The highest survival rate was in T3 (98%). Treatment T3 (11.56±1.14x103) generated higher concentrations of most of identified zooplanktons than treatments T1 (5.39±0.73x103) and T2 (12.78±0.98x103). These zooplanktons were absent in treatments T1 and T2. The result indicates that fertilizing the culture medium using soybean milk filtrate or poultry droppings improved the growth and of C. gariepinus.Item Effect of partial replacement of soybean meal with jackbean (Canavalia ensiformis) as an alternative plant protein in the practical diets of cat fish (Clarias gariepinus)(2015) Olukunle, O. A.; Oshoke, O. J.; Idowu, O. G.This study assessed the potentials of Jackbean seed meal (JBSM) for partial replacement of soybean in diets of Clarias gariepinus. Hence, five diets were formulated at 40% crude protein level as Soybean in control diet (CD) was replaced progressively at (5%, 10%, 15% and 20%) by JBSM in test diets TD1, TD2, TD3, TD 4 respectively. The Jackbean seeds were treated by dehulling, soaking in ash and followed by boiling to reduce the anti nutritional content (canavanine) present in the seeds. Fifteen plastic tanks of (37 liters) containing 25 liters of water was used for growth trial. Each treatment contained 15 fingerlings with an average weight of 6.44 ± 0.1g in three replicates per treatment. Test fish in each tank were fed 5% of their biomass twice daily for 84days. At the end of the experiment proximate composition and growth parameters were analyzed. Result showed that fish fed TD 1 (5% inclusion level) and TD2 (10% inclusion level) compared favourably with the control diet (P ? 0.05). Fish fed control diet had the best specific growth rate (0.54) and feed efficiencies (Protein Efficiency Ratio (PER)= 0.41 and (Food Conversion Ratio, FCR= 6.57). However, considering the results of the statistical analysis used to compare the difference between the means of the different treatment, TD1 (5% inclusion level) compared most favourable with the control in terms of mean weight gain (8.87), specific growth rate (0.39) which was significantly different (P ? 0.05) from other treatments, PER from CD, TD3 and TD4 which are not significantly different (P ? 0.05) from TD2, and FCR (9.41) which was not significantly different (P ? 0.05) from CD but significantly different (P ? 0.05) from TD2, TD3 and TD4. From the results of this study, it shows that 5% of soybean in the diet can be replaced with JBMS without any adverse effect on the growth performance.Item Fishery resources(2011) Olukunle, O.Item Assessment of some commercial feed brands in Nigeria on growth performance of Clarias gariepinus fingerlings(2016) Olukunle, O.; Ekundayo, I. O."This study assessed three commonly-available commercial catfish feed brands on growth, survival and nutrient utilization of Clarias gariepinus fingerlings under controlled conditions; providing information on the integrity and quality of some of the feeds in the market. C. gariepinus fingerlings (3.83± 0.22g) were fed to satiation twice daily at 9.00hr and 18.00hr with 2mm pellet size of three commercial diets scripted TD, TT, and TV in concrete tanks. Growth performance and nutrients utilization parameters were measured and calculated; water quality parameters were controlled using a partial flow-through system. ANOV A showed that there were significant differences (P<0.05) in the mean weight gain, specific growth rate, survival rate, food conversion rate, nitrogen metabolism and protein efficiency ratio. TV had the most significant value for mean weight gain (41.54 ± 4.09g), specific growth rate (1.65 ± 0.04g/day), feed conversion rate (0.7), nitrogen metabolism (951.91), and protein efficiency ratio (2.57) with 90.00 ± 5.0% survival rate; TD had significantly highest survival rate (92.50 ± 4.51%) with mean weight gain 36.77 ± 0.48g. Proximate analysis of TD, TT and TV revealed that macronutrients therein significantly different from the brands' claim, except TD. This study revealed that, for fast fish growth on less expensive feed desired by catfish farmers, commercial catfish feed brand tagged TV, was the best, giving a better growth performance and nutrient utilization, at 48.3% CP, 6.01% Fat, and 3.03% CF.Item Integrated aquaculture: a tool for sustainable development/food security and poverty alleviation in achieving MDG’s goals(2014) Olukunle, O.Aquaculture is a multiculture of plants and animals in an aquatic environment. Thereby aquaculture is enriched through integration of formerly existing cultivation of crops cum horticultural, and /or agronomical or domesticated animals such as piggery, poultry, rabbitery or even wild domesticated animals such as guinea fowls, and cane rats. Hence, this study investigated integrated aquaculture cum horticulture as a possible tool for sustainable food production in order to ensure food security in Nigeria and alleviate poverty. The study utilized four homestead concrete tanks located at the back of my house in University of Ibadan senior staff quarters. Catfish bloodstock’s males and females were used to raise fry through fingerlings to juveniles to adult fish. Data were taken at each stage of the fish life cycle i.e. the products harvested and sales. Data on numbers of horticultural trees planted were taken and numbers of produce at harvest were recorded. These data were collated and analyzed yearly and at the end of the 10- year period. The result showed that diversification in integrated aquaculture ensures better environmental and on farm resource management which is much needed globally but much more in the developing countries for food security and poverty alleviation. At each point in time, there is one product or the other available for consumption or for sale which ensured better cash flow. During the dry season the drought was ameliorated by the availability of water for wetting the crops and incorporation of vegetables growing into the system. Horticulture cum fish farming integrated system has been adjudged recently to be a solution to drought, poor soil condition management; climate change along with unsustainable water management and farming practices. This study showed that this system is more natural and sustains better food production practice. It is capable of bringing food production closer to urban consumers who do not have access for extensive farm land and reduces the transport cost in retail food marketing.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.