Status and management of noble crayfish<i>Astacus astacus</i>in Estonia

Paaver, Tiit; Hurt, M.

doi:10.1051/kmae/2010012

Cited by 10 publications

(6 citation statements)

References 5 publications

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“…comm.). Unfortunately, one of these is located in a noble crayfish-rich island Saaremaa (Paaver and Hurt, 2009 (Cukerzis, 1979) and to former Czechoslovakia in 1980 (Policar and Kozák, 2000). Signal crayfish are particularly widespread in Sweden, Finland and England.…”

Section: Figure 7 Distribution Of Pacifastacus Leniusculus (Signal Crmentioning

confidence: 99%

Continental-wide distribution of crayfish species in Europe: update and maps

Kouba

Petrusek

Kozák

2014

Knowl. Managt. Aquatic Ecosyst.

268

312

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Key-words: crayfish distribution, indigenous species, invasive species, native range, mapsRecently published astacological studies substantially improved available data on distribution of crayfish in various European regions. At the same time, spread of invasive species has been recorded, additional nonindigenous species became established in various countries, and losses of populations of native species due to crayfish plague and other negative factors were observed. We overview recent advances in this knowledge, and provide updated colour maps of the distribution of all crayfish species present in Europe. These maps are originally based on the data from the Atlas of Crayfish in Europe published in 2006 as a result of the CRAYNET project, and were further updated from more recently published reports, grey literature, and especially thanks to contributions and feedback of over 70 specialists from 32 countries. Separate maps are available for all indigenous crayfish species in Europe as well as for three most widespread non-indigenous crayfish species. Additionally, two maps give locations of known findings of crayfish species introduced to Europe after 1980. These newly established alien species have so far restricted distributions; however, the frequency of recent reports suggests that findings of such species resulting from releases of aquarium pets will further increase. RÉSUMÉ Répartition à l'échelle continentale des espèces d'écrevisses en Europe : mises à jour et cartes Mots-clés :distribution des écrevisses, espèces indigènes, espèces envahissantes, Les études astacologiques récemment publiées ont sensiblement amélioré les données disponibles sur la distribution des écrevisses dans les différentes régions européennes. Dans le même temps, la propagation des espèces envahissantes a été enregistrée, des espèces non indigènes supplémentaires se sont établies dans différents pays, et des pertes de populations d'espèces indigènes en raison de la peste des écrevisses et d'autres facteurs négatifs ont été observées. Nous synthétisons les progrès récents dans la connaissance, et fournissons des cartes en couleur mises à jour de la distribution de toutes les espèces d'écre-visses présentes en Europe. Ces cartes sont à l'origine basées sur les données de l'Atlas des écrevisses en Europe publié en 2006 à la suite du projet CRAYNET, et ont ensuite été mises à jour à partir des études publiées plus récemment, de la

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Section: Figure 7 Distribution Of Pacifastacus Leniusculus (Signal Crmentioning

confidence: 99%

Continental-wide distribution of crayfish species in Europe: update and maps

Kouba

Petrusek

Kozák

2014

Knowl. Managt. Aquatic Ecosyst.

268

312

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“…When the crayfish plague hit central Europe at the turn of the 19th century, noble crayfish were imported in large quantities from eastern European countries (Skurdal & Taugbøl, 2002). Also, noble crayfish farms operate today in several European countries, especially in central and northern Europe (Jussila & Mannonen, 2004;Paaver & Hurt, 2009) where crayfish are sold as a food source, as stock for private ponds or as donors for restocking programmes in response to rapidly declining stocks. Stocking of natural populations often occurs without knowing the genetic status of the stocking material (Souty-Grosset, Grandjean & Gouin, 2003).…”

Section: Introductionmentioning

confidence: 99%

Phylogeography of noble crayfish (Astacus astacus) reveals multiple refugia

et al. 2013

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Summary Reconstructing the phylogeographic history of a species can aid in defining areas of conservation priority. For freshwater species, historical river structure plays a significant role in explaining genetic differentiation and population structure. However, human‐induced translocations can erase the natural genetic structure, especially for species of commercial interest such as the noble crayfish (Astacus astacus). Our aim was to reconstruct the current genetic structure of the endangered noble crayfish in central Europe to identify refugial areas that are hotspots of genetic diversity. We analysed a fragment of the mitochondrial cytochrome oxidase subunit I, and the 16S rRNA from 540 noble crayfish specimens from 156 sampling sites distributed around five European sea basins. Additionally, we conducted a microsatellite analysis of 289 individuals from 22 sites. Both mitochondrial and nuclear markers revealed genetically relatively homogenous populations in central Europe that had been influenced by anthropogenic translocations. However, some areas (Eider catchment in northern Germany and Rhineland‐Palatinate in south‐western Germany) show a distinct genetic structure with endemic haplotypes and private alleles indicating (i) that these areas were refugia for A. astacus in central Europe and (ii) that these populations have not been subject to anthropogenic translocations. Further, we found the highest genetic diversity in the Black Sea basin and particularly high differentiation between populations from the western Balkans and the remaining Black Sea populations. The split between Western Balkan and the remaining European populations is estimated to have occurred approximately 700 k years before present, whereas remaining differentiations occurred within the last 450 k years. Using migration modelling, we detected that the North Sea basin and the Baltic Sea basin were colonised independently via different colonisation paths from the eastern Black Sea basin, while the western Balkans did not contribute to this colonisation. Our results suggest the existence of at least two refugial areas in south‐eastern Europe. To conserve maximum genetic diversity, conservation priorities for noble crayfish should focus on the south‐eastern European genetic hotspots and on populations in central Europe that hold an autochthonous genetic structure (e.g. Langsee in the Eider catchment area). We further propose that each river catchment should form a separate management unit to reduce anthropogenic genetic homogenisation.

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“…The character of distribution of narrow-clawed crayfish suggests that, historically, this species have not been a native in Latvia. Narrow-clawed crayfish have not been found further to the north from Latvia in Estonia (Paaver, Hurt 2010;Kouba et al 2014). The presumed native range of the species includes Pontocaspian river basins (Kouba et al 2014).…”

Section: Resultsmentioning

confidence: 99%

Alien crayfish species in Latvian inland waters

2019

EEB

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Survey of data on Latvian freshwater crayfish species distribution and occurrence in different waterbodies (404 lakes, 368 rivers and 47 reservoirs, nine quarry reservoirs) across the territory in the last decades from 1988 to 2018 were performed with the aim to compare field data with previous research, inquiries and grey data. The most frequently occurring species was native noble crayfish Astacus astacus and the introduced narrow-clawed crayfish Astacus leptodactylis, with incidence of 26 and 5% from surveyed waterbodies, respectively. The invasive alien crayfish species Orconectes limosus and Pacifastacus leniusculus occured in 23 (2.8%) and 10 (1.2%) of waterbodies, respectively. The history of invasion of alien crayfish species was analysed. Survey results demonstrated that in the last decades noble crayfish occurrence decreased, or their presence was not detected due to low population density. The occurrence of other species, especially invasive spiny-cheek crayfish, was increasing.

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Status and management of noble crayfishAstacus astacusin Estonia

Cited by 10 publications

References 5 publications

Continental-wide distribution of crayfish species in Europe: update and maps

Continental-wide distribution of crayfish species in Europe: update and maps

Phylogeography of noble crayfish (Astacus astacus) reveals multiple refugia

Alien crayfish species in Latvian inland waters

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