Striped bass (Morone saxatilis) is a species with high production potential for human consumption. However, like any other cultured species, they are prone to be exposed to adverse climate conditions, compromising their health status until a certain degree compromises the success of reaching commercial size. It is proposed that haematological parameters testing during the whole growing out season represents a useful tool to assess the overall fish health status. Information on M. saxatilis haematology is limited. Therefore, the present study aimed was to provide the haematological and blood chemistry values for commercial striped bass grow‐out. Fish from three different group sizes and under low sub‐optimal temperature (16 to 18°C) were sampled in correlation to copepods (Peniculus sp.) present attached to the fins. Thirty fish from each group (sized 0.17, 0.54 and 1.17 kg, corresponding to different ages and batches) were all sampled (blood and external parasites count) during the spring (5 June, June 12 and June 16, 2019). The results show that differences in blood parameters were only observed according to the weight of striped bass such as the haematocrit (HCT), haemoglobin, mean corpuscular haemoglobin concentration (MCHC), white blood cells (WBC) count, total protein, globulin, ratio A/G, cholesterol, triglycerides and glucose. In contrast, the copepods present showed a preference for the caudal fin of the striped bass, followed by the first dorsal and pectoral fin. The smaller fish (0.179 kg) were the most susceptible to Peniculus sp., compared to the largest fish (1.174 kg). So far, it can be concluded that at this stage, the copepod does not show any adverse effect on the fish health since the condition factor and blood parameters were statistically similar along with the different copepod infestation levels (intensity ranged from 7 to 109). However, this new copepod, here registered for the first time in the Morone saxatilis, was registered during the sunset to increase environmental temperature. Even if no signs of a harmful relationship between parasites between young and old organisms, it will be necessary to be further monitored. The copepod incidence and the blood parameters should be analysed along the year (different temperatures), aiming to detect any correlation to the copepods present or, in any case, the overall health status or another parasite present under the seabass culture conditions.

中文翻译：

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在成年期在海笼养殖中暴露于低温下的条纹鲈鱼（Morone saxatilis）的健康状况评估

条纹鲈（Morone saxatilis）是具有高消费潜力的物种。但是，像其他任何养殖物种一样，它们很容易暴露在不利的气候条件下，危害其健康状况，直到一定程度地影响了达到商业规模的成功。建议在整个生长季节进行血液学参数测试是评估总体鱼类健康状况的有用工具。关于萨克斯支气管炎血液学的信息是有限的。因此，本研究旨在为商业条纹鲈的生长提供血液学和血液化学价值。与co足类动物相关地对来自三个不同组别大小且处于次优低温（16至18°C）下的鱼进行了采样（Peniculus sp。）目前附着在鳍上。在春季（2019年6月5日，6月12日和6月16日）对每组的30条鱼（大小分别为0.17、0.54和1.17千克，分别对应不同的年龄和批次）进行采样（血液和外部寄生虫计数）。结果表明，仅根据条纹鲈的重量观察到血液参数的差异，例如血细胞比容（HCT），血红蛋白，平均红细胞血红蛋白浓度（MCHC），白细胞（WBC）计数，总蛋白，球蛋白，比率A / G，胆固醇，甘油三酸酯和葡萄糖。相反，存在的the足类动物偏爱条纹鲈的尾鳍，其次是第一背鳍和胸鳍。较小的鱼（0.179公斤）最易受半岛与最大的鱼（1.174公斤）相比。到目前为止，可以得出结论，在这个阶段，blood足类对鱼类健康没有任何不利影响，因为条件因子和血液参数在统计上相似，并且similar足类的侵染水平不同（强度范围为7至109）。但是，这种新的co足类在这里首次在Morone saxatilis中注册，是在日落时注册的，以提高环境温度。即使没有迹象表明新老生物之间的寄生虫之间存在有害关系，也有必要进行进一步监测。along脚类动物的发病率和血液参数应按年（不同的温度）进行分析，目的是检测与present脚类动物存在的任何相关性，或者无论如何，要与鲈鱼养殖条件下存在的整体健康状况或其他寄生虫相关联。