Abstract
Freshwater ecosystems are particularly vulnerable to biological invasions; the aquatic animal pet trade has been recognized as a significant pathway of introductions. Crayfish are considered a model group of traded organisms with a series of highly successful species already established in the wild, having the potential to negatively influence both indigenous crayfish species (ICS) as well as alter occupied ecosystems. Eastern Europe includes the entire native ranges of indigenous Astacus leptodactylus sensu lato and A. pachypus. This region has been largely overlooked and considered relatively safe from the adverse impacts of non-indigenous crayfish species (NICS). In this study, we evaluated the crayfish pet trade in the Lower Volga Region with special emphasis on Astrakhan, the biggest city of Russian Federation in the region located just in the delta of Volga River, thus being a potential gateway of introductions to the Caspian Sea and adjacent freshwaters. The local pet trade involves 12 NICS. Considering their origin, availability, probability of establishment, invasiveness and further aspects, Procambarus fallax f. virginalis, P. clarkii and Cherax destructor are considered potentially the most problematic, including transmission of diseases like crayfish plague caused by Aphanomyces astaci or white spot syndrome virus. Taking this information as a whole, the availability of NICS with a high probability of overlapping the entire range of European ICS means that attention is warranted. Further research is needed to corroborate the abilities of NICS and their associated diseases to withstand specific conditions of the Caspian Sea as well as the adjacent Black and Azov Seas, all possessing different degrees of elevated salinity.
Similar content being viewed by others
References
Ackefors HE (2000) Freshwater crayfish farming technology in the 1990s: a European and global perspective. Fish Fish 1:337–359. doi:10.1046/j.1467-2979.2000.00023.x
Ahyong ST, Yeo DC (2007) Feral populations of the Australian red-claw crayfish (Cherax quadricarinatus von Martens) in water supply catchments of Singapore. Biol Invasions 9:943–946. doi:10.1007/s10530-007-9094-0
Austin C (1995) Effect of temperature and salinity on the survival and growth of juvenile redclaw (Cherax quadricarinatus). Freshw Crayfish 10:419–426
Beatty S, Morgan D, Gill H (2005) Role of life history strategy in the colonisation of Western Australian aquatic systems by the introduced crayfish Cherax destructor Clark, 1936. Hydrobiologia 549:219–237. doi:10.1007/s10750-005-5443-0
Belle CC, Wong JQ, Yeo DC, Tan S, Tan HH, Clews E, Todd PA (2011) Ornamental trade as a pathway for Australian redclaw crayfish introduction and establishment. Aquat Biol 12:69–79. doi:10.3354/ab00324
Berdnikov S, Selyutin V, Vasilchenko V, Caddy J (1999) Trophodynamic model of the Black and Azov Sea pelagic ecosystem: consequences of the comb jelly, Mnemiopsis leydei, invasion. Fish Res 42:261–289. doi:10.1016/S0165-7836(99)00049-1
Bissattini AM, Traversetti L, Bellavia G, Scalici M (2015) Tolerance of increasing water salinity in the red swamp crayfish Procambarus clarkii (Girard, 1852). J Crustac Biol 35:682–685. doi:10.1163/1937240X-00002366
Bláha M, Patoka J, Kozák P, Kouba A (2016) Unrecognized diversity in New Guinean crayfish species (Decapoda, Parastacidae): the evidence from molecular data. Integr Zool. doi:10.1111/1749-4877.12211
Bohman P, Edsman L, Martin P, Scholtz G (2013) The first Marmorkrebs (Decapoda: Astacida: Cambaridae) in Scandinavia. BioInvasions Rec 2:227–232. doi:10.3391/bir.2013.2.3.09
Capinha C, Larson ER, Tricarico E, Olden JD, Gherardi F (2013) Effects of climate change, invasive species, and disease on the distribution of native European crayfishes. Conserv Biol 27:731–740
