Calcium oxide (CaO) is being considered as a possible treatment for both the control of echinoderm populations and the treatment against sea lice infestation in Norwegian salmon farms. CaO particles produce an exothermal reaction when in contact with water, which can cause epidermal burns and lesions to certain target organisms leading to death. The aim of the present study was to determine the effects of fine (<0.8 mm) and coarse (<2.5 mm) CaO particles to a range of marine species from different taxonomic groups: two echinoderms (Asterias ruben and Strongylocentrotus droebachiensis); two crustaceans (Carcinus maenas and Tisbe battagliai); two molluscs (Mytilus edulis and Hinia reticulata); a polychaete (Nereis pelagica); a fish (Cyclopterus sp.); and seaweed germlings (Fucus vesiculosus). Overall, the fine CaO particles were more toxic to the selected marine species than the coarse particles. Coarse CaO particle effects were only observed in four of the nine species tested (A. rubens, S. droebachiensis, N. pelagica, T. battagliai) with similar LC₅₀ values between 207 and 268 g/m². For the fine CaO particles, the lowest LC₅₀ was for the epibenthic copepod (T. battagliai) at 3.14 g/m², followed by the sea urchin (20.1 g/m²), starfish (22.2 g/m²), ragworm (29.6 g/m²), and netted dog whelk (41.9 g/m²). Lump sucker fish exhibited significant mortalities only at the highest fine CaO concentration tested (320 g/m²) and recorded an LC₅₀ of 226 g/m². The toxicity data were used to generate species sensitivity distributions (SSDs) for both fine and coarse CaO particles. The hazard concentrations for 5% of the species (HC5) calculated from the SSDs, based on NOEC values, for the coarse and fine particles were 35.5 and 1.5 g/m² respectively. Using a recommended assessment factor of 5, the Predicted No Effect Concentration (PNEC) was calculated as 7.1 and 0.3 g/m² for coarse and fine CaO particles respectively.

在挪威鲑鱼养殖场中，氧化钙（CaO）被认为是控制棘皮动物数量和防治海虱侵袭的一种可能方法。CaO颗粒与水接触时会产生放热反应，这可能引起表皮灼伤和某些目标生物的损伤，从而导致死亡。本研究的目的是确定细的（<2.5 MM）的CaO颗粒的影响（<0.8毫米），向粗的范围内不同分类组的海洋物种：二棘皮类动物（罗氏的Ruben和海胆droebachiensis）; 两个甲壳类动物（Carcinus maenas和Tisbe battagliai）；两个软体动物（可食用的Mytilus edulis和Hinia reticulata）; cha（Nereis pelagica）；鱼（Cyclopterus sp。）；和海藻苗（Fusus vesiculosus）。总体而言，CaO细颗粒对选定海洋物种的毒性大于粗颗粒。粗的CaO粒子效果只在九个测试物种的四（观察A.鲁，S. droebachiensis，N. pelagica，Ť。battagliai）具有类似的LC _50个207和268克/平方米之间的值²。为细颗粒的CaO，最低LC ₅₀是用于底栖桡足类（Ť。battagliai）3.14克/米²，然后是海胆（20.1 g / m ²），海星（22.2 g / m ²）、,虫（29.6 g / m ²）和网状狗须（41.9 g / m ²）。仅在测试的最高细CaO浓度（320 g / m ²）下，块状er鱼才显示出明显的死亡率，并且记录的LC ₅₀为226 g / m ²。毒性数据用于生成细和粗CaO颗粒的物种敏感度分布（SSD）。根据NOEC值，根据固态驱动器计算得出的5％和5％的有害物质浓度（HC5），粗颗粒和细颗粒分别为35.5和1.5 g / m ²分别。使用建议的评估系数5，对于粗和细CaO颗粒，预测的无效应浓度（PNEC）分别计算为7.1和0.3 g / m ²。