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Beef --- Beef --- Quality --- Quality --- meat hygiene --- meat hygiene --- quality labels --- quality labels --- economic environment --- economic environment --- Marketing --- Marketing --- Sales promotion --- Sales promotion --- Producer prices --- Producer prices --- Consumer prices --- Consumer prices --- Price formation --- Price formation --- Carcass composition --- Carcass composition --- Filiere --- Belgium --- Belgium --- Filiere

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Conventional husbandry systems for pork production are scrutinized by members of the general public as well as the scientific community. As a response, alternative forms of pig production, such as outdoor housing, organic farming and environmental enrichment are gaining interest. The question arises whether these production systems are indeed able to improve the welfare and health status of the animals, and whether these production systems alter production characteristics and meat or carcass traits. Measures of poor welfare have been described, but evaluating overall welfare is difficult. Certain parameters of alternative housing will improve welfare in some ways but, simultaneously, other welfare problems are inflated, and the weighting of each of these problems is very subjective. Alternative housing systems allow pigs to display species-specific behaviour and decrease the occurrence of abnormal behaviours by acting on several parameters: indoor versus outdoor housing, floor space/density, floor type, and provision of bedding or other types of environmental enrichment. Evaluating alternative housing systems should be done by looking at all the welfare-improving factors and the cost of alleviating welfare-decreasing problems in a given production system. Data in the literature on growth, meat and carcass traits in alternative production systems, are inconsistent, indicating that other factors can play an important role. However, as equal, or in some cases even better, performance can be attained in certain production systems that meet concerns of animal welfare scientists and members of the general public, alternative production forms may be considered preferable. (c) 2005 Society of Chemical Industry

2 genotypes. --- Abnormal behaviour. --- Alternative housing. --- Animal welfare. --- Animal-welfare. --- Animal. --- Animals. --- Bedding. --- Behaviour. --- Breeding. --- Carcass composition. --- Carcass quality. --- Carcass. --- Cost. --- Enrichment. --- Environmental enrichment. --- Farming. --- Fattening pigs. --- Floor. --- Growing-finishing pig. --- Growth-performance. --- Growth. --- Health. --- Housing system. --- Housing. --- Husbandry. --- Intramuscular fat-content. --- M.-longissimus-lumborum. --- Management. --- Meat quality. --- Meat. --- Muscle-fiber characteristics. --- Parameters. --- Performance. --- Pig. --- Pigs. --- Play. --- Production systems. --- Production. --- Provision. --- Quality. --- Response. --- Review. --- Space allowance. --- System. --- Systems. --- Time. --- Weighting. --- Welfare.