1Department of Animal Science, Ahmadu Bello University, Zaria, Nigeria
2Department of Geography, Federal College of Education, Zaria, Nigeria
3Department of Soil Science, Ahmadu Bello University, Zaria, Nigeria
Receive Date: 10 September 2013,
Revise Date: 03 November 2013,
Accept Date: 30 November 2013
An experiment was conducted to determine the differences in body weight (BW), feed intake (FI) and some egg production traits of two strains of layer chickens (Isa Brown and Nera Black) and correlate the relationships between the tested traits. The study commenced when the layers were 26 weeks old and a total of 200 (100 of each strain) were used. Sixty fresh eggs (30 from each strain) were collected at 26th, 32nd and 38th weeks of lay. The results of analysis of variance for main effect of strain revealed significant (P<0.05) differences in BW with Isa Brown (IB) weighing heavier (1978 g) than Nera Black (NB) (1887 g). There was however no strain effect on FI. The values for the external egg quality traits for egg weight, shell weight and shell thickness were found, respectively as 58.06 g vs. 54.26 g, 5.4 g vs. 5.00 g and 0.44 mm vs. 0.31 mm in favour of IB. While the values for internal egg quality traits for albumen weight, yolk weight and yolk height were found, respectively as 36.46 g vs. 33.60 g, 15.60 g vs. 12.26 g and 1.86 cm vs. 1.62 cm in favour of IB. Other traits tested (egg lenght, egg width, albumin height and haugh unit) were unaffected by strain. Main effect of age showed that most of the internal and external egg traits decreased with increase in age of the layers. Yolk weight increased with increasing age of the layers, which implies that eggs from younger birds would be expected to have lower amount of cholesterol. The correlation analysis for most of the tested traits were positive. BW positively and significantly (P<0.05) correlated with FI (0.73) and egg weight (0.54). It was concluded that age numerically decreased most of the tested qualities of egg while srain had significant (P<0.05) effect on BW and some egg quality traits with Isa Brown performing better than Nera Black in northern guinea savannah of Nigeria.
Abutu J.A., Ugwu S.O.C. and Onyimonyi A.E. (2008). Comparison of the physical characteristics of egg laid by exotic and local hens at various ages. Pp. 635-639 in Proc. 42nd Ann. Conf., Anim. Sci. Ass. Nigeria. Ebonyi State Univ., Abakaliki. Adene D.F. and Oguntade A.E. (2006). The Structure and Importance of the Commercial and Village Based Poultry Industry in Nigeria. FAO, Agriculture Department, Animal Production and Health Divisionr. Alex O. (2001). Factors affecting controlling egg size. Poultry Specialist, Department of Agriculture and Marketing. Nova Scotia, Webmaster. Ayanwale B.A., Kudu Y.S., Shuaibu Y. and Tsado D.N. (2010). The performance of broilers fed three different protein levels. Pp. 405-408 in Proc. 35th Ann. Conf., Nigerian Soc. Anim. Prod. Nigeria. Boorman K.N., Volynchook J.G. and Belyavin C.G. (1989). Egg shell formation and quality. Pp. 35-45 in Recent Developments in Poultry Nutrition. J. Wiseman and P.C. Garnsworthy Eds., Butterworth’s Kent, England. Butcher G.D. and Miles R.D. (2003). Concepts of egg shell quality. University of Florida. Available at: http://edis.ifas.ufl.edu/pdffiles/VM/VM01300pdf. Accessed Jun. 2013. Bennett C.D. (1992). The influence of shell thickness in commercial broiler breeder flocks. J. Pure. Appl. Poult. 