Biological Sampling Survey Stations Catch Numbers

Catch numbers data collected from a bottom trawl survey series: Trawl positions, duration and gear parameters; catch statistics of the target species; length frequency distributions; age, sex and maturity. The target species are: cod, haddock, whiting, saithe, hake, black and white-bellied anglerfish, megrim, plaice, sole, herring, blue whiting, mackerel, horse mackerel, blonde ray, cuckoo ray, spotted ray and thornback ray. Data coverage has been for the waters around Ireland from 10m to 180m in depth (Irish Sea, Celtic Sea, West and North of Ireland). The spatial coverage has varied from year-to year. The sampling locations have been selected from known fishing tracks while trying to ensure maximum spatial spread over the survey area. The surveys took place in February-March of 2004-2009. Samples were collected using a GOV bottom trawl (a scaled-down version of the IBTS standard, see: Manual for the International Bottom Trawl Surveys, ICES Survey Protocols SISP 1-IBTS VIII). The main purpose of the survey was to collect information on the length and age at which target species first reach maturity in the waters around Ireland. The surveys were carried out by the Marine Institute (Ireland) Fisheries Science team. All data collected on the survey are available.本数据集源自一系列底拖网调查所采集的渔获量数据，涵盖拖网站位、作业时长与渔具参数；目标物种的渔获统计数据、体长频率分布以及年龄、性别与性成熟度信息。本次调查的目标物种包括：鳕鱼（cod）、黑线鳕（haddock）、银无须鳕（whiting）、绿青鳕（saithe）、无须鳕（hake）、黑白腹鮟鱇（black and white-bellied anglerfish）、菱鲆（megrim）、欧鲽（plaice）、鳎（sole）、鲱（herring）、蓝鳕（blue whiting）、鲭（mackerel）、竹荚鱼（horse mackerel）、金黄鳐（blonde ray）、孔鳐（cuckoo ray）、斑鳐（spotted ray）以及棘鳐（thornback ray）。数据覆盖爱尔兰周边水深10米至180米的海域，包括爱尔兰海、凯尔特海以及爱尔兰西部与北部海域，其空间覆盖范围随年度有所变动。采样站位选自已知的捕捞航线，同时尽可能确保调查区域内的空间分布最大化。调查于2004年至2009年的2-3月间开展，采样作业采用GOV底拖网，该网具为国际底拖网调查标准（IBTS）拖网的缩小版本，详细信息参见《国际底拖网调查手册》及国际海洋考察理事会（ICES）调查规程SISP 1-IBTS VIII。本次调查的核心目的为采集爱尔兰周边海域目标物种首次性成熟时的体长与年龄数据。本调查由爱尔兰海洋研究所渔业科学团队执行，所有调查采集数据均已公开。