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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Appropriate set times to represent patterns of rocky reef fishes using baited video
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Appropriate set times to represent patterns of rocky reef fishes using baited video

机译：使用诱饵视频，适当的设置时间来代表礁石鱼的图案

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Baited Remote Underwater Video (BRUV) has become a popular technique to survey fish assemblages for a wide range of purposes. BRUV methodology has, however, also varied greatly for a range of reasons. A major dichotomy occurs, in particular, in the time used to sample the fish assemblages i.e. the BRUV set time. The aim of this study was to determine whether differences in set time were likely to affect the conclusions reached by studies using different set times, and what might be the most appropriate and cost-effective set time to use to sample temperate reef fish assemblages. In this study, we test whether there were significant differences between the two main set times used (i.e. 30 and 60 min) in BRUV sampling for assemblage patterns, species diversity, and relative abundance of rocky reef fishes. In particular, we sampled fished and unfished rocky reefs to assess whether the different set times would lead to differences in the patterns or the interpretation of the subsequent data. We sampled fish assemblages on six rocky reefs (20-35 m) across two marine parks on the east coast of Australia. At each location replicate BRUVs were deployed for 30 and 60 min in a 'no take' area (marine sanctuary) and a fished area. The interpretations of the data across the fished and unfished zones were consistent with both set times indicating that the conclusions from both set time were comparable. Furthermore, there were no differences in fish assemblages or species richness between the set times. The relative abundances of the recreationally and commercially important snapper (Chrysophrys auratus) were greater in the longer set times, but the actual spatial patterns between zones and amongst locations were consistent. Piecewise regression analysis of the breakpoint times for species accumulation found that there were no significant differences between locations or between fished and unfished areas. Mean breakpoint, the time when species accumulation changes, occurred at 12 min +/- 1.04 S.E. for all sites combined whilst the shorter set time was found to be less costly and require less field and laboratory times. This study quantifies that either 30 or 60 min will provide a reasonable estimate of rocky reef fish diversity and relative abundance for comparative purposes, on these shallow rocky reefs. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.
机译：诱饵远程水下录像（BRUV）已成为一种广泛用于调查鱼群的流行技术。但是，由于各种原因，BRUV方法学也有很大不同。主要的二分法尤其发生在采样鱼群的时间，即BRUV凝固时间。这项研究的目的是确定设定时间的差异是否可能影响使用不同设定时间的研究得出的结论，以及使用哪种温度来采样温带礁鱼组合最合适和最具成本效益的设定时间。在这项研究中，我们测试了在BRUV采样中使用的两个主要设置时间（即30分钟和60分钟）之间是否存在显着差异，以用于岩石礁鱼类的组装模式，物种多样性和相对丰度。特别是，我们对可捕鱼和未捕鱼的礁石进行了采样，以评估不同的设置时间是否会导致模式的差异或后续数据的解释。我们在澳大利亚东海岸的两个海洋公园的六个礁石上（20-35 m）对鱼类组合进行了采样。在每个地点，在“禁止捕捞”地区（海洋保护区）和一个捕鱼区中部署了BRUV复制品30分钟和60分钟。跨捕捞区和无捕捞区的数据解释与两个设定时间一致，表明两个设定时间的结论具有可比性。此外，在设定的时间之间，鱼类组合或物种丰富度没有差异。具有娱乐性和商业意义的鲷鱼（Chrysophrys auratus）的相对丰度在更长的设置时间内会更大，但是区域之间和位置之间的实际空间格局是一致的。对物种积累的断点时间进行分段回归分析，发现地点之间或捕鱼区与未捕鱼区之间没有显着差异。平均断点是物种积累发生变化的时间，发生在12分钟+/- 1.04 S.E.对于所有场所，较短的凝固时间成本更低，并且所需的现场和实验室时间也更少。这项研究量化了30或60分钟，将为这些浅礁石提供合理的估计，以用于比较目的的礁石鱼多样性和相对丰度。官方版权（C）2014，Elsevier B.V.保留所有权利。

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