1995 - 1995 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Survey : INA K 1/95 (part of Blackwater Herring Survey (FSS: INA K HER))

This survey was undertaken by Cefas as part of the Blackwater Herring Survey (FSS: INA K HER); A series of cruises carried out from 1989 to 2009 each November on the INA-K in the Thames Estuary. The aims of which were to assess the state of herring ( *Clupea harengus* ) stocks through measurements of length samples and by ageing a stratified selection of fish. The latter was also to determine the stock split between North Sea and Thames fish as there is a great deal of mixing of stocks in the area. Stock identification was done by a combination of first year growth observed in the otolith and the maturity stage of the fish. Survey took place between 11/11/1995 and 22/11/1995 on INA K Equipment used during this survey : - Larson Sprat Trawl Survey operations were undertaken on 34 stations 5 different species were caught on this survey本调查由英国环境、渔业与水产养殖科学中心（Cefas）作为黑水鲱鱼调查（FSS: INA K HER）的一部分开展。 该系列科考航行于1989年至2009年间的每年11月，在泰晤士河口的INA-K船上实施。本次调查的目标共有两项：其一为通过测量长度样本以及对分层选取的鲱鱼样本进行年龄鉴定，评估大西洋鲱（Clupea harengus）的种群现状；其二为明确北海鲱与泰晤士河鲱的种群构成比例，因该区域内鲱鱼种群混杂现象十分普遍。种群鉴定通过结合耳石（otolith）观测到的第一年生长纹与鱼类的成熟度来完成。 本次具体调查时段为1995年11月11日至1995年11月22日，搭载平台为INA K。 本次调查使用的设备如下： - 拉尔森沙丁鱼拖网（Larson Sprat Trawl） 本次调查共布设34个采样站位，共捕获5个不同的鱼类物种。