Effects of two acanthocephalan species on the reproduction of Hyalella patagonica (Amphipoda, Hyalellidae) in an Andean Patagonian Lake (Argentina)

Rauque, Carlos; Semenas, Liliana

doi:10.1016/j.jip.2008.10.001

Cited by 18 publications

(17 citation statements)

References 18 publications

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“…Carotenoïd concentrations were measured by a spectrophotometry method adapted from Rauque and Semenas (2009) [54]. Fifty microlitres of the total homogenate were diluted in 450 µL of ethanol 96% and kept 6 hrs in the dark at 4°C, before being centrifuged 10 min at 3,500× g. The optical density of the resulting supernatant was measured at 422, 448 and 476 nm using a commercial mixture of carotenoïds as a standard.…”

Section: Methodsmentioning

confidence: 99%

Effect of Multiple Parasitic Infections on the Tolerance to Pollutant Contamination

et al. 2012

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The horizontally-transmitted acanthocephalan parasite Polymorphus minutus and the vertically-transmitted microsporidian parasite Dictyocoela roeselum have both been shown to influence on the antitoxic responses of mono-infected Gammarus roeseli exposed to cadmium. The present study investigates the effect of this co-infection on the antitoxic defence responses of naturally infected females exposed to cadmium stress. Our results revealed that, depending on the cadmium dose, bi-infection induced only slight, significant increased cell damage in G. roeseli as compared to non-infection. In addition, the antitoxic defence pattern of cadmium-exposed bi-infected hosts was similar to the pattern of cadmium-exposed D. roeselum-infected hosts. Reduced glutathione concentrations, carotenoid levels and γ-glutamylcystein ligase activity decreased, while metallothionein concentrations increased. This similar pattern indicates that host physiology can be controlled to some extent by microsporidia under stress conditions. It supports the hypothesis of a disruption of acanthocephalan effects in the presence of microsporidia. However, the global negative effects of bi-infection on host condition should be tested on more biological models, since competition between parasites depends on life history trade-off.

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Section: Methodsmentioning

confidence: 99%

Effect of Multiple Parasitic Infections on the Tolerance to Pollutant Contamination

et al. 2012

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“…Carotenoid concentrations were measured by a spectrophotometry method adapted from Rauque and Semenas [42]. A volume of 40 µL of the total homogenate was diluted in 450 µL of 96% ethanol and kept 6 hrs in the dark at 4°C, before being centrifuged 10 min at 3,500× g. The optical density of the resulting supernatant was measured at 422, 448 and 476 nm, corresponding to the three major absorbance peaks observed in the absorption spectrum of G. roeseli (data not shown).…”

Section: Methodsmentioning

confidence: 99%

Polymorphus Minutus Affects Antitoxic Responses of Gammarus Roeseli Exposed to Cadmium

2012

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The acanthocephalan parasite Polymorphus minutus is a manipulator of its intermediate host Gammarus roeseli, which favours its transmission to the final host, a water bird. In contaminated environments, G. roeseli have to cope with two stresses, i.e. P. minutus infection and pollutants. As P. minutus survival relies on its host's survival, we investigated the influence of P. minutus on the antitoxic defence capacities and the energy reserves of G. roeseli females after cadmium exposure. In parallel, malondialdehyde, a toxic effect biomarker, was measured in G. roeseli females and in P. minutus. The results revealed that infected females displayed higher cell damage than uninfected ones, despite an apparent increase in reduced glutathione and metallothionein production. In fact, the increase of these antitoxic systems could be counterbalanced by carotenoid intake by the parasite, so that the overall defence system seemed less efficient in infected females than in uninfected ones. In addition, we demonstrated that cadmium induced cell damage in P. minutus, probably linked with cadmium accumulation in the parasite. Altogether, we observed a paradoxical pattern of responses suggesting that P. minutus increases cadmium toxicity in G. roeseli females although (i) it tends to increase several host antitoxic defence capacities and (ii) it bears part of the pollutant, as reflected by cell damage in the parasite.

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“…Distributional data for this study were obtained from the literature (Lopretto 1982(Lopretto , 1983aPereira, 1985, 1989Pereira et al 1985, 1989Stock and Plavoet 1991;Bond-Buckup and Araujo 1998;Casset et al 2001;González and Coleman 2002;González andWattling 2002a-c, 2003a-d;Carrera and Günkel 2003;González 2003;Jergentz et al 2004;Pereira 2004;Coleman & González, 2006;Galan & Herrera, 2006;González et al 2006;Da Silva and BondBuckup 2008;Dos Santos et al 2008;Dutra et al 2008;Zilli et al 2008;Rauque and Semenas 2009;Spaccesi & Rodríguez. 2009;De los Ríos et al 2007, 2010De los Ríos and Roa 2010;Cardoso et al, 2011;Bastos-Pereira & De Padua-Bueno, 2012 (Brehm-Lunz, 1928, 1935Gonzalez & Wattling, 2003c;González et al, 2006) Coordinates of localities were obtained from the literature or calculated on maps and rounded to minutes.…”

Section: Methodsmentioning

confidence: 99%

Distributional patterns of the South American species of Hyalella (Amphipoda: Hyalellidae)

Ríos-Escalante¹,

Morrone²,

Rivera³

2012

Gayana (Concepc.)

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Effects of two acanthocephalan species on the reproduction of Hyalella patagonica (Amphipoda, Hyalellidae) in an Andean Patagonian Lake (Argentina)

Cited by 18 publications

References 18 publications

Effect of Multiple Parasitic Infections on the Tolerance to Pollutant Contamination

Effect of Multiple Parasitic Infections on the Tolerance to Pollutant Contamination

Polymorphus Minutus Affects Antitoxic Responses of Gammarus Roeseli Exposed to Cadmium

Distributional patterns of the South American species of Hyalella (Amphipoda: Hyalellidae)

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