尼日利亚尼日尔三角洲潮汐淡水水体中黑斑蝶的内寄生

U. Arinze, F. Sikoki, S. Nzeako
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引用次数: 3

摘要

从新喀拉巴河随机选取黑斑蝶100只,测定大小和性别对血液、心、肝、肾和胃肠道内寄生率的影响。采用甲醚浓度法对样品进行检测。数据显示,总体寄生虫血症为18例(18.0%)。尺寸级为301 ~ 400mm、201 ~ 300mm和>169 ~ 200mm的种群分别有5只(55.6%)、12只(15.2%)和1只(11.1%),而尺寸级为0.05的种群中雌虫有11只(20.4%),雄虫有7只(15.2%)。部位特异性内寄生血症显示,胃肠道寄生负荷最高(38.9%),肾脏最低(5.6%)。心脏(33.3%)、血液和肝脏(11.1%)各有寄生负荷。从鱼类样本中检出5门14种寄生虫,分别为:球虫原生动物(Protozoa - Coccidia sp.)和梨状体(Thelohanellus piriformis);扁形蠕虫——子囊囊性脑瘤、血足、血足、无足、Silurotaenia siluri、tetrochus coryphaenae、双髋臼和monentertetraonchus;线虫-圆线虫属;棘头目——lucii棘头目和rutili新棘头目;以及甲壳类动物——Alebion elegans。采样人群的内寄生虫病受水体理化性质的影响,而水体的理化性质受河水潮汐条件下盐分入侵的影响较大。然而,相对较高的胃肠道内寄生率与肠道营养丰富的环境有关,这可能使寄生虫容易建立和繁殖。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Endoparasitaemia of Chrysichthys Nigrodigitatus in a Tidal Freshwater Body in the Niger Delta, Nigeria
One hundred Chrysichthys nigrodigitatus were randomly selected from the New Calabar River to determine the effect of size and sex on the endoparasitaemia in the blood, heart, liver, kidney and Gastro-intestinal tract. The formol-ether concentration method was used to examine the samples. Data revealed an overall parasitaemia of 18 (18.0%). The size classes 301-400mm, 201-300mm and >169-200mm had 5(55.6%), 12(15.2%) and 1(11.1%) respectively while the size class 0.05), however the females had 11(20.4%) and the males had 7(15.2%) of their respective populations. Site specific endoparasitaemia showed that the gastro-intestinal tract harboured the highest (38.9%) parasitic load, while the kidney had the lowest (5.6%). The heart had (33.3%) and the blood and liver had (11.1%) parasitic load each. Fourteen (14) parasite species from 5 phyla were recovered from the fish samples namely: Protozoa - Coccidia sp. and Thelohanellus piriformis; Platyhelminth - Ascocotyle ceolostoma, Sanguinicola inermis, Sanguinicola armata, Atalostropion sp., Silurotaenia siluri, Tetrochetus coryphaenae, Biacetabulum appendiculatum and Tetraonchus monenteron; Nematoda - Strongyloides sp.; Acanthocephala - Acanthocephalus lucii and Neoechinorhynchus rutili; and Crustacea - Alebion elegans. Endoparasitaemia in the sampled population was influenced by the physico-chemical properties of the water body which is greatly affected by the intrusion of salt into the river due to its tidal conditions. However, the relatively high endoparasitaemia in the gastro-intestinal tract was associated with the nutrient rich ambience of the intestine which may allow easy establishment and multiplication of parasites.
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