Growing and developing mean the changes of the organism in the course of time, and the live weight is used generally as a parameter to describe these differences. Growth rate is not equal in a wider interval, but there is strong correlation with the changes of the body proportion and it depends on the genotype and the feeding intensity. In the present study, the authors used two genotype (the early mature New Zealand White, n=46, and the late mature Hungarian Giant, n=48) rabbit breeds, which were fed in two intensity (ad libitum and 30% restricted). The following growth parameters were calculated: body weight, body traits, body composition. The body weight gains (absolute, relative, cumulative, percentile and biological) and the body indexes were calculated from the body traits and the body weight. These parameters were evaluated by analysis of variance with General Linear model (main effects ANOVA). In the New Zealand White breed, a regression equation has been created using certain body measures and the indexes in order to estimate the tissue composition: DMFatNZW = 48.95 + 21.72 × W - 0.43 × l2 - 0.90 × l4-0.39 ×l7 (R=0.72; P < 0.001) and BMFatNZW = 1.83 + 7.46 × W- 0.22 × l2 - 0.15 × l4 (R=0.71; P < 0.001) where, DMFatNZW = fat content of the dry matter; BMFatNZW = fat content of the body mass; W = body weight at slaughtering; l2 = index of ear surface; l4 = index of fore cannon-body weight ratio; l7 = index of body weight-heart girth ratio.
|Number of pages||8|
|Journal||Magyar Allatorvosok Lapja|
|Publication status||Published - Dec 1 2005|
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