Results 11 to 20 of about 565 (161)

Microevolution of the noble crayfish (Astacus astacus) in the Southern Balkan Peninsula [PDF]

open access: yesBMC Evolutionary Biology, 2017
Background The noble crayfish (Astacus astacus) displays a complex historical and contemporary genetic status in Europe. The species divergence has been shaped by geological events (i.e.
Anastasia Laggis   +5 more
doaj   +4 more sources

Genetic diversity in natural populations of noble crayfish (Astacus astacus L.) in north-western Poland on the basis of combined SSR and AFLP data [PDF]

open access: yesPeerJ, 2019
Background Conservation of noble crayfish (Astacus astacus) populations is becoming particularly important since the number of individuals is rapidly declining across the distribution range of the species in Europe.
Remigiusz Panicz   +5 more
doaj   +3 more sources

Invasive signal crayfish and native noble crayfish show trophic niche shrinkage in sympatry [PDF]

open access: yesNeoBiota
Studying the coexistence of native species and invasive species with similar functional traits, habitat usage, and feeding habits is crucial for understanding the dynamics of invasion and ecological changes in the invaded ecosystem.
Fabio Ercoli   +5 more
doaj   +4 more sources

REINTRODUCTION OF NOBLE CRAYFISH ASTACUS ASTACUS AFTER CRAYFISH PLAGUE IN NORWAY [PDF]

open access: yesKnowledge and Management of Aquatic Ecosystems, 2004
The Glomma and Halden watercourses in Norway were hit by crayfish plague in 1987 and 1989. Reintroduction of the noble crayfish started in 1989 in the Glomma and in 1995 in the Halden watercourse.
TAUGBØL T.
doaj   +2 more sources

Distribution of Non-Indigenous Crayfish Species in Estonia and Their Impacts on Noble Crayfish (Astacus astacus L.) Populations

open access: yesDiversity, 2023
Invasive non-indigenous crayfish species (NICS) are a major threat to the existence of native crayfish populations in European freshwater ecosystems. The discovery of signal crayfish Pacifastacus leniusculus, marbled crayfish Procambarus virginalis, and ...
Michael Oliewo Aluma   +3 more
doaj   +2 more sources

Status and management of noble crayfish Astacus astacus in Estonia [PDF]

open access: yesKnowledge and Management of Aquatic Ecosystems, 2009
Noble crayfish Astacus astacus (L.) is an indigenous and the only crayfish species in Estonia. It is potentially endangered by invasion of alien species, diseases and habitat deterioration but does not have legal protected status and is fished only for ...
T. Paaver, M. Hurt
doaj   +3 more sources

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

open access: yesAnnales 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   +9 more
openaire   +2 more sources

EXPLOITATION IS A PREREQUISITE FOR CONSERVATION OF ASTACUS ASTACUS

open access: yesKnowledge and Management of Aquatic Ecosystems, 2004
The noble crayfish, Astacus astacus, is highly valued from a recreational and economical point of view. In most noble crayfish areas, there are long traditions of crayfish catching.
TAUGBØL T.
doaj   +1 more source

Exponential increase of signal crayfish in running waters in Sweden – due to illegal introductions?

open access: yesKnowledge and Management of Aquatic Ecosystems, 2011
Sweden has only one indigenous species of crayfish, the noble crayfish (Astacus astacus, Fabricius). There has been a steady decline of noble crayfish populations in Sweden since 1907, mainly due to the crayfish plague.
Bohman P.   +3 more
doaj   +1 more source

STATUS OF FRESHWATER CRAYFISH IN LATVIA

open access: yesKnowledge and Management of Aquatic Ecosystems, 2005
There are three crayfish species present in Latvia: the European noble crayfish (Astacus astacus), the narrow-clawed crayfish (Astacus leptodactylus), and the North-American signal crayfish (Pacifastacus leniusculus) species. Probably only noble crayfish
ARENS A., TAUGBØL T.
doaj   +1 more source

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