sea trout recruit density in Swedish rivers, catches from fisheries, predators density and habitat variables collected (2000 - 2022)

This is a dataset containing data collected in rivers and at sea, which were spatially harmonized to explore corss-system effects of stressors on sea trout recruit density in Swedish rivers. Specifically, the data were used to assess the influence of inland stressors (recreational fishing and river barriers) and marine stressors (commercial and recreational fishing, and predator densities of grey seals Halichoerus grypus and great cormorants Phalacrocorax carbo) on sea trout recruits in rivers, while accounting for habitat quality variables. Column headers and explanation: ID: unique identifier for observations, numeric Year: year of data collection Hflodomr: unique identifier for different catchments, numeric SD: name of ICES subdivision SD_coarse: name of ICES subdivision or group of subdivisions vatten_areal_catch_km2: total water area in the catchment (squared km) Length_Swedish_coastline_km_SD: length of the coastline of the subdivision (km) Length_Swedish_coastline_km_SD_coarse: length of the coastline of the subdivision or group of subdivisions (km) sum_fish_RECR_RIVER: catches of sea trout from recreational fishing in rivers (number of fish retained) n_fishing_days_in_thousands_tot: number of fishing days of recreational fishing at sea (thousand days) Kg_RECR_SEA_SDcoarse: catches of sea trout from recreational fishing at sea (kg of fish retained) sum_NUMB_COMM_SEA_forSERS: catches of sea trout from commercial fishing at sea (number of fish retained) seals_per_km: number of seal per km of coastline cormorants_per_km: number of cormorant breeding pairs per km of coastline River_ID: unique identifier for different rivers (obtained by merging the catchment code and the river name) VDRAGNAM: name of the river avg_river_Trout0P: average river sea trout recruit density (number per 100 squared meters) avg_river_MEDELDJU: average river depth (m) avg_river_LUTNING_PR: average river bed slope avg_river_MEDTEMPAR: average annual air temperature from the meteorological stations closest to each sampling location (degree Celsius) avg_river_BREDD: average river width (m) avg_dam: average number of dams without fishways downstream of sampling sites in a river avg_dam_w_and_without_fishway: average number of dams with or without fishways downstream of sampling sites in a river ratio_dam0: ratio between the number of sites with no dam without fishways downstream and the total number of sites in a river ratio_dam_w_and_without_fishway0: ratio between the number of sites with no dam with or without fishways downstream and the total number of sites in a river sum_Releases: hatchery sea trout released in a river (number fish per year)本数据集采集自瑞典河流与近海水域，经空间标准化处理，旨在探究胁迫因子对瑞典河流中海鳟幼鱼招募密度的跨系统影响。具体而言，本数据集用于评估内陆胁迫因子（休闲垂钓与河流拦障）与海洋胁迫因子（商业捕捞、休闲垂钓，以及灰海豹（Halichoerus grypus）、大鸬鹚（Phalacrocorax carbo）的种群密度）对河流中海鳟幼鱼的影响，同时纳入栖息地质量变量作为控制项。 以下为各列字段的名称与释义： ID：观测值的唯一标识符，数值型 Year：数据采集年份 Hflodomr：不同集水区的唯一标识符，数值型 SD：ICES分区（ICES subdivision）名称 SD_coarse：ICES分区或分区组的名称 vatten_areal_catch_km2：集水区总水域面积（单位：平方千米） Length_Swedish_coastline_km_SD：对应ICES分区的海岸线长度（单位：千米） Length_Swedish_coastline_km_SD_coarse：对应ICES分区或分区组的海岸线长度（单位：千米） sum_fish_RECR_RIVER：河流休闲垂钓捕获的海鳟留存渔获个体数 n_fishing_days_in_thousands_tot：近海休闲垂钓总天数（单位：千日） Kg_RECR_SEA_SDcoarse：近海休闲垂钓捕获的海鳟留存渔获重量（单位：千克） sum_NUMB_COMM_SEA_forSERS：近海商业捕捞捕获的海鳟留存渔获个体数 seals_per_km：每千米海岸线的海豹种群数量 cormorants_per_km：每千米海岸线的鸬鹚繁殖对数量 River_ID：不同河流的唯一标识符（由集水区代码与河流名称合并生成） VDRAGNAM：河流名称 avg_river_Trout0P：河流平均海鳟幼鱼招募密度（单位：每100平方米个体数） avg_river_MEDELDJU：河流平均水深（单位：米） avg_river_LUTNING_PR：河流平均河床坡度 avg_river_MEDTEMPAR：各采样点邻近气象站记录的年平均气温（单位：摄氏度） avg_river_BREDD：河流平均宽度（单位：米） avg_dam：采样点下游河段无过鱼设施的水坝平均数量 avg_dam_w_and_without_fishway：采样点下游河段设有或未设过鱼设施的水坝平均数量 ratio_dam0：采样点下游无拦水坝且无过鱼设施的点位占河流总点位的比例 ratio_dam_w_and_without_fishway0：采样点下游设有或未设过鱼设施的拦水坝点位占河流总点位的比例 sum_Releases：河流内年度放流的孵化场繁育海鳟个体数