Results 141 to 150 of about 571 (171)

Wound reactions and Aphanomyces astaci growth in crayfish cuticle

Journal of Invertebrate Pathology, 1980
Abstract Superficial wounding of crayfish soft cuticle by removal of the epicuticle caused hemocyte aggregation beneath the wound. The aggregation seemed to be induced by osmotic factors. Subsequently, melanin was only formed in parts of the wound region.
Lars Nyhlén, Torgny Unestam
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Prevalence of the pathogen Aphanomyces astaci in freshwater crayfish populations in Croatia

Diseases of Aquatic Organisms, 2016
The Oomycete Aphanomyces astaci is an obligate crayfish parasite that co-evolved with American crayfish species, and they therefore generally live in a balanced relationship. On the contrary, European native crayfish are highly susceptible to A. astaci, and infestation with it causes development of the lethal disease termed crayfish plague.
Maguire, Ivana, Jelić, Mišel, Goran, Klobučar, Mylène, Delpy, Carine, Delaunay, Frederic, Grandjean   +5 more
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Physiological Variation in Strains of Aphanomyces astaci

Physiologia Plantarum, 1971
AbstractPhysiological variation was found both between and within strains of the crayfish plague fungus, Aphanomyces astaci, in culture.The loss of capacity to produce spores was irreversible while losses of motility and virulence to the crayfish were reversible changes.
T. UNESTAM, E. SVENSSON
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Aphanomyces astaci pathogenicity under laboratory and field conditions

Journal of Fish Diseases, 1987
Abstract. The high pathogenicity of Aphanomyces astaci to susceptible crayfish has often been mentioned but not well investigated in publications on crayfish plague. This paper presents a study of that pathogenicity and considers the relationships between size of zoospore challenge and challenge temperature, which results in the extremely complex ...
D. J. ALDERMAN, JANE L. POLGLASE, M. FRAYLING   +2 more
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Resistance to the crayfish plague pathogen, Aphanomyces astaci, in two freshwater shrimps

Journal of Invertebrate Pathology, 2014
Aphanomyces astaci, the causal agent of the crayfish plague, has recently been confirmed to infect also freshwater-inhabiting crabs. We experimentally tested the resistance of freshwater shrimps, another important decapod group inhabiting freshwaters, to this pathogen.
J, Svoboda, A, Mrugała, E, Kozubíková-Balcarová, A, Kouba, J, Diéguez-Uribeondo, A, Petrusek   +5 more
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Recent acute crayfish mortality reveals Aphanomyces astaci presence in Bosnia and Herzegovina

Journal of Invertebrate Pathology, 2017
Although the introduction of the crayfish plague pathogen Aphanomyces astaci to Europe is responsible for substantial declines in native crayfish populations throughout the whole continent, its presence has never been officially confirmed in many European regions, including most of the Balkan Peninsula. We demonstrate that the recent crayfish mortality
Agata Mrugała, Radek Šanda, Adam Petrusek, Dario Marić, Jasna Vukić   +4 more
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The secondary zoospore of Aphanomyces astaci and A. laevis (Oomycetes, Saprolegniales)

Nordic Journal of Botany, 1984
The ultrastructure of the secondary zoospores of Aphanomyces astaci and A. laevis was compared. The general appearance of the organelles and their compartmental–ization is the same, but some subtle differences were found. A. laevis
L. Cerenius, L. W. Olson, L. Lange, K. Söderhäll   +3 more
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On the Physiology of Zoospore Production in Aphanomyces astaci

Physiologia Plantarum, 1969
Abstract Aphunomgces astaci, Saprolegniaceae, the crayfish plague parasite, grows well in a buffered peptone ‐ glucose ‐ mineral salt medium but does not normally produce spores during growth in this medium. Sporulation is, however, easily induced by transfer to pond water.
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Aphanomyces astaci genotypes involved in recent crayfish plague outbreaks in central Italy

Diseases of Aquatic Organisms, 2018
The oomycete Aphanomyces astaci is the causative agent of crayfish plague in native European freshwater crayfish. Molecular analyses showed that several distinct genotype groups of this pathogen, apparently associated with different original host taxa, are present in Europe.
Riccardo, Caprioli, Agata, Mrugała, Marco, Di Domenico, Valentina, Curini, Carla, Giansante, Cesare, Cammà, Adam, Petrusek   +6 more
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Crayfish plague Aphanomyces astaci detected in redclaw crayfish, Cherax quadricarinatus in Taiwan

Journal of Invertebrate Pathology, 2016
Between December 2013 and January 2014, five outbreaks of an unknown disease with moderate to high cumulative mortality were observed among the freshwater redclaw crayfish (Cherax quadricarinatus) populations at four crayfish farms in Miaoli and Changhua counties (northern Taiwan) and at one crayfish farm in Pingtung County (southern Taiwan ...
Chia-Yu, Hsieh, Chen-Wei, Huang, Yi-Cheng, Pan   +2 more
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