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The Influence of Personality on Small Fish Migration and Dispersal in the Everglades

机译：人格对大沼泽地小鱼迁移和扩散的影响

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摘要

The Everglades is characterized by seasonal hydrologic variation that expands and reduces aquatic habitats. Fish like Eastern Mosquitofish (Gambusia holbrooki), Bluefin Killifish (Lucania goodei), Golden Topminnow (Fundulus chrysotus) and Sailfin Molly (Poecilia latipinna) annually move to and from temporary wetlands. Field studies have indicated cyclic changes in activity and directionality for some fishes moving across the landscape and that rates vary among species. Laboratory experiments were performed to test the hypotheses that personality traits related to migration, including boldness, exploration and activity vary among fishes from locations with different hydrology and during periods of differing hydrology. Strong dispersers like Eastern Mosquitofish and Golden Topminnow were bolder when water levels were changing and were superior, as explorers of unknown environments, to species whose populations take longer to recover in seasonal wetlands. Poorer dispersers like Bluefin Killifish and Sailfin Molly lacked variation in personality traits related to seasonal dispersal. The results confirm prior studies showing seasonally changing activity levels by migrating fishes and demonstrate that seasonal personality changes are partially responsible. Understanding how and why fish move into and out of temporary wetlands is critical to the management of short-hydroperiod water levels to maintain an accessible food supply for wading birds.
机译：大沼泽地的特点是季节性的水文变化，扩大并减少了水生生境。每年，诸如东方蚊子（Gambusia holbrooki），蓝鳍K鱼（Lucania goodei），金顶min鱼（Fundulus chrysotus）和Sailfin Molly（Poecilia latipinna）之类的鱼类都会往返临时湿地。田间研究表明，某些鱼类在整个景观中移动时，其活动和方向性会发生周期性变化，而且物种间的变化率也不同。进行了实验室实验，以检验以下假设：与迁移有关的人格特征（包括大胆，探索和活动）在水文位置不同和水文时期不同的鱼类之间会有所不同。当水位变化时，像东部蚊子和金顶敏诺这样的强力扩散器会更大胆，并且作为未知环境的探索者，它们的种群在季节性湿地中需要更长的时间才能恢复。较差的分散剂，例如蓝鳍金枪鱼和赛芬·莫莉，缺乏与季节性分散有关的人格特质的变异。结果证实了先前的研究表明通过移徙鱼类季节性变化的活动水平，并表明季节性人格变化是部分原因。了解鱼类如何以及为什么进入和进入临时湿地对于管理短期水周期水位至关重要，以维持涉禽的可得食物供应。

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  • 来源
    《Wetlands》 |2019年第5期|991-1002|共12页
  • 作者

  • 作者单位

    Nova Southeastern Univ Dept Marine & Environm Sci 3301 Coll Ave Ft Lauderdale FL 33315 USA;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Latency time; Personality; Everglades; Dispersal; Migration; Boldness;

    机译：延迟时间;个性;大沼泽地分散;移民;大胆;

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