The waste of fish resources constitutes a serious environmental problem that must be avoided. The valorisation of by-catch species and decreasing the discard rate constitute a more efficient and sustainable use of these marine biomasses. In this work, we characterize and propose different potential uses for Stromateus brasiliensis, another frequently discarded (≥ 90%) and poorly studied by-catch species captured in the South Atlantic Ocean (FAO 41) by trawler fishing fleets. Furthermore, in the case of this species, freezing and frozen storage of the whole fish is the only strategy currently employed for its exploitation. The results revealed that muscle from S. brasiliensis presented a high content of polyunsaturated fatty acids (20.34%) and that the concentrations of both total diacyl glyceryl ethers (2.41%) and heavy metals (Hg 0.038, Pb 0.006 and Cd 0.018 mg/kg) were below the established limits for safe human consumption. Likewise, the protein hydrolysates proved to be a good source of amino acids for human consumption or animal feeding. Minced muscle blocks could be made by a mechanical separation process of the flesh, and the composition of minced muscle did not differ much from that of the whole fish. Furthermore, this process allows the incorporation of cryoprotectants and antioxidants to extend the frozen shelf life of this fatty fish. An extraction process from mechanically mixed skin and bones yielded a good source of collagen that should not be neglected.

中文翻译：

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西南大西洋butter鱼（Stromateus brasiliensis）的价格表征和潜在策略。

鱼资源的浪费是一个严重的环境问题，必须避免。副渔获物种类的增值和丢弃率的降低构成了这些海洋生物量的更有效和可持续的利用。在这项工作中，我们表征并提出了巴西松果（Stromateus brasiliensis）的不同潜在用途，巴西松果是另一种经常被拖网捕捞的渔船捕获在南大西洋（FAO 41）的副渔获物（≥90％），但研究得很少。此外，就该物种而言，整条鱼的冷冻和冷冻储存是目前用于其开发的唯一策略。结果表明，巴西利亚链球菌的肌肉提出了高含量的多不饱和脂肪酸（20.34％），总二酰基甘油醚（2.41％）和重金属（Hg 0.038，Pb 0.006和Cd 0.018 mg / kg）的浓度均低于安全人体的既定限值消费。同样，蛋白质水解产物被证明是人类食用或动物饲养的良好氨基酸来源。切碎的肌肉块可以通过肉的机械分离过程制成，切碎的肌肉的成分与整条鱼的成分相差不大。此外，该方法允许掺入冷冻保护剂和抗氧化剂来延长这种肥鱼的冷冻保存期限。从机械混合的皮肤和骨骼中提取的过程产生了良好的胶原蛋白来源，不应忽视。