The aim of this study was to compare the catch quality of Northeast Atlantic cod (Gadus morhua) in the Barents Sea bottom trawl fishery caught using the conventional configuration (a sorting grid followed by a diamond mesh (T0) codend) and a T90° turned mesh codend (T90) without a grid. Twenty hauls were conducted, consisting of 10 hauls with the conventional configuration and 10 hauls with the T90-codend. The catch quality was assessed using the catch-damages-index (CDI) and a newly developed method using VIS/NIR hyperspectral imaging to estimate the residual blood abundances in the fish muscle. The probability of obtaining fish with no damage was 23.4% (CI: 16.3–31.1%) for cod captured by the conventional configuration, and 21.2% (CI: 15.4–27.2%) for cod captured by the T90-codend. The average blood abundance (in arbitrary unit) was 0.86 (CI: 0.85–0.87) for cod captured by the conventional configuration and 0.88 (CI: 0.87–0.88) for cod captured by the T90-codend. Catch quality of the hauls obtained using the two gears did not differ significantly in terms of catch damage or residual blood levels in the cod. Hence, this study demonstrated that T90-codends do not compromise catch quality compared to regular diamond meshed codends.

本研究的目的是比较东北大西洋鳕鱼（Gadus morhua ）的捕捞质量。) 在巴伦支海底拖网渔业中，使用常规配置（分拣网格后接菱形网 (T0) 编码器）和 T90° 转向网格编码器 (T90) 而不使用网格。进行了 20 次运输，其中 10 次采用传统配置，10 次采用 T90-codend。使用捕获损伤指数 (CDI) 和新开发的方法评估捕获质量，该方法使用 VIS/NIR 高光谱成像来估计鱼肌肉中的残余血液丰度。常规配置捕获鳕鱼的概率为 23.4% (CI: 16.3–31.1%)，而 T90-codend 捕获的鳕鱼的概率为 21.2% (CI: 15.4–27.2%)。常规配置捕获的鳕鱼的平均血液丰度（任意单位）为 0.86（CI：0.85-0.87）和 0.88（CI：0.87-0。88) 用于 T90-codend 捕获的鳕鱼。使用两个齿轮获得的捕获质量在捕获损坏或鳕鱼中残留血液水平方面没有显着差异。因此，这项研究表明，与常规菱形网眼密码鱼相比，T90 密码鱼不会影响捕获质量。