Karyotypes and Morphological Variability of Crayfish Pontastacus Leptodactylus and P. Angulosus (Malacostraca, Decapoda)

Kostyuk, V. S.; Garbar, A. V.; Mezhzherin, S. V.

doi:10.2478/vzoo-2013-0020

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…The assumption stems from morphology-based concept applied by Eastern European astacologists, who often separate narrow-clawed crayfish (sensu lato) from A. astacus into a genus Pontastacus comprising different number of species (Starobogatov, 1995;Śmietana et al, 2006). Further studies on morphometric, meristic (Maguire and Dakić, 2011), cytologic (Kostyuk et al, 2013) and molecular aspects (Maguire et al, 2014) may in the near future reconcile the differing views on A. leptodactylus. Until this issue gets resolved by application of modern integrative taxonomic approaches, we find it most convenient to present in the maps the distribution of the narrow-clawed crayfish in a wide sense.…”

Section: > Astacus Leptodactylus Sensu Lato; Narrow-clawed Crayfish (mentioning

confidence: 91%

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

Kouba

Petrusek

Kozák

2014

Knowl. Managt. Aquatic Ecosyst.

276

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: > Astacus Leptodactylus Sensu Lato; Narrow-clawed Crayfish (mentioning

confidence: 91%

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

Kouba

Petrusek

Kozák

2014

Knowl. Managt. Aquatic Ecosyst.

276

312

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“…To a large extent, this is reflective of the fact that decapod crustaceans, and freshwater crayfish in particular, have a low mitotic index, a high diploid chromosome number, small chromosomes, and highly repetitive genomic elements (Tan et al, 2004 , 2019 , 2020 ; Mlinarec et al, 2011 ; Gutekunst et al, 2018 ; Van Quyen et al, 2020 ). Therefore, cytogenetic studies on freshwater crayfish species are rare, often limited to the report of chromosome number and structure, with very few reports on molecular cytogenetics (Tan et al, 2004 ; Indy et al, 2010 ; Scalici et al, 2010 ; Mlinarec et al, 2011 , 2016 ; Kostyuk et al, 2013 ; Salvadori et al, 2014 ) ( Table 1 ).…”

Section: Introductionmentioning

confidence: 99%

The Pontastacus leptodactylus (Astacidae) Repeatome Provides Insight Into Genome Evolution and Reveals Remarkable Diversity of Satellite DNA

et al. 2021

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Pontastacus leptodactylus is a native European crayfish species found in both freshwater and brackish environments. It has commercial importance for fisheries and aquaculture industries. Up till now, most studies concerning P. leptodactylus have focused onto gaining knowledge about its phylogeny and population genetics. However, little is known about the chromosomal evolution and genome organization of this species. Therefore, we performed clustering analysis of a low coverage genomic dataset to identify and characterize repetitive DNA in the P. leptodactylus genome. In addition, the karyogram of P. leptodactylus (2n = 180) is presented here for the first time consisting of 75 metacentric, 14 submetacentric, and a submetacentric/metacentric heteromorphic chromosome pair. We determined the genome size to be at ~18.7 gigabase pairs. Repetitive DNA represents about 54.85% of the genome. Satellite DNA repeats are the most abundant type of repetitive DNA, making up to ~28% of the total amount of repetitive elements, followed by the Ty3/Gypsy retroelements (~15%). Our study established a surprisingly high diversity of satellite repeats in P. leptodactylus. The genome of P. leptodactylus is by far the most satellite-rich genome discovered to date with 258 satellite families described. Of the five mapped satellite DNA families on chromosomes, PlSAT3-411 co-localizes with the AT-rich DAPI positive probable (peri)centromeric heterochromatin on all chromosomes, while PlSAT14-79 co-localizes with the AT-rich DAPI positive (peri)centromeric heterochromatin on one chromosome and is also located subterminally and intercalary on some chromosomes. PlSAT1-21 is located intercalary in the vicinity of the (peri)centromeric heterochromatin on some chromosomes, while PlSAT6-70 and PlSAT7-134 are located intercalary on some P. leptodactylus chromosomes. The FISH results reveal amplification of interstitial telomeric repeats (ITRs) in P. leptodactylus. The prevalence of repetitive elements, especially the satellite DNA repeats, may have provided a driving force for the evolution of the P. leptodactylus genome.

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“…Samples of crayfi sh were collected from various places in Ukraine (see map, fi g.1) during the years 2010-2013. Th e presence of four species of this genus has previously been established on the basis of morphometry, allozyme data (Mezhzherin et al, 2012) and karyotypes (Kostyuk et al, 2013). In total 10 specimens of Astacus pachypus (Rathke, 1837), 42 of A. astacus, 267 of A. angulosus and 227 of A. leptodactylus were studied.…”

Section: Methodsmentioning

confidence: 99%

The Thick-clawed Crayfish, Astacus pachypus (Crustacea, Decapoda, Astacidae), in Ukraine: Karyotype, Allozymes and Morphological Parameters / Толстопалый рак, Astacus pachypus (Crustacea, Decapoda, Astacidae), в Украине: кариотип, ал- лозимы и морфологические параметры

Mezhzherin¹,

Kostyuk²,

Garbar³

et al. 2015

Vestnik Zoologii

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Allozymic, karyological and morphological analyzes confirmed the presence of the Thick-clawed crayfish, Astacus pachypus (Rathke, 1837), in Ukraine. Th is rare species in Ukraine is found only in two small adjacent localities restricted to the Lower Dnieper. It is characterized by a unique set of chromosomes (2n = 116) and a distinct pool of allozymes, allowing, together with morphological features, to clearly distinguish it from the other three species of the Ukrainian fauna.

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Karyotypes and Morphological Variability of Crayfish Pontastacus Leptodactylus and P. Angulosus (Malacostraca, Decapoda)

Cited by 6 publications

References 2 publications

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

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

The Pontastacus leptodactylus (Astacidae) Repeatome Provides Insight Into Genome Evolution and Reveals Remarkable Diversity of Satellite DNA

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