Small‐scale fisheries are recognised as making important contributions to nutrition and economic development despite a lack of accurate quantitative information on catches and consumption. While direct measurement remains the most appropriate way of collecting such data, it is impractical at large scales. Instead, household surveys based upon informant recall of fish caught and/or consumed are frequently used. However, the accuracy of weight recall by informants (even over short recall periods) has not been established. Using data from household surveys, the accuracy and precision of catch and consumption estimates derived from: (a) asking informants to recall weights of fish caught and (b) asking respondents to recall lengths of fish caught and converting to weight were tested. Length‐based methods, using visual aids to assist recall, were more accurate, precise and correctable. These methods could be useful for catch estimation, especially where fish are processed, sold or consumed shortly after capture.

中文翻译：

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衡量鱼的捕获量和消费量：基于长度作为替代基于重量的方法的小型渔业实用方法

尽管缺乏关于捕获量和消费量的准确定量信息，但小规模渔业被认为对营养和经济发展做出了重要贡献。虽然直接测量仍然是收集此类数据的最合适方式，但在大规模上是不切实际的。取而代之的是，经常使用基于线人召回捕获和/或消费的鱼的住户调查。然而，线人（即使在很短的召回期内）的体重召回的准确性尚未确定。使用来自家庭调查的数据，对来自以下方面的捕获量和消费量估计的准确性和精确性进行了测试：(a) 要求被调查者回忆捕获的鱼的重量和 (b) 要求受访者回忆捕获的鱼的长度并转换为重量。基于长度的方法，使用视觉辅助工具帮助回忆，更准确、精确和可纠正。这些方法可用于估计产量，特别是在捕获后不久加工、销售或消费鱼类的情况下。