Thirty-two (32) rabbit bucks of 15-16 weeks (105-112 days) of age comprising of 10 bucks of New Zealand white (NZ), 11 bucks of Chinchilla (CH), and 11 bucks of Dutch (DH) breed with an average weight of 1266 g were used and the experiment lasted for 56 days with each rabbit in a pen. The study to determine relationships amongst carcass traits in some breeds of domestic rabbit (Oryctolagus cuniculus) bucks. All the parameters were weighed in grams with a digital weighing scale while the dressing percentage was calculated. The carcass traits taken were heart, liver, kidney, caecum, lungs, stomach, intestine, live weight, slaughtered weight, dressing weight, fore limb, thoracic cage, loin, skin, head, shank, hind limb, testis, body weight, dressing per cent. The degree of relationships amongst the carcass traits was determined using the Pearson Correlation Coefficient Procedure of SAS. There were several relationships with correlation coefficients ranging from high to low and positively and negatively correlated. The results obtained for relative organs gave positive and significantly (p<0.05) high correlation coefficients between heart and liver (r=0.663) and between intestine and stomach (r=0.570). There was no significant (p>0.05) difference amongst other relative organs but with positive correlation coefficients except between liver and lungs, kidney and caecum, caecum and lungs, caecum and intestine, lungs and stomach, lungs and intestine. For the other carcass traits (live weight, slaughtered weight, dressing weight, fore limb, thoracic cage, loin, skin, head, shank, hind limb, testis, body weight, and dressing per cent), the highest and positive correlation coefficient was obtained between live weight and slaughtered weight (r=0.992), and the least was between shank and testis (r=0.025). It also revealed that live weight had a highly significant (p<0.01) effect on slaughtered weight, dressing weight, fore limb thoracic cage, loin, skin, and hind limb. Therefore, selection for improvement should be carried out on carcass traits with high and positive correlation. More research should be conducted on relationships between carcass traits of domestic rabbit bucks of different breeds and ages.

The study was conducted using one hundred and fifty matured domestic pigeons to measure body linear parameters as well as external and internal egg quality characteristics in other to determine phenotypic relationships and predict body weight from body linear measurements. Data were collected on body weight, shank length, breast girth, body length, wing length, tail length and beak length at maturity. Two hundred eggs were collected and analyzed for both external and internal quality characteristics. The data obtained were analyzed using the correlation and regression procedure of SPSS Statistical software. The result obtained from this study body weight correlate positively with all other body linear parameters. However, the relationships between beak length and other body parameters except body weight were negative and mostly low. The strongest relationship in this study was between body weight and shank length. The coefficient of determination was highest for shank length (0.710), followed by wing length (0.680), breast girth (0.630) while tail length had the least coefficient of determination (0.360). It was suggested that the best equation for predicting body weight from linear body measurement could be: BW = 40.9+1.96BL-0.84WL+3.98BG+0.112SL. From the findings of this study, it was concluded that shank length is the most suitable body measurement that could be used for selection of domestic pigeon due to its strongest phenotypic correlation with body weight and other body parameters.