Assessing range shifts of tropical reef fishes: A comparison of belt transect and roaming underwater visual census methods
Assessing range shifts of tropical reef fishes: A comparison of belt transect and roaming underwater visual census methods
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评估热带珊瑚礁鱼类的范围变化：带样线和漫游水下目视普查方法的比较
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发表时间：
2014
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通讯作者：
D. Booth
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作者：
H. Beck;D. Feary;W. Figueira;D. Booth
准确、精确、高效的水下目视普查（UVc）对于探测和监测珊瑚礁鱼类的活动范围变化至关重要。本研究比较了时间等效带样带和全球定位系统（GPs）跟踪漫游调查在评估澳大利亚东南部范围扩大的热带鱼种群数量方面的效用。漫游调查在估计焦点雀鲷Abudefduf vaigiensis （Quoy and Gaimard, 1825）密度方面明显比带样带更准确和精确，而对更罕见的焦点物种Abudefduf whitleyi （Allen and robertson, 1974）密度估计的准确性和精度在不同方法之间没有显著差异。漫游调查的物种丰富度和组合多样性显著高于带状样带。漫游调查的效率也是带状调查的两倍多，其定义为单位时间内搜索的面积；漫游调查和带样的平均效率分别为33.56 （sE 1.22）和12.57 (sE 0.66) m2 min-1。具有不同经验的观察者的结果是一致的。可靠的密度估计、提高的效率和最大限度地观察热带鱼表明，gps跟踪漫游调查非常适合探测和监测珊瑚礁鱼类的范围变化。
Accurate, precise, and efficient underwater visual censuses (UVc) are vital for detecting and monitoring range shifts of reef fishes. The present study compared the utility of time-equivalent belt transects and Global Positioning system (GPs)-tracked roaming surveys for assessing populations of range-expanding tropical fishes off southeastern Australia. roaming surveys were significantly more accurate and precise than belt transects in estimating densities of focal damselfish, Abudefduf vaigiensis (Quoy and Gaimard, 1825), while the accuracy and precision of density estimates did not significantly differ between methods for the rarer focal species, Abudefduf whitleyi (Allen and robertson, 1974). significantly greater species richness and assemblage diversity were detected by roaming surveys than belt transects. roaming surveys were also over twice as efficient, defined as the area searched per unit time, as belt transects; mean efficiency of roaming surveys and belt transects was 33.56 (sE 1.22) and 12.57 (sE 0.66) m2 min-1, respectively. results were consistent among observers with varied experience. reliable density estimates, improved efficiency, and maximized sightings of tropical fishes suggest GPs-tracked roaming surveys are highly suited for detecting and monitoring range shifts of reef fishes.