Strategies for increasing freshwater fish production in the Green Revolution Programme

Sources of fish and fishery products in Nigeria were reviewed. The problems of various agencies involved in freshwater fish production in Nigeria were also analysed, such problems included shortage of manpower, inadequate training for personnel, shortage of funds, lack of infrastructures, among other

Length-weight relationship and the diets of Clarias lazera (Cuvier and Valenciennes), family Clariidae (Osteichthyes: Siluriformes) in Zaria, Nigeria

The length-weight relationship and the diets of Clarias lazera were investigated between July 1981 and June 1982. About 450 specimens were examined. The standard lengths of the fish ranged from 8.5 cm to 42.2 cm. Significant differences were found between the standard lengths of the males and females with the latter slightly shorter. Somatic weights varied between 10 g to 502 g. Length-weight regression analysis gave a "b" value of 3.02 for both males and females combined; thus indicating an isometric growth. Analysis of the food in the stomachs showed that the fish is an omnivore although, it fed more on insects and fish than other food item

The effect of replacement of soyabean meal with blood meal on the growth of mudfish Clarias anguillaris (L) fingerlings

Blood meal and full fat soyabean meal were mixed in different proportions to give 0%, 10%, 25%, 50%, 75%, 90% and 100% meal in the protein fraction of the diet and fed to Claria anguillaris fingerlings in floating hapas. The growth performance of the fingerlings were monitored for 84 days. At the end of the experiment the mean weight of the fingerlings increased in the level of blood meal up to 50% blood meal in the diet after which there was a decline in the mean weight of the fish. This same level of blood meal gave the best specific growth rate, feed conversion efficiency and protein efficiency ratio. Thus the nutritive value of blood meal was enhanced by the addition of an equal level of full fat soyabean meal in the die

Petrophysical and rock physics analyses for characterization of complex sands in deepwater Niger delta, Nigeria

Characterization of complex sand reservoirs in deepwater of Niger Delta was carried out through petrophysical and rock physics evaluation of well log data from three wells. Petrophysical analysis to determine clay volume, porosity, lithologies and hydrocarbon saturation were made. Rock physics was studied in velocity-porosity plane to analyze the influence of depositional and diagenetic features on the reservoirs. Cross-plots of different elastic parameters, using linear regression and cluster analysis, were generated for lithologic and fluid fill identification and to differentiate between the hydrocarbon bearing sands, brine sands and shale. Variance attribute was extracted on seismic time slice in order to image the complex sand distribution in the area. Three reservoirs of turbidite origin were identified within the upper fan to lower fan area. Petrophysical results revealed gas bearing reservoir units with less than 20% shale volume and porosity of 25-31%. Lambda-Mu-Rho (LMR) cross-plots for the reservoirs show gas saturated data cloud and trend. Ratio-Difference (R-D) cluster analysis of elastic rock properties shows a distinct trend and data cloud that represents lithofacies units and fluid fills. The study concludes that the reservoirs simulated contact cement and friable models with properties that ranged from highly porous, well sorted and poorly consolidated sand to fairly sorted and highly cemented sands. The results provide a model that increases the possibility of finding reservoir sand, while mitigating the risk involved in finding hydrocarbons

Measuring information security breach impact and uncertainties under various information sharing scenarios

This study draws on information theory and aims to provide simulated evidence using real historical and statistical data to demonstrate how various levels of integration moderate the impact and uncertainties of information security breach on supply chain performance. We find that the supply chain behaves differently under various levels of integration when a security breach occurs. The entropy analysis revealed that the wholesaler experience the most uncertainty under system failure and data corruption. This sort of impact-uncertainty information will aid in designing and managing a resilient supply chain poised for minimal breach impact

Petrophysical and rock physics analyses for characterization of complex sands in deepwater Niger delta, Nigeria

Characterization of complex sand reservoirs in deepwater of Niger Delta was carried out through petrophysical and rock physics evaluation of well log data from three wells. Petrophysical analysis to determine clay volume, porosity, lithologies and hydrocarbon saturation were made. Rock physics was studied in velocity-porosity plane to analyze the influence of depositional and diagenetic features on the reservoirs. Cross-plots of different elastic parameters, using linear regression and cluster analysis, were generated for lithologic and fluid fill identification and to differentiate between the hydrocarbon bearing sands, brine sands and shale. Variance attribute was extracted on seismic time slice in order to image the complex sand distribution in the area. Three reservoirs of turbidite origin were identified within the upper fan to lower fan area. Petrophysical results revealed gas bearing reservoir units with less than 20% shale volume and porosity of 25-31%. Lambda-Mu-Rho (LMR) cross-plots for the reservoirs show gas saturated data cloud and trend. Ratio-Difference (R-D) cluster analysis of elastic rock properties shows a distinct trend and data cloud that represents lithofacies units and fluid fills. The study concludes that the reservoirs simulated contact cement and friable models with properties that ranged from highly porous, well sorted and poorly consolidated sand to fairly sorted and highly cemented sands. The results provide a model that increases the possibility of finding reservoir sand, while mitigating the risk involved in finding hydrocarbons

The application of the boundary integral equation method to foundation dynamics

Imperial Users onl

Leadership Behaviour and Worker Performance in the Nigerian Construction Industry

Leadership is a dynamic process in which an individual influence other to contribute to the achievement of an assigned task. This paper investigates leadership behaviour and its impact on construction workers’ performance in Lagos, Nigeria. Purposive sampling technique was adopted to select 50 site-supervisors and 250 construction-workers involved in simple construction works. An investigation was carried out using a questionnaire survey method. The leadership variables investigated were ranked, regressed and correlated to workers performance. From the primary data analysis, leadership behaviour exhibited by supervisors were found to influence the site workers commitment to achieving the goal of the construction projects. The most exhibited leadership behaviour on the studied construction site is transformational leadership behaviour with an overall mean score of 4.09. There also exists a positive linear correlation of transactional leadership behaviour with construction workers performance. Findings revealed that the adoption of laissez-faire leadership behaviour results in negative correlation with construction workers performance. The study concludes that the success of construction projects depends on the project manager and its employees, therefore leadership qualities is an important skill that everyone in the construction industry should possess as it enhances the timely delivery of construction works

A Critical Examination of the Multinational Companies Anti-corruption Policy in Nigeria

In contemporary enterprise and organisational culture, many companies are increasingly willing to increase their profits and to gain competitive advantages through indulgence in bribery, corruption, money laundering and other anti-social practices that shows little regard for social obligations and even laws. Companies cemented their social relations by claims of socially responsible and of ethical conduct, but the evidence in practice proves otherwise. The bourgeoning corporate social responsibility literature rarely examines predatory practices of MNCs even though the practices affect a variety of stakeholders. This paper draws attention to the gaps between corporate anti-corruption policy and acts. The paper used publicly available evidence to provide case studies to show that companies engaged in bribery, corruption and money laundering as against their claims of responsible social conduct. The paper argued that MNCs have used the political elite in developing countries to seek to advance their global earnings and competitive advantages by offering bribes and other inducements to secure government contracts in Nigeria. It also encourages reflections on endemic corrupt practices and offers some suggestions for reform