Ethological Aspects of Parasite Transmission

Combes, Claude

doi:10.1086/285257

Cited by 167 publications

(103 citation statements)

References 22 publications

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“…Nevertheless, parasites can act directly on cockle mortality (Deltreil & His 1970, Jonsson & André 1992 or indirectly by modification of the host behaviour to increase the probability for larval stages to encounter their host-target (Combes 1980, 1991, Moore & Gotelli 1990, Poulin 1995. Few cases of massive direct mortalities have been reported for cockles (Michaelis 1979, Jonsson & André 1992, or for gastropods and corophid amphipods (Lauckner 1987a, Jensen & Mouritsen 1992.…”

Section: Introductionmentioning

confidence: 99%

Cockle emergence at the sediment surface: 'favourization' mechanism by digenean parasites?

Desclaux

Montaudouin²,

Bachelet³

2002

Dis. Aquat. Org.

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The aim of the present work was to assess the effect of digenean trematodes on indirect mortality of the cockle Cerastoderma edule, an infaunal bivalve. The tested hypothesis was that parasites altered the burrowing capacity of cockles and thus exposed them at the sediment surface, where they are more vulnerable to predators. If the predator is the final host, this mechanism, which drives the cockle out of the sediment, is considered as a 'favourization'. Cockle populations from 2 stations in Arcachon Bay (France) -Banc d'Arguin (oceanic situation) and La Canelette (lagoonal situation) -were sampled for 1 yr. At La Canelette, monitoring every 2 d showed that 50% of adult cockles regularly migrated to the sediment surface at a rate of 5 cockles m -2 yr -1 and disappeared in a few days. In the laboratory, 67% of these 'surface cockles' did not burrow again, suggesting that they would die in the field. Moreover, mortality measured after 7 d in the laboratory was 2 to 5 times higher than mortality of 'buried cockles', at both stations and particularly during summer. Species richness and abundance of digeneans from both stations were compared in 'buried' and 'surface' individuals to determine whether parasites played a role in cockle migration and mortality. Ten and 9 digeneans were found at Banc d'Arguin and La Canelette, respectively, with Himasthla quissetensis and Labratrema minimus being the most prevalent and abundant species at both stations. The abundance of H. quissetensis was slightly higher in surface cockles at Banc d'Arguin, but the difference fluctuated with station and cockle age (or size). L. minimus prevalence was only higher in surface cockles at La Canelette. In the latter station, we estimated that L. minimus and H. quissetensis were responsible for the emergence of 9 and 2%, respectively, of the buried cockles. Although this favourization mechanism may induce some mortality in cockles, it does not alone explain the magnitude of the observed mortalities (41 and 57% at La Canelette and Banc d'Arguin, respectively). A correspondence analysis did not show the presence of a particular parasite community in buried or surface cockles, which could explain these high surface cockle mortalities in association with the 2 dominant digeneans.

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Section: Introductionmentioning

confidence: 99%

Cockle emergence at the sediment surface: 'favourization' mechanism by digenean parasites?

Desclaux

Montaudouin²,

Bachelet³

2002

Dis. Aquat. Org.

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“…The spread and intensification of infections can result in epizootics, which are disease epidemics in nonhuman animal populations. Parasite-induced alterations in host phenotype have been frequently reported in a wide range of protozoan and metazoan parasites with complex life cycles (Combes 1991;Poulin 1998). Unfortunately, the aetiology of diseases is poorly understood and warrants a deeper study.…”

Section: Systematic Positionmentioning

confidence: 99%

First record of protozoan parasites, Tetrahymena rostrata and Callimastix equi from the edible oyster in Sundarbans region of West Bengal, India

Biswas

Bandyopadhyay

2014

J Parasit Dis

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Several protozoan parasites have been found infecting the edible oysters, hence deteriorating the meat quality. Protozoan parasites such as, Tetrahymena rostrata and Callimastix equi infested the edible oyster in Sundarbans region, West Bengal, India, are first record from this region. Due to filter feeding habit of the organisms, oysters provides excellent ecological services in regard to efficient cleaning of infectious agents from surrounding water as a potential measure to improve water quality. However, these environmental benefits are associated with public heath risks from contaminated oysters intended for human consumption.

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“…The ability of parasites to induce alterations in their intermediate hosts has frequently been related to a type of adaptive strategy that would allow them to complete their life cycles (Holmes and Bethel, 1972;Camp and Huizinga, 1979;Dobson, 1988;Combes, 1991;Haye and Ojeda, 1998). Questions regarding the mechanisms through which the infected intermediate hosts change their behavior have received little attention in the literature.…”

Section: Introductionmentioning

confidence: 99%

Altered dopamine levels induced by the parasite Profilicollis antarcticus on its intermediate host, the crab Hemigrapsus crenulatus

Rojas

Ojeda

2005

Biol. Res.

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A serotonergic pathway is apparently involved in parasite-host interactions. Previous studies conducted in our laboratory showed increased rates in oxygen consumption and alterations in body posture in the crab Hemigrapsus crenulatus parasitized by the acanthocephalan, Profilicollis antarcticus. Such changes may be related to the functions described for biogenic amines in crustaceans. During the infective stage the acanthocephalans live freely in the hemocelomic cavity, suggesting that the possible alteration induced by biogenic amines may be related to their neurohormonal function in crustaceans. To test whether the presence of P. antarcticus produced neurohormonal changes in its intermediate host, H. crenulatus, we analyzed serotonin and dopamine levels in the host using HPLC with electrochemical detection. Two groups of 11 female crabs were studied; one group was artificially inoculated with two cystacanths while the other was used as the control. Our results show a dramatic increase in hemolymph dopamine, but not serotonin in H. crenulatus parasitized by the acanthocephalan P. antarcticus. Our results, along with those reported by Maynard (1996), suggest a parasite-specific strategy involved in the behavior alteration caused by the acanthocephalans on their intermediate host. The use of a biogenic amine as a mechanism of interaction by the parasites gives them an endless number of alternative potential actions on their intermediate hosts.

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Ethological Aspects of Parasite Transmission

Cited by 167 publications

References 22 publications

Cockle emergence at the sediment surface: 'favourization' mechanism by digenean parasites?

Cockle emergence at the sediment surface: 'favourization' mechanism by digenean parasites?

First record of protozoan parasites, Tetrahymena rostrata and Callimastix equi from the edible oyster in Sundarbans region of West Bengal, India

Altered dopamine levels induced by the parasite Profilicollis antarcticus on its intermediate host, the crab Hemigrapsus crenulatus

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