Browsing by Author "Essien, A. I."
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Item Effects of Age and Sex on Some Carcass Traits In The Indigenous Nigerian Pigs(1987) Fetuga, B. L.; Essien, A. I.Animal growth is characterized by two significant changes in the tissues, namely: increase in size and weight, and changes in the proportion and distribution of these tissues with respect to other carcass components. The commercial quality of a pig carcass is determined by the proportions of these tissues which in turn depend on: the age of the animal (McMeekan, 1940 and Barry et al., 1970) sex (Charette, 1961; Blair and English, 1965 and Knudson et a(., 1985), breed (Fetuga et al., 1976 and Evans and Kempster, 1979), nutrition (Hanson et al., 1975; Carden and Goenaga, 1979 and Davies et al., 1980).Item Short-Term Effects of Age, Egg Production Rate and Oviposition Time on Shell Quality and Albumen + Yolk Proportions of Harco Strain Layers(1992) Essien, A. I.; Department of Animal Science, University of Cross River State Okuku, Nigeria.One hundred and forty-four newly-laid eggs produced by the Harco Strain of chickens aged 5weeks were used in the evaluation of the effects of layer age, egg production rate oviposition a 12-week study, values for shell weight. Albumen + yolk weight, percentage albumen + yolk for eggs laid in the morning were significantly (P<0.05) higher than for the eggs laid in the afternoon. Eggs laid in the afternoon had thicker (P<0.05) shells and higher percentage shell weights. Correlation coefficients (r) between shell weight, percentage shell weight, shell thickness, albumen + yolk weight, percentage albumen + yolk and age of layers were 0.42, 0.25, 0.71, 0.58 and -0.26 respectively, while r values with percentage hen-day production as independent Variable were -0.48, -0.34, 0.32,-0.38, 0.35. Shell thickness was negatively correlated with shell weight (0.51)) and egg weight (-0.49)respectively.
