Hallo ihr Lieben! Ich bin Biologiestudentin und habe in der Vorlesung mal über einen Pilz gehört, der Froschlaich befällt und diesen trübt. Er kommt vorallem in Gewässern mit niedrigem pH-Wert vor. Ich kann mich leider nicht mehr daran erinnern, wie dieser Pilz hieß, kann mir da jemand helfen?
Grüße Lisa
Laichpilz
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Christian (Hessen)
Ja, Saprolegnia ist die Gattung. Oft wird die Art Saprolegnia ferox genannt, aber ich habe mir sagen lassen, dass die Systematik/Taxonomie dieser Pilze noch nicht wirklich ausgereift ist, daher ist Saprolegnia sp. wohl am besten.
Der Pilz ist wahrscheinlich hier drin beschrieben
http://www.amazon.de/Erkrankungen-Amphi ... 709&sr=8-2
Sonst schau mal hier
Title: Diseases of amphibians
Author(s): Densmore CL (Densmore, Christine L.), Green DE (Green, David Earl)
Source: ILAR JOURNAL Volume: 48 Issue: 3 Pages: 235-254 Published: 2007
Abstract: The development and refinement of amphibian medicine comprise an ongoing science that reflects the unique life history of these animals and our growing knowledge of amphibian diseases. Amphibians are notoriously fastidious in terms of captive care requirements, and the majority of diseases of amphibians maintained in captivity will relate directly or indirectly to husbandry and management. Investigators have described many infectious and noninfectious diseases that occur among various species of captive and wild amphibians, and there is considerable overlap in the diseases of captive versus free-ranging populations. In this article, some of the more commonly reported infectious and noninfectious diseases as well as their etiological agents and causative factors are reviewed. Some of the more common amphibian diseases with bacterial etiologies include bacterial dermatosepticemia or "red leg syndrome," flavobacteriosis, mycobacteriosis, and chlamydiosis. The most common viral diseases of amphibians are caused by the ranaviruses, which have an impact on many species of anurans and caudates. Mycotic and mycotic-like organisms cause a number of diseases among amphibians, including chytridiomycosis, zygomycoses, chromomycoses, saprolegniasis, and ichthyophoniasis. Protozoan parasites of amphibians include a variety of amoeba, ciliates, flagellates, and sporozoans Common metazoan parasites include various myxozoans, helminths (particularly trematodes and nematodes), and arthropods. Commonly encountered noninfectious disease etiologies for amphibians include neoplasia, absolute or specific nutritional deficiencies or overloads, chemical toxicities, and inadequate husbandry or environmental management.
Title: Susceptibility of frog (Rana temporaria) and toad (Bufo bufo) eggs to invasion by Saprolegnia
Author(s): Robinson, J; Griffiths, RA; Jeffries, P
Source: AMPHIBIA-REPTILIA Volume: 24 Issue: 3 Pages: 261-268 Published: 2003
Abstract: Infections of amphibian eggs sometimes cause catastrophic losses of reproductive effort, but susceptibility to infection in different species is poorly understood. Using laboratory trials we showed that direct hyphal invasion of adjacent eggs by Saprolegnia caused a higher incidence of infection than invasion by zoospores. Moreover, we observed that dead eggs were much more readily colonized than live eggs when challenged with zoospores from two strains of Saprolegnia. The two strains were equally effective in causing infections of Rana teinporaria eggs, but differed in their ability to infect eggs of Bufo bufo. In live R. temporaria eggs, early stages (pre-tailbud) were more frequently infected by hyphal invasion than later stages by the same strains, suggesting that susceptibility to infection decreases as development proceeds.
Title: Aquatic fungi growing on the spawn of certain amphibians
Author(s): Czeczuga, B; Muszynska, E; Krzeminska, A
Source: AMPHIBIA-REPTILIA Volume: 19 Issue: 3 Pages: 239-251 Published: AUG 1998
Abstract: The mycoflora developing on the spawn of nine species of amphibians was investigated under laboratory conditions. Fifty-two zoosporic fungus species were found to grow on the spawn investigated, including 6 chytridiomycetes, 1 hyphochytriomycete, 44 oomycetes and 1 zygomycete fungus. Out of these 52 species, 23 are known as parasites or necrotrophs of fish. Five fungus species were recorded for the first time from Poland.
Title: Complex causes of amphibian population declines
Author(s): Kiesecker, JM; Blaustein, AR; Belden, LK
Source: NATURE Volume: 410 Issue: 6829 Pages: 681-684 Published: APR 5 2001
Abstract: Amphibian populations have suffered widespread declines and extinctions in recent decades. Although climatic changes, increased exposure to ultraviolet-B (UV-B) radiation and increased prevalence of disease have all been implicated at particular localities(1-6), the importance of global environmental change remains unclear. Here we report that pathogen outbreaks in amphibian populations in the western USA are linked to climate-induced changes in UV-B exposure. Using long-term observational data and a field experiment, we examine patterns among interannual variability in precipitation, UV-B exposure and infection by a pathogenic oomycete, Saprolegnia ferax. Our findings indicate that climate-induced reductions in water depth at oviposition sites have caused high mortality of embryos by increasing their exposure to UV-B radiation and, consequently, their vulnerability to infection(1). Precipitation, and thus water depth/UV-B exposure, is strongly linked to El Nino/Southern Oscillation cycles, underscoring the role of large-scale climatic patterns involving the tropical Pacific(7). Elevated sea-surface temperatures in this region since the mid-1970s, which have affected the climate over much of the world (8 ), could be the precursor for pathogen-mediated amphibian declines in many regions(1,3,4,9).
u.v.m.
