Triploidy induction in Heterobranchus longifilis (Family: Clariidae) by cold shock

Triploid was induced in African Catfish (Heterobranchus longifilis) by cold shocking activated eggs at 5 degree C for forty minutes starting 3-4 minutes after fertilization. Triploidy was confirmed from mitotic chromosomes prepared from embryo which showed 100% triploidy in the cold shocking treatment and 100% diploidy in the control treatmen

Embryogenesis of Heterobranchus longifilis (Curvier and Valenciennes, 1840)

Studies on development of H. longifilis (Curvier and Valenciennes, 1840) were conducted at a temperature of 25EC ( 1Ec) in aquaria tanks continuous development were monitored with the use of wild Heerbrugy photomacroscope and length of yolk and larva were monitored using Stereo Olympus microscope with ocular micrometer. The division into animal and vegetal poles was observed 22 minutes after activation. The first cleavage occurred 65 minutes after activation while the second division which was perpendicular to the first line of division occurred 74 minutes after activation. This was quickly followed by the third and fourth cleavage at 80th and 82nd minutes after activation respectively. Morular stage was reached at 4 hours 20 minutes with formation of optic bud at 14 hours 35 minutes. (DBO) Developing embryo hatched after 27 hours of activation at a mean length of 6.63 and mean yolk length of 2.17. Yolk size decrease at an average rate of 38.5 % till the 5th day of total absorption. Growth of larvae proceeded faster in tail-anus region than in anus-snout portion of the body. The rate of yolk absorption and larva development (survival) as monitored in this work gives important information in Research and development programme for H. longifilis larva - an important aspect of Research development and implementation of appropriate technologies in small scale fisherie

Role of Corporate Governance in the Financial Crisis; Evidence from Nigerian Banks

Accessing problems from the perceived causes usually leads to a relief or solution. This paper examines corporate governance and the Nigerian financial crisis which was majorly characterised by poor credit risk management, with the aim to determine the relationship that exists between corporate governance and credit risk management. Secondary data were gathered from 19 listed Nigerian banks for a 5 year period between 2005 and 2009; the postconsolidation to financial sector crash in Nigeria. Corporate governance is measured by statutory committee, committee independence, board size, board composition, executive duality and directors’ interest; while credit risk management is measured by non–performing loans ratio, loan loss provision, and loan to deposit ratio. The data were analysed by Ordinary least square panel data analysis. Findings revealed that banks with good corporate governance have better credit risk management. Results of the hypotheses tests revealed that there is a significant relationship between corporate governance and the credit risk management variables: non–performing loans ratio; loan loss provision; and loans to deposits ratio. This paper recommends that directors of banks should ensure compliance with corporate governance policies for a more thorough administration of the financial syste

Socio-economic Determinants of Adoption of Maize Production Technologies among Smallholders

Agricultural technology adoption is germane for improved farm efficiency and productivity. Thus, the socioeconomic determinants of adoption of maize production technologies among smallholders were analyzed. Primary data collected via multi-stage sampling from 101 respondents was empirically evaluated using descriptive statistics and Logit regression. The respondent’s socioeconomic factors affected maize production technology adoption. Several maize production technologies were available in the study area; however adoption of these technologies among respondents was relatively low. The coefficient of multiple determination (R2) was 0.74827. The regression coefficients of household size (0.541), education (0.331), farm experience (0.615), farm size (0.448) and extension contact (0.457) were statistically significant at p0.05 probability level. Furthermore, the constraints identified by respondents also affected the adoption of maize production technologies in the study area. This study recommends subsidizing technology cost, improved cooperative activities; access to technology, credit and extension services, farm labour supply and tenure policy modifications. 

