The potential risk of hybridization with native species is likely to be limited to native Silurus species, such as the native congener S. aristotelis in Greece. After the fecundation they will defend them and will aerate them from time to time until the hatching. Freshwater Biology, 55(5):1130-1141., Britton JR, Pegg J, 2007. In contrast, O. mykiss total production was 300,000 tonnes in 2005, and the figure had risen to 700,000 tonnes in 2010 and was likely to increase (FAO, 2012; Linhart et al. This can vary from two to ten days from the deposition, depending on the water temperature. The distribution in this summary table is based on all the information available. S. glanis is in the lower range of the high risk score of FISK, although these scores are variable and likely to change in relation to the context of environmental factors affecting risk (Copp et al., 2005). Foraging is an important aspect of growth and Muscalu et al. - Raccolta di ulteriori dati sulla presenza della specie nel fiume. Siluro mostro in vertical con fireball. Options including draining of lakes, application of rotenone, capture of fish by fyke and seine netting, and electrofishing should be all reviewed in control management and risk assessment plans (Britton et al., 2009). The wels catfi sh, also called sheatfi sh ( Silurus glanis L.) is expanding very rapidly throughout the italian peninsula, com- pared to the fi rst case in Italy in 1937; in the waters of the rivers represent a real threat to native fi sh populations. Bredene, Belgium: European Aquaculture Society, 163-167. The species sometimes enters brackish water in the Black Sea and Baltic Sea (Froese and Pauly, 2012). It can be found hidden under many sunken boats or in the woodsheds (masses of brushwoods thrown in water to favour the reproduction and the growth of the fishes), in fissures of the rocks, in the impenetrable tangles of long weeds and in all the sites, mud included, that may offer a safe daytime shelter. Sexual maturity is generally 3-4 yrs, between 39-71 cm length. S. glanis exhibits cannibalism when food resources are scarce, or (Copp et al., 2009) in angling waters when there is variation in size among members of the species. Despite the great genetic differentiation of S. glanis populations, no consistent pattern of geographical structuring was revealed, in contrast to previous studies of European freshwater fish species. Possibilities of breeding catfish in ponds in Poland. Acta Scientiarum Polonorum - Piscaria, 2(1), 183-194. The male guards the eggs for the next 2-10 days (time dependent on water temperature) and makes sure the eggs are well ventilated by repeatedly fanning his tail fin, until they hatch out (Copp et al., 2009). The maximum reported length is of five metres, but the specimens presently found in Italy rarely do exceed the two, also because the bigger specimens are the oldest ones and due to its age that may reach the 80 years, clearly those present in Italy will have to grow up for some decade more before reaching record dimensions. Polish Journal of Natural Sciences, 23(4), 850-857. doi: 10.2478/v10020-008-0008-0, Kim LeeOh, Lee SangMin, 2005. ... silurus glanis. Journal of Animal and Veterinary Advances, 7(10), 1285-1291., Hadjinikolova, L., Hubenova, T., Zaikov, A., 2010. 9988).Found in deep waters of dams constructed on the lower reaches of rivers (Ref. (Black, Predator-fishing.​co.​uk 2005) Zivocisna Vyroba, 42:27-32. “Silurus glanis is a commercial fish consumed by humans. 2003; Carol et al. Preferred habitats are slow flowing lowland rivers, backwaters, shallow channels in floodplains and weed covered lakes. This fish has boneless white flesh that is low in fat and highly palatable. 2009; Rees, 2010; Hickley and Chare, 2004). Consumption of food sources is related to gape size with the larger catfish >120 cm in length consuming aquatic wildfowl and mammals in comparison to smaller counterparts of <30 cm feeding on invertebrates and molluscs. S. glanis is native to eastern Europe and western Asia (Kinzelbach, 1992), but is now established in at least seven countries to the west and south of its native range (Elvira, 2001). Secondly, catfish are opportunistic foragers, able to switch their feeding to the most suitable resource available. Dokuchaeva, S. I., 2011. Diet varies with age and size, with smaller catfish foraging on invertebrates, while larger catfish >120 cm are able to exploit a broader niche, including fish and wildfowl. S. glanis was introduced to the UK and western Europe in the nineteenth century. 1996; Ulikowski et al. Detailed coverage of invasive species threatening livelihoods and the environment worldwide. One or more of the features that are needed to show you the maps functionality are not available in the web browser that you are using. River Ebro, Spain. Proliferation has been assisted by unregulated introductions in many countries (Hickley and Chare, 2004; Clavero and Garcia-Berthou, 2006). Proceedings of the National Academy of Sciences of Belarus., Agrarian Science Series: 2:75-86. Rapid evolution of reproductive isolation in the wild: evidence from introduced salmon. There is intensive daytime use of littoral habitat, resting within dense vegetation (Copp et al., 2009). The prey that ends up between its lips has no escape. Isolation of microsatellite loci in European catfish, Silurus glanis. Weight and linear growth of wels (Silurus glanis L.) up to one month of age in aquarium rearing. Reproduction is controlled by environmental cues, e.g. Reviewers' names are available on request. Triantafyllidis et al. SiluroMania si occupa inoltre della salvaguardia del silurus glanis, diventato un vero e proprio capro espiatorio per i crimini compiuti dall'uomo nell'ambiente. Journal of Fish Biology, 63:131-143. Bangkok, Thailand and Rome, Italy: Network of Aquaculture Centres in AsiaPacific and FAO, Bangkok & FAO Rome, 397-416., Vittas S, Drosopoulou E, Kappas I, Pantzartzi CN, Scouras ZG, 2011. Naturwissenschaften, 96(5), 631-635. doi: 10.1007/s00114-009-0511-3, Triantafyllidis A, Krieg F, Cottin C, Abatzopoulos TJ, Triantaphyllidis C, Guyomard R, 2002. Bokor, Z., Urbányi, B., Horváth, L., Müller, T., Horváth, A., 2012. Status Review Report of 5 Species of Foreign Sturgeon. Fisheries Management and Ecology, 14:263-268, Britton, J. R., Davies, G. D., Brazier, M., 2010. Concerns about accidental unregulated spread (flooding enabling spread from angling waters to watercourses and rivers) and intentional unregulated releases (for angling) imply that S. glanis introductions need to be investigated, particularly as angling and dispersal are cited as the main introduction routes for introduced fish in the UK ( Copp et al. Males mature earlier than females, with mass maturation at 3-4 yrs, 57-66 cm and 1.3-2.3 kg, in contrast to females that mature at 4 yrs at minimum length 87.05 cm (Alp et al., 2004; Froese and Pauly, 2012). During the night it roams wandering and diving the big head on the preys that the long barbels, always busy, have revealed. The database includes records of species introduced or transferred from one country to another. More information about modern web browsers can be found at A set of elongated barbels, present on both jaws, completes the characteristics of the Siluridae. Lowestoft, UK: Cefas, 32 pp. [ISBN 90-71625-03-6], Hilge, V, 1984. By closing strongly the jaws, it gradually chokes the victims closing their gills while, simultaneously, rotates them in way that the spines are not opposite to the way leading them to the stomach. The European catfish (Silurus glanis) can reach the 80 years with record size of 5 m and 300 kg. The other “accessories” are proportionally tiny: two pectoral fins little worth of the size of the fish, two small pelvic fins and a sort dorsal, at times erect to serve as pivot for a turn. In the origin countries, besides the flesh consumed fresh or smoked, the skin is utilized for producing glues and for the leather industry. FishBase. Bulgarian Journal of Agricultural Science, 16(3), 398-405., Hamackova J, Szlaminska M, Kouril M, Vachta J, Stibranyiova I, 1997. Eaux Libres, 38:19-21. Aquaculture - a gateway for exotic species. 2000). Fish and Fisheries, 10(3):252-282., Copp GH, Garthwaite R, Gozlan RE, 2005. Artificial spawning and feeding of European catfish, Silurus glanis L., in Turkey. The newborns will remain in the nest till when they have not competely absorbes the yolk sac and will reach the sexual maturity in 2-3 years. Pairing up of males and females commences during migration as they proceed to compete for best spawning grounds in the reach of the river and in heavily vegetated lakes. El siluro (Silurus glanis) es una especie originaria del centro y del este de Europa, que fue introducida en España en 1974 en el embalse zaragozano de Mequinen- za. Mouth is large and broad with very small, pointed teeth. The breed effect on productivity and meat nutrient compsition of fish. The anal fin, very long, renders the body similar to a waving blade between the 6 stretched barbels © Giuseppe