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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Remote video methods for studying juvenile fish populations in challenging environments
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Remote video methods for studying juvenile fish populations in challenging environments

机译：在挑战环境中研究少年鱼群的远程视频方法

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摘要

Understanding the dynamics of juvenile fish populations is a key component to understanding variation in adult populations, however, juvenile fish are frequently found in a variety of structurally complex habitats which are often not easily sampled. The use of baited (BRUV) and unbaited (RUV) remote underwater stereo-video to study juvenile fish populations is uncommon and thus far, no study has directly compared the efficacy of these two methods solely for juvenile fish assemblages.The macro-tidal Kimberley region in the north-west of Australia is challenging to sample using diver-based methods due to the strong currents and prevalence of saltwater crocodiles (Crocodylus porosus). We sampled 60 Stereo-RUVs and 60 Stereo-BRUVs across four shallow-water (1-6 m) benthic habitats: coral, mangrove, macroalgae, and seagrass, to contrast the effect of the presence or absence of bait, deployment period, in-water visibility and tidally driven water speed on estimates of relative total abundance, species richness, and composition of the juvenile fish assemblage.No difference was detected in the ability of stereo-BRUV or stereo-RUV to quantify the relative total abundance, species richness, or assemblage composition of juvenile fish. We also found little effect of in-water visibility or tidally driven water speed, likely as a result of stratifying our sampling to slack water periods.We found that a deployment period of 10 min for Stereo-BRUVs and 15 min for Stereo-RUVs was optimum for sampling the juvenile fish assemblage across all four contrasting habitats. Since no statistical significance was observed between 10 and 15 min, we recommend that Stereo-RUVs deployed for 15 min during tidal slack water conditions are an optimum way to provide consistent results for comparisons of juvenile fish assemblage metrics across the benthic habitats studied within this region.The controlled video methodologies described here provided an opportunity to access un-sampled juvenile fish habitats and assemblages where traditional diver-based methodologies are impossible. Applying these methods broadly can help to improve our understanding of the status of juvenile fish and infer the reproductive success and viability of their populations across a range of habitat and environments.
机译：了解少年鱼群的动态是了解成人群体变异的关键组成部分，然而，在各种结构复杂的栖息地中经常发现少年鱼类，这些栖息地通常不容易采样。使用诱饵（BRUV）和未禁止的（RUV）远程水下立体声视频来研究少年鱼群罕见，到目前为止，没有研究直接比较了这两种方法的功效，仅针对少年鱼组合。宏观金伯利由于咸水鳄鱼（Crocodylus Porosus）的强大电流，澳大利亚西北地区采用基于潜水员的方法来对地区进行挑战。我们在四个浅水（1-6米）底栖栖息地的60个立体声Ruvs和60立体声Bruvs：珊瑚，红树林，宏观格子和海草，形成对比诱饵，部署期内的效果 - 水上可见性和各个少数丰富性丰富，物种丰富性和组成的估算估算。在立体声 - Bruv或立体声ruv量化相对总丰度，物种丰富度的能力中检测到No差异或少年鱼的组合组成。我们还发现水上可见性或整个水速度的影响很小，可能是由于我们的抽样来休闲水时期的结果。我们发现，对于立体声Bruvs的10分钟的部署期为10分钟，即立体声ruvs的15分钟在所有四个对比栖息地上采样少年鱼组合的最佳选择。由于在10到15分钟之间没有观察到统计学意义，我们建议在潮汐松弛水条件下部署15分钟的立体声ruv是一种最佳方式，可以提供一致的结果，以便在该地区学习的底栖栖息地的少年鱼类组合度量比较的一致结果。这里描述的受控视频方法提供了访问未采样的少年鱼栖息地和组装的机会，其中传统的潜水员的方法是不可能的。应用这些方法广泛地可以帮助改善我们对少年鱼的地位的理解，并推断出在一系列栖息地和环境中的群体的生殖成功和可行性。

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  • 来源
    《Journal of Experimental Marine Biology and Ecology》 |2020年第11期|151454.1-151454.11|共11页
  • 作者

    Piggott Camilla V. H.; Depczynski Martial; Gagliano Monica; Langlois Tim J.;

  • 作者单位

    Univ Western Australia UWA Oceans Inst M470 Crawley WA 6009 Australia|Univ Western Australia Sch Biol Sci M092 Crawley WA 6009 Australia|Univ Western Australia Indian Ocean Marine Res Ctr Australian Inst Marine Sci Crawley WA 6009 Australia|Cygnet Bay Pearl Farm Kimberley Marine Res Stn Kimberley WA 6725 Australia;

    Univ Western Australia UWA Oceans Inst M470 Crawley WA 6009 Australia|Univ Western Australia Sch Biol Sci M092 Crawley WA 6009 Australia|Univ Western Australia Indian Ocean Marine Res Ctr Australian Inst Marine Sci Crawley WA 6009 Australia;

    Univ Western Australia UWA Oceans Inst M470 Crawley WA 6009 Australia|Univ Western Australia Sch Biol Sci M092 Crawley WA 6009 Australia|Univ Sydney Sch Life & Environm Sci Biol Intelligence BI Lab Macleay Bldg Sydney NSW 2006 Australia|Univ Sunshine Coast Sch Sci & Engn Maroochydore Qld 4558 Australia|Univ Sunshine Coast Sch Creat Ind Maroochydore Qld 4558 Australia;

    Univ Western Australia UWA Oceans Inst M470 Crawley WA 6009 Australia|Univ Western Australia Sch Biol Sci M092 Crawley WA 6009 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Juvenile fish; Stereo-video; Deployment period; Visibility; Water speed; Macrotidal environment;

    机译：少年鱼;立体视频;部署期限;可见性;水速;麦田环境;

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