Brown J, Brickle P, Scott B E
Falkland Islands Government Fisheries Department, PO Box 598, Stanley, Falkland Islands.
J Helminthol. 2013 Dec;87(4):501-9. doi: 10.1017/S0022149X12000636. Epub 2012 Oct 25.
The parasite fauna of juvenile Dissostichus eleginoides, while they inhabit the Falkland's shelf, was examined, giving new detailed information on spatial, ontogenic and seasonal variations. A total of 24,943 parasites from 15 different taxa were found in the stomach of 502 individual fish. Parasite species composition and abundance allowed separation of toothfish by area between the north-west and south-east of the Falklands. The digenean, Elytrophalloides oatesi, and the nematodes, Hysterothylacium spp. and Anisakis spp., were the most common, all with a prevalence >20%. For some seasons ontogenic changes in abundance were significant in these three parasite taxa, and this is discussed in terms of ontogenic and seasonal changes in diet. Elytrophalloides oatesi and Hysterothylacium spp. showed spatial and seasonal differences in abundance with greater numbers in the warmer waters of the north-west and during the summer months. Differences in abundance of E. oatesi between the Falklands and other regions indicate its potential for use as a biological tag to study toothfish movements and population structure; however, more seasonal data would be required before this technique could be used.
对栖息在福克兰群岛陆架的小鳞犬牙南极鱼幼鱼的寄生虫群落进行了研究，获得了有关空间、个体发育和季节变化的新的详细信息。在502条个体鱼的胃中总共发现了来自15个不同类群的24943个寄生虫。寄生虫的种类组成和丰度使得能够根据福克兰群岛西北部和东南部之间的区域对南极犬牙鱼进行区分。复殖吸虫奥氏艾氏吸虫以及线虫属的后圆线虫和异尖线虫最为常见，其感染率均>20%。在某些季节，这三种寄生虫类群的丰度个体发育变化显著，本文根据饮食的个体发育和季节变化对此进行了讨论。奥氏艾氏吸虫和后圆线虫在丰度上表现出空间和季节差异，在西北部较温暖的水域以及夏季数量更多。福克兰群岛与其他地区之间奥氏艾氏吸虫丰度的差异表明其有可能作为一种生物学标记来研究南极犬牙鱼的洄游和种群结构；然而，在使用这项技术之前还需要更多的季节数据。
