Abstract The issue of seafood waste has been gaining attention globally due to the increasing demand for seafood, its negative impacts on the environment, and its implications for marine conservation and policy. This study examined seafood waste in Namibia, a country with a large commercial fishing industry but limited baseline data on seafood waste. To gain insight into seafood wastage and waste management practices, structured interviews were conducted with production managers at various onshore seafood processing facilities in Namibia representing about 62% of the onshore seafood processing facilities in Namibia. Some of these companies also process at sea aboard fishing vessels, so we obtained information on offshore processing methods as well to better understand seafood wastage from seafood processing in Namibia. Total landings data for commercially exploited species were also analysed and converted to total catch weight to quantify seafood wastage. The majority (52.6%) of the surveyed processing facilities process hake as their target species. Monkfish processing facilities were found to have the highest proportion of waste (65.5%). Seafood processing facilities generated approximately 71 176.13 t (15.2%) of waste per weight of landed products in 2018. Gonads and heads of fish were the most common parts which were not processed into value-added products and were hence the main contributors as seafood waste. Survey results indicated that the bulk of Namibian seafood processing facilities (63.2%) do not process their seafood waste. Reasons for not processing seafood waste in Namibia include prolonged fishing days, especially on freezer vessels that spent 40 days at sea on average and process the catches at sea; inadequate storage facilities aboard the fishing vessels; lack of seafood waste processing equipment and expertise at both onshore and offshore facilities; and limited demand for products that would be generated from seafood waste. This study provides insight into seafood wastage in Namibia, particularly quantities of wastage and waste composition, as well as reasons for seafood waste generation.

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纳米比亚海产品废弃物产生的评估和量化

摘要 由于对海产品的需求不断增加，海产品对环境的负面影响及其对海洋保护和政策的影响，海产品废物问题在全球范围内受到关注。这项研究调查了纳米比亚的海产品废物，该国拥有大型商业渔业，但海产品废物的基线数据有限。为了深入了解海产品浪费和废物管理实践，对纳米比亚各种陆上海产品加工设施的生产经理进行了结构化访谈，约占纳米比亚陆上海产品加工设施的 62%。其中一些公司也在渔船上进行海上加工，因此我们获得了有关海上加工方法的信息，以更好地了解纳米比亚海产品加工过程中的海产品浪费。还分析了商业开发物种的总上岸量数据并将其转换为总捕捞重量，以量化海产品的浪费。大多数（52.6%）被调查的加工设施将鳕鱼作为其目标物种。安康鱼加工设施的废物比例最高（65.5%）。2018 年，海鲜加工设施每重量上岸产品产生约 71 176.13 吨（15.2%）废物。性腺和鱼头是最常见的部分，未加工成增值产品，因此是海鲜废物的主要贡献者. 调查结果表明，大部分纳米比亚海鲜加工设施 (63.2%) 不处理其海鲜废物。纳米比亚不处理海鲜废物的原因包括捕鱼天数延长、特别是在平均在海上停留 40 天并在海上处理渔获物的冷冻船；渔船上的储存设施不足；陆上和海上设施缺乏海鲜废物处理设备和专业知识；以及对由海鲜废物产生的产品的需求有限。这项研究提供了对纳米比亚海鲜浪费的深入了解，特别是浪费的数量和废物成分，以及产生海鲜废物的原因。