scholarly journals THE DISPERSION OF THE APHANOMYCES ASTACI-CARRIER PACIFASTACUS LENIUSCULUS BY HUMANS REPRESENTS THE MAIN CAUSE OF DISAPPEARANCE OF THE INDIGENOUS CRAYFISH AUSTROPOTAMOBIUS PALLIPES IN NAVARRA

2006 ◽  
pp. 1303-1312 ◽  
Author(s):  
J. DIÉGUEZ-URIBEONDO
Keyword(s):  
Pacifastacus Leniusculus ◽  
Austropotamobius Pallipes ◽  
Aphanomyces Astaci

scholarly journals Should Redclaw Crayfish be introduced to Fiji?

1995 ◽  
Vol 2 (4) ◽  
pp. 312
Author(s):  
Roger Lowery
Keyword(s):  
Pacifastacus Leniusculus ◽  
River Systems ◽  
Cherax Quadricarinatus ◽  
Austropotamobius Pallipes ◽  
Aphanomyces Astaci ◽  
Large Populations ◽  
New Locations ◽  
The Uk ◽  
Native Crayfish ◽  
Redclaw Crayfish

Whenever a new organism comes on the aquaculture scene there is a rush to try it out and to introduce the species to new locations. Such was the case with Pacifastacus leniusculus in Europe in the early 1980s. In the UK there was at the time no legislation to control such introductions and commercial pressures ensured that the species was soon widely distributed throughout the UK. One consequence was the introduction of the Crayfish Plague Aphanomyces astaci which resulted in the destruction of large populations of the native crayfish Austropotamobius pallipes in several river systems. It was against this background that I came to learn of a proposal to introduce Cherax quadricarinatus to Fiji in 1991. The commercial proposal was put to the Department of Fisheries who were considering accepting it when, on the basis of experience with crayfish in the UK, I proposed that there should be a delay while the species was evaluated for its likely effect on the Fijian fauna.

Relaxed attitude towards spreading of alien crayfish species affects protection of native crayfish species: case studies and lessons learnt from a Fennoscandian viewpoint

2020 ◽  
Vol 25 (1) ◽  
pp. 39-46
Author(s):  
Japo Jussila ◽  
Lennart Edsman
Keyword(s):  
Competitive Advantage ◽  
Pacifastacus Leniusculus ◽  
Astacus Astacus ◽  
Signal Crayfish ◽  
Aphanomyces Astaci ◽  
Noble Crayfish ◽  
Native Crayfish ◽  
Chronic Carrier ◽  
Highly Virulent ◽  
Crayfish Species

Abstract The spreading of the alien signal crayfish (Pacifastacus leniusculus) is posing an ongoing threat to native European crayfish species in Fennoscandia, like the native noble crayfish (Astacus astacus). The signal crayfish is commonly a chronic carrier of the crayfish plague (Aphanomyces astaci), thus, in addition to being more competitive than noble crayfish, it also has a competitive advantage in this disease over the noble crayfish. The challenges rising from the introduction of the alien signal crayfish to Sweden, Finland and finally also Norway, are similar in nature. The licensed and unlicensed spreading of this species also has a similar history in these countries. In this paper we describe some of the patters of the spread of alien signal crayfish and highlight the detrimental nature of an alien crayfish, accompanied by a highly virulent disease, to native Fennoscandian crayfish and also to native Fennoscandian ecosystems. A halt to the further spreading of alien signal crayfish in Fennoscandia is the only means to ensure successful conservation outcomes for the noble crayfish.

Niche modelling to guide conservation actions in France for the endangered crayfish Austropotamobius pallipes in relation to the invasive Pacifastacus leniusculus

2019 ◽  
Vol 65 (2) ◽  
pp. 304-315
Author(s):  
Clémentine Préau ◽  
Iris Nadeau ◽  
Yann Sellier ◽  
Francis Isselin‐Nondedeu ◽  
Romain Bertrand ◽  
...  
Keyword(s):  
Pacifastacus Leniusculus ◽  
Niche Modelling ◽  
Austropotamobius Pallipes ◽  
Conservation Actions

Prevalence of the crayfish plague, Aphanomyces astaci Schikora, in alien crayfish species in Japan

