Egg traits and physiological neonatal chick parameters from broiler breeder at different ages

Abstract

This investigation was carried out to study egg traits (weight, specific gravity and eggshell thickness), and neonatal chick parameters (weight, blood, cardiac and lung parameters) from breeder at different ages. After hatching, neonatal chicks, male and female, from broiler breeder at three different ages (30, 45 and 60 weeks) were sacrificed and blood (red blood cell number, hematocrit, mean cell volume, blood viscosity, and haemoglobin), cardiac (right ventricle and total ventricle weights, cardiac index) and lung (mean pulmonary pressure, fresh relative lung weight) parameters were measured. No significant differences in eggshell thickness or specific gravity were observed in eggs from the three different breeder age. The incubated eggs and neonatal chicks showed heavier absolute weights with increasing breeder age. Broiler breeder age did not affect blood parameters or cardiac index, but affected right ventricle and total ventricle absolute weights. Red blood cell number and hematocrit were higher and lung weight and lung weight:chick weight index were lower for female neonatal chicks. The findings of this study revealed that breeder age affects neonatal chick parameters such as body weight, heart and lung absolute weights, but not blood parameters.

The influence of age on the exploitation period in broiler reproduction of parents in Ross hybrid 308

“…On the 24 th week, average mass of brood eggs was 51.29 g, of chicks 31.76 g and on the 61 st week (38 weeks of flock using), 67.22 or 44.48 g. Weekly observed absolute (S) and relative (CV) measures of variation were almost the same for average brood eggs mass and incubated chickens (exception of arithmetic point are relatively small), while the mistake of average value was on satisfactory level and was 600 (brood eggs); in other words, 500 (incubated chickens), considering especially that the number of repeating (size of sample) was big. Our findings on how the flock becomes older, the egg mass increases, as well as increase in the mass of incubated chickens, are also in agreement with the reports of other researchers (Luquetti et al 2004;Maiorka et al 2004;Barnett et al 2004;Sahin et al 2009). Luquetti et al (2004), at the heavy hybrid Cobb 500 parental flock which was 30 weeks old, identified that the average egg mass was 58.3 g and in the 60 th week 68.2 g, while the average chicken mass, two hours after incubating, was 42.2 g (30 th week) and 48.6 g (60 th week).…”

“…Furthermore, hen age also has influence on yolk share, egg white and egg shell in total egg mass (Fletcher et al, 1981;Akbar et al, 1983;Curtis et al, 1985;Butcher at al., 1991;Danilov, 2000;Luquetti et al, 2004), also on egg mass, chick's mass and relative share of chick mass in total egg mass (Luquetti et al, 2004).…”

Avaliação da qualidade da casca dos ovos provenientes de matrizes pesadas com diferentes idades

“…1 revelaram que os ovos das matrizes com idade de 63 semanas apresentaram menor peso específico (P<0,05) quando comparados aos ovos das matrizes de 33 semanas. Como a análise de peso específico é um indicador de qualidade do ovo, estes resultados demonstram uma melhor qualidade de casca nos ovos de matrizes mais novas, concordando com os resultados obtidos em trabalhos anteriores (McDaniel et al, 1979;Barbosa, 2005), com exceção de Luquetti et al (2004), que não encontraram diferenças de peso específico nos ovos provenientes de matrizes pesadas de 30, 45 e 60 semanas de idade.…”

“…De acordo com McDaniel et al (1979) e Hamilton (1982), o tamanho e o peso do ovo aumentam com a idade das aves, mas o peso da casca não aumenta na mesma proporção. Em consequência, à medida que a ave envelhece, a estrutura da casca sofre modificações que demonstram queda na qualidade dela.…”

Níveis crescentes de parede de levedura sobre a resposta imune celular e perfil hematológico de frangos de corte

“…Os órgãos linfóides têm seu desenvolvimento e posterior involução relacionados com o desenvolvimento corporal, que está relacionado com a idade das matrizes (Maiorka 2002, Maiorka et al 2003. Entretanto, para as variáveis hematológicas da série vermelha, Luquetti et al (2004) observaram que a idade das reprodutoras não refletiu diferenças na progênie.…”