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The Role of Phototaxis in the Initial Swim Bladder Inflation of Larval Yellow Perch (Perca flavescens)

机译：趋光性在幼体黄鲈（Perca flavescens）的初始游泳膀胱膨胀中的作用

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摘要

The North Central Regional Aquaculture Center has designated the yellow perch (Perca flavescens) as a high priority species for culture. The demand for this species is high and it is estimated that the market could readily consume 50 to 100 million pounds per year. Tank culturing of yellow perch has several advantages over pond culture and this method has been growing in popularity, but is currently held back by problems in larval development. One of these problems, failed swim bladder inflation (SBI), is frequently reported in the literature as a bottleneck in the culture of many fishes. Unsuccessful SBI increases metabolic demands, inhibits prey capture, and increases a fish's overall probability of death. Initial SBI can occur within a finite period during ontogeny, and missing this opportunity results in permanent malformation of the organ. Advances in this problem have been made, but the challenge of increasing SBI success remains. The literature suggests that light cues appear to trigger the response of rising to the surface to gulp air and initially inflate. The yellow perch is photopositive in the larval phase and this phototactic response correlates with the window of opportunity for SBI to occur. The goal of this research was to examine the role that phototactic behavior plays in initial SBI in yellow perch. The results of this study reveal that low-intensity nighttime light reduces the proportion of perch larvae to initially inflate. It seems that the photopositive response does not contribute to SBI success, and in fact it can significantly hinder the process when light sources exist below the water's surface. This could potentially explain previous research where increased SBI is seen in tanks with less reflective internal surfaces, and suggests that nighttime lighting and below surface light should be reduced as much as possible to increase SBI success.
机译：北部中部区域水产养殖中心已将黄色鲈鱼（Perca flavescens）指定为养殖的高度优先物种。该物种的需求量很高，据估计，该市场每年可轻易消耗50至1亿磅。与鲈鱼养殖相比，黄鲈鱼的箱式养殖有很多优势，该方法已越来越流行，但目前由于幼体发育问题而受阻。这些问题之一是游泳膀胱充气失败（SBI），在文献中经常被报告为许多鱼类养殖的瓶颈。 SBI失败会增加新陈代谢的需求，抑制猎物的捕获，并增加鱼类的整体死亡概率。最初的SBI可能在个体发育期间的有限时间内发生，而错过这一机会会导致器官的永久性畸形。在此问题上已经取得了进步，但是增加SBI成功的挑战仍然存在。文献表明，光提示似乎触发了上升到地面的反应，吞入空气并开始膨胀。黄色鲈鱼在幼虫期是阳性的，这种光战术反应与SBI发生的机会窗口相关。这项研究的目的是检查在黄色鲈鱼中光战术行为在初始SBI中的作用。这项研究的结果表明，夜间低强度照明可减少鲈鱼幼虫开始膨胀的比例。看来，光阳性反应不会促进SBI成功，实际上，当光源位于水面以下时，它可能会严重阻碍该过程。这可能可以解释以前的研究，即在反射较少的内表面的储罐中看到SBI升高，并建议应尽可能减少夜间照明和地下光以提高SBI的成功率。

著录项

  • 作者

    Suchocki, Christopher Ryan.;

  • 作者单位

    The University of Wisconsin - Milwaukee.;

  • 授予单位 The University of Wisconsin - Milwaukee.;
  • 学科 Developmental biology.;Aquatic sciences.;Animal sciences.
  • 学位 M.S.
  • 年度 2017
  • 页码 69 p.
  • 总页数 69
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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