Relative growth in rabbits: the effects of genetic line, diet and gender
Keywords:rabbit, allometry, genetic line, feed, carcass, tissue
The relative growth of different parts of the body and tissues was analysed using an allometric model. Animals were crossbred rabbits (males and females) from the mating of commercial lines HYLA-grand parental doe (HY-GPD) female with HYLA Coloured (HY-CO) or Grimaud (GR) males, both selected for the growth rate, or HY-GPD males, selected for weaning weight. They were fed on two different diet, mainly differing in their energy content, and the relative growth of the different parts of their body was assessed. The components with a nearly isometric growth pattern, which grew at the same mean rate as the rest of the body, were skin, chilled carcass and reference carcass; hind legs for retail cuts; and dorsal and carcass length for linear measurements. All allometric coefficients were calculated with respect to the slaughter weight, except percentage of hind leg inter-intramuscular fat (IIMF), which was calculated with respect to the weight of the hind leg. The components that showed early maturing were liver, kidneys, breast and rib viscera for offal and organs; head and breast and ribs for retail cuts; and bone and IIMF percentage of the hind leg. The components with late maturing were forelegs and loin for retail cuts, inguinal, scapular and perirenal fat, meat of the hind leg, and thigh and lumbar circumference length for carcass linear measurements. The GR line showed earlier growth for loin than the maternal HY-GPD line. In addition, the GR and HY-CO lines developed scapular and inguinal fat later than the HY-GPD line. For IIMF percentage, GR presented later growth than HY-CO and HY-GPD. The main effect of the diet was on liver development and on scapular fat: rabbits fed on the high-energy diet showed later liver and scapular fat growth.
Alagón G., Arce O., Serrano P., Ródenas L., Martínez-Paredes E., Cervera C., Pascual J.J., Pascual M. 2015. Effect of feeding diets containing barley, wheat and corn distillers dried grains with solubles on carcass traits and meat quality in growing rabbits. Meat Sci., 101: 56-62. https://doi.org/10.1016/j.meatsci.2014.10.029
Blasco A. (2017). Bayesian data analysis for animal scientists. New York: Springer. https://doi.org/10.1007/978-3-319-54274-4
Blasco A., Ouhayoun J. 1996. Harmonization of criteria and terminology in rabbit meat research. World Rabbit Sci., 4: 93-99. https://doi.org/10.1007/978-3-319-54274-4
Butterfield R.M., Zamora J., James A.M., Thompson J.M., Reddacliff K.J. 1983. Changes in body composition relative to weight and maturity in large and small strains of Australian Merino rams. 3. Body organs. Anim. Prod., 36: 461-470. https://doi.org/10.1017/S0003356100010515
Cantier A., Vezinhet R., Rouvier R., Dauzier L. 1969. Allométrie de croissance chez le lapin (O. Cuniculus). 1. Principaux organes et tissues. Ann. Biol. Anim. Bioch., 9: 5-39. https://doi.org/10.1051/rnd:19690101
Dabbou S., Gai F., Renna M., Rotolo L., Dabbou S., Lussiana C., Kovitvadhi A., Brugiapaglia A., De Marco M., Helal A.N., Zoccarato I., Gasco L. 2017. Inclusion of bilberry pomace in rabbit diets: Effects on carcass characteristics and meat quality. Meat Sci., 124: 77-83. https://doi.org/10.1016/j.meatsci.2016.10.013
Deltoro J., López, A.M. 1985. Allometric changes in rabbits. J. Agr. Sci., 105: 339-346. https://doi.org/10.1017/S0021859600056392
Evans D.G., Kempster A.J. 1979. The effects of genotype, sex and feeding regimen on pig carcass development. J. Agr. Sci., 93: 339-347. https://doi.org/10.1017/S0021859600038016
Fisher A.V., Green D.M., Whittemore C.T., Wood J.D., Schofield C.P. 2003. Growth of carcass components and its relation with conformation in pigs of three types. Meat Sci., 65: 639-650. https://doi.org/10.1016/S0309-1740(02)00266-8
Hammond J. 1932. Growth and development of mutton qualities in sheep. Oliver and Boyd, Edinburgh, Scotland.
Huxley J.S. 1932. Problems of relative growth. Methuen, London, UK.
Kouba M., Bonneau M. 2009. Compared development of intermuscular and subcutaneous fat in carcass and primal cuts of growing pigs from 30 to 140 kg body weight. Meat Sci., 81: 270-274. https://doi.org/10.1016/j.meatsci.2008.08.001
Lilja C. 1981. Postnatal growth and organ development in the goose. Growth, 45: 329-341.
Orengo J., Piles M., Rafel O., Ramon J., Gómez E.A. 2009. Crossbreeding parameters for growth and feed consumption traits from a five diallel mating scheme in rabbits. J. Anim. Sci., 87: 1896-1905. https://doi.org/10.2527/jas.2008-1029
Pascual M. 2007. Effect of selection for growth rate on carcass composition and meat quality in rabbits. PhD. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/1938
Pascual M., Pla M., Blasco A. 2008. Effect of selection for growth rate on relative growth in rabbits. J. Anim. Sci., 86: 3409-3417. https://doi.org/10.2527/jas.2008-0976
Pascual M, Soler M.D., Cervera C., Pla M, Pascual J.J., Blas E. 2014. Feeding programmes based on highly-digestible fibre weaning diets: Effects on health, growth performance and carcass and meat quality in rabbits. Livest. Sci., 169: 88-95. https://doi.org/10.1016/j.livsci.2014.07.007
Peiretti P.G., Meineri G. 2011. Effects of diets with increasing levels of Spirulina platensis on the carcass characteristics, meat quality and fatty acid composition of growing rabbits. Livest. Sci., 140: 218-224. https://doi.org/10.1016/j.livsci.2011.03.031
Peiretti P.G., Gai F., Rotolo L., Brugiapaglia A., Gasco L. 2013. Effects of tomato pomace supplementation on carcass characteristics and meat quality of fattening rabbits. Meat Sci., 95: 345-351. https://doi.org/10.1016/j.meatsci.2013.04.011
Pugliese C., Madonia G., Chiofalo V., Margiotta S., Acciaioli A., Gandini G. 2003. Comparison of the performances of Nero Siciliano pigs reared indoors and outdoors 1. Growth and carcass composition. Meat Sci., 65: 825-831. https://doi.org/10.1016/S0309-1740(02)00287-5
R Core Team, 2017. R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. https://www.R-project.org/
Rook A.J., Ellis M., Whittemore C.T., Phillips, P. 1987. Relationships between whole-body chemical composition, physically dissected carcass parts and backfat measurements in pigs. Anim. Prod., 44: 263-273. https://doi.org/10.1017/S0003356100018638
Vezinhet A., Prud’hon M. 1975. Evolution of various adipose deposits in growing rabbits and sheeps. Anim. Prod., 20: 363-370. https://doi.org/10.1017/S0003356100041155
Weber T.E., Trabue S.L., Ziemer C.J., Kerr, B.J. 2010. Evaluation of elevated dietary corn fiber from corn germ meal in growing female pigs. J. Anim. Sci., 88: 192-201. https://doi.org/10.2527/jas.2009-1896
Whittemore C.T. 1998. The Science and practice of pig production. (2nd ed.) Oxford. Longman Scientific and Technical.
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