The Tasmanian abalone fishery represents the largest wild abalone resource in the world, supplying close to 25% of the annual wild-caught global harvest. Prompted by the need to manage Paralytic Shellfish Toxin (PST) contamination of Blacklip Abalone (Haliotis rubra rubra) from east coast Tasmania, the uptake of toxins by this species is investigated in a land-based, controlled aquaculture setting. Abalone were exposed to either live Alexandrium catenella microalgal cultures or PST contaminated feed pellets during a 28 day exposure period and toxins quantified in viscera, foot muscle and epipodium tissues. PST profiles of abalone foot tissues were dominated by saxitoxin and neosaxitoxin, whilst viscera more closely resembled those of the toxin source (A. catenella cells rich in gonyautoxin 1&4 and 2&3 or feed pellets containing A. catenella extracts rich in these analogues). This indicates direct uptake of PST in the viscera via browsing/grazing on the pellet and /or sedimented microalgal cells. After exposure to A. catenella cell culture, PST concentrations in the foot (muscle + epipodium) were on average 8 times higher than in the viscera. Higher toxicity of foot tissue was caused by higher PST content of the epipodium (up to 1,085 µg STX.2HCl equiv. kg⁻¹), which despite its small contribution to total animal weight significantly added to the overall toxin burden. Higher PST levels in the abalone foot suggest that toxin monitoring programmes may not need to routinely analyse both foot and viscera, potentially allowing for a 50% reduction of analytical costs. This option is being further investigated with continuing field studies.

塔斯马尼亚鲍鱼捕捞业是世界上最大的野生鲍鱼资源，占全球每年野生捕捞量的近25％。由于需要管理塔斯马尼亚东海岸的黑唇鲍鱼（Haliotis rubra rubra）的麻痹性贝类毒素（PST）污染，需要在陆上可控水产养殖环境中研究该物种对毒素的吸收。在28天的暴露期内，鲍鱼暴露于亚历山大藻（Alexanderen）链状微藻培养物或受PST污染的饲料颗粒中，内脏，足部肌肉和上皮组织中的毒素定量。鲍鱼足组织的PST分布主要由沙门毒素和新萨克毒素引起，而内脏则更类似于毒素来源的那些（A. catenella富含gonyautoxin 1＆4和2＆3的细胞，或含有富含这些类似物的链状曲霉提取物的饲料颗粒。这表明通过浏览/放牧沉淀和/或沉淀的微藻细胞可直接摄取内脏中的PST。暴露于链霉菌细胞培养物后，足部（肌肉+上皮）的PST浓度平均比内脏高8倍。足部组织的PST含量较高（足至1,085 µg STX.2HCl当量kg ^-1），导致足部组织毒性更高，尽管它对动物总重量的贡献很小，但明显增加了总毒素负担。鲍鱼脚中较高的PST水平表明毒素监测程序可能不需要常规分析脚和内脏，有可能将分析成本降低50％。正在继续进行实地研究，进一步研究此选项。