ABSTRACT This experiment was conducted to evaluate the effects of walnut (T. conophorum) leaf and onion (A. cepa) bulb on the gut morphometry of Clarias gariepinus towards elucidating its mechanism of growth promotion. Twenty Clarias gariepinus juveniles (7.39±0.29g/ fish) were allocated to nine treatments, with three replicates each. Nine experimental diets were formulated at 40% crude protein representing different level of walnut leaf and onion bulb (0.5%, 1.0%, 1.5% and 2.0%) respectivel...
ABSTRACT The objective of establishing protected areas should be made to tally with needs and aspirations of the local community. Interaction between the local populace and the ecosystem plays a significant role in the determination of effective management. Overgrazing by cattle and deforestation by human activities over time has denuded the Obudu Cattle Ranch, Cross River State, Nigeria, of its lush natural flora. Consequently, its productivity as grassland has drastically been reduced. Den...
ABSTRACT Toxicity testing of chemicals on animals has been used for a long time to detect the potential hazards posed by chemicals to man. Bioassay technique has been the cornerstone of programmes on environmental health and chemical safety (Ward and Parrish, 1982). Lead is a potentially toxic chemical that may be directly ingested by man or indirectly through aquatic animals like fish and shellfish .The effects of lead on man include mental retardation, learning dysfuntion, and loss of coord...
ABSTRACT The deficit of domestic fish supply necessitates importation of frozen fish to supplement protein intake of Nigerians. Adequate quality standards and control measures are in place for frozen fish at the point of entry to the country. However, there is dearth of information on quality control along the distribution chain to the final consumer. Therefore, quality and handling procedures of imported frozen fish within Oyo State were investigated. Three-stage sampling procedures were us...
ABSTRACT This study examined the characteristics and management of street trees in Damaturu, the growing capital city of Yobe State, located in the Sudan savanah ecological zone of Nigeria. Enumeration of street trees was carried out in the major roads of Damaturu to identify tree species and determine population of the species. Data on the management of amenity trees in the town were collected through administration of questionnaire to forestry officials in the State’s Ministry of Environ...
ABSTRACT Inadequate alternative sources of energy and low income engender unsustainable exploitation of the environment by the inhabitants of semi arid regions. Literature abounds on the potentials of Jatropha curcas as an alternative source of energy. This study reports the awareness and acceptability of the energy and other potentials of J. curcas in Kano state. Primary data were collected using FGDs and a set of structured questionnaire administered randomly on 1280 farmers. Information we...
ABSTRACT Forest road construction appears to be the most expensive single investment in forest operations and designing forest road to specification is a complex engineering problem involving economic, environmental and social factors. The study was carried out to assess the technical compliances to recommended land owners guide to building forest access road in a forest estate in Nigeria. The study was carried out at Ondo State Afforestation Project (OSAP) Headquarters, South West Nigeria. D...
ABSTRACT A 12-week feeding trial was conducted in 27-cm3 circular plastic tanks (50 × 34 cm) to assess the performance of juvenile African catfish (Clarias gariepinus) fed diets containing African yam bean meals (Sphenostylis stenocarpa) processed by different techniques. Five 35% crude protein diets were formulated containing no yam bean meal (control) or 34% fishmeal and 66% yam bean meal. The yam bean meals were processed in four manners: (a) ‘cooked’, sun-dried, and ground, (b) ‘to...
ABSTRACT A study was carried out to determine the physico-chemical and heavy metal contents of the water and heavy sediments of Ekole River in Bayelsa State, Nigeria. Water and sediment samples were collected in the dry (December/ January) and wet (June/July) seasons during 1003 and 7004. Surface water up to 15cm depth and sediments were sampled at nine locations: 100, 200,400.500m upstream; 0. l00,100, 300.400111 downstream of an oil flow station. The samples were analyzed for total suspende...
ABSTRACT Adult Clarias gariepinus (African Catfish) were purchased from Eleiyele Lake and Zartech fish farm in Ibadan. Water samples were also collected in February (dry season) and June (rainy season), 2002. Gill, bone, intestine, muscle and water samples were analyzed for five metals: manganese, copper, zinc, iron, and chromium by atomic absorption spectroscopy (AAS) in two separate experiments. In each case, two tissues were compared with the levels of the metals in water viz: Gill, bone, ...