Monetary Implication of Environmental Disamenities on Housing Investment in Lagos State: The Ojota Scenerio

Numerous studies have ascertained the diminutionary tendencies of disamenities such as solid waste landfills on real estate investments despite previous mixed conclusions. This study examines one of the four landfills in Lagos State- Olusosun landfill located in Ojota, Lagos and its estimated financial implication on the real estate market in Lagos State, Nigeria. A relational distance of 1 200m radius was established between the landfill and residential properties by which property values were measured based on consistent intervals of 300meters up to 1 200 meters in concentric rings. The study indicated within the Olusosun landfill neighbourhood, an increase in property values were evident as distance away from the landfills increased indicating that residential houses in close proximity to the landfills suffered value loss. Property appreciation relative to distance averaged 6% within the concentric rings of the landfill while the an estimated total loss on the real estate market via the landfill found to be approximately =N=2.1billion. The study recommended that if improved technology could not be utilised in the effective management of the various sanitary landfills within developed areas of the state, the current landfills in operation be closed down and relocated to the outskirts of the city to forestall a consistent appreciation in real estate investment in the state

Comparative Morphology and Taxonomic Study of Chlorophytum sabiense And Two Other Species in the Genus Chlorophytum Ker-Gawl

Chlorophytum sabiense Omok. (a newly identified species in the family Asparagaceae) is unique, having multiple styles emerging from fused ovaries. This specialized character may be overlooked in conjuring up archetype for the genus Chlorophytum, since the genus is characterized by single and simple style. Comparative morphology and taxonomic study of Chlorophytum sabiense and two other species in the genus (Chlorophytum macrophyllum and C. stenopetalum) was carried out to appraise level of relatedness of Chlorophytum. sabiense and these existing members. Distribution of the three species is sympatric in the North Central part of Nigeria. Chlorophytum sabiense may be confused with either of the two species because of the attributes they have in common. Samples collected were raised in a garden and closely observed for duration of three years. Data collected from morphological studies were analyzed statistically. The three species show similarity in most of the vegetative characters studied, however Chlorophytum sabiense is distinguished from the two others having; multiple styles, smaller fruit size and shorter length of pistil relative to the stamen. Exceptional characteristics exhibited by Chlorophytum sabiense makes it stand out among species in the genus, while its close resemblance with its allies accounts for reason why it had escaped recognition for a long time

Population dynamics of Chrysichthys nigrodigitatus (Lacépède, 1803) in Ikere-gorge, Oyo State, Nigeria

The growth and mortality parameters of Chrysichthys nigrodigitatus were estimated to assess the sustainability of its exploitation in Ikere-gorge, Oyo State, Nigeria. A total of 1210 of Chrys­ichthys nigrodigitatus were sampled from fishermen catches between January, 2017 and Decem­ber, 2018. C. nigrodigitatus were exploited with gillnet, cast net and traps (Malian trap net and bamboo). Total lengths were measured with fish measuring board. The FAO-ICLARM Stock Assessment Tool (FiSAT II) software was used to analyze length-frequency data of the fish. The estimated growth parameters are: asymptotic length is 60.9 cm, growth coefficient is 0.96, optimum length is 38.51 cm; length at maturity is 33.44 cm while length-at-first-capture is 12.62 cm. The estimated mortality parameters are: total mortality is 3.29 per year, natural mortality is 1.43 per year and fishing mortality is 1.86. It was observed that C. nigrodigitatus of Ikere-gorge were more vulnerable to exploitation at sizes less than their length at maturity. Likewise, the ex­ploitation rate (E = 0.57 yr-1) is greater than sustainable exploitation rate (Emax = 0.46 yr-1). This shows that exploitation of C. nigrodigitatus in Ikere-gorge is not sustainable. Therefore, there is need to reduce fishing pressure on C. nigrodigitatus to ensure its sustainability in Ikere-gorge

Income and crop diversification among farming households in a rural area of north central Nigeria

Income and crop diversification have been identified as essential strategies for raising income and reducing rural poverty. Both strategies were analyzed based on empirical data collected from rural households. The analysis was done using the Simpson Index of Diversity (SID) and Ordinary least square (OLS) regression analysis. The results revealed that diversification into a number of income sources and crops grown were very high. The determinants of income diversification were number of children less than 12 years old, number of adults above 60 years old, availability of electricity in the household and distance from local market. The determinants of crop diversification were, age and level of education of the household head, number of extension visits, availability of tractor hiring services and returns from crop production. Most households occupations in the study area were no longer agriculture based, however there willingness to diversify was significantly influenced by their socioeconomic characteristics.Key words: Income, Crop, Diversification, Rural area, Household