The effect of larval trematodes on the survival rates of two species of mud snails (hydrobiidae) experimentally exposed to desiccation, freezing and anoxia

Jensen, Kaj Frank; Latama, Gunarto; Mouritsen, Kim N.

doi:10.1007/bf02367107

Cited by 30 publications

(25 citation statements)

References 26 publications

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“…Huynh-Feldt correction was used to calculate degrees of freedom for the withinsubjects tests after the production of transmission stages begins. As our results indicate, pathogenic eects of castration may increase host mortality at least at the late stage of infection, which is in accordance with the results of several previous studies (Meuleman 1972;Becker 1980;Lauckner 1986;Sousa and Gleason 1989;Jonsson and Andre 1992;Laerty 1993;Jensen et al 1996).…”

Section: Discussionsupporting

confidence: 94%

“…This may lead to decreased survival of the snail host, at least in extreme environmental conditions (Meuleman 1972;Becker 1980;Lauckner 1986;Sousa and Gleason 1989;Jonsson and Andre 1992;Laerty 1993;Jensen et al 1996;Mouritsen et al 1997). These eects have been reported either for a speci®c host-parasite relationship (Meuleman 1972;Becker 1980;Jonsson and Andre 1992;Jensen et al 1996;Mouritsen et al 1997), or for a whole community of parasite species (Lauckner 1986;Laerty 1993). Additionally, Sousa and Gleason (1989) found that the four most common shedding parasites diered in their level of induced host mortality when the host was stressed in anoxic conditions.…”

Section: Introductionmentioning

confidence: 97%

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Effect of starvation on parasite-induced mortality in a freshwater snail ( Potamopyrgus antipodarum)

Jokela¹,

Lively

Taskinen

et al. 1999

Oecologia

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The level of host exploitation is expected, under theory, to be selected to maximise (subject to constraints) the lifetime reproductive success of the parasite. Here we studied the effect of two castrating trematode species on their intermediate snail host, Potamopyrgus antipodarum. One of the trematode species, Microphallus sp., encysts in the snail host and the encysted larvae "hatch" following ingestion of infected snails by birds. The other species, Notocotylus gippyensis, by contrast, releases swimming larvae; ingestion of the snail host is not required for, and does not aid, transmission to the final host. We isolated field-collected snails for 3 months in the laboratory, and followed the survival of infected and uninfected snails under two conditions: not fed and fed ad libitum. Mortality of the infected hosts was higher than mortality of the uninfected ones, but the response to starvation treatment was parasite species specific. N. gippyensis induced significantly higher mortality in starved snails than did Microphallus. Based on these results, we suggest that host exploitation by different species of trematodes may depend on the type of transmission. Encysting in the snail host may select for a reduced rate of host exploitation so as to increase the probability of transmission to the final host.

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Section: Discussionsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 97%

Effect of starvation on parasite-induced mortality in a freshwater snail ( Potamopyrgus antipodarum)

Jokela¹,

Lively

Taskinen

et al. 1999

Oecologia

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“…Infection with the isopod Bopyroides hippolytes reduced tolerance to salinity change in the kelp shrimp Eualus suckleyi (Moles & Pella 1984). Gastropods infected with larval digeneans were less resistant to dessication and hypoxia (Jensen et al 1996, Wegeberg & Jensen 1999. Lastly, juvenile Chinook salmon Oncorhynchus tshawystscha infected with metacercariae of the trematode Nanophyetus salmonicola exposed to PCBs suffered higher mortalities when challenged with the pathogenic bacterium Listonella anguillarum (Jacobson et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Joint effects of parasitism and pollution on oxidative stress biomarkers in yellow perch Perca flavescens

Marcogliese¹,

Brambilla²,

Gagné³

et al. 2005

Dis. Aquat. Org.