2020 ◽  
Vol 25 (1) ◽  
pp. 31-37
Author(s):  
Kensuke Kamimura ◽  
Tadashi Kawai
Keyword(s):  
Water Temperature ◽  
Procambarus Clarkii ◽  
Severe Disease ◽  
Pacifastacus Leniusculus ◽  
Infection Prevalence ◽  
Infection Status ◽  
Aphanomyces Astaci ◽  
Invasive Crayfish ◽  
The Relationship ◽  
Crayfish Species

Abstract Crayfish plague is a severe disease of crayfish that is caused by the oomycete Aphanomyces astaci. Two crayfish hosts of this parasite, Procambarus clarkii and Pacifastacus leniusculus, were imported from North America into Japan and were found to be infected with this parasite. Since the endemic Japanese crayfish, Cambaroides japonicus, has a low resistance to the crayfish plague, infection with this parasite will likely lead to crayfish death. Specimens of both invasive crayfish species were collected across Japan and their infection status was examined using a PCR technique. Aphanomyces astaci was detected in all localities and the average infection prevalence was 67%. Additionally, when the signs of melanization were compared with the results from PCR analyses, it suggested that the DNA detection procedure is more reliable than observation of tissue melanization. Moreover, the relationship between prevalence and water temperature in the field was analyzed, indicated that water temperature influenced the prevalence of A. astaci infection.

Eroded Swimmeret Syndrome: Update of the Current Knowledge

2021 ◽  
Vol 26 (1) ◽  
pp. 63-68
Author(s):  
Jappo Jussila ◽  
Vesa Tiitinen ◽  
Jenny Makkonen ◽  
Harri Kokko ◽  
Patrik Bohman ◽  
...  
Keyword(s):  
Species Complex ◽  
Current Knowledge ◽  
Fusarium Species ◽  
Pacifastacus Leniusculus ◽  
Multiple Infection ◽  
Signal Crayfish ◽  
Aphanomyces Astaci ◽  
Disease Agent ◽  
Lake Saimaa ◽  
Swedish Data

Abstract Eroded swimmeret syndrome (ESS) was first described in 2014 from Swedish signal crayfish (Pacifastacus leniusculus (Dana)), and later also from Finland, with gross symptoms and disease agent candidates identified and described by 2015. The ESS was first discovered affecting alien signal crayfish in Fennoscandia. The ESS is caused by a multiple infection involving Aphanomyces astaci (Schikora) and Fusarium species complex (SC). The ESS symptoms include first melanised spots in swimmerets, then partial swimmeret erosion and finally loss of a swimmeret. There could be a total loss of all swimmerets in the most severe cases. Both females and males can be affected by the ESS. In females, the ESS lowers reproductive success while in males the ESS often causes erosion of the gonopods and thus possible partial failure in mating. The ESS is more frequent among mature females that have reproduced once compared to immature females or those that are mature but have not yet reproduced. The proportion of females with ESS has ranged from 10 to 50% among Lake Saimaa signal crayfish in Finland and in a wider survey from Sweden the range was from 0 to 38%. Among Lake Saimaa male signal crayfish, the ESS proportion has been less than 10%, while it was only 0.6% in the Swedish data. The ESS has also been observed among alien signal crayfish in Switzerland. There are recent observations of ESS affecting narrow-clawed crayfish, Pontastacus leptodactylus (Eschscholtz), in Croatia and Romania (i.e., among native European crayfish stocks). Here, we summarise current knowledge about the ESS and speculate on a few potentially crucial impacts of this syndrome.

scholarly journals Resistance to the crayfish plague, Aphanomyces astaci (Oomycota) in the endangered freshwater crayfish species, Austropotamobius pallipes

PLoS ONE ◽  
2017 ◽  
Vol 12 (7) ◽  
pp. e0181226 ◽  
Author(s):  
Laura Martín-Torrijos ◽  
Miquel Campos Llach ◽  
Quim Pou-Rovira ◽  
Javier Diéguez-Uribeondo
Keyword(s):  
Freshwater Crayfish ◽  
Austropotamobius Pallipes ◽  
Aphanomyces Astaci ◽  
Crayfish Species
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