Collaborative Fisheries Survey Data

To characterize the fish communities associated with nearshore rocky reef habitat, we collaborated with commercial passenger fishing vessel (CPFV) captains and volunteer anglers to conduct hook-and-line surveys in four pairs of MPA and reference sites. Sampling was conducted with scientific crews of six: four anglers, a sampler who handled, measured, and tagged fish, and a data recorder. Each of the four anglers used a different combination of baited or un-baited lures that represented gear frequently used by recreational anglers to catch the target species. Sites were sampled by fishing for 45 minutes in each of four 500 meter by 500 meter sampling cells, which were randomly selected from a set of cells that covered bottom areas containing at least 20 percent rocky reef habitat, by area. Captains were directed to drift within the cells over areas of rocky habitat for a maximum of 15 minutes per drift, so that at least three areas of habitat within each cell would be sampled. Captured fish were identified to species, measured to the nearest millimeter in fork length, tagged with an external t-bar anchor tag, and returned to the water, using a descending device if needed. Each site was sampled five times, three from June-October 2014, and twice from May-August 2015.为表征近岸岩礁生境相关的鱼类群落，我们联合商业载客渔船（Commercial Passenger Fishing Vessel, CPFV）船长与志愿垂钓者，在4组海洋保护区（Marine Protected Area, MPA）与对照样点开展钩钓调查。本次采样由6人组成的科研团队完成：4名垂钓者、1名负责处理、测量并标记鱼类的采样员，以及1名数据记录员。4名垂钓者各自使用一套不同的带饵或无饵诱饵组合，该组合匹配休闲垂钓者用于捕捞目标鱼种的常用钓具。每个样点的采样作业在4个500米×500米的采样单元内开展，每个单元垂钓时长为45分钟；上述采样单元是从按面积计覆盖至少20%岩礁生境的底域单元集合中随机选取的。船长需在采样单元内的岩礁生境区域进行漂流垂钓，单次漂流时长不超过15分钟，以确保每个采样单元内至少对3处生境区域开展采样。捕获的鱼类需鉴定至物种水平，测量其叉长至最接近1毫米的精度，使用外部T型锚定标签进行标记后放归，必要时使用减压装置。每个样点共开展5次采样：2014年6-10月3次，2015年5-8月2次。