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Yellow perch Perca flavescens were collected from a contaminated site and a reference site in the St. Lawrence River, Quebec, Canada. Fish were assessed for oxidative stress (lipid peroxidation and reduced glutathione levels) and parasitism by the nematode Raphidascaris acus and metacercariae of the digenean Apophallus brevis. Lipid peroxidation is not only considered a measure of oxidative stress, but of stress in general, and thus serves as an indicator of fish health. Fish from the contaminated site exhibited higher levels of lipid peroxidation than those from the reference site, independent of parasitic infections. However, fish infected with R. acus at the contaminated site tended to have higher levels of lipid peroxidation than uninfected fish at the same site, whereas no difference was observed between infected and uninfected fish at the reference site. Yellow perch infected with >10 metacercariae of A. brevis expressed higher levels of lipid peroxidation than those infected with <10 metacercariae at both the contaminated and the reference sites. No differences were found in levels of reduced glutathione in liver or muscle in relation to site or either parasite species. Results support the use of lipid peroxidation as a biomarker of water contamination. They further suggest that lipid peroxidation may be used as a biomarker of pathological effects caused by parasitism. Most importantly, results demonstrate that contaminants and parasites occurring together exacerbate oxidative stress in fish, suggesting that parasitized fish in polluted environments are in a poorer state of health than uninfected fish.

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“…It was particularly elevated at Merja Zerga due to low mortality in a high biomass context. The vulnerability of cockles from Merja Zerga compared to Arcachon was certainly due to interaction with other factors such as temperature (Jensen et al, 1996), Morocco being at the southern limit of C. edule distribution (Gam et al, 2008). The arrows indicate when the decrease between successive months is significant.…”

Section: Discussionmentioning

confidence: 99%

Do trematode parasites affect cockle (Cerastoderma edule) secondary production and elimination?

2009

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Digenean trematodes are omnipresent in the cockle Cerastoderma edule, a common coastal bivalve of (semi-)sheltered northeastern Atlantic coasts. They can use their host as a second intermediate host where they remain in a relatively latent stage as metacercariae. Cockle population dynamics and trematode parasite load were monitored for two years in two sites, Arcachon (France) and Merja Zerga (Morocco) for the cockle cohort of 2005. Individual growth was slightly higher at Arcachon than at Merja Zerga (Von Bertalanffy parameters: K ¼ 1.5 yr 21 in both sites but L 1 ¼ 31.2 mm at Merja Zerga against 38.3 mm at Arcachon). Production during cockle life was twice as high at Merja Zerga (48.5 compared to 22.2 gDW.m 22 at Arcachon). Elimination compensated production at Merja Zerga while elimination was low at Arcachon (8.1 gDW.m 22 ) due to sediment dynamics which concentrated cockles within the sampling area. P/B was similar in both sites (2.4 -2.6 yr 21 ) while E/B was higher at Merja Zerga (2.2 yr 21 versus 1.0 yr 21 ). Trematode communities were similar in both sites in terms of species and abundance. During the cockle cohort lifespan, there were 3 to 5 events in the parasite abundance survey that suggested parasite-dependent mortality. At Merja Zerga, trematodes metacercariae did not affect P/B (2.4 yr 21 ) but increased E/B (þ14%). At Arcachon, they also had no effect on P/B (2.6 yr 21 ) but on the contrary increased E/B (þ20%). The threshold of metacercariae abundance beyond which cockles are affected was lower for Echinostomatid trematodes at Merja Zerga, suggesting an interaction with other factors such as temperature which is higher at the southern limit of cockle distribution.

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The effect of larval trematodes on the survival rates of two species of mud snails (hydrobiidae) experimentally exposed to desiccation, freezing and anoxia

Cited by 30 publications

References 26 publications

Effect of starvation on parasite-induced mortality in a freshwater snail ( Potamopyrgus antipodarum)

Effect of starvation on parasite-induced mortality in a freshwater snail ( Potamopyrgus antipodarum)

Joint effects of parasitism and pollution on oxidative stress biomarkers in yellow perch Perca flavescens

Do trematode parasites affect cockle (Cerastoderma edule) secondary production and elimination?

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