Homing ability of adult cardinalfish is affected by elevated carbon dioxide
Homing ability of adult cardinalfish is affected by elevated carbon dioxide
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DOI：
10.1007/s00442-011-2081-2
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发表时间：
2012-01-01
期刊：
影响因子：
2.7
通讯作者：
Jones, Geoffrey P.
中科院分区：
文献类型：
--
作者：
Devine, Brynn M.;Munday, Philip L.;Jones, Geoffrey P.
据预测，到本世纪末，海洋中二氧化碳（CO2）的含量会损害幼鱼的嗅觉辨别能力。然而，这种破坏是否延伸到成年鱼类的嗅觉介导的行为是未知的。在许多鱼类中，成年鱼的生存和繁殖可能严重依赖于导航到家庭网站。我们测试的影响，不久的将来的水平的CO2（550，700或950 ppm）的成年五线红雀，Cheilodipterus quinquelineatus，回家的能力，他们的昼夜休息的网站后，夜间喂养。暴露于CO2浓度升高的红雀表现出受损的能力，区分气味的家庭与外国网站同种在成对的选择实验。位移实验表明，鱼从所有的CO2治疗显示出减少22-31%的归巢成功与控制鱼相比，在200米从家庭网站发布。虽然CO2暴露的红雀直接释放回家庭网站表现出类似的网站保真度控制科目，在家庭网站的行为受到影响，与CO2暴露的鱼表现出增加的活动水平和冒险进一步从住房。这项研究表明，由于海洋中二氧化碳水平的上升，鱼类化学感受机制的潜在破坏延伸到关键的成年行为。
The levels of carbon dioxide (CO2) predicted for the oceans by the end of this century have recently been shown to impair olfactory discrimination in larval fishes. However, whether this disruption extends to olfactory-mediated behaviour in adult fishes is unknown. In many fishes, adult survival and reproduction can be critically dependent upon navigation to home sites. We tested the effects that near-future levels of CO2 (550, 700 or 950 ppm) have on the ability of adult five-lined cardinalfish, Cheilodipterus quinquelineatus, to home to their diurnal resting sites after nocturnal feeding. Cardinalfish exposed to elevated CO2 exhibited impaired ability to distinguish between odours of home- versus foreign-site conspecifics in pair-wise choice experiments. A displacement experiment demonstrated that fish from all CO2 treatments displayed a 22-31% reduction in homing success compared with control fish when released at 200 m from home sites. While CO2-exposed cardinalfish released directly back onto home sites exhibited similar site fidelity to control subjects, behaviour at home sites was affected, with CO2-exposed fish exhibiting increased activity levels and venturing further from shelter. This study demonstrates that the potential disruption of chemosensory mechanisms in fishes due to rising CO2 levels in the ocean extend to critical adult behaviours.