Effect of storage period and egg weight on embryo development and incubation results
AUTOR(ES)
Schmidt, GS, Figueiredo, EAP, Saatkamp, MG, Bomm, ER
FONTE
Revista Brasileira de Ciência Avícola
DATA DE PUBLICAÇÃO
2009-03
RESUMO
A total number of 300 females and 30 males of two experimental broiler lines, TT (male) and PP (female), with 39 and 36 weeks of age, respectively. Experiment 1 (TT) evaluated the effect of storage time (ST) on hatchability and embryo mortality (EM). Eggs were stored for 2 (ST1), 4 (ST2), 6 (ST3), 8 (ST4), 10 (ST5), 12 (ST6), and 24 (ST7) days and EM was assessed in the periods of 0 to 6 (EM1), 7 a 13 (EM2), 14 to 17 (EM3), 18 to 21 (EM4), and 0 to 21 (TEM) days. Experiment 2 (PP) evaluated the effect of egg weight (EW) on embryo development. Eggs were individually collected and weighed. Embryos were collected and weighed on days 9 (EW9), 11 (EW11), 13 (EW13), EW15, 17 (EW17) days of incubation and at hatching (EW21). ST linearly influenced hatchability and EM, with an estimated 1.17% reduction and a 1.15% increase, respectively for each 1.0 day of storage. Hatchability was reduced in 21% betweeb ST2 and ST7, resulting from a 462% increase in EM. The correlation between egg weight and embryo weight (EW) was significant after EW3 (0.25), reaching 0.72 for EW21, which corresponded to 70.92% of egg weight. The estimated increase in embryo weight for each 1.0g increase in egg weight was 0.71g for EW21.
Documentos Relacionados
- Influence of egg pre-storage heating period and storage length on incubation results
- Effect of egg storage length on hatchability and weight loss in incubation of egg and meat type Japanese quails
- Effect of temperature on incubation period, embryonic mortality, hatch rate, egg water loss and partridge chick weight (Rhynchotus rufescens)
- Influence of egg pre-storage heating period and storage length on the digestive tract of newly-hatched broiler chicks
- Effect of incubation conditions on anaerobic susceptibility testing results.