23, 61-65. Clunies M., Parks D. and Leeson S. (1992). Calcium and phosphorus metabolism and eggshell thickness in laying hens producing thick or thin shells. Poult. Sci. 75, 656-663. Coutts J.A. and Wilson G.C. (1990). Egg Quality Handbook. Queensland Department of Primary Industries. David A.R. (1980). Egg shell quality effect of dietary manipulations of protein, amino acid, energy and calcium in young hens on egg weight, shell quality and egg production. Poult. Sci. 59, 2047-2054. Duncan D.B. (1955). New multiple range test. Biometrics. 11, 1-42. Jones D.R. (2006). Conserving and monitoring shell egg quality. Pp. 157-165 in Proc. 18th Ann. Australia. Poult. Sci. Symp. Australia. Kabir M. and Olufemi O. (2013). Prediction of body weight from linear body measurements at eight weeks of age in two broiler breeds in northern Nigeria. Pp. 85-90 in Proc. 4th Nigerian Intern. Poult. Summit. Federal Univ., Agric. Abeokuta Nigeria. Kabir M. and Muhammad S.M. (2011). Comparative study of fertility and hatchability in Shika-brown commercial and parent stock egg-type chickens in Zaria-Nigeria. Nigerian Poult. Sci. J. 8, 37-41. Kabir M., Nwagu B.I. and Anthony A.V. (2010). Comparative study of growth and linear body measurements in Anak and Hubbard broiler breeds in the northern Guinea Savannah zone of Nigeria. J. Agric. Forest. Soc. Sci. 8(1), 188-194. Kabir M., Oni O.O. and Akpa G.N. (2007). Osborne selection index and semen traits interrelationships in Rhode Island Red and White Breeder Cocks. Int. J. Poult. Sci.6(12), 999-1002. Kabir M., Oni O.O., Akpa G.N. and Adeyinka I.A. (2006). Heritability estimates and the interrelationships of body weight and shank length in two strains of Rhode Island chickens. Pakistan J. Biol. Sci. 9(15), 2892-2896. Kekeocha C.C. (1984). Pfizer Poultry Production Handbook. Macmillan Publishers, London. Koelkebeck K.W. (1999). What is egg quality and conserving it? UniversityaofaIllinois.aAvailableaat: http://www.traill.uiuc.edu/poultrynet/paperdisplay.cfm?contentid=522. Accessed Mar. 2013. Kul S. and Seker I. (2004). Phenotypic correlations between some external and internal egg quality traits in the Japanese quail. Int. J. Poult. Sci. 3(6), 400-405. McFerran J.B. and Adair B.M. (2003). Diseases of Poultry. Iowa State Press, Ames, Iowa. Nwankwo S.U. and Omeje S.I. (2009). The effects of genotype, egg size and body weight of three strains of layer chickens on egg quality traits. Pp. 93-95 in Proc. 14th Ann. Conf., Anim. Sci. Ass. Nigerian Lautech, Ogbomoso, Nigeria. Ojedapo L.O., Adedeji T.A., Alayeni T.B., Ameen S.A., Amao S.R., Abanikannda O.T.F. and Fasasi K.M. (2008). Phenotypic correlation between internal and external egg quality traits of a commercial layer strain. Pp. 31-33 in Proc. 33rd Ann. Conf., Nigerian Soc. Anim. Prod.Ogbomoso, Nigeria. Olawumi S.O. and Ogunlade J.T. (2009). The effect of genotype and age of layer breeds on egg quality traits. Nigerian J. Anim. Prod. 36(2), 228-236. Oluyemi J.A. and Roberts F.A. (2000). Poultry Production in Warm Climates. Macmillan Press. London. Ozcelik M. (2002). The phenotypic correlation among some external and internal quality characteristics in Japanese quail eggs. Vet. J. Ankara Univ.49, 67-72. Ricklefs R.E. (1983). Egg characteristics of lines of Japanese quail selected for 4 weeks body mass. Poult. Sci. 63, 1330-1337. SAS Institute. (2002). SAS®/STAT Software, Release 9.2. SAS Institute, Inc., Cary, NC. Sogunle O.M., Egbeyale L.T., Adeniran K.A. and Fanimo A.O. (2009). Comparison of internal and external qualities of eggs from strains of egg-type chickens. Pp. 30-32 in Proc. 14th Ann. Conf., Anim. Sci. Ass. Nigeria.Lautech, Ogbomoso, Nigeria. Solomon S.E. (1991). Egg and Eggshell Quality. Wolfe Publishing Ltd, London, England. Stadelman W.J. (1977). Quality identification of egg. Pp. 3-8 inEgg Science Technology.J.W. Stadelman, D. Newkirk and L. Newby, Eds.,CRC Press.