Twenty pieces of lean fish Oreochromis niloticus was used for this experiment. Ten were kench salted while the remaining ten were unsalted. The effect of dried and semi-dried rubber wood (Hevea brasillensis) as energy source on the quality of the smoked Tilapia using the improved Altona kiln while the electric oven served as the control. The study showed that Tilapia fish smoked with semi-dried rubber wood smoked faster as it took 1 hr. 15 minutes while those smoked with dried rubber wood took extra 30 minutes.
Bioremediation has become an attractive alternative to physicochemical methods of remediation of polluted sites. White rot fungi (WRF) are increasingly being investigated and used in bioremediation, because of their ability to degrade an extremely diverse range of very persistent or toxic environmental pollutants. The white rot fungus, Pleurotus tuberregium, was examined for its ability to ameliorate crude oil polluted soil. This was inferred from the ability of the polluted soil to support seed germination and seedling growth in Vigna unguiculata, 0, 7 and 14 days post treatment.
The bioaccumulation of iron, lead, mercury, copper, zinc and chromium from water by six species of fish, Malaptenus electricus, Synodontis clarias, Tilapia mariae, Tilipia zillii Mormyrops delicious and Hemichromis fasciatus from Ogba river, Benin City has been studied. All elements were found in the water and the concentration of lead, mercury and chromium exceeded the internationally allowable limits in drinking water suggesting that Ogba river is polluted. All heavy metals were bioaccumulated by the six species of fish.
The bioaccumulation of Cu, Zn, Mn, Cd, Cr, Ni and Pb in Wholefish, Gill, Offal and Carcass samples of Oreochromis niloticus and Hemichromis fasciatus from the upper reaches of Ogba river was monitored for the period January to December, 2000, using standard methods. The results showed that all metals were bioaccumulated. The levels of Zn, Cd and Ni in fish samples were lower than WHO and FEPA recommended maximum acceptable limits in food and drinking water, but the levels of Cu, Mn, Cr and Pb were higher than these limits.
Utilization of plantain peels (Kitchen waste) in the practical diets of African catfish hybrid was investigated in six (6) diets in which maize was replaced with plantain peels at 00.10,20,30,40 and 50% inclusion levels. At the end of seven-week feeding, juvenile African catfish hybrid showed significant difference (P0.05). The use of plantain peels as supplement feedstuff led to about a cut of half (1/2) the cost of maize in the diet of African catfish juvenile at 40 and 50% replacement.
The arthropod succession on buried carrion and decomposition rates of the African rat (Crycertomys gambianus) in both raining and dry seasons were determined. Three sets of the experiment were conducted from December 2002 to October 2003. For each experiment ten African giant rats with a mean weight of 1.55kg were used. Carcass in the December/March experiment representing the dry season decayed at a faster rate than those in the August/October which, represented the raining. season. Observation further revealed four orders of arthropods ranking in a decreasing order of abundance: Diptera.
Thonningia sanguinea Vahl.was observed to develop tyloses internally, as a result of intrusion of the host Hevea brasiliensis into its tissue. The tissues were also squeezed and xylem cells split off into strands. At the point of contact between T. sanguinea. And the host plant, enlarged tissues (galls) developed. Ecologically, the plant is hazardous to rubber as it dominates the plantation floor.
The demand for manpower in the capture fisheries industry of Lagos State was analysed. A total of thirty-five fishing companies were studied. Majority of the companies were discovered to be privately owned and less than five years old. The companies owned about twelve fishing vessels on the average with an average of 893.21 Gross Registered Tonnage (GRT). Capacity of vessel was revealed from the study to be the major determinant of the manpower demanded by the fishing companies.
The demand for manpower in the capture fisheries industry of Lagos State was analyzed. A total of thirty-five fishing companies were studied. Majority of the companies were discovered to be privately owned and less than five years old. The companies owned about twelve fishing vessels on the average with an average of 893.21 Gross Registered Tonnage (GRT). Capacity of vessel was revealed from the study to be the major determinant of the manpower demanded by the fishing companies.
In assessing women participation in vegetable production, a total of 100 respondents were sampled using questionnaire. Data were analyzed with frequency counts, percentages, means and hypothesis was tested using chi-square. More (44.0%) of the women were between 30 – 39 years, majority 91.0% were married, 53.0% have family sizes of 4 – 6 persons. Source of agricultural information was fellow farmers (means =2.24).