Journal ArticleDOI
Influence of cadmium exposure on the incidence of first intermediate host encystment by Echinoparyphium recurvatum cercariae in Lymnaea peregra.
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The effect of cadmium exposure of the snail first intermediate host Lymnaea peregra on the incidence of encystment of Echinoparyphium recurvatum cercariae without emergence from the snail was investigated and there was metal accumulation within their body tissues.Abstract:
The effect of cadmium exposure of the snail first intermediate host Lymnaea peregra on the incidence of encystment of Echinoparyphium recurvatum (Digenea: Echinostomatidae) cercariae without emergence from the snail was investigated. Exposure to 100 microg l(-1) Cd for 72 h caused a significant increase in the incidence of first host encystment when compared to controls. In addition, autometallographic staining of E. recurvatum daughter rediae and developing cercariae showed that there was metal accumulation within their body tissues. The significance of these findings to parasite transmission in metal-polluted environments is discussed.read more
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Pollution and parasitism in aquatic animals: a meta-analysis of effect size.
Christopher A. Blanar,Kelly R. Munkittrick,Jeff E. Houlahan,Deborah L. MacLatchy,David J. Marcogliese +4 more
TL;DR: This meta-analysis represented a first attempt to consider the size of the effect of pollution on parasites, and highlighted the potential of susceptible parasite taxa, communities, and functional groups for use in the biological assessment of pollution.
Journal ArticleDOI
Interactive effects of infectious diseases and pollution in aquatic molluscs
TL;DR: The present article reviews the interactive effects of viral, bacterial, protozoan, and trematode infections with toxic pollutants on aquatic molluscs and the interactions between pollution and other less well studied infectious diseases are considered.
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Pollutant-induced effects on immunological and physiological interactions in aquatic host -trematode systems: implications for parasite transmission
TL;DR: The effects of pollutants on the immunology and physiology in both vertebrate and molluscan host–trematode systems and the implications for parasite transmission are reviewed.
Journal ArticleDOI
How life history contributes to stress response in the Manila clam Ruditapes philippinarum.
TL;DR: Sensitivity of Manila clams to both stressors differed from one site to another, suggesting local adaptation of populations, and it is important to be cautious when extrapolating results from field studies of one species and one site, if the life history of the organisms is not taken into account.
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The effects of host size and temperature on the emergence of Echinoparyphium recurvatum cercariae from Lymnaea peregra under natural light conditions.
TL;DR: Analysis of emergence using the Q10 value, a measure of physiological processes over temperature ranges, showed that between 10 and 21°C Q10 values exceeded 100 for all snail size classes, indicating a substantially greater emergence than would be expected for normal physiological rates.
References
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Free-living endohelminth stages: at the mercy of environmental conditions
TL;DR: This overview examines the effects of natural variables and pollutants on two specific properties of free-living stages of endohelminths, mainly trematodes, while fully recognizing that other parasitic life history stages in addition to the hosts can also be affected.
Journal ArticleDOI
Trematode life cycles: short is sweet?
Robert Poulin,Thomas H. Cribb +1 more
TL;DR: It is shown that life cycle truncation has evolved independently many times in the phylogeny of trematodes, and the study of shorter life cycles offers an opportunity to understand the forces shaping the evolution of life cycles in general.
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Pollution toxicity to the transmission of larval digeneans through their molluscan hosts.
TL;DR: It is apparent from these studies that the influence of pollutants on digenean transmission is highly complex with much of the observed effects in the laboratory often masked by a complexity of other factors in the field.
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Autometallography: Tissue metals demonstrated by a silver enhancement kit
TL;DR: In the present study a silver enhancement kit, primarily intended for the amplification of colloidal gold particles, has been used to demonstrate these catalytic tissue metals.
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Trace metals in waters and sediments of the river tawe, South Wales, in relation to local sources
C.M.G. Vivian,K.S. Massie +1 more
TL;DR: The concentrations and distribution of cadmium, cooper, nickel, lead and zinc have been studied in a small river and its estuary in South Wales as discussed by the authors, where the river drains the Lower Swansea Valley, an area severely contaminated by smelting and other industries over the last 250 years.