ABSTRACT
The effects of industrial wastewater from Port-Harcourt Refinery Company Limited on Ekerekana Creek, Rivers state were studied. This study was carried out in July and December 2015. Analyses focused on Lead, Cadmium, Copper, Chromium, pH, Phosphate, Nitrate, Temperature, Dissolve Oxygen, BOD5 and Total Hydrocarbon Content as some of the parameters of interest. Sterilized yellowish-brown bottles were used to collect samples from each location and fixed with concentrated HNO3 before transporting to the laboratory in iced coolers. Water samples from the different stations were analyzed using standard laboratory methods. Statistical Package for the Social Sciences (IBM- SPSS(C)) version 19.0, statistical package for windows and MS Excel was used in the analysis of data. The test of homogeneity of variance in Means of the variables was carried out using the one way ANOVA. Results obtained showed that for heavy metals concentrations, Cadmium varied between 0.03 mg/L and 0.70 mg/L (0.39 ±0.06), Lead varied between 0.09 mg/L and 0.65 mg/L (0.29 ±0.04), Chromium between 0.04 mg/L and 0.46 mg/L (0.23 ±0.03) and Copper 0.10 mg/L and 0.90 mg/L (0.45 ±0.06) respectively. Others include pH which varied between 5.7 and 6.8 (6.15 ±0.07), Dissolved Oxygen 3.40 mg/L and 6.40 mg/L (4.75 ±0.22). BOD and Turbidity varied between 6.20 mg/L and 9.90 mg/L (7.77 ±0.29) and 8.60NTU and 11.20NTU (9.80 ±0.20) respectively. General results show that station 2 (discharge point) had maximum concentrations of heavy metals and other contributory parameters, and their values were higher than World Health Organization (WHO) and National Environmental Standards and Regulation Enforcement Agency (NESREA) standards. The test of homogeneity of variance in means of the physical and chemical parameters revealed significant spatial inequality F(161.45)>Fcrit(4.49) at P = .05 across the sampling stations.
ABSTRACT
The present study was performed to observe the morphological details of the skulls of the major goat breeds in Nigeria involving 28 Red Sokoto, 24 Sahel and 12 West African Dwarf goats. The study revealed the presence of a bilateral opening in the nasal bones of the skulls. This unique occurrence appeared in about 70 of the Red Sokoto, less than 10 of the West African Dwarf and did not occur in the Sahel goat skulls. It was suggested that the structure which displayed a high level of breed specificity may be contributing to the weakness of the nasal area of the face. This finding to the best of our knowledge is rarely described in the literature and will be important in breed identification of goats and can contribute to the migratory history of the species.