Coarse woody habitat does not predict largemouth bass young of year mortality during the open-water season

Coarse woody habitat does not predict largemouth bass young of year mortality during the open-water season
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粗木本栖息地并不能预测开放水域季节大口黑鲈幼鱼的死亡率

DOI:
10.1139/cjfas-2018-0050
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发表时间:
2019
影响因子:
2.4
通讯作者:
Solomon, Christopher T.
Solomon, Christopher T.
中科院分区:
农林科学2区
文献类型:
--
作者:
Ziegler, Jacob P.;Dassow, Colin J.;Jones, Stuart E.;Ross, Alexander J.;Solomon, Christopher T.

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沿岸的结构通常被认为是提供庇护所年轻的一年(YOY)淡水鱼类,但这种关系的经验性原位测试是缺乏的。我们估计死亡率的YOY大口鲈鱼(Micropterus salmoides)在开放水域的季节在北方威斯康星州和密歇根州的13个湖泊使用重复的通气管调查。我们的目标是检验这一假设,即死亡率是负相关的丰富的沿岸的粗糙的木本栖息地,范围从3至1500件木材每公里的海岸线在这些湖泊。瞬时死亡率受到很好的约束,在13个湖泊中的范围从0.04到0.19。死亡率是不相关的粗木质栖息地丰富。我们的研究结果表明,粗糙的木本栖息地和YOY死亡率之间的关系可能不像通常假设的那样强或普遍。
Littoral structure is often assumed to provide refuge to young of year (YOY) freshwater fish species, but empirical in situ tests of this relationship are lacking. We estimated mortality rates of YOY largemouth bass (Micropterus salmoides) over the open-water season in 13 lakes in northern Wisconsin and Michigan using repeated snorkel surveys. Our goal was to test the hypothesis that mortality rate is negatively related to the abundance of littoral coarse woody habitat, which ranged from 3 to 1500 pieces of wood per kilometre of shoreline in these lakes. Instantaneous mortality rates were well-constrained and ranged from 0.04 to 0.19 among the 13 lakes. Mortality was not related to coarse woody habitat abundance. Our results suggest that the relationship between coarse woody habitat and YOY mortality might not be as strong or universal as is often assumed.
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