Effects of genotype and feed restriction on the time-budgets of broiler breeders at different ages

Puterflam, Julie; Merlet, François; Faure, Jean Michel; Hocking, Paul; Picard, Michel

doi:10.1016/j.applanim.2005.08.013

Cited by 10 publications

(11 citation statements)

References 22 publications

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“…Since broiler breeders have similar genetics to broilers, who have been selected for fast growth and high feed efficiency, all broiler breeders experience some level of feed restriction (Siegel and Wolford, 2003 ). This feed restriction is most severe during the rearing period, and more severe for the very fast‐growing hybrids than for the more slowly growing hybrids (Puterflam et al., 2006 ; Arrazola and Torrey, 2021 ). The intention is to reduce health and welfare issues linked with lameness due to overweight, at ages beyond that when a normal broiler chicken would already have been slaughtered.…”

Section: Assessmentmentioning

confidence: 99%

“…In addition to improving broiler' welfare, broiler breeders benefit from a genotype for slower daily weight gain. The necessary feed restriction especially during rearing is more severe and of longer duration for fast‐growing than for slower‐growing hybrids (Puterflam et al., 2006 ; Arrazola and Torrey, 2021 ). This leads to higher stress levels and welfare problems in broiler breeders of fast‐growing compared with slower‐growing hybrids (Arrazola and Torrey, 2021 ).…”

Section: Assessmentmentioning

confidence: 99%

See 1 more Smart Citation

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%

Section: Assessmentmentioning

confidence: 99%

Welfare of broilers on farm

Nielsen¹,

Álvarez²,

Bicout³

et al. 2023

EFS2

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“…Des études, réalisées sur des petits groupes, ont démontré que les reproducteurs rationnés (quantitativement) sont plus actifs (exploration litière, consommation eau) et présentent une plus grande attractivité pour l'aliment (Savory et Maros 1993, Puterflam et al 2006. Ces observations soulignent les conséquences du rationnement sur le bien-être animal (frustration, notion de faim…).…”

Section: / Quelles Voies Nutritionnelles Envisagées Pour Améliorer Leunclassified

Alimentation, fertilité et bien-être des oiseaux reproducteurs domestiques : des liens complexes

Brière¹,

Brillard²,

Panheleux

et al. 2011

INRA Prod. Anim.

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Chez les oiseaux, comme toutes autres espèces, la nutrition et plus particulièrement le métabolisme énergétique influence la fonction de reproduction. Les modèles d’oiseaux hyperphagiques ont permis de montrer l’effet négatif dans les deux sexes d’une suralimentation, alors qu’une restriction alimentaire pendant leur croissance augmente les taux de ponte et la durée de la période fertile. Cependant les mécanismes qui sous-tendent les relations entre la nutrition, le métabolisme énergétique et la fonction de reproduction sont mal connus. Ces changements du statut nutritionnel et métabolique peuvent être transmis à l’axe de la reproduction (hypothalamus, hypophyse et gonades) aussi bien par les modifications des concentrations hormonales en insuline, adipocytokines, etc., que par celles des substrats énergétiques eux mêmes : glucose, acides gras et acides aminés. Nous rappellerons brièvement ici les effets des différents composants présents dans l’alimentation et les conséquences sur la reproduction. Les propositions d’utiliser un rationnement qualitatif seront également abordées : existe-t-il des méthodes alternatives impliquant une restriction qualitative plutôt que quantitative.

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“…Since the 1990s, research has shown that feed restriction levels cause hunger and this practice is a welfare issue ( Hocking et al., 2002 ; Mench, 2002 ; van Krimpen and de Jong, 2014 ). Several studies have shown that feed-restricted broiler breeders show behaviors indicative of frustration (increase in activity level and decrease time spent for resting, eating, and comfort behavior); more foraging behavior; pacing; stereotypic object pecking; polydipsia; and hyperactivity ( Hocking et al., 2001 , 2002 ; de Jong et al., 2003 ; Puterflam et al., 2006 ; Nielsen et al., 2011 ; Riber et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%