Tracking Seasonal Movements of Adult Pacific Herring in Prince William Sound, 2012-2016, EVOS Herring Program. Ocean Tracking Array Expansion 2016.

Tracking Seasonal Movements of Adult Pacific Herring in Prince William Sound, 2012-2016, EVOS Herring Program These data are part of the Herring Research and Monitoring Program of the Exxon Valdez Oil Spill Trustee Council, which is a multi-faceted study to determine why herring populations in Prince William Sound remain depressed since the early 1990s. In Prince William Sound (PWS) adult herring disperse after spawning, however their movement patterns are poorly understood. Acoustic telemetry is a tool used to track fish to understand more about their seasonal movements. This project (EVOS project numbers: 12120111-B, 13120111-B, 14120111-B) tested the utility of acoustic tags for tracking the seasonal migrations of adult herring into and out of PWS. In April 2012 and 2013 adult herring were captured on their spawning grounds in Port Gravina (northeast PWS) using jigs. The herring were then sedated, measured and a small acoustic tag surgically implanted. In 2012 25 herring were acoustically tagged, and 69 herring were tagged in 2013. Post release tagged herring were monitored by acoustic receiver arrays with two receivers located near the entrance to Port Gravina (on the eastern and western side) through 19 May 2012, when data was uploaded. In 2013, coverage in Port Gravina was expanded and included an array of nine receivers. Receivers were deployed in Port Gravina from 7-8 April through 21 May 2013 when receivers were removed. As part of the Ocean Tracking network (www.oceantrackingnetwork.org), receiver arrays were also deployed across the principal entrances into the Sound from the Gulf of Alaska during March 2013. Arrays were located at Hinchinbrook Entrance, Montague Strait, and the four southwest passages in Prince William Sound. Data from the Ocean Tracking Network arrays were uploaded in February and May 2014, after transmitters had expired. Tag life on transmitters was estimated at ~ 263 days. This dataset contains four comma-separated values (csv) files each containing the tagging log and acoustic receiver detection log for each tagging year (e.g. 2012 and 2013). The files named 'Herring Tagging Log' describe the length and weight measurements and spawning-state characteristics for each acoustic tagged fish. The files named 'AcousticTaggedHerringDetections' are acoustic receiver detection logs containing the data, time, and location of tagged herring detections. Ocean Tracking Network Array Expansion, 2016 In 2013, we documented post-spawn migration of herring from Port Gravina to the PWS entrances by acoustic tagging adult herring and collecting data from the Ocean Tracking Network acoustic arrays. The 2013 study, however, could not verify if herring were migrating out into the Gulf of Alaska (GOA) and then returning to PWS because of the single-line layout of the Ocean Tracking Network arrays. The February 2017 acoustic array expansion created a double-line of receivers in known areas of high traffic by herring at the Ocean Tracking Network. This will allow PWSSC researchers to document adult herring migration movements out from and into PWS, and to better understand factors that influence migration patterns including age, condition, spawning location, and residency in PWS. The dataset contains one csv file containing array location, station name, deploy latitude, deploy longitude, and deploy depth for the receivers deployed during February 2017 as part of project 16160111-S.2012-2016年威廉王子湾成年太平洋鲱季节性移动追踪（EVOS鲱鱼项目） 本数据集隶属于埃克森瓦尔迪兹溢油赔偿委员会的鲱鱼研究与监测项目，该项目为多维度研究，旨在探明1990年代初以来威廉王子湾（Prince William Sound, PWS）鲱鱼种群持续低迷的原因。在威廉王子湾内，成年鲱鱼产卵后会发生扩散，但学界对其移动模式仍知之甚少。声学遥测（acoustic telemetry）是一种用于追踪鱼类、以深入解析其季节性移动规律的技术手段。本项目（EVOS项目编号：12120111-B、13120111-B、14120111-B）验证了声学标签用于追踪成年鲱鱼往返威廉王子湾的季节性洄游的实用性。 2012年4月与2013年4月，研究人员采用拖钓法，在格拉维纳港（威廉王子湾东北部）的产卵场捕获成年鲱鱼。随后对鲱鱼实施麻醉、体长测量，并通过外科手术植入小型声学标签。2012年共标记25尾鲱鱼，2013年则完成69尾鲱鱼的标记。 截至2012年5月19日数据上传时，研究人员通过声学接收器阵列对放流后的标记鲱鱼进行持续监测，该阵列在格拉维纳港入口附近（东西两侧各部署1台接收器）布设。2013年，格拉维纳港的监测覆盖范围得到扩展，布设了包含9台接收器的阵列。接收器于2013年4月7日至8日完成部署，至同年5月21日被回收。 作为海洋追踪网络（Ocean Tracking Network, OTN）（www.oceantrackingnetwork.org）的组成部分，研究团队还于2013年3月在阿拉斯加湾（Gulf of Alaska, GOA）通往威廉王子湾的主要入口处部署了声学接收器阵列。这些阵列分别布设於欣钦布鲁克入口、蒙塔古海峡以及威廉王子湾的4处西南水道。海洋追踪网络阵列的数据在发射机续航期满后，于2014年2月与5月完成上传。经估算，标签发射器的续航时长约为263天。 本数据集包含4个逗号分隔值（Comma-Separated Values, CSV）文件，分别对应2012年与2013年两个标记年份的标记日志与声学接收器检测日志。其中名为"Herring Tagging Log"的文件记录了每尾声学标记鲱鱼的体长、体重测量数据以及产卵状态特征；名为"AcousticTaggedHerringDetections"的文件为声学接收器检测日志，包含标记鲱鱼被检测到的时间、数据与位置信息。 ## 海洋追踪网络阵列扩容（2016年） 2013年的研究通过声学标记成年鲱鱼并结合海洋追踪网络的声学阵列数据，探明了鲱鱼从格拉维纳港产卵后洄游至威廉王子湾入口的移动路径。但由于当时海洋追踪网络阵列采用单线布局，该研究无法验证鲱鱼是否会洄游至阿拉斯加湾后再返回威廉王子湾。 2017年2月实施的声学阵列扩容工程，在已知的鲱鱼高频活动区域布设了双线接收器阵列。这将助力威廉王子湾鲱鱼科学委员会（PWSSC）的研究人员探明成年鲱鱼往返威廉王子湾的移动路径，并更好地理解影响洄游模式的各类因素，包括年龄、健康状况、产卵位置以及在威廉王子湾的居留时长。 本数据集包含1个CSV文件，记录了2017年2月作为项目16160111-S的一部分所部署的接收器的阵列位置、站点名称、部署纬度、部署经度以及部署水深。