DIFFERENCES IN THE HOST-RESISTANCE OF ATLANTIC SALMON, SALMO-SALAR L, STOCKS TO THE MONOGENEAN GYRODACTYLUS-SALARIS MALMBERG, 1957
DIFFERENCES IN THE HOST-RESISTANCE OF ATLANTIC SALMON, SALMO-SALAR L, STOCKS TO THE MONOGENEAN GYRODACTYLUS-SALARIS MALMBERG, 1957
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DOI：
10.1111/j.1095-8649.1990.tb05890.x
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发表时间：
1990-10-01
影响因子：
2
通讯作者：
HANSEN, LP
中科院分区：
文献类型：
--
作者：
BAKKE, TA;JANSEN, PA;HANSEN, LP
研究了原产于涅瓦河(苏联，波罗的海)、阿尔塔河(挪威北部)和隆河(挪威西部)(均为东大西洋)的孵化养殖场鲑鱼对挪威沙拉里斯回龙的敏感性和抵抗力。对这种寄生虫的抵抗力水平是通过对麻醉后的鲑鱼进行计数来评估的，这些计数是在最初的试验性接触(2周)感染沙门氏菌的鲑鱼后进行的。进行了三个实验，均在12℃的水中进行：(1)50Alta和50 Neva鲑鱼，初始平均寄生强度约为12；(2)50 Lone和50 Neva三文鱼，初始平均寄生强度约为60；(3)单独分离的10条Lone和10 Neva鲑鱼，初始强度为1妊娠G.Salaris。在这两个挪威鲑鱼种群中，在5周的试验期内，沙拉里斯鲑鱼基础种群稳步增加，而涅瓦鲑鱼种群显著下降：(实验1)第3周，平均峰值强度为32.6；(实验1)2)第2周，平均峰值强度为58.7；3)第3周，平均峰值强度为6.3。孵化场饲养的波罗的海涅瓦鲑鱼种群显示出对G.Salaris的先天和后天抵抗力，与高度敏感的挪威Alta和Lone鲑鱼种群形成对比。
The susceptibility and resistance of hatchery-reared salmon parr, native to the rivers Neva (U.S.S.R., Baltic Sea), Alta (northern Norway) and Lone (western Norway) (both eastern Atlantic Ocean), to Gyrodactylus salaris from Norway, was examined. The level of resistance to the parasite was assessed from counts, made on anaesthetized salmon, of the numbers of G. salaris after an initial experimental exposure (2 weeks) to G. salaris-infected salmon. Three experiments, all in water at c. 12.degree.C, were carried out: (1) 50 Alta and 50 Neva salmon, initial mean parasite intensity c. 12; (2) 50 Lone and 50 Neva salmon, initial mean parasite intensity c. 60; (3) 10 Lone and 10 Neva salmon individually isolated, initial intensity one gravid G. salaris. In both the Norwegian salmon stocks, the G. salaris infrapopulations steadily increased during the experimental period of 5 weeks, in contrast to a prominent decline in the Neva salmon stock, after, respectively: (Exp 1) week 3, average peak intensity 32.6; (Exp. 2) week 2, average peak intensity 58.7; and (Exp. 3) week 3, average peak intensity 6.3. The hatchery-reared Baltic Neva stock demonstrated both an innate and an acquired resistance towards G. salaris in contrast to the highly susceptible, Norwegian Alta and Lone salmon stocks.