Thunderstorms have species and gear‐specific indirect effects on the catchability of Mongolian salmonids

Thunderstorms have species and gear‐specific indirect effects on the catchability of Mongolian salmonids
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雷暴对物种和渔具有特定的间接影响,对蒙古鲑科鱼的捕获能力有特定的间接影响

DOI:
10.1111/fme.12490
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发表时间:
2021
影响因子:
2
通讯作者:
Jensen, Olaf P.
Jensen, Olaf P.
中科院分区:
农林科学3区
文献类型:
--
作者:
Golden, Abigail S.;Sivaram, Sneha;Batsaikhan, Ganzorig;Jensen, Olaf P.

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据预测,气候变化将导致越来越频繁和强烈的风暴。蒙古北方的变暖速度已经是全球平均水平的两倍,雷暴,定义为与雷声,闪电和高降水率相关的强烈,短暂,片状的降雨,正变得越来越频繁。由于蒙古的鱼类种群开发程度较低,蒙古提供了一个研究风暴对鱼类行为和捕捞脆弱性影响的模式系统。评估了雷暴相关的水文变化对鱼类对两种渔具脆弱性的影响。两个雷暴相关的因素,浊度和河流阶段,减少鲑鱼lenokBrachymystax细鳞鱼(帕拉斯)和贝加尔湖graylingThymallus baicalensisDybowski的捕捞率。在这种渔业中,飞钓渔具比旋转渔具更有效,在极端条件下保持了更高的渔获量。这些特定渔具的影响表明,浑浊度和河流水位上升通过影响摄食行为而影响捕捞脆弱性。
Climate change is predicted to cause increasingly frequent and intense storms. Northern Mongolia is already warming at a rate twice the global average, and thunderstorms, defined as intense, short, patchy rains associated with thunder, lightning and high precipitation rates, are becoming more frequent. Because Mongolia's fish populations are lightly exploited, Mongolia provides a model system in which to study the effects of storms on fish behaviour and fishing vulnerability. The impacts of thunderstorm‐related hydrological changes on fishes’ vulnerability to two fishing gears were evaluated. Two thunderstorm‐related factors, turbidity and river stage, reduced catch rates of the salmonids lenokBrachymystax lenok(Pallas) and Baikal graylingThymallus baicalensisDybowski. Fly‐fishing gear was more effective than spinning gear in this fishery and retained higher catch rates in extreme conditions. These gear‐specific effects suggest that turbidity and rising river stage affect fishing vulnerability by influencing feeding behaviour.
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