Ecotoxicology and Parasitology Unit, Department of Zoology, University of Lagos, Lagos, Nigeria.
Fisheries and Aquaculture Unit, Department of Marine Sciences and Fisheries, University of Lagos, Lagos, Nigeria.
Bull Environ Contam Toxicol. 2020 Feb;104(2):222-227. doi: 10.1007/s00128-019-02769-w. Epub 2020 Jan 1.
This paper assesses the role of intestinal helminth parasite of Macrobrachium vollenhovenii on host metal accumulation in Lekki lagoon, Lagos, Nigeria. Lead, zinc, copper, chromium and iron concentrations were determined in water, sediment, intestinal parasite, intestine of infected and non-infected prawns. Intestinal nematode parasite Cucullanus sp. was identified. Pb and Cr were not detected in the water and sediment. The sediment had higher concentrations of the metals than the water medium, and exceeded the WHO limits for Zn, Cu and Fe. Cucullanus sp. accumulated Zn 19 times, Cr several thousand times more and Fe 11 times more than the host intestine (wet wt). This parasite could have accumulated these metals from its host, reducing the concentration of these metals in the tissues of the infected prawns compared to non-infected ones. The infected and non-infected prawns accumulated Zn and Fe several times more than the water medium. The parasite influenced metal accumulation in the host tissue and pose ecological risk.
本文评估了罗氏沼虾肠道寄生蠕虫对尼日利亚拉各斯莱基泻湖宿主金属积累的影响。在水中、沉积物、肠道寄生虫、感染和未感染对虾的肠道中测定了铅、锌、铜、铬和铁的浓度。鉴定出肠道线虫寄生虫 C. sp.。水和沉积物中未检测到 Pb 和 Cr。沉积物中金属浓度高于水介质，超过了世卫组织对 Zn、Cu 和 Fe 的限量标准。C. sp. 积累的 Zn 是宿主肠道的 19 倍，Cr 是宿主肠道的数千倍，Fe 是宿主肠道的 11 倍。这种寄生虫可能从宿主那里积累了这些金属，从而降低了感染对虾组织中这些金属的浓度，与未感染的对虾相比。感染和未感染的对虾积累的 Zn 和 Fe 是水介质的数倍。寄生虫影响宿主组织中的金属积累，构成生态风险。