Casellato S, Masiero L (2011) Does Procambarus clarkii (Girard, 1852) represent a threat for estuarine brackish ecosystems of Northeastern Adriatic Coast (Italy)? J Life Sci 5:549–554
Chapin FS III et al (2000) Consequences of changing biodiversity. Nature 405:234–242. doi:10.1038/35012241
Chucholl C (2013) Invaders for sale: trade and determinants of introduction of ornamental freshwater crayfish. Biol Invasions 15:125–141. doi:10.1007/s10530-012-0273-2
Chucholl C (2014) Predicting the risk of introduction and establishment of an exotic aquarium animal in Europe: insights from one decade of Marmorkrebs (Crustacea, Astacida, Cambaridae) releases. Manag Biol Invasions 5:309–318
Chucholl C, Wendler F (2017) Positive selection of beautiful invaders: long-term persistence and bio-invasion risk of freshwater crayfish in the pet trade. Biol Invasions 19:197–208. doi:10.1007/s10530-016-1272-5
Chucholl C, Morawetz K, Gross H (2012) The clones are coming—strong increase in Marmorkrebs Procambarus fallax (Hagen, 1870) f. virginalis records from Europe. Aquat Invasions 7:511–519. doi:10.3391/ai.2012.7.4.008
Coughran J, Daly G (2012) Potential threats posed by a translocated crayfish: the case of Cherax destructor in coastal drainages of New South Wales, Australia. Crustac Res Special Number 7:5–13
D’Agaro E, De Luise G, Lanari D (1999) The current status of crayfish farming in Italy. Freshw Crayfish 12:506–517
Diéguez-Uribeondo J, Huang TS, Cerenius L, Soderhall K (1995) Physiological adaptation of an Aphanomyces astaci strain isolated from the freshwater crayfish Procambarus clarkii. Mycol Res 99:574–578. doi:10.1016/s0953-7562(09)80716-8
Duggan IC (2010) The freshwater aquarium trade as a vector for incidental invertebrate fauna. Biol Invasions 12:3757–3770. doi:10.1007/s10530-010-9768-x
Edgerton BF et al (2004) Understanding the causes of disease in European freshwater crayfish. Conserv Biol 18:1466–1474. doi:10.1111/j.1523-1739.2004.00436.x
Elvey W, Richardson A, Barmuta L (1997) Interactions between the introduced yabby, Cherax destructor, and the endemic crayfish, Astacopsis franklinii, in Tasmanian streams. Freshw Crayfish 11:349–363
Faulkes Z (2013) How much is that crayfish in the window? Online monitoring of Marmorkrebs, Procambarus fallax f. virginalis (Hagen, 1870) in the North American pet trade. Freshw Crayfish 19:39–44
Faulkes Z (2015a) The global trade in crayfish as pets. Crustac Res 44:75–92
Faulkes Z (2015b) Marmorkrebs (Procambarus fallax f. virginalis) are the most popular crayfish in the North American pet trade. Knowl Manag Aquat Ecosyst 416:20. doi:10.1051/kmae/2015016
Feria TP, Faulkes Z (2011) Forecasting the distribution of Marmorkrebs, a parthenogenetic crayfish with high invasive potential, in Madagascar, Europe, and North America. Aquat Invasions 6:55–67. doi:10.3391/ai.2011.6.1.07
Filippova IN (2004) The economic efficiency of rearing the gigantic freshwater prawn in the Astrakhan region. Vestnik of Astrakhan State Technical University Series. Economics 3:68–71
Hall CM (2010) Tourism and biodiversity: more significant than climate change? J Herit Tour 5:253–266. doi:10.1080/1743873X.2010.517843
Hijmans RJ, Cameron SE, Parra JL, Jones PG, Jarvis A (2005) Very high resolution interpolated climate surfaces for global land areas. Int J Climatol 25:1965–1978. doi:10.1002/joc.1276
Holdich DM, Reynolds JD, Souty-Grosset C, Sibley PJ (2009) A review of the ever increasing threat to European crayfish from non-indigenous crayfish species. Knowl Manag Aquat Ecosyst 394–395:11. doi:10.1051/kmae/2009025
Huner JV, Barr J, Coleman EB (1984) Red swamp crawfish: biology and exploitation. Louisiana Sea Grant College Program, Center for Wetland Resources, Louisiana State University, Louisiana
Jaklič M, Vrezec A (2011) The first tropical alien crayfish species in European waters: the redclaw Cherax quadricarinatus (Von Martens, 1868) (Decapoda, Parastacidae). Crustaceana 84:651–665. doi:10.1163/001121611X577936
Jazdzewski K, Konopacka A (2002) Invasive Ponto-Caspian species in waters of the Vistula and Oder basins and the southern Baltic Sea. In: Leppäkoski E, Gollasch S, Olenin S (eds) Invasive aquatic species of Europe. Distribution, impacts and management. Springer, Berlin, pp 384–398
Jiravanichpaisal P, Söderhäll K, Söderhäll I (2004) Effect of water temperature on the immune response and infectivity pattern of white spot syndrome virus (WSSV) in freshwater crayfish. Fish Shellfish Immunol 17:265–275. doi:10.1016/j.fsi.2004.03.010
Kalous L, Patoka J, Kopecký O (2015) European hub for invaders: risk assessment of freshwater aquarium fishes exported from the Czech Republic. Acta Ichthyol Piscat 45:239–245. doi:10.3750/AIP2015.45.3.02
Keller N, Pfeiffer M, Roessink I, Schulz R, Schrimpf A (2014) First evidence of crayfish plaque agent in populations of the marbled caryfish (Procambarus fallax forma virginalis). Knowl Manag Aquat Ecosyst 414:8. doi:10.1051/kmae/2014032
Kiran R, Rajendran K, Jung S, Oh M (2002) Experimental susceptibility of different life-stages of the giant freshwater prawn, Macrobrachium rosenbergii (de Man), to white spot syndrome virus (WSSV). J Fish Dis 25:201–207. doi:10.1046/j.1365-2761.2002.00357.x
Koese B (2008) Rivierkreeften proeftabel. Naturalis, Leiden
Kopecký O, Patoka J, Kalous L (2016) Establishment risk and potential invasiveness of the selected exotic amphibians from pet trade in the European Union. J Nat Conserv 31:22–28. doi:10.1016/j.jnc.2016.02.007
Kotovska G, Khrystenko D, Patoka J, Kouba A (2016) East European crayfish stocks at risk: arrival of non-indigenous crayfish species. Knowl Manag Aquat Ecosyst 417:37. doi:10.1051/kmae/2016024
Kouba A, Petrusek A, Kozák P (2014) Continental-wide distribution of crayfish species in Europe: update and maps. Knowl Manag Aquat Ecosyst 413:5. doi:10.1051/kmae/2014007
Kouba A et al (2016) The significance of droughts for hyporheic dwellers: evidence from freshwater crayfish. Sci Rep 6:26569
Kozubíková E, Petrusek A, Ďuriš Z, Martin MP, Dieguez-Uribeondo J, Oidtmann B (2008) The old menace is back: recent crayfish plague outbreaks in the Czech Republic. Aquaculture 274:208–217. doi:10.1016/j.aquaculture.2007.11.015
Lagutkina LY, Ponomarev SV (2008) New object of aquaculture—Australian redclaw crayfish (Cherax quadricarinatus). Vestnik of Astrakhan State Technical University Series. Fish Ind 47:220–223
Lagutkina LY, Martyanov AS, Stepanov RV, Sheikhgasanov GK (2016) Optimization of the technology of feeding Australian crayfish through the use of experimental feeds formulas. Vestnik of Astrakhan State Technical University Series. Fish Ind 1:77–87
Lightner DV et al (2012) Historic emergence, impact and current status of shrimp pathogens in the Americas. J Invertebr Pathol 110:174–183. doi:10.1016/j.jip.2012.03.006
Lipták B, Vitázková B (2015) Beautiful, but also potentially invasive. Ekológia 34:155–162. doi:10.1515/eko-2015-0016
Lipták B, Mrugała A, Pekárik L, Mutkovič A, Gruľa D, Petrusek A, Kouba A (2016) Expansion of the marbled crayfish in Slovakia: beginning of an invasion in the Danube catchment? J Limnol 75:305–312. doi:10.4081/jlimnol.2016.1313
Lőkkös A, Müller T, Kovács K, Várkonyi L, Specziár A, Martin P (2016) The alien, parthenogenetic marbled crayfish (Decapoda: Cambaridae) is entering Kis-Balaton (Hungary), one of Europe’s most important wetland biotopes. Knowl Manag Aquat Ecosyst 417:16. doi:10.1051/kmae/2016003
Longshaw M (2011) Diseases of crayfish: a review. J Invertebr Pathol 106:54–70. doi:10.1016/j.jip.2010.09.013
Longshaw M, Bateman KS, Stebbing P, Stentiford GD, Hockley FA (2012) Disease risks associated with the importation and release of non-native crayfish species into mainland Britain. Aquat Biol 16:1–15. doi:10.3354/ab00417
Lowe S, Browne M, Boudjelas S, De Poorter M (2000) 100 of the world’s worst invasive alien species: a selection from the global invasive species database. Invasive Species Specialist Group, Auckland
Meade ME, Doeller JE, Kraus D, Watts SA (2002) Effects of temperature and salinity on weight gain, oxygen consumption rate, and growth efficiency in juvenile red-claw crayfish Cherax quadricarinatus. J World Aquacult Soc 33:188–198. doi:10.1111/j.1749-7345.2002.tb00494.x
Meineri E, Rodriguez-Perez H, Hilaire S, Mesleard F (2014) Distribution and reproduction of Procambarus clarkii in relation to water management, salinity and habitat type in the Camargue. Aquat Conserv Mar Freshw Ecosyst 24:312–323. doi:10.1002/aqc.2410
Mills B, Geddes M (1980) Salinty tolerance and osmoregulation of the Australian freshwater crayfish Cherax destructor Clark (Decapoda: Parastacidae). Mar Freshw Res 31:667–676. doi:10.1071/MF9800667
Monticini P (2010) The ornamental fish trade: production and commerce of ornamental fish: technical–managerial and legislative aspects. Food and Agriculture Organization of the United Nations, Rome
Moorhouse TP, Macdonald DW (2015) Are invasives worse in freshwater than terrestrial ecosystems? WIREs Water 2:1–8. doi:10.1002/wat2.1059
Mrugała A, Kozubíková-Balcarová E, Chucholl C, Resino SC, Viljamaa-Dirks S, Vukić J, Petrusek A (2015) Trade of ornamental crayfish in Europe as a possible introduction pathway for important crustacean diseases: crayfish plague and white spot syndrome. Biol Invasions 17:1313–1326. doi:10.1007/s10530-014-0795-x
Mrugała A, Veselý L, Petrusek A, Viljamaa-Dirks S, Kouba A (2016) May Cherax destructor contribute to Aphanomyces astaci spread in Central Europe? Aquat Invasions 11:459–468. doi:10.3391/ai.2016.11.4.10
New MB (2000) Commercial freshwater prawn farming around the world. In: New MB, Valenti WC (eds) Freshwater prawn culture: the farming of Macrobrachium rosenbergii. Wiley, Hoboken, pp 290–325
Nonnis Marzano F, Scalici M, Chiesa S, Gherardi F, Piccinini A, Gibertini G (2009) The first record of the marbled crayfish adds further threats to fresh waters in Italy. Aquat Invasions 4:401–404. doi:10.3391/ai.2009.4.2.19
Novitsky R, Son M (2016) The first records of Marmorkrebs [Procambarus fallax (Hagen, 1870) f. virginalis] (Crustacea, Decapoda, Cambaridae) in Ukraine. Ecol Montenegrina 5:44–46
Ovsyannikova EV, Krutchkov VN (2004) Influence of abiotic factors on the growth and surviving of larvae of gigantic freshwater shrimp Macrobrachium rosenbergii in conditions of its commercial growing. Vestnik of Astrakhan State Technical University Series. Economics 21:181–184
Padilla DK, Williams SL (2004) Beyond ballast water: aquarium and ornamental trades as sources of invasive species in aquatic ecosystems. Front Ecol Environ 2:131–138. doi:10.1890/1540-9295(2004)002[0131:BBWAAO]2.0.CO;2
Paillisson J-M, Soudieux A, Damien J-P (2011) Capture efficiency and size selectivity of sampling gears targeting red-swamp crayfish in several freshwater habitats. Knowl Manag Aquat Ecosyst 401:6. doi:10.1051/kmae/2011015
Panteleit J, Keller NS, Kokko H, Jussila J, Makkonen J, Theissinger K, Schrimpf A (2017) Investigation of ornamental crayfish reveals new carrier species of the crayfish plague pathogen (Aphanomyces astaci). Aquat Invasions 12:77–83. doi:10.3391/ai.2017.12.1.08
Papavlasopoulou I, Vardakas L, Perdikaris C, Kommatas D, Paschos I (2013) Ornamental fish in pet stores in Greece: a threat to biodiversity? Mediterr Mar Sci 15:126–134. doi:10.12681/mms.484
Patoka J, Kalous L, Kopecký O (2014) Risk assessment of the crayfish pet trade based on data from the Czech Republic. Biol Invasions 16:2489–2494. doi:10.1007/s10530-014-0682-5
Patoka J, Bláha M, Kouba A (2015a) Cherax (Astaconephrops) gherardii, a new crayfish (Decapoda: Parastacidae) from West Papua, Indonesia. Zootaxa 3964:526–536. doi:10.11646/zootaxa.3964.5.2
Patoka J, Kalous L, Kopecký O (2015b) Imports of ornamental crayfish: the first decade from the Czech Republic’s perspective. Knowl Manag Aquat Ec 416:4. doi:10.1051/kmae/2014040
Patoka J, Bláha M, Kalous L, Vrabec V, Buřič M, Kouba A (2016a) Potential pest transfer mediated by international ornamental plant trade. Sci Rep 6:25896. doi:10.1038/srep25896
Patoka J et al (2016b) Predictions of marbled crayfish establishment in conurbations fulfilled: evidences from the Czech Republic. Biologia 71:1380–1385. doi:10.1515/biolog-2016-0164
Perdikaris C, Kozák P, Kouba A, Konstantinidis E, Paschos I (2012) Socio-economic drivers and non-indigenous freshwater crayfish species in Europe. Knowl Manag Aquat Ecosyst 404:1. doi:10.1051/kmae/2011077
Pimentel D et al (1992) Conserving biological diversity in agricultural/forestry systems. Bioscience 42:354–362. doi:10.2307/1311782
Ploeg A (2013) Trade—the status of the ornamental aquatic industry. Ornamental Fish International (OFI) 72:11–13
Pourkazemi M (2006) Caspian Sea sturgeon conservation and fisheries: past present and future. J Appl Ichthyol 22:12–16. doi:10.1111/j.1439-0426.2007.00923.x
Prymaczok N, Medesani D, Rodríguez E (2008) Levels of ions and organic metabolites in the adult freshwater crayfish, Cherax quadricarinatus, exposed to different salinities. Mar Freshw Behav Physiol 41:121–130. doi:10.1080/10236240802193893
Rani P, Immanuel S, Kumar NR (2014) Ornamental fish exports from India: performance, competitiveness and determinants. Int J Fish Aquat Stud 1:85–92
Rezinciuc S, Sandoval-Sierra J, Oidtmann B, Diéguez-Uribeondo J (2016) The biology of crayfish plague pathogen Aphanomyces astaci: current answers to most frequent questions. In: Kawai T, Faulkes Z, Scholz G (eds) Freshwater crayfish: a global overview. CRC Press, Boca Raton, pp 182–204
Samardžić M, Lucić A, Maguire I, Hudina S (2014) The first record of the marbled crayfish (Procambarus fallax (Hagen, 1870) f. virginalis) in Croatia. Crayfish News 36:4
Saoud IP, Ghanawi J, Thompson KR, Webster CD (2013) A review of the culture and diseases of redclaw crayfish Cherax quadricarinatus (von Martens 1868). J World Aquacult Soc 44:1–29. doi:10.1111/jwas.12011
Savini D, Occhipinti-Ambrogi A, Marchini A, Tricarico E, Gherardi F, Olenin S, Gollasch S (2010) The top 27 animal alien species introduced into Europe for aquaculture and related activities. J Appl Ichthyol 26:1–7. doi:10.1111/j.1439-0426.2010.01503.x
Scalici M, Chiesa S, Gherardi F, Ruffini M, Gibertini G, Marzano FN (2009) The new threat to Italian inland waters from the alien crayfish “gang”: the Australian Cherax destructor Clark, 1936. Hydrobiologia 632:341–345. doi:10.1007/s10750-009-9839-0
Scalici M, Chiesa S, Scuderi S, Celauro D, Gibertini G (2010) Population structure and dynamics of Procambarus clarkii (Girard, 1852) in a Mediterranean brackish wetland (Central Italy). Biol Invasions 12:1415–1425. doi:10.1007/s10530-009-9557-6
Schrimpf A, Parvulescu L, Copilas-Ciocianu D, Petrusek A, Schulz R (2012) Crayfish plague pathogen detected in the Danube Delta—a potential threat to freshwater biodiversity in southeastern Europe. Aquat Invasions 7:503–510. doi:10.3391/ai.2012.7.4.007
Seitz R, Vilpoux K, Hopp U, Harzsch S, Maier G (2005) Ontogeny of the Marmorkrebs (marbled crayfish): a parthenogenetic crayfish with unknown origin and phylogenetic position. J Exp Zool Part A 303A:393–405. doi:10.1002/jez.a.143
Sitnikova T, Soldatenko E, Kamaltynov R, Riedel F (2010) The finding of North American freshwater gastropods of the genus Planorbella Haldeman, 1842(Pulmonata: Planorbidae) in East Siberia. Aquat Invasions 5:201–205. doi:10.3391/ai.2010.5.2.12
Snovsky G, Galil BS (2011) The Australian redclaw crayfish Cherax quadricarinatus (von Martens, 1868) (Crustacea: Decapoda: Parastactidae) in the Sea of Galilee, Israel. Aquat Invasions 6:S29–S31. doi:10.3391/ai.2011.6.S1.007
Souty-Grosset C, Holdich DM, Noël PY, Reynolds J, Haffner P (2006) Atlas of crayfish in Europe. Muséum national d’Histoire naturelle, Paris
Souty-Grosset C, Anastácio PM, Aquiloni L, Banha F, Choquer J, Chucholl C, Tricarico E (2016) The red swamp crayfish Procambarus clarkii in Europe: impacts on aquatic ecosystems and human well-being. Limnologica 58:78–93. doi:10.1016/j.limno.2016.03.003
Stentiford G, Lightner DV (2011) Cases of white spot disease (WSD) in European shrimp farms. Aquaculture 319:302–306. doi:10.1016/j.aquaculture.2011.06.032
Stentiford G, Bonami J-R, Alday-Sanz V (2009) A critical review of susceptibility of crustaceans to Taura syndrome, yellowhead disease and white spot disease and implications of inclusion of these diseases in European legislation. Aquaculture 291:1–17. doi:10.1016/j.aquaculture.2009.02.042
Susanto GN, Charmantier G (2001) Crayfish freshwater adaptation starts in eggs: ontogeny of osmoregulation in embryos of Astacus leptodactylus. J Exp Zool 289:433–440. doi:10.1002/jez.1024
Svoboda J, Mrugała A, Kozubíková-Balcarová E, Petrusek A (2017) Hosts and transmission of the crayfish plague pathogen Aphanomyces astaci: a review. J Fish Dis 40:127–140. doi:10.1111/jfd.12472
Tricarico E, Vilizzi L, Gherardi F, Copp GH (2010) Calibration of FI-ISK, an invasiveness screening tool for nonnative freshwater invertebrates. Risk Anal 30:285–292. doi:10.1111/j.1539-6924.2009.01255.x
Turkmen G, Karadal O (2012) The survey of the imported freshwater decapod species via the ornamental aquarium trade in Turkey. J Anim Vet Adv 11:2824–2827. doi:10.3923/javaa.2012.2824.2827
Veselý L, Buřič M, Kouba A (2015) Hardy exotics species in temperate zone: can “warm water” crayfish invaders establish regardless of low temperatures? Sci Rep 5:16340. doi:10.1038/srep16340
Vilà M et al (2010) How well do we understand the impacts of alien species on ecosystem services? A pan-European, cross-taxa assessment. Front Ecol Environ 8:135–144. doi:10.1890/080083
Vinarski M, Andreev N, Andreeva S, Kazantsev I, Karimov A, Lazutkina E (2015) Alien mollusk species in the aquatic ecosystems of Western Siberia: a review. Russ J Biol Invasions 6:137–147. doi:10.1134/S2075111715030078
Vogt G (2015) Bimodal annual reproductive pattern in laboratory-reared marbled crayfish. Invertebr Reprod Dev 59:218–223. doi:10.1080/07924259.2015.1089329
Vojkovská R, Horká I, Tricarico E, Ďuriš Z (2014) New record of the parthenogenetic marbled crayfish Procambarus fallax f. virginalis from Italy. Crustaceana 87:1386–1392. doi:10.1163/15685403-00003365
Wang Q, Cheng L, Liu J, Li Z, Xie S, De Silva SS (2015) Freshwater aquaculture in PR China: trends and prospects. Rev Aquacult 7:283–302. doi:10.1111/raq.12086
Acknowledgements
This study was supported by the Internal Grant Agency of the Czech University of Life Sciences Prague “CIGA” (No. 20152007), and the Ministry of Education, Youth and Sports of the Czech Republic—projects “CENAKVA” (No. CZ.1.05/2.1.00/01.0024) and “CENAKVA II” (No. LO1205 under the NPU I program). We thank Helen Belyaeva from “Caspian Floating University” Foundation for Training and Research, Astrakhan, Russia, for assistance with establishment of the team of authors. We appreciate constructive comments of two anonymous referees. This article is dedicated to Dr. Julian D. Reynolds, a recognized member of the astacological community, for his enthusiasm, friendship and long-term support.
Author information
Authors and Affiliations
Corresponding author
Additional information
Jiří Patoka and Antonín Kouba have contributed equally to this work.
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
Vodovsky, N., Patoka, J. & Kouba, A. Ecosystem of Caspian Sea threatened by pet-traded non-indigenous crayfish. Biol Invasions 19, 2207–2217 (2017). https://doi.org/10.1007/s10530-017-1433-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10530-017-1433-1