Multiple determinants of welfare in farmed fish:: stocking density, disturbance, and aggression in Atlantic salmon (Salmo salar)
Multiple determinants of welfare in farmed fish:: stocking density, disturbance, and aggression in Atlantic salmon (Salmo salar)
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DOI：
10.1139/f07-018
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发表时间：
2007-02-01
影响因子：
2.4
通讯作者：
Huntingford, F. A.
中科院分区：
文献类型：
--
作者：
Adams, C. E.;Turnbull, J. F.;Huntingford, F. A.
成年大西洋鲑鱼（萨尔莫salar）举行的海水坦克在放养密度为15，25和35公斤中心点m（-3）（5个重复）。51天后，四个措施的福利（身体状况，鳍条件，血糖和皮质醇）收集和组合的主成分分析成一个综合的福利得分为每一条鱼。在所有条件下都发现了具有高和低福利分数的鱼类，但总体福利在中等密度下最好，这支持了低密度和高密度都会损害鲑鱼福利的观点。放养密度的影响相互作用的干扰的影响更强，创造了一个复杂的模式之间的福利变化的实验坦克。与直觉相反，福利分数在具有高水平干扰的坦克中更高，而福利分数在最低密度下低得惊人。在所有坦克的侵略是低的，但上升后喂养，侵略时，干扰和放养密度呈负相关。这些数据突出了生产系统中鱼类福利的复杂决定因素，综合起来，表明大西洋鲑鱼的养殖实践和密度对福利的负面影响可能是由它们对社会互动的影响所介导的。
Adult Atlantic salmon (Salmo salar) were held in seawater tanks at stocking densities of 15, 25, and 35 kg center dot m(-3) (with five replicates). After 51 days, four measures of welfare (body condition, fin condition, plasma glucose, and cortisol) were collected and combined by principal components analysis into an integrated welfare score for each fish. Fish with high and low welfare scores were found in all conditions, but overall welfare was best at the intermediate density, supporting the view that low densities as well as high densities can compromise welfare in salmon. The effect of stocking density interacted with the stronger effect of disturbance, creating a complex pattern of variation in welfare among the experimental tanks. Counter-intuitively, welfare scores were higher in tanks with a high level of disturbance, while welfare scores were strikingly low at the lowest density. Aggression in all tanks was low, but rose after feeding, when aggression was negatively related to both disturbance and stocking density. These data highlight the complex determinants of welfare in fish in production systems and, taken together, suggest that negative effects of husbandry practice and density on welfare in Atlantic salmon might be mediated by their influence on social interactions.