The Growth Pattern of Brazilian Canela-Preta Chickens with Different Plumages Reared in Two Rearing Systems

Growth pattern is essential for economically efficient poultry production. In this study, we aimed to describe the growth curve of chickens of the Canela-Preta breed reared in two different rearing systems, considering their different plumage colors. Initially, 204 one-day-old male and female chicks were randomly distributed in confinement and semi-confinement (102 animals in each system) without separation by gender. The animals were individually identified by wing and foot plastic brands and were weighted every seven days. The body weight and age records were used to estimate the growth curves of the following factors using the Richards model: plumage color, gender, and rearing system. The likelihood ratio test was used to verify the equality of parameters and identify nonlinear models to compare the growth patterns of the evaluated groups. The growth pattern of Canela-Preta chickens changed as a function of gender, plumage color, and rearing system. Females with black plumage, black and gold hens, and males with black and white plumage showed greater sensitivity to changes in rearing systems. Within-breed selection strategies for specific colors can improve the use of growth pattern differences, improving production efficiency. Semi-confinement is suitable for rearing Canela-Preta chickens with any plumage color, as these animals meet the free-range poultry niche market requirements.(AU)

Morphological description and functions of feathers to support Otus angelinae activitiesˆien

Otus angelinae is an owl that known for their silent flight, capable of flying just inches from their prey without being detected. The quietness of their flight is owed to their special feathers. This study aimed to describe the morphology and function of feathers of Otus angelinae. Two Otus angelinae aged 4 months taken from the wild forest of East Java. Owl were sedated with chloroform, dissected, and then observed to know the morphological of feathers that coat its body. The results showed that each part of the body of an owl composed of different morphology and size of feathers to support the activity of flying.(AU)

Morphological description and functions of feathers to support Otus angelinae activitiesˆien

Otus angelinae is an owl that known for their silent flight, capable of flying just inches from their prey without being detected. The quietness of their flight is owed to their special feathers. This study aimed to describe the morphology and function of feathers of Otus angelinae. Two Otus angelinae aged 4 months taken from the wild forest of East Java. Owl were sedated with chloroform, dissected, and then observed to know the morphological of feathers that coat its body. The results showed that each part of the body of an owl composed of different morphology and size of feathers to support the activity of flying.

An ex situ study on body characteristics and effect of plumage coloron body weight of indigenous chicken (Gallus domesticus) inBangladesh / Investigação ex situ sobre as características do corpo e os efeitos da cor das penas no peso corporal de frangos indígenas (Gallus domesticus) em Bangladesh

The study was conducted at the Bangladesh Livestock Research Institute (BLRI), Savar,Dhaka, Bangladesh with the objectives of comparing the body characteristics and body weight of three Indigenous chicken genotypes namely Common Desi, Hilly and Naked Neck. Of the four hundred and eighty nine birds analyzed the proportion of Common Desi, Naked Neck and Hilly chicken were 49.49,24.95 and 25.56% respectively. The most predominant plumage color was reddish black (33.13%). Four types of shank colors were most frequently observed, i.e. white (39.87%), yellow (37.22%), black (20.04%)and mixed (2.87%). The earlobes were mainly reddish white (44.79%) followed by white (29.24%) and red(25.97%). The most predominant skin color was white (92.22%). Most birds had a single comb (96.12%).Hilly birds were heavier than the other Indigenous chicken groups (p 0.05) but significantly differed from thatof Hilly chicken. In terms of shank length and circumference, there were no significant (p > 0.05)differences between Common Desi and Naked Neck chicken, but Hilly chicken had significant (p < 0.05)differences from both.

O estudo foi conduzido no Instituto de Pesquisa Animal (BLRI) em Savar, Dhaka,Bangladesh, para comparar as características corporais e o peso corporal de três genótipos de frangos indígenas, Common Desi, Hilly e Naked Neck. A proporção dos genótipos Common Desi, Naked Neck e Hilly foi respectivamente 49,49, 24,95 e 25,56% num total de 489 aves analisadas. A cor predominante das penas foi preto avermelhado com 33.13%. Foram observados os quarto tipos de cores mais frequentes das pernas: branca (39,87%), amarela (37,22%), preta (20,04%) e mista (2,87%). A cor das orelhas era geralmente branca avermelhada (44,79%), seguida por branca (29,24%) e vermelha (25,97%). A cor da pele mais predominante era branca (92,22%). A maioria das aves tinha uma só cresta (96,12%). As aves Hillyeram mais pesadas do que os outros grupos de aves indígenas (p 0,05), mas havia diferença significativa do peso das aves Hilly. Em termos de cumprimento de perna e circunferência, não havia diferença significativa (p > 0,05) entre Common Desi e Naked Neck, embora as aves Hilly diferissem significativamente (p < 0,05) dos outros dois.

An ex situ study on body characteristics and effect of plumage coloron body weight of indigenous chicken (Gallus domesticus) inBangladesh / Investigação ex situ sobre as características do corpo e os efeitos da cor das penas no peso corporal de frangos indígenas (Gallus domesticus) em Bangladesh

The study was conducted at the Bangladesh Livestock Research Institute (BLRI), Savar,Dhaka, Bangladesh with the objectives of comparing the body characteristics and body weight of three Indigenous chicken genotypes namely Common Desi, Hilly and Naked Neck. Of the four hundred and eighty nine birds analyzed the proportion of Common Desi, Naked Neck and Hilly chicken were 49.49,24.95 and 25.56% respectively. The most predominant plumage color was reddish black (33.13%). Four types of shank colors were most frequently observed, i.e. white (39.87%), yellow (37.22%), black (20.04%)and mixed (2.87%). The earlobes were mainly reddish white (44.79%) followed by white (29.24%) and red(25.97%). The most predominant skin color was white (92.22%). Most birds had a single comb (96.12%).Hilly birds were heavier than the other Indigenous chicken groups (p < 0.05). The mature weight between Common Desi and Naked Neck did not differ significantly (p > 0.05) but significantly differed from thatof Hilly chicken. In terms of shank length and circumference, there were no significant (p > 0.05)differences between Common Desi and Naked Neck chicken, but Hilly chicken had significant (p < 0.05)differences from both.(AU)

O estudo foi conduzido no Instituto de Pesquisa Animal (BLRI) em Savar, Dhaka,Bangladesh, para comparar as características corporais e o peso corporal de três genótipos de frangos indígenas, Common Desi, Hilly e Naked Neck. A proporção dos genótipos Common Desi, Naked Neck e Hilly foi respectivamente 49,49, 24,95 e 25,56% num total de 489 aves analisadas. A cor predominante das penas foi preto avermelhado com 33.13%. Foram observados os quarto tipos de cores mais frequentes das pernas: branca (39,87%), amarela (37,22%), preta (20,04%) e mista (2,87%). A cor das orelhas era geralmente branca avermelhada (44,79%), seguida por branca (29,24%) e vermelha (25,97%). A cor da pele mais predominante era branca (92,22%). A maioria das aves tinha uma só cresta (96,12%). As aves Hillyeram mais pesadas do que os outros grupos de aves indígenas (p < 0,05). Não havia diferença significativa entre o peso maduro entre as aves Common Desi e Naked Neck (p > 0,05), mas havia diferença significativa do peso das aves Hilly. Em termos de cumprimento de perna e circunferência, não havia diferença significativa (p > 0,05) entre Common Desi e Naked Neck, embora as aves Hilly diferissem significativamente (p < 0,05) dos outros dois.(AU)