Fogel Deborah, Fuentes José Luis, Soto Luz Marina, Lafuente Wilson, Moncayo-Estrada Rodrigo, López Carlos
Programa de Maestría en Ciencias Biológicas, mención Ecología Acuática, División de Estudios para Graduados, Facultad Experimental de Ciencias, Universidad del Zulia, Maracaibo, Venezuela.
Centro Regional de Investigaciones Ambientales, Universidad de Oriente, Venezuela.
Int J Parasitol Parasites Wildl. 2017 Oct 6;6(3):344-348. doi: 10.1016/j.ijppaw.2017.10.001. eCollection 2017 Dec.
We analyzed the infestation of the attached copepod species sp on a wild population of . The infestation and occurrence of attached copepods were related to body size, maturity and sex of host and the presence of lesions on fish skin were described. In 61 fish specimens (37 males and 24 females), total of 218 ectoparasitic copepods, including 204 mature and 14 immature stages were found. Copepods were attached to different regions of fish body without any regular pattern. The prevalence of infestation was 80.3% and intensity between 1 and 15 copepods/fish. No significant differences were found between sex or maturity and the presence of attached sp. However, a contingency table including both sex and maturity status, and the total number of attached copepod per combined category showed a significant association. A positive correlation was found between body length of fish and intensity of infestation. Similarly, when comparing the infested fish according to group size, we found more copepods on larger individual. Attached copepods were associated with the presence of lesions visible to the naked eye. Histological analyses showed changes in cell architecture when sections of copepod-free tissues and attached copepods were compared.
我们分析了附着在野生种群上的桡足类物种sp的感染情况。描述了附着桡足类的感染情况和发生情况与宿主的体型、成熟度和性别之间的关系，以及鱼皮肤上病变的存在情况。在61个鱼类标本（37只雄性和24只雌性）中，共发现218只体外寄生桡足类，包括204个成熟阶段和14个未成熟阶段。桡足类附着在鱼体的不同部位，没有任何规律。感染率为80.3%，感染强度为每只鱼1至15只桡足类。在性别或成熟度与附着sp的存在之间未发现显著差异。然而，一个包括性别和成熟状态以及每个组合类别中附着桡足类总数的列联表显示出显著的关联。发现鱼的体长与感染强度之间存在正相关。同样，当根据群体大小比较受感染的鱼时，我们发现较大个体上的桡足类更多。附着的桡足类与肉眼可见的病变有关。组织学分析表明，当比较无桡足类组织切片和附着桡足类的切片时，细胞结构发生了变化。
