General information about lionfish density and envrionmental conditions in Eleuthera, Bahamas from July to August in 2012

<p>This was an observational field study on natural patch reefs with varying lionfish densities to determine if lionfish behavior and movements change at different local lionfish and prey fish densities. &nbsp;Each reef was visited at three times of day: dawn, midday, and dusk, and two focal lionfish were observed during each visit at each reef. Behaviors of all lionfish were recorded the moment they were first sighted (\"Initial behaviors\").&nbsp;One or two focal lionfish were observed for 10 minute intervals and all activity was recorded (\"Focal behaviors\"). &nbsp;The number of lionfish on each reef that arrived at or departed from each reef to/from the surrounding seagrass habtiat was recorded throughout each visit (\"Movement\"). &nbsp;Censuses of the native prey fish populations were conducted at the end of every visit (\"Native fish surveys\").</p>本研究为一项针对狮子鱼密度各异的自然斑礁开展的野外观测研究，旨在探究狮子鱼的行为与移动模式是否会随本地狮子鱼及本地猎物鱼类的密度变化而发生改变。每处斑礁均于一日中的三个时段开展观测：黎明、正午与黄昏；每次对每处斑礁的观测中，均选取两条焦点狮子鱼作为观察对象。所有狮子鱼在首次被观测到时的行为均被记录，该记录项命名为「初始行为（Initial behaviors）」。选取1至2条焦点狮子鱼开展时长10分钟的连续观测，记录其全部活动，该记录项命名为「焦点行为（Focal behaviors）」。在每次观测全程中，记录每处斑礁上往返周边海草栖息地的狮子鱼个体数量（即抵达或离开斑礁的个体数），该记录项命名为「移动情况（Movement）」。每次观测结束后，开展本地猎物鱼类种群普查，该调查项命名为「本地鱼类调查（Native fish surveys）」。