European eel (Anguilla anguilla) recruitment in Comacchio lagoon (Italy) data

This dataset was managed for the aims of the project ECOSISTER (Ecosystem for Sustainable Transition in Emilia-Romagna), WP3 of Spoke 5 and provides information about the captured glass eels entering in the Comacchio Lagoon (NE Italy), one of the most important coastal wetlands in Europe for biodiversity conservation and one of the most important places for eels fishery. To capture glass eels entering in the Comacchio Lagoon, four sampling sites (Foce, Bellocchio, Gobbino and Passo Pedone sites were selected at gateways or canals, which directly connect the lagoon to the sea. Environmental and meteorological variables are also provided. The dataset is provided in two formats: - Microsoft Excel XLSX file, including 3 sheets (Dataset, Fields and units, Taxonomy) - CSV files (UTF-8), 3 files corresponding to the 3 sheets of the Excel file The dataset includes 59 CPUE data for different sampling dates and sampling locations. Glass eels sampling was performed from 19/01/2011 to 7/4/2011. All the dataset fields are described in the Excel sheet/CSV file “Fields and units”, while the taxonomic related information for each taxon is provided in the Excel sheet/CSV file “Taxonomy”. Information extracted from the World Register of Marine Species (WoRMS; https://marinespecies.org/) is provided here (see details in Table 2). Table 1. Fields in the dataset (NA=not available). Field Darwin Core term Unit Precision Note decimalLatitude decimalLatitude decimal degrees ± 0.00001 WGS84 (EPSG: 4326) - WAAS/EGNOS enabled GPS position decimalLongitude decimalLongitude decimal degrees ± 0.00001 WGS84 (EPSG: 4326) - WAAS/EGNOS enabled GPS position dateIdentified dateIdentified DD/MM/YY NA The date on which the sampling was performed SamplingGear NA NA NA a modified fyke net (called “cogollo”) CPUE organismQuantity CPUE, based on number of netlifts NA Number of individuals caught per fyke net per day Cond measurementType mS/cm NA Conducibility of the water DO measurementType mg/l NA Dissolved oxygen pH measurementType NA NA pH Salinity measurementType ppt NA Salinity Temp measurementType °C NA Water temperature Wind_Prev measurementType NA NA Prevailing wind direction MoonPh measurementType % NA Percentage of the illuminated moon disk Table 2. Provided taxonomic information. Taxon the name used in the dataset ScientificName_accepted the name accepted according WoRMS AphiaID Unique identifier in WoRMS Kingdom Taxonomic level Phylum Taxonomic level Class Taxonomic level Order Taxonomic level Family Taxonomic level Genus Taxonomic level Species Taxonomic level This dataset permitted the analysis of glass eel recruitment in the Comacchio lagoon through the publication of Lanzoni, M., Gavioli, A., Castaldelli, G., Aschonitis, V., Milardi, M. (2022). Swoon over the moon: The influence of environmental factors on glass eels entering Mediterranean coastal lagoons. Estuarine, Coastal and Shelf Science 264 (2022) 107668. https://doi.org/10.1016/j.ecss.2021.107668. This dataset is the unique dataset in the Adriatic Sea, and thus along the cost of Emilia-Romagna region, providing temporal and spatial information about glass eel recruitment. The data can help promoting eel stocks restoration through local management. For example, from the data, it was evident that glass eel migration peaked in two period and