A novel Salifa–Saprolegnia association

Gouda, Hanaa A.; Moharram, A. M.

doi:10.1016/j.jip.2009.03.001

Cited by 2 publications

(2 citation statements)

References 18 publications

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“…Much attention has been given to their impact on economically valuable species such as salmonids, crayfish, shrimp, amphipods and oysters (Unestam ; Kiziewicz & Nalepa ; Phillips et al . ; Gouda & Moharram ), and to their negative effects on the aquatic stages of several amphibian species in Europe and North America (Banks & Beebee ; Beattie et al . ; Blaustein et al .…”

Section: Introductionmentioning

confidence: 99%

Early breeding protects anuran eggs fromSaprolegniainfection

Perotti

Basanta

Steciow³

et al. 2012

Austral Ecology

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Here, we studied the ecological significance of Saprolegnia infections ('saprolegniasis') on the survival and development of two populations of the endemic Patagonian anuran Pleurodema thaul (Anura, Leiuperidae).We found that four different Saprolegnia species infected eggs and embryos of P. thaul, indicating that the infection by these 'zoosporic fungi' was different in each anuran population and among different cohorts. Late anuran cohorts generally showed a higher incidence of infection than early cohorts, but we observed no clear overall pattern between populations. In addition, in laboratory experiments, we determined that some of the Saprolegnia species induce early hatching, and that hatching timing was variable between populations. In summary, we found that early breeding (by underlying priority effects) could improve the survival of the earliest cohorts of P. thaul by allowing them to survive the stress imposed by epidemic events of Saprolegnia.

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Section: Introductionmentioning

confidence: 99%

Early breeding protects anuran eggs fromSaprolegniainfection

Perotti

Basanta

Steciow³

et al. 2012

Austral Ecology

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“…Oomycetes (water molds) are parasites known to cause high levels of mortality in many groups of aquatic organisms (Barron 2004;Cerenius et al 1988;Ramaiah 2006;Wolinska et al 2008). Much attention has been given to their impact on economically valuable species such as salmonids, crayfish, shrimp and oysters (Gouda and Moharram 2009;Phillips et al 2008;Unestam 1973), but their effects on amphipods are poorly known (but see Kiziewicz and Nalepa 2008;Phillips et al 2008;Unestam 1973), despite the important functional role that amphipods serve in freshwater communities, e.g., as grazers or prey for higher trophic levels (MacNeil et al 1997;Boisclair and Leggett 1989).…”

Section: Introductionmentioning

confidence: 99%

Differential infection of exotic and native freshwater amphipods by a parasitic water mold in the St. Lawrence River

et al. 2010

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A parasitic water mold (oomycete) of unknown origin was discovered infecting live native and exotic freshwater gammarid amphipods (Gammarus fasciatus and Echinogammarus ischnus, respectively) in the upper St. Lawrence River. Infections were associated with rapid die-offs of natural populations of amphipods, especially the exotic E. ischnus. Analysis of sequences of three different segments of the rRNA gene cluster indicated that the parasite was in the Saprolegniaceae family, and is related to other crustacean-associated Saprolegniaceae. Specific primers were designed based on the SSU rRNA gene and utilized for semi-quantitative analysis of parasite presence in live and dead amphipods. In laboratory experiments, infection prevalence was higher in E. ischnus individuals than in native amphipods. In addition, dead E. ischnus individuals exhibited more intense infections than G. fasciatus individuals. In contrast to the Great Lakes where E. ischnus has replaced G. fasciatus at many locations, the native species remains abundant in the St. Lawrence River more than a decade after invasion by E. ischnus in the late 1990s. We hypothesize that the parasite is facilitating the co-existence of the two amphipod species by reducing the abundance of E. ischnus in environments in which it might otherwise be dominant.

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A novel Salifa–Saprolegnia association

Cited by 2 publications

References 18 publications

Early breeding protects anuran eggs fromSaprolegniainfection

Early breeding protects anuran eggs fromSaprolegniainfection

Differential infection of exotic and native freshwater amphipods by a parasitic water mold in the St. Lawrence River

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