Resumo

CAMACHO-ESCOBAR, M.A.  e  SUAREZ-OPORTA, M.E.. Poultry's embrionary heart development in relation whit cooling and altitude. Arch. zootec. [online]. 2011, vol.60, n.229, pp.105-112. ISSN 1885-4494.  https://dx.doi.org/10.4321/S0004-05922011000100012.

The relationship between cool and altitude during incubation in embrionary heart development was studied. Chicks' eggs were hatched at 2250 m altitude, in three treatments: no cooled (NE), cooled at room temperature for 6 or 12 h in 10, 12, 14,16, and 18 incubation day (E6 and E12), there were compared with embryos hatched in commercial conditions at 900 m (COM). The 19 hatch day 24 embryos were culled for each treatment to determine heart demage by cool and hypoxia. The results showed no differences in embryo weight, the adjusted heart weight was mayor in COM treatment (p<0.01); heart length and width were affected (p<0.01) by the cool and showed directly relation with the cooling time. The correlations between variables were high; the cool time extended the hatch time. The cool and incubation altitude affected the heart development, maybe by the hypoxic conditions in the embryos studied during the hatch.

Palavras-chave : Compensatory growth; Embrionary development; Heat stress; Heart hypertrophy; Hypoxic.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )