Performance of free-range chickens reared in production modules enriched with shade net and perches

Santos, Marcos José Batista dos; Pandorfi, Héliton; Rabello, Carlos Bôa-Viagem; Silva, Edney Pereira da; Torres, Thaysa Rodrigues; Santos, P. A. dos; Morril, Waldirene B.; Duarte, Nádia Maria da Conceição

doi:10.1590/s1516-635x2014000100003

Cited by 11 publications

(5 citation statements)

References 11 publications

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“…This is most easily provided by active ventilation, but passive ventilation on the four sides of the house and especially the ridge or other high positions may also ensure good ventilation in mobile housing that are of small size. Shelter in the outdoor range (preferably natural shelter such as trees) is also essential to prevent heat stress in systems with outdoor range (Santos et al., 2014 ). Reducing stocking density through thinning and providing elevated structures will help to prevent heat stress.…”

Section: Assessmentmentioning

confidence: 99%

Welfare of broilers on farm

Nielsen¹,

Álvarez²,

Bicout³

et al. 2023

EFS2

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This Scientific Opinion considers the welfare of domestic fowl (Gallus gallus) related to the production of meat (broilers) and includes the keeping of day-old chicks, broiler breeders, and broiler chickens. Currently used husbandry systems in the EU are described. Overall, 19 highly relevant welfare consequences (WCs) were identified based on severity, duration and frequency of occurrence: 'bone lesions', 'cold stress', 'gastro-enteric disorders', 'group stress', 'handling stress', 'heat stress', 'isolation stress', 'inability to perform comfort behaviour', 'inability to perform exploratory or foraging behaviour', 'inability to avoid unwanted sexual behaviour', 'locomotory disorders', 'prolonged hunger', 'prolonged thirst', 'predation stress', 'restriction of movement', 'resting problems', 'sensory under-and overstimulation', 'soft tissue and integument damage' and 'umbilical disorders'. These WCs and their animal-based measures (ABMs) that can identify them are described in detail. A variety of hazards related to the different husbandry systems were identified as well as ABMs for assessing the different WCs. Measures to prevent or correct the hazards and/or mitigate each of the WCs are listed. Recommendations are provided on quantitative or qualitative criteria to answer specific questions on the welfare of broilers and related to genetic selection, temperature, feed and water restriction, use of cages, light, air quality and mutilations in breeders such as beak trimming, de-toeing and comb dubbing. In addition, minimal requirements (e.g. stocking density, group size, nests, provision of litter, perches and platforms, drinkers and feeders, of covered veranda and outdoor range) for an enclosure for keeping broiler chickens (fast-growing, slower-growing and broiler breeders) are recommended. Finally, 'total mortality', 'wounds', 'carcass condemnation' and 'footpad dermatitis' are proposed as indicators for monitoring at slaughter the welfare of broilers on-farm.

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Section: Assessmentmentioning

confidence: 99%

Welfare of broilers on farm

Nielsen¹,

Álvarez²,

Bicout³

et al. 2023

EFS2

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“…Encouraging range use by providing diverse stimuli [50] may elicit foraging through activities like pecking, scratching, tearing, biting and harvesting of seeds [24,55,56]. This has implications for the design of outdoor access poultry systems, since tree cover as well as enrichment environment should be provided to stimulate ranging, increasing access to a diversity of plant species [57]. The use of wood shavings as litter, which was maintained by adding new wood shavings every week in this study, is likely to have been a source of enrichment [58].…”

Section: Effects On Behaviourmentioning

confidence: 99%

Effects of Outdoor Access and Indoor Stocking Density on Behaviour and Stress in Broilers in the Subhumid Tropics

Sánchez-Casanova

Sarmiento‐Franco

Segura-Correa

et al. 2019

Animals

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Studies investigating the welfare of commercial-line broiler chickens raised in houses with outdoor access in the tropics are scarce, and none have investigated whether responses vary according to indoor conditions. Hence, we assessed the effects of providing outdoor access at two indoor stocking densities on broiler chickens’ growth, behaviour, stress responses and immunity in a tropical region of Mexico. One hundred and sixty chickens were assigned to one of four treatments in a factorial design: with or without outdoor access and low or high stocking density indoors. Ad libitum sampling was used to build a purpose-designed ethogram. Scan sampling was used to record the number of birds engaged in each activity of this ethogram, both indoors and outdoors. Heterophil/lymphocyte (H/L) ratio and serum corticosterone levels were tested in weeks four and six of age. When the birds were 42 days old, they were slaughtered, and the bursa and spleen harvested and weighed. In an interaction between stocking density and outdoor access, birds at the high stocking density with no outdoor pens spent the least time walking and preening and more time lying (p < 0.05). Birds given outdoor access foraged more, but only at indoor low stocking densities (p < 0.05). Outdoor access reduced heterophil/lymphocyte ratio, indicating reduced stressor response. Birds with low stocking density indoors and outdoor access appeared more responsive to stressors, with elevated corticosterone and reduced spleen and bursa weights (p < 0.05). There were welfare benefits of outdoor access, principally in terms of increased activity, which were reflected in slower growth in the birds with outdoor access.

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“…No mercado consumidor, há crescente demanda por produtos alimentares provenientes de sistemas de produção que causam menos poluição ambiental (Santos et al, 2014). A investigação de novas tecnologias tem promovido, de forma significativa, o desenvolvimento da produtividade da indústria avícola.…”

Section: Introdução unclassified

Resíduo de acerola em dietas para codornas

Ferreira

Lana

et al. 2019

Arq. Bras. Med. Vet. Zootec.

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RESUMO Objetivou-se avaliar a inclusão do resíduo da acerola em dietas de codornas de corte sobre o desempenho produtivo, rendimento de carcaça, biometria intestinal e viabilidade econômica das aves, aos 42 dias de idade. Foram utilizadas 400 codornas europeias, não sexadas, de um dia de idade, distribuídas em delineamento experimental inteiramente ao acaso, com cinco níveis de inclusão (0,0; 3,0; 6,0; 9,0 e 12,0%) de resíduo da acerola, com oito repetições e 10 aves por unidade experimental. Não foram observadas diferenças significativas (P>0,05) para o ganho de peso, o consumo de ração, a conversão alimentar, os pesos absolutos e os rendimentos de carcaça e os cortes nobres (peito, coxa e sobrecoxa). Houve efeito (P<0,05) linear para os pesos absolutos e relativos de fígado e moela. A biometria intestinal das aves não foi (P>0,05) influenciada pelos níveis de inclusão do resíduo de acerola. O resíduo de acerola pode ser utilizado como ingrediente alternativo nas dietas de codornas europeias, até o nível de 12% de inclusão, sem comprometer o desempenho produtivo, o rendimento de carcaça das aves e a viabilidade econômica.

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Performance of free-range chickens reared in production modules enriched with shade net and perches

Cited by 11 publications

References 11 publications

Welfare of broilers on farm

Welfare of broilers on farm

Effects of Outdoor Access and Indoor Stocking Density on Behaviour and Stress in Broilers in the Subhumid Tropics

Resíduo de acerola em dietas para codornas

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