No abstract

A study to evaluate the genetic similarities and differences among 11 specimens of cichlids and four specimens of mudcatfishes obtained from Warri River was carried out through DNA fingerprinting analysis using random amplified polymorphic DNA (RAPD)-PCR amplification with seven decamer primers and dendrograms through unweighted pair-group method with average (UPGMA) cluster analysis. The total number of bands generated by the seven RAPD primers, ranged between 2 to 33 for the cichlids and 8 to 28 for the catfish family, with band size between 100 to 800 bp. The primers produced 228 bands in total 119 for the cichlids and 109 for the catfishes, with 24% polymorphism. Considerable genetic variation was observed within species (especially within Tilapia zilli, T. guineensis and Clarias gariepinus), between species in the same genera (T. zilli and T. guineensis) and among cichlids and catfishes. The most consistent of the RAPD primers generated 87 bands among the cichlids with 23 bands (26%) polymorphic and 74% conserved. Among the catfishes, the primers produced 69 bands with 16 (23%) polymorphic. The data show that the RAPD technique was useful and sensitive in differentiating various fish genera and species.

The purpose of this study was to investigate whether age, sex, and marital status differences exist in preventing the occurrence of impaired driving among urban residents. Among other findings, the overwhelming proportion of the respondents were willing to intervene and prevent the occurrence of impaired driving. The research offers evidence that offering to drive the intoxicated person home or calling a taxi were the most frequently employed intervention techniques by the respondents. More females than males took keys away to prevent the occurrence of drunk-driving. Suggestions for future research are couched.

This paper explores factors antecedent to impaired driving in a Canadian urban community. Specifically, it attempts to investigate patterns of association between economic, demographic, social, and personal variables, and frequency of impaired driving. Cross-tabular analysis reveals that sex, age, marital status, employment status, occupation, standard of living, degree of loneliness, boredom, and depression are significantly associated with impaired driving. Multiple regression analysis was performed to determine which of the demographic, economic, social, and personal variables are most important in predicting impaired driving. The results indicate that three variables (standard of living satisfaction, frequency of getting together with friends, and gender) are significant predictors of impaired driving.

The “Brain Drain” phenomenon has been characterized as the dramatic migration often permanently, of specialized human capital from developing to the technologically advanced countries of the world, particularly to the United States of America and Canada where there are better work facilities, and attractive remunerations for professionals such as physicians, surgeons, engineers, lawyers and others. Apart from these relative economic opportunities, the prevalence of political stability and freedom in the developed countries serves as an attractive force for the lamentable loss of intellectuals and professionals from the developing to the developed nations.