Activity budgets and space use for two common Pacific parrotfish (Chlorurus Sp.) at Palmyra Atoll National Wildlife Refuge

Data was collected at Palmyra Atoll National Wildlife Refuge located in the Central Pacific in 2014, and the work focuses on two species of Parrotfish, Chlorurus microrhinos and Chlorurus spilurus (formerly Cholrurus sordidus). For C. microrhinos, the project was designed to collect fine-scale spatial behavior data, focusing on territory size, species interactions, and benthic impact (i.e. feeding behavior). Focal follow data was collected by one or two observer(s), either on snorkel or SCUBA, and recording focal activity down to the second. Simultaneously, the observer would be towing a GPS that was recording a location every 5 seconds and each location was then associated with a particular behavior. Throughout this study individual fish were identifiable and successive follows were possible on individuals. For C. spilurus the focus of the project was to collect behavioral time budget data on feeding, territorial defense, and spawning behavior. The ‘Chlorurus_Area_Palmyra_2014.csv’ data only covers C. Microrhinos and gives the 95% KUD area estimation for GPS towed tracks, as well as the 95% KUD area for locations where feeding was occurring. We also report the step length between successive points for the entire follow as well as where feeding was occurring. The ‘Chlorurus_Activity_Palmyra_2014.csv’ is for both C. Microrhinos and C. spilurus and reports the start and stop time of each focal follow as well as the start and stop time of each activity. Activity descriptions can be found in the metadata and the total length and phase for each individual in our study can be found in ‘Fish_Information_Chlorurus_Data_2014.csv.

本数据集采集于2014年位于中太平洋的帕尔迈拉环礁国家野生动物保护区（Palmyra Atoll National Wildlife Refuge），研究聚焦于两种鹦嘴鱼（Parrotfish）：小鼻绿鹦嘴鱼（Chlorurus microrhinos）与斑鳍绿鹦嘴鱼（Chlorurus spilurus，原分类为Chlorurus sordidus）。针对小鼻绿鹦嘴鱼，本项目旨在采集精细尺度的空间行为数据，重点关注其领地范围、物种间互动以及底栖影响（即取食行为）。目标个体追踪数据由1至2名观察员通过浮潜或水肺潜水的方式采集，对目标个体的行为进行精确到秒的连续记录。与此同时，观察员拖拽一台每5秒记录一次位置的GPS设备，随后将每个位置记录与特定行为进行关联。本研究中可通过个体特征识别单条鱼类，因此可对同一目标个体进行多次连续追踪。针对斑鳍绿鹦嘴鱼，本项目的研究目标为采集其取食、领地防御与产卵行为的行为时间预算数据。本次发布的"Chlorurus_Area_Palmyra_2014.csv"仅包含小鼻绿鹦嘴鱼的数据，提供了基于GPS拖拽轨迹估算的95%核利用度（KUD，Kernel Utilization Distribution）面积，以及发生取食行为的位置对应的95%核利用度面积。本数据集还报告了整个追踪过程中连续采样点之间的步长，以及仅发生取食行为时的连续采样点步长。"Chlorurus_Activity_Palmyra_2014.csv"则涵盖了小鼻绿鹦嘴鱼与斑鳍绿鹦嘴鱼两类物种，记录了每一次目标个体追踪的起止时间，以及每一种行为的起止时间。行为描述可参见配套元数据，研究中所有个体的总体长与发育阶段信息可在"Fish_Information_Chlorurus_Data_2014.csv"中获取。