which temporal and water quality variables affected body size of glass eels, with bigger glass eels caught later in the season. Furthermore, the dataset included information of one of the most important areas for conservation. In fact, the Comacchio lagoon is included in the 2000 Nature network as IT4060002 “Valli di Comacchio” site and also in the Ramsar convention as important wetlands. Finally, the Anguilla anguilla species is critically endangered, according to the IUCN, and is included in the 92/43/EEC Directive. Therefore, information on its current population status is necessary.本数据集由ECOSISTER项目（Ecosystem for Sustainable Transition in Emilia-Romagna，即艾米利亚-罗马涅大区可持续转型生态系统）的第5分中心工作包3（WP3）管理，旨在提供意大利东北部科马基奥潟湖（Comacchio Lagoon）入境玻璃鳗（glass eel）的相关监测信息。科马基奥潟湖是欧洲生物多样性保护的核心滨海湿地之一，同时也是欧洲鳗鲡捕捞的重要产区。 为捕获进入科马基奥潟湖的玻璃鳗，研究团队在潟湖与外海直接连通的闸口及河道布设了4个采样点位：福切（Foce）、贝洛基奥（Bellocchio）、戈比诺（Gobbino）与帕索佩多内（Passo Pedone）。数据集同步包含环境与气象变量信息。 本数据集提供两种存储格式： 1. Microsoft Excel XLSX文件，内含3个工作表："Dataset"、"Fields and units"与"Taxonomy"； 2. UTF-8编码的逗号分隔值（CSV）文件，共3个，分别对应Excel文件的3个工作表。 数据集涵盖2011年1月19日至2011年4月7日期间，不同采样日期与点位的59条单位捕捞努力量渔获量（Catch Per Unit Effort, CPUE）数据。 数据集各字段的详细说明已收录于Excel工作表/CSV文件"Fields and units"中，各分类单元的分类学信息则存储于"Taxonomy"工作表/CSV文件。本数据集采用了世界海洋物种登记册（World Register of Marine Species, WoRMS; https://marinespecies.org/）的相关信息，详细说明见表2。 表1 数据集字段说明（NA=无可用信息） | 字段名 | 达尔文核心术语（Darwin Core term） | 单位 | 精度 | 说明 | |----------------------|------------------------------------|---------------------|---------------|----------------------------------------------------------------------| | decimalLatitude | decimalLatitude | 十进制度 | ±0.00001 | WGS84（EPSG: 4326）坐标系，采用启用WAAS/EGNOS功能的GPS获取定位信息 | | decimalLongitude | decimalLongitude | 十进制度 | ±0.00001 | WGS84（EPSG: 4326）坐标系，采用启用WAAS/EGNOS功能的GPS获取定位信息 | | dateIdentified | dateIdentified | DD/MM/YY | 无可用信息 | 采样执行日期 | | SamplingGear | 无可用信息 | 无可用信息 | 无可用信息 | 改良型叶形刺网（俗称"cogollo"） | | CPUE | organismQuantity | 以单次起网数计的CPUE | 无可用信息 | 单日单张刺网的捕获个体数 | | Cond | measurementType | mS/cm | 无可用信息 | 水体电导率 | | DO | measurementType | mg/L | 无可用信息 | 水体溶解氧 | | pH | measurementType | 无可用信息 | 无可用信息 | 水体pH值 | | Salinity | measurementType | ppt | 无可用信息 | 水体盐度 | | Temp | measurementType | °C | 无可用信息 | 水体温度 | | Wind_Prev | measurementType | 无可用信息 | 无可用信息 | 主导风向 | | MoonPh | measurementType | % | 无可用信息 | 月球被照亮盘面的百分比（月相占比） | 表2 提供的分类学信息 | 列名 | 数据集中使用的名称 | 按WoRMS标准确认的科学名称 | WoRMS唯一标识符 | 分类层级 | |------------|--------------------|--------------------------|----------------|----------------| | Kingdom | 界 | | | 界级分类单元 | | Phylum | 门 | | | 门级分类单元 | | Class | 纲 | | | 纲级分类单元 | | Order | 目 | | | 目级分类单元 | | Family | 科 | | | 科级分类单元 | | Genus | 属 | | | 属级分类单元 | | Species | 种 | | | 种级分类单元 | 本数据集可用于科马基奥潟湖玻璃鳗补充群体的动态分析，相关研究成果发表于Lanzoni M.、Gavioli A.、Castaldelli G.、Aschonitis V.、Milardi M.于2022年刊发的论文：《Swoon over the moon: The influence of environmental factors on glass eels entering Mediterranean coastal lagoons》，刊载于*Estuarine, Coastal and Shelf Science* 2022年第264卷，文章编号107668，DOI: 10.1016/j.ecss.2021.107668。 本数据集是亚得里亚海及艾米利亚-罗马涅大区沿岸唯一一套兼具时空维度的玻璃鳗补充群体调查数据集，可助力当地开展欧洲鳗鲡种群修复管理工作。研究结果表明，玻璃鳗洄游存在两个高峰期，同时明确了影响玻璃鳗个体规格的时间与水环境变量：季节越晚捕获的玻璃鳗个体体型越大。 此外，科马基奥潟湖是欧洲重要的保护区域：其先后被纳入欧盟2000年自然网络（Natura 2000）的IT4060002号"Valli di Comacchio"保护地，同时列入《拉姆萨尔公约》重要湿地名录。根据国际自然保护联盟（International Union for Conservation of Nature, IUCN）红色名录，欧洲鳗鲡（Anguilla anguilla）已被列为极危物种，同时被纳入92/43/EEC欧盟自然保护指令范畴。因此，该种群的现状监测信息具有极高的科研与保护价值。