Browsing by Author "Adeyemo, O. K."

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Clinic and laboratory manual: veterinary public health-preventive medicine-wildlife and fish diseases
(2008) Adeyemi, I. G.; Alonge, D. O.; Agbede, S. A.; Ogundipe, G. A. T.; Ishola, O. O; Babalobi, O. O.; Ijagbone, I. F.; Cadmus, S. I. B.; Adedeji, O. B.; Adeyemo, O. K.; Olugasa, B. O.; Adetunji, V. O.; Olatoye, I. O.; Awosanya, A. E. J.; Ojomo, B.; Agboola, B. B.
Comparative evaluation of productivity and cost effectiveness of catfish fingerling production in earthen pond and recirculation system in Ibadan, Nigeria
(2011) Adeyemo, O. K.; Ganiyu, O. I.; Olugasa, B. O.
Despite the popularity of the African catfish and its great market potentials, the production is still basically at subsistence level due majorly to inadequate supply of seed for stocking. This has been linked to the absence of reliable production techniques for the mass production and rearing of the species under practical farming conditions. The purpose of this study therefore, was to find a suitable culture system for the mass production of catfish (Clarias gariepinus) fingerlings. Protected earthen pond and a unit of recirculation system were used. Fertilized eggs from female were divided into two equal halves and incubated under the same conditions. Forty-nine thousand frys each were stocked into the protected earthen pond and a unit recirculation system respectively. The frys in the two systems were raised for twenty one days and fed the same quantity and quality of feed throughout the period. The survival rate of the frys in the recirculation system was 79% as against 17% in the earthen pond. However, bigger sized (2.2 ± 0.23g) fingerlings were obtained from the earthen pond relative to those cultured in the recirculation system (0.9 ± 0.07g). The cost of raising frys in a recirculation system (N34,000) was twice that needed for earthen pond (N17,000), but this was more than made up for in the profit from sales, which was N311,360 and N99,156 respectively. The main reason for fish farming is the expected return to be, therefore, the choice of income-generating activities, amongst several options available, should be made on the grounds of their expected returns.
Comparative evaluation of productivity and cost effectiveness of catfish fingerling production in earthen pond and recirculation system in Ibadan, Nigeria
(2011) Adeyemo, O. K.; Ganiyu, O. I.; Olugasa, B. O.
Despite the popularity of the African catfish and its great market potentials, the production is still basically at subsistence level due majorly to inadequate supply of seed for stocking. This has been linked to the absence of reliable production techniques for the mass production and rearing of the species under practical farming conditions. The purpose of this study therefore, was to find a suitable culture system for the mass production of catfish (Clarias gariepinus) fingerlings. Protected earthen pond and a unit of recirculation system were used. Fertilized eggs from female were divided into two equal halves and incubated under the same conditions. Forty-nine thousand frys each were stocked into the protected earthen pond and a unit recirculation system respectively. The frys in the two systems were raised for twenty one days and fed the same quantity and quality of feed throughout the period. The survival rate of the frys in the recirculation system was 79% as against 17% in the earthen pond. However, bigger sized (2.2 ± 0.23g) fingerlings were obtained from the earthen pond relative to those cultured in the recirculation system (0.9 ± 0.07g). The cost of raising frys in a recirculation system (N34,000) was twice that needed for earthen pond (N17,000), but this was more than made up for in the profit from sales, which was N311,360 and N99,156 respectively. The main reason for fish farming is the expected return to be, therefore, the choice of income-generating activities, amongst several options available, should be made on the grounds of their expected returns.
Diazinon-induced clastogenity and pathological changes in ovaries and testes of clarias gariepinus
(Scientific Research Publishing, 2014) Ola-Davies, O. E; Fagbohun, A. F.; Emikpe, B. O.; Adeyemo, O. K.
