02272naa a2200337 a 450000100080000000500110000800800410001902400450006010000200010524502060012526000090033152012070034065000220154765000110156965000220158065300200160265300210162265300260164365300200166965300230168965300190171265300210173165300170175270000250176970000180179470000190181270000220183170000180185370000180187177300450188921399932022-02-14       2022    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.3390/ani120303312DOI1 aLOMBARDI, M. C.  aEvaluation of ingestive behavior, ruminal and blood parameters, performance, and thermography as a phenotypic divergence markers of residual feed intake in rearing dairy heifers.h[electronic resource]  c2022  aThe objectives of this study were: (1) to identify and rank phenotypically divergent animals for residual feed intake (RFI) regarding their efficiency (high: HE or low: LE); (2) to evaluate their relationships with ingestive behavior, ruminal and blood parameters, performance, and infrared thermography; and (3) to determine if such measurements can be used as feed efficiency markers in rearing dairy heifers. Thirty-eight heifers, 143 d ± 4 (Mean ± SD) of age and 108.7 kg ± 17.9 of body weight were used. The animals were fed with a total mixed ration during the 91 d of the trial. A phenotypic divergence of DMI for RFI was observed between ?0.358 and 0.337 kg/d for HE and LE, respectively. Dry matter intake (DMI) was lower in the HE (2.5 kg DMI/d vs. 3.1 kg DMI/d), as was the number of visits to the feed bin with consumption (59 vs. 71). Feed intake was the best predictor of said divergence. Water intake and number of visits to the feed bin were presented moderate correlations with RFI. The ruminal fermentation variables, blood metabolites, blood hormones (such as the other ingestive behavior variables), and infrared thermography were not able to accurately predict HE or LE animals.  aAnimal production  aBovino  aProdução Animal  aBase biológica  aBiological basis  aEficiência alimentar  aFeed efficiency  aIngestão de água  aSustainability  aSustentabilidade  aWater intake1 aDINIZ NETO, H. do C.1 aCOELHO, S. G.1 aMACHADO, F. S.1 aPEREIRA, L. G. R.1 aTOMICH, T. R.1 aCAMPOS, M. M.  tAnimalsgv. 12, n. 3, article 331, 2022.