Department of Zoology, University of Johannesburg, Kingsway Campus, P.O. Box 524, Auckland Park, Johannesburg, 2006 South Africa.
Onderstepoort J Vet Res. 2009 Jun;76(2):227-34.
This study describes the distribution and aspects of the ecology of Lamproglena hoi. Bushveld small-scale yellowfish, Labeobarbus polylepis (Boulenger, 1907) were collected during June 2006 from the Phongolo and Assegaai rivers, March 2005 and October 2006 from the Elands River, and January 2007 and June 2008 from the Komati River in Mpumalanga, South Africa and examined for the presence of parasites. Lamproglena hoi specimens were collected from the gill filaments of the host. Specimens were fixed with warm AFA (alcohol-formaldehyde-acetic acid) and preserved in 70% ethanol. The identification of parasites took place in the laboratories of the University of Johannesburg. Twenty-five copepods (prevalence 21%, mean intensity = 4.17, abundance = 0.86) were collected on 29 fish in the Phongolo River and 46 copepods (prevalence 40%, mean intensity = 3.83, abundance = 1.53) were collected on 30 fish in the Assegaai River. One hundred and sixty eight copepods (prevalence 52%, mean intensity = 12.92, abundance = 6.72) were collected on 25 fish in 2005, and 527 copepods (prevalence 95%, mean intensity = 27.74, abundance = 26.35) were collected on 20 fish in the Elands River. One hundred and sixteen copepods (prevalence 75%, mean intensity = 7.73, abundance = 5.80) were collected on 20 fish in 2007, and 273 copepods (prevalence 63%, mean intensity = 16.06, abundance = 10.11) were collected on 27 fish in 2008 in the Komati River. Labeobarbus polylepis from these four rivers was found to have a relatively high L. hoi infection. Inseminated L. hoi females (immature) attach to the host in winter and their ovaries become conspicuous (mature). In spring fertilized eggs are stored in egg sacs hanging from the body (gravid), indicating that fertilized eggs start to hatch in spring and continued hatching into summer. Parasites prefer the median part of the second gill arch for attachment. No correlation exists between the number of parasites recorded on the gills and the sizes (total lengths) of yellowfish sampled.
本研究描述了 Lamproglena hoi 的分布和生态学方面。2006 年 6 月，从南非姆普马兰加省的 Phongolo 和 Assegaai 河流、2005 年 3 月和 2006 年 10 月从 Elands 河流以及 2007 年 1 月和 2008 年 6 月从 Komati 河流采集 Bushveld 小型黄鲈（Labeobarbus polylepis）样本，检查寄生虫的存在。从宿主的鳃丝中采集 Lamproglena hoi 标本。标本用温暖的 AFA（酒精-甲醛-乙酸）固定，保存在 70%乙醇中。寄生虫的鉴定在约翰内斯堡大学的实验室进行。在 Phongolo 河的 29 条鱼上采集了 25 只（流行率 21%，平均强度=4.17，丰度=0.86），在 Assegaai 河的 30 条鱼上采集了 46 只（流行率 40%，平均强度=3.83，丰度=1.53）。在 2005 年的 25 条鱼上采集了 168 只（流行率 52%，平均强度=12.92，丰度=6.72），在 20 条鱼上采集了 527 只（流行率 95%，平均强度=27.74，丰度=26.35）在 Elands 河。在 2007 年的 20 条鱼上采集了 116 只（流行率 75%，平均强度=7.73，丰度=5.80），在 2008 年的 27 条鱼上采集了 273 只（流行率 63%，平均强度=16.06，丰度=10.11）在 Komati 河。来自这四条河流的 Labeobarbus polylepis 被发现具有相对较高的 L. hoi 感染。受感染的 Lamproglena hoi 雌性（未成熟）在冬季附着在宿主上，其卵巢变得明显（成熟）。在春季，受精卵储存在悬挂在身体上的卵囊中（怀孕），表明受精卵在春季开始孵化，并持续孵化到夏季。寄生虫更喜欢附着在第二鳃弓的中间部分。记录在鳃上的寄生虫数量与采样黄鲈的大小（总长度）之间没有相关性。