In most tropical developing countries, one of the problems facing aquaculture industry is the pollution of ponds and rivers with pesticides. Chemicals such as diazinon, an organophosphate pesticide, originating from agricultural activity enter the aquatic environment through atmospheric deposition, surface run-off or leaching. Pollutants enter the food chain through accumulation in soft bottom sediment and aquatic organisms. However, information on how these pesticides affect inhabiting organisms is often not available. In a triplicate experimental set-up, seventy-two (72) apparently healthy catfish comprising adult and juvenile of both sexes were therefore exposed to a previously determined no effect concentration (0.405 ppm) of diazinon. Another set of fish was exposed to 0.0625 μg sodium arsenite, a known clastogen, which was used as the positive control, while another set of catfish exposed to the culture water alone was the negative control. Adults and juveniles were exposed separately to avoid cannibalism. After 48 hours of exposure, micronuclei induction was determined in subsets of experimental groups, while exposure continued for 28days. Catfish organs were harvested on days 21 and 28 to determine the effect of long-term exposure to diazinon on histology. Water quality was also monitored before and during exposure in the experimental groups. The result established a significantly high mean micronucleated polychromatic erythrocytes (15.00) in catfish exposed to diazinon suggesting genetic damage (normal is ≤4). The MPE in sodium arsenite exposed fish was 28, while that of the control group was below 4. Effect of sex and age on micronuclei induction was not significant. Histological alteration observed in the ovary and testis was distorted matured cells and extensive testicular degeneration, respectively. The results show that diazinon has clastogenic effect, and may have endocrine disrupting properties because of the histological changes induced in the ovaries and testis.
Geographical Information System (GIS) Mapping of Spatio-Temporal pollution status of Rivers in Ibadan, Nigeria
(Asian Network for Soioniifio Information, 2008) Adeyemo, O. K.; Babalobi, O. O.
More accurate spatio-temporal predictions of urban environment arc needed as a basis for assessing exposures as a part of environmental studies and to inform urban protection policy and management. In this study, an information system was developed to manage die physico-chemical pollution information of Ibadan river system. Oyo Slate, Southwest Nigeria. The study took into account die seasonal influences of point and non-point discharges on die levels of physico-chemical parameters. The overall sensitivity of the watershed to physicochemical environmental pollution revealed dial during dry season, of the 22 (100%) sample points, only 3(13.6%) were unpolluted, 6 (27.3%) were slightly polluted, 10 (45.4%) were moderately polluted. 2 (91%) were seriously polluted and 1 (4.5%) was exceptionally polluted During rainy season, 3 (13.6%) were unpolluted. 7 (31.8%) were slightly polluted, 9 (40.9%) were moderately polluted, 2 (9.1%) were seriously polluted and 1 (4.5%) was exceptionally polluted There is a considerable environmental risk associated with the present level of pollution of the Ibadan river water body on fish health and biodiversity This research provides a basis for aquatic management and assist in policy making at national and international levels Appropriate strategies for the control of point and non-point pollution sources, amendments and enforcement of legislation should be developed.
Investigations into the use of xylopia aethiopica in the treatment of psoroptic mange in rabbits
(2001) Adeyemo, O. K.; Ajasin, F. O.; Ola-Davies, E. O.; Taiwo, O. O.
Objective: To evaluate the efficacy of Xylopia aethiopica (XA) in the treatment of mange in rabbits. Materials and methods: The efficacy of dried and grounded 30 g and 40 g of XA respectively mixed with 20 ml of palm oil was tested on different sets of mange infested rabbits and this was compared with sulphur, using 80 g of sulphur mixed with 20ml of palm oil. Results: XA was found to be more potent at 40 g relative to 80 g of sulphur, also the rabbits treated with 30 g and 40 g XA’s weight gain during treatment was more significant (p< 0.05) than the control. Conclusion: Our study shows that Xylopia aethiopica exhibits remarkable anti-mange activity against psoroptic mange in rabbits. Further investigations into the isolation of the active constituent responsible for this action is recommended.
Seasonal limnological variation and nutrient load of the river system in Ibadan Metropolis, Nigeria
(EuroJournal publishing inc., 2008) Adedokun, O. A.; Adeyemo, O. K.; Adeleye, E.; Yusuf, R. K.
Ibadan is a highly populated city, characterized by environmental problems arising from improper disposal of solid and liquid wastes, poor wastes collection and handling. We therefore investigated the seasonal limnology and nutrient load of the river system in Ibadan metropolis, Nigeria during the dry season (October 2003-March 2004) and rainy season (August-September 2004). The results revealed that colour, Total suspended solid (TSS), total solids (TS) and total nitrogen were generally higher during the dry season. This suggests that the run-offs have only a diluting effect on these parameters. All the other physical parameters (pH, BOD, DO, COD, TDS, Total hardness) and Nutrient load based parameters (phosphate, sulphate, nitrate and nitrite) were generally higher during the rainy season. Also, in most of the sample points, BOD, TDS, TSS, colour and phosphate levels were relatively higher than the WHO standards for surface water during the two seasons. The poor water quality and nutrient loading observed in the study area has severe consequences on the in-dwelling aquatic flora and fauna. Proper treatment of effluent from industrial processes to acceptable levels, discouraging stagnation of domestic waste and sewage, availability of sewage treatment plants is necessary to curtail the health risk associated with the present level of pollution observed during this study.