Sexual differences in the incidence and severity of ectoparasitic infestation of the brown trout, Salmo trutta L.
Sexual differences in the incidence and severity of ectoparasitic infestation of the brown trout, Salmo trutta L.
复制标题
褐鳟 (Salmo trutta L.) 外寄生虫感染的发生率和严重程度存在性别差异。
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
P. Christie
中科院分区：
文献类型：
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作者：
A. D. Pickering;P. Christie
1977年和1978年，在孵化场饲养和野生褐鳟产卵期间，对其皮肤外寄生虫进行了检查。共鉴定出8种寄生虫，包括5种纤毛虫、1种鞭毛虫、1种单系寄生虫和1种寄生真菌，其中多达5种不同的寄生虫出现在一条鱼身上。性成熟的雄鱼比雌雄同体的未成熟鱼和成熟雌鱼更频繁或更严重地受到鱼鳞虫、棘虫、Gyrodactylus和Saprolegnia的侵染。外寄生负荷的差异与已知的表皮产黏液潜力的季节性变化无关。这些发现讨论了硬骨鱼的防御机制和一些内分泌变化，发生在鲑科鱼产卵季节。
Hatchery-reared and wild brown trout, Salmo trutta L., were examined for skin ectoparasites during their spawning period in 1977 and 1978. A total of eight genera of parasites, comprising five ciliates, one flagellate, one monogenean and one parasitic fungus, were identified with as many as five different genera occurring on a single fish. Sexually mature male fish were more frequently or more severely infested by species of Ichthyophthirius, Scyphidia, Gyrodactylus and Saprolegnia than were immature fish of either sex or mature female fish. The differences in ectoparasitic loading could not be correlated with known, seasonal changes in the mucus-producing potential of the epidermis. These findings are discussed in relation to the defence mechanisms of teleost fish and to some of the endocrinological changes that occur in salmonid fish during the spawning season.