Development of benthic components within integrated multi-trophic aquaculture (IMTA) systems warrants more attention, and the development of polychaetes as an extractive component in IMTA systems is ongoing. This study estimates the bioremediation potential of Capitella sp. and Ophryotrocha craigsmithi for coupled and decoupled salmon-driven IMTA. In coupled IMTA, polychaetes receive fresh faeces, while in decoupled IMTA, preservation of faeces is applied. Respiration and ammonia excretion rates were measured for polychaetes fed fresh, oven-dried or acidified salmon faeces, and combined with nutrients incorporated into tissue growth, to estimate nutrient requirements. Nutrient requirements were subsequently used to evaluate bioremediation potential. Metabolic rates were highest for O. craigsmithi and contributed notably to their overall nutrient requirement (20-30%). For the 2 polychaete species, nutrient requirements ranged from 5 to 26 mg C and from 2 to 6 mg N g-1 AFDW d-1. These requirements were comparable with or higher than other polychaete species, highlighting the potential for fish waste bioremediation by Capitella sp. and O. craigsmithi. Preserved diets reduced bioremediation potential 1.5 and 3-5 times for, respectively, Capitella sp. and O. craigsmithi. Assuming that polychaetes are efficient fish-faeces convertors, the bioremediation potential indicates that benthic cultivation units containing 65000-95000 ind. m-2 of Capitella sp. or 36000-194000 ind. m-2 of O. craigsmithi can convert the daily organic waste flux deposited below an average salmon farm. These densities were within ranges reported for wild populations, indicating that, based on the bioremediation potential, development of benthic IMTA with these 2 polychaete species seems realistic and efficient for waste conversion.

中文翻译：

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多毛类在（去）耦合综合水产养殖中的应用：一种鱼类废物生物修复方法

综合多营养水产养殖 (IMTA) 系统内底栖成分的开发值得更多关注，多毛类作为 IMTA 系统中提取成分的开发正在进行中。这项研究估计了 Capitella sp. 的生物修复潜力。和 Ophryotrocha craigsmithi 用于耦合和解耦鲑鱼驱动的 IMTA。在耦合的 IMTA 中，多毛类接受新鲜的粪便，而在分离的 IMTA 中，应用了粪便的保存。测量以新鲜、烘干或酸化鲑鱼粪便喂养的多毛类动物的呼吸和氨排泄率，并结合组织生长中的营养物质，以估计营养需求。随后使用营养需求来评估生物修复潜力。O 的代谢率最高。craigsmithi 并显着增加了它们的整体营养需求（20-30%）。对于 2 个多毛类物种，营养需求范围为 5 至 26 毫克 C 和 2 至 6 毫克 N g-1 AFDW d-1。这些要求与其他多毛类物种相当或更高，突出了 Capitella sp. 对鱼类废物生物修复的潜力。和 O.克雷格史密斯。保存饮食对 Capitella sp. 的生物修复潜力分别降低了 1.5 倍和 3-5 倍。和 O.克雷格史密斯。假设多毛类是有效的鱼粪转化器，生物修复潜力表明底栖养殖单位包含 65000-95000 印度。Capitella sp. 的 m-2。或 36000-194000 ind。O. craigsmithi 的 m-2 可以转换沉积在普通鲑鱼养殖场以下的每日有机废物通量。