Data for: A generalised volumetric method to estimate the biomass of photographically surveyed benthic megafauna

Standing stocks of biomass and biovolume as directly and indirectly estimated from photographs using a length-weight relationship (LWR) approach and a generalised volumetric method (GVM). The datasets correspond to: - the fresh trawl-caught specimens from the Porcupine Abyssal Plain Sustained Observatory (PAP-SO; 4850m water depth, northeast Atlantic); - the case study of benthic ecology based on a large photographic dataset derived from AUV surveys on the Celtic Shelf (100 m water depth, northeast Atlantic); - the inter-operator variation assessment of biomass and biovolume estimation using the LWR method and the GVM.采用长度-重量关系（length-weight relationship, LWR）方法与广义体积法（generalised volumetric method, GVM），通过照片直接与间接估算得到的生物量与生物体积现存量数据集。 本数据集涵盖以下三类内容： - 豪猪深渊平原持续观测站（Porcupine Abyssal Plain Sustained Observatory, PAP-SO；水深4850米，大西洋东北部）的新鲜拖网捕获标本； - 基于凯尔特陆架（水深100米，大西洋东北部）自主水下航行器（Autonomous Underwater Vehicle, AUV）调查所得的大型照片数据集开展的底栖生态学案例研究； - 采用LWR方法与GVM开展的生物量与生物体积估算的操作者间变异评估。