Combined effects of natural and anthropogenic stressors in fish

自然和人为应激源对鱼类的综合影响

• 批准号: RGPIN-2017-05919
• 负责人: Couture, Patrice
• 金额: $ 2.33万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=630616
• 关键词: Combined; effects; natural; anthropogenic; stressors

Fish are exposed to a variety of stressors in their environment. Like other ectotherms, their internal temperature reflects environmental temperature and hence fluctuates seasonally. Fish are also exposed to contaminants released by industry, cities and agriculture. Metals are a peculiar type of contaminants, because they are also naturally present in the environment and several of them, like iron or copper, are essential for life. However, other metals like cadmium are non-essential, and all metals, essential or not, become toxic at high concentrations. This research program aims at examining the combined effects of variations in temperature and metal exposure on fish condition and health. We will investigate whether the stress induced by elevated temperatures increases their sensitivity to metal contamination, and vice-versa. The program also investigates the limits of tolerance to these stressors for several species of Canadian freshwater fish.

鱼暴露在环境中的各种压力源之下。与其他外温性动物一样，它们的体内温度反映了环境温度，因此会有季节性波动。鱼类也暴露在工业、城市和农业排放的污染物中。金属是一种特殊的污染物，因为它们也自然存在于环境中，其中几种污染物，如铁或铜，是生命所必需的。然而，像镉这样的其他金属是非必需的，所有的金属，无论是不是必需的，在高浓度下都会变得有毒。这项研究计划旨在研究温度变化和金属暴露对鱼类状况和健康的综合影响。我们将研究高温引起的应力是否会增加它们对金属污染的敏感性，反之亦然。该计划还调查了几种加拿大淡水鱼对这些应激源的耐受极限。