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Heritability estimates for feed efficiency-related traits are moderate in dairy and beef cattle [ 4- 7], including the Nelore breed [ 8]; however, genetic variation for feed efficiency has not been widely exploited in animal breeding programs because the measurement of this trait is costly [ 1].
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Mean fish weight and mortality rates in the restricted hatchery treatment were used as an estimate for feed measurements in the restricted semi-natural treatment.
Initial cost estimates for supplement feed showed that it will add 2 3 % to juvenile oyster production costs during the nursery phase when oysters are 0.5 3 mm in size (McCausland et al. 1999).
Unfortunately, neither of the two earlier meta-analyses presented estimates for breast-feeding in the first 2 weeks of life to allow comparison with our results.
Model 2 shows that there is some attenuation of the estimate for breast feeding after controlling for cognitive test scores suggesting that the effect of breast feeding effect may operate through neurological development.
For the first time since the start of the current marketing season, the FAO forecast for world coarse grains stocks has been raised, mostly to take account of higher production estimates for 2005 and lower feed use.
The VWC for feed was estimated as {text{VWC}}_{text{feed}} = ({text{CW}} times {text{SA}} + {text{WFM}}), (4 where CW = total VWC of feed crops per animal (m3/year), SA = slaughtering age (year), and WFM = volume of water for mixing of food items (m3/animal).
The crop residue feed quantities were estimated by applying crop-specific regional percentages of residues collected for feed [40] to the crop- and country-specific estimates of annual residue production.
National estimates for the initiation of breast-feeding have increased steadily since 1990, but duration has not gone up.
Studies in broilers have also shown that selection for FCR has a negligible impact on feed intake and a zero genetic correlation was estimated between feed intake and FCR in lines selected for feed efficiency [ 12].
Moreover, when MY was corrected for feed intake in the previous 2 days, estimated sire variation decreased to zero.
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