Muzzall P M
Department of Zoology, Michigan State University, East Lansing 48824, USA.
J Parasitol. 1995 Jun;81(3):498-9.
Myxobolus scleroperca infected the sclerotic cartilage of 26 of 100 yellow perch (Perca flavescens) examined in August-September 1991 from the Indiana waters of southern Lake Michigan. The mean lengths of infected and uninfected fish were 171 mm and 148 mm, respectively. A significantly higher percentage of female fish were infected than male because more larger females were examined than males. Perch less than 94 mm were not infected, indicating that the parasite is not evenly distributed in the host population, preferring larger (older) fish. An alternative explanation that should be considered is that young fish die from this infection. Yellow perch collected from eastern Lake Michigan in 1990 and from Saginaw Bay, Lake Huron in 1991 were not infected with M. scleroperca, indicating that the parasite has a patchy distribution among perch populations of the Great Lakes.
1991年8月至9月间，在密歇根湖南部印第安纳水域对100条黄鲈（Perca flavescens）进行检查，其中26条的硬化软骨被粘孢子虫（Myxobolus scleroperca）感染。受感染和未受感染鱼的平均体长分别为171毫米和148毫米。感染雌鱼的比例显著高于雄鱼，因为检查的较大雌鱼比雄鱼多。体长小于94毫米的鲈鱼未被感染，这表明该寄生虫在宿主种群中分布不均，更喜欢较大（年龄更大）的鱼。另一种应考虑的解释是幼鱼死于这种感染。1990年从密歇根湖东部以及1991年从休伦湖萨吉诺湾采集的黄鲈未感染粘孢子虫，这表明该寄生虫在五大湖鲈鱼种群中分布不均。