Mazza. The name of the genus comes from the Latin “silurus” that means torpedo indicating the big freshwater fish. Alp A, Kara C, Buyukcapar HM, 2004. Molecular Ecology, 11:1039-1055. Wels catfish (Silurus glanis); adult fish, captured in the Syr Darya, a river in Central Asia. temperature and day length. Development of technological regimes of European catfish (Silurus glanis L.) growing in the ponds of Belarus. Aquaculture of this species is constrained by water temperatures <10ºC during winter months in some regions of Europe including France. Identification of non-native freshwater fishes established in Europe and assessment of their potential threats to the biological diversity. Un enorme pesce siluro è stato pescato nella serata di lunedì 23 giugno a Como, più precisamente nella zona della diga Foranea.A compiere l’impresa è stato un giovane pescatore di origine ucraina, che ha impiegato 40 minuti per riuscire a tirare fuori dall’acqua il grosso esemplare. The species is popular with anglers, and a minority of anglers are in favour of releasing it into to rivers, while others are content that it remains in licensed lakes. Public Domain - Released by Yuriy75/via wikipedia - CC0. Silurus glanis - Wikipedi . The introduction of S. glanis in angling clubs is likely to increase revenue to local communities and generate business. Rahel FJ, Olden JD, 2008. Copp G H, Britton J R, Cucherousset J, García-Berthou E, Kirk R, Peeler E, Stakėnas S, 2009. The predicted increase of water temperatures of 2-3ºC by 2050 as a result of climate change is likely to amplify the risk of establishment and breeding success in the UK and other northern countries (Rahel and Olden, 2008; Britton et al., 2010). The larvae live in the nest until the yolk sac is absorbed., Gozlan RE, Flower CJ, Pinder AC, 2003. Incubation lasts about 50 hours at 24°C. It was introduced for angling and aquaculture in Spain, Italy and France. siluro, con una buona conoscenza del territorio. Growth is an integrating variable of fish physiology and behaviour, and reduced growth can result from a variety of factors: food abundance, fish age, social hierarchy, change in water temperature, habitat and increased energy expenditures (Zaikov et al. Fish stock assessment of Lake Schulen, Flanders: a comparison between 1988 and 1999. Maximum length is 500 cm (male), but common lengths are 300 cm, and weight 306 kg. There is potential for dispersal during hydrological events (Slavik et al., 2007). Media in category "Silurus glanis" The following 96 files are in this category, out of 96 total. In April 2012, accidental flooding from licensed lakes containing wels catfish into flood valleys of the River Colne and Chelmer in East Anglia were being investigated. From phylogenetic analysis it seems likely that wels catfish represent an early diversification of Siluriformes (Vittas et al., 2011). In the UK, the government has developed an environmental risk strategy including risk identification, risk assessment, risk management and risk review and reporting. Preliminary studies of intensive wels catfish (Silurus glanis L.) and sturgeon (Acipenser sp.) Fisheries for non-native species in England: angling or the environment? Wels catfish are distinguishable by an elongated scale-less, slime-covered body, with strong upper body strength and laterally flattened tail. Effect of polizyme additive on the growth of catfish (Silurus glanis) fry in cage breeding. The diet of small juveniles is sometimes almost entirely invertebrates, but can also be composed of benthic or mid-water column organisms such as Chironomidae, and during their first year S. glanis take an increasing proportion of young-of-the-year (YoY) fish. In rosso e blu, i territori originari; in arancione, le zone dove è stato introdotto. According to Linhart et al. 2003Gullu et al. Routes of introduction of S. glanis include recreational angling, aquaculture and also use as a biological control agent for cyprinid fish, with certain pathways being more frequent in some countries; for example, the species is predominantly farmed in aquaculture in Italy, Romania, Poland and the Netherlands, but used mainly to enhance recreational angling in the UK. Silurus glanis (wels catfish); line caught adult. doi: 10.1371/journal.pone.0025732, Britton JR, Cucherousset J, Davies GD, Godard MJ, Copp GH, 2010. Rearing of European catfish (Silurus glanis L.) to marketable size in warm water at the laboratory scale. Deliberate introductions have also been followed by accidental escape and dