Faculty of Agrotechnology and Food Science (FASM), Universiti Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia.
Vet Parasitol. 2012 Jul 6;187(3-4):505-10. doi: 10.1016/j.vetpar.2012.02.003. Epub 2012 Feb 27.
Snapper had been cultured in Malaysia since 1980 due to the fry availability and the high demand. However, details on the caligids infestation were not properly documented. This study was carried out to determine the prevalence, mean intensity and site preference of Caligus rotundigenitalis (Caligidae, Siphonostomatoida) a parasitic copepod on cage cultured crimson snapper, Lutjanus erythropterus from Bukit Tambun, Penang, Malaysia. A total of 70 specimens of cultured snapper were examined based on different infestation sites such as head, body as well as operculum. The specimens were separated into three groups according to the size of the fish. C. rotundigenitalis was found to be the only species infesting L. erythropterus with the prevalence and the mean intensity of 81.4% and 5.6±4.4, respectively. There was a significant difference between the prevalence of site infestation of the body and inner operculum sites. The prevalence of C. rotundigenitalis was highest on inner operculum of the fish followed by the body and head. However, there was no significant difference in the distribution of C. rotundigenitalis over the different infestation sites derived from the three groups. The information obtained from this study can be used for more effective control measures of ectoparasitic copepod infestation in floating cages.
自 1980 年以来，由于鱼苗的供应和高需求，马来西亚一直在养殖尖吻鲈。然而，关于桡足类寄生虫感染的细节并没有得到妥善记录。本研究旨在确定马来西亚槟城武吉淡汶笼养红鲷鱼（Lutjanus erythropterus）上寄生桡足类 Caligus rotundigenitalis（Caligidae，Siphonostomatoida）的流行率、平均强度和部位偏好。根据头、身体和鳃盖等不同感染部位，共检查了 70 个养殖尖吻鲈标本。根据鱼的大小将标本分为三组。结果发现，只有 C. rotundigenitalis 感染 L. erythropterus，其流行率和平均强度分别为 81.4%和 5.6±4.4。身体和内鳃盖部位感染的流行率有显著差异。C. rotundigenitalis 在鱼的内鳃盖的感染率最高，其次是身体和头。然而，来自三组的不同感染部位的 C. rotundigenitalis 的分布没有显著差异。本研究获得的信息可用于更有效地控制浮式网箱中桡足类寄生虫的感染。
