Taylor N G H, Sommerville C, Wootten R
Institute of Aquaculture, University of Stirling, Stirling, UK.
J Fish Dis. 2006 Apr;29(4):193-200. doi: 10.1111/j.1365-2761.2006.00704.x.
Problem infections caused by species of the crustacean ectoparasite, Argulus, in UK stillwater trout fisheries appear to have increased in recent years. A cross-sectional study of 77 such fisheries was conducted to establish the perceived problem and the extent and severity of this problem, and to identify associated risk factors. An interview-based study was conducted in 2001 using a standardized questionnaire based on the management and infection status of each fishery in the previous year. Logistic regression was used to identify potential risk factors. Argulus spp. were perceived to cause economic losses in infected fisheries through a reduction in the number of anglers due to reduced aesthetic appeal and catchability of fish. Of the sites studied, 29% experienced such a problem infection in 2000. Argulus foliaceus was identified in all but one case and was found to be widely distributed throughout the UK. The remaining case was identified as Argulus coregoni. Three risk factors were associated with problem infections: the presence of an algal bloom, slow rates of stock turnover and whether water level dropped by <1 m during the summer months.
近年来，在英国静水鳟鱼养殖场，甲壳类体外寄生虫多子小瓜虫属引发的问题感染似乎有所增加。对77个此类养殖场进行了一项横断面研究，以确定所察觉到的问题以及该问题的范围和严重程度，并识别相关风险因素。2001年开展了一项基于访谈的研究，使用了一份基于前一年每个养殖场的管理和感染状况的标准化问卷。采用逻辑回归来识别潜在风险因素。多子小瓜虫属被认为会导致受感染养殖场出现经济损失，原因是鱼的美观度下降和可捕性降低，从而使垂钓者数量减少。在所研究的场地中，29%在2000年经历了此类问题感染。除一例之外，所有病例均鉴定为叶状多子小瓜虫，且发现其在英国广泛分布。其余病例鉴定为河鲈多子小瓜虫。有三个风险因素与问题感染相关：藻类大量繁殖、鱼苗周转率低以及夏季水位下降是否小于1米。