Gruss, Benedikt
Der Pilz ist wahrscheinlich hier drin beschrieben
http://www.amazon.de/Erkrankungen-Amphi ... 709&sr=8-2
Sonst schau mal hier
Title: Diseases of amphibians
Author(s): Densmore CL (Densmore, Christine L.), Green DE (Green, David Earl)
Source: ILAR JOURNAL Volume: 48 Issue: 3 Pages: 235-254 Published: 2007
Abstract: The development and refinement of amphibian medicine comprise an ongoing science that reflects the unique life history of these animals and our growing knowledge of amphibian diseases. Amphibians are notoriously fastidious in terms of captive care requirements, and the majority of diseases of amphibians maintained in captivity will relate directly or indirectly to husbandry and management. Investigators have described many infectious and noninfectious diseases that occur among various species of captive and wild amphibians, and there is considerable overlap in the diseases of captive versus free-ranging populations. In this article, some of the more commonly reported infectious and noninfectious diseases as well as their etiological agents and causative factors are reviewed. Some of the more common amphibian diseases with bacterial etiologies include bacterial dermatosepticemia or "red leg syndrome," flavobacteriosis, mycobacteriosis, and chlamydiosis. The most common viral diseases of amphibians are caused by the ranaviruses, which have an impact on many species of anurans and caudates. Mycotic and mycotic-like organisms cause a number of diseases among amphibians, including chytridiomycosis, zygomycoses, chromomycoses, saprolegniasis, and ichthyophoniasis. Protozoan parasites of amphibians include a variety of amoeba, ciliates, flagellates, and sporozoans Common metazoan parasites include various myxozoans, helminths (particularly trematodes and nematodes), and arthropods. Commonly encountered noninfectious disease etiologies for amphibians include neoplasia, absolute or specific nutritional deficiencies or overloads, chemical toxicities, and inadequate husbandry or environmental management.
Title: Susceptibility of frog (Rana temporaria) and toad (Bufo bufo) eggs to invasion by Saprolegnia
Author(s): Robinson, J; Griffiths, RA; Jeffries, P
Source: AMPHIBIA-REPTILIA Volume: 24 Issue: 3 Pages: 261-268 Published: 2003
Abstract: Infections of amphibian eggs sometimes cause catastrophic losses of reproductive effort, but susceptibility to infection in different species is poorly understood. Using laboratory trials we showed that direct hyphal invasion of adjacent eggs by Saprolegnia caused a higher incidence of infection than invasion by zoospores. Moreover, we observed that dead eggs were much more readily colonized than live eggs when challenged with zoospores from two strains of Saprolegnia. The two strains were equally effective in causing infections of Rana teinporaria eggs, but differed in their ability to infect eggs of Bufo bufo. In live R. temporaria eggs, early stages (pre-tailbud) were more frequently infected by hyphal invasion than later stages by the same strains, suggesting that susceptibility to infection decreases as development proceeds.
Title: Aquatic fungi growing on the spawn of certain amphibians
Author(s): Czeczuga, B; Muszynska, E; Krzeminska, A
Source: AMPHIBIA-REPTILIA Volume: 19 Issue: 3 Pages: 239-251 Published: AUG 1998
Abstract: The mycoflora developing on the spawn of nine species of amphibians was investigated under laboratory conditions. Fifty-two zoosporic fungus species were found to grow on the spawn investigated, including 6 chytridiomycetes, 1 hyphochytriomycete, 44 oomycetes and 1 zygomycete fungus. Out of these 52 species, 23 are known as parasites or necrotrophs of fish. Five fungus species were recorded for the first time from Poland.
Title: Complex causes of amphibian population declines
Author(s): Kiesecker, JM; Blaustein, AR; Belden, LK
Source: NATURE Volume: 410 Issue: 6829 Pages: 681-684 Published: APR 5 2001
Abstract: Amphibian populations have suffered widespread declines and extinctions in recent decades. Although climatic changes, increased exposure to ultraviolet-B (UV-B) radiation and increased prevalence of disease have all been implicated at particular localities(1-6), the importance of global environmental change remains unclear. Here we report that pathogen outbreaks in amphibian populations in the western USA are linked to climate-induced changes in UV-B exposure. Using long-term observational data and a field experiment, we examine patterns among interannual variability in precipitation, UV-B exposure and infection by a pathogenic oomycete, Saprolegnia ferax. Our findings indicate that climate-induced reductions in water depth at oviposition sites have caused high mortality of embryos by increasing their exposure to UV-B radiation and, consequently, their vulnerability to infection(1). Precipitation, and thus water depth/UV-B exposure, is strongly linked to El Nino/Southern Oscillation cycles, underscoring the role of large-scale climatic patterns involving the tropical Pacific(7). Elevated sea-surface temperatures in this region since the mid-1970s, which have affected the climate over much of the world (8 ), could be the precursor for pathogen-mediated amphibian declines in many regions(1,3,4,9).
u.v.m.
Gruss, Benedikt