Results 41 to 50 of about 424 (153)

Invasive zoopathogenic mastigomycotina in Republika Srpska, Serbia and neighboring countries with special reference to Aphanomyces astaci [PDF]

Zbornik Matice Srpske za Prirodne Nauke, 2013
Non-native alien zoopathogens have had a profound impact on the health of aquatic zoobiota in Republika Srpska and the Republic of Serbia as well as around the region and the world as a whole.
Vujčić Slobodanka B., Lolić Svjetlana B., Bojić Mara M., Ilić Predrag B., Novaković Milana S., Karaman Maja A., Matavulj Milan N.   +6 more
doaj   +1 more source

The Prevalence of Crayfish Plague (Aphanomyces Astaci) in Two Signal Crayfish (Pacifastacus Leniusculus) Populations in Finland [PDF]

Journal of Crustacean Biology, 2000
Abstract The occurrence of dark brown melanized spots indicative of the presence of crayfish plague fungus (Aphanomyces astaci Schikora) was investigated in three Finnish lakes inhabited by the introduced American signal crayfish (Pacifastacus leniusculus Dana) in 1979, 1983, 1985–1988, 1990, 1993, and 1994. The crayfish were caught with crayfish traps
Viljo Nylund, Kai Westman
openaire   +1 more source

ROUNDTABLE SESSION 4A: MANAGEMENT: REINTRODUCTIONS AND RESTOCKING.

Knowledge and Management of Aquatic Ecosystems, 2002
The present paper summarizes the outcome of a roundtable discussion on reintroductions or restocking as a management strategy for native European crayfish, which took place during the European Crayfish conference in Poitiers, France in September 2001.
SCHULZ R., STUCKI T., SOUTY-GROSSET C.
doaj   +1 more source

Two indigenous European crayfish under threat – how can we retain them in aquatic ecosystems for the future?

Knowledge and Management of Aquatic Ecosystems, 2011
Indigenous crayfish species (ICS) are under threat in Europe; due to competition from invasive non-indigenous crayfish species (NICS) from crayfish plague, which is carried by introduced American crayfish, and habitat degradation.
Peay S., Füreder L.
doaj   +1 more source

First record of the stone crayfish in the Romanian lowlands

Knowledge and Management of Aquatic Ecosystems, 2021
The stone crayfish is a native European freshwater species with significant population declines caused by anthropogenic pressure onto its habitats, climate change and spreading of non-indigenous invasive crayfish and their pathogens (e.g., Aphanomyces ...
Groza Marius-Ioan, Cupșa Diana, Lovrenčić Leona, Maguire Ivana   +3 more
doaj   +1 more source

Detection of crayfish plague spores in large freshwater systems [PDF]

Journal of Applied Ecology, 2014
Summary Indigenous European freshwater crayfish (ICS) are threatened due to invasive North American freshwater crayfish that are natural carriers of Aphanomyces astaci which causes crayfish plague. Infectious A. astaci zoospores are released from carrier crayfish, but little is known about the spore abundance in water systems that either host non ...
David A. Strand, Japo Jussila, Stein I. Johnsen, Satu Viljamaa‐Dirks, Lennart Edsman, Jannicke Wiik‐Nielsen, Hildegunn Viljugrein, Frederik Engdahl, Trude Vrålstad   +8 more
openaire   +1 more source

PCR detection of the crayfish plague pathogen in narrow-clawed crayfish inhabiting Lake Eğirdir in Turkey [PDF]

Diseases of Aquatic Organisms, 2012
Many populations of the narrow-clawed crayfish Astacus leptodactylus in Turkey, including those inhabiting Lake Eğirdir, declined drastically in the mid-1980s due to introduction of crayfish plague Aphanomyces astaci. However, unlike many other localities, there has been some recovery in the A.
Kozubikova, E., Kozak, P., Kouba, A., Diler, O., Policar, T., Svoboda, J., Petrusek, A., Diler, I., Koca, S. Bahadir   +8 more
openaire   +3 more sources

Variation in Resistance to the Invasive Crayfish Plague and Immune Defence in the Native Noble Crayfish [PDF]

Annales Zoologici Fennici, 2014
Emerging diseases, such as the crayfish plague, are a worldwide problem with serious ecological and economic impacts. Under the framework of ecological immunology, we investigated whether variation in crayfish plague resistance, the indicators of immune defence (encapsulation response, phenoloxidase and lytic activity), and the exploration behaviour ...
Gruber, Christina, Kortet, Raine, Vainikka, Anssi, Hyvärinen, Pekka, Rantala, Markus J., Pikkarainen, Ari, Jussila, Japo, Makkonen, Jenny, Kokko, Harri, Hirvonen, Heikki   +9 more
openaire   +2 more sources

HAZARD ANALYSIS OF EXOTIC PATHOGENS OF POTENTIAL THREAT TO EUROPEAN FRESHWATER CRAYFISH.

Knowledge and Management of Aquatic Ecosystems, 2002
Managers, scientists, fishermen and farmers who work with freshwater crayfish understand clearly the severe affects that the introduction of an exotic pathogen can have on freshwater crayfish populations.
EDGERTON B. F.
doaj   +1 more source

Analysis of chitinase expression in the crayfish plague fungus Aphanomyces astaci [PDF]

Diseases of Aquatic Organisms, 2002
Chitinase, as determined by enzymatic activity in the growth medium and by transcription of the chitinase gene AaChi1, is expressed at a high level during vegetative growth of the crayfish pathogen Aphanomyces astaci and expression is not further stimulated by chitin. Expression is not detected in zoospores and it does not increase to high levels until
M Gunnar, Andersson, Lage, Cerenius
openaire   +2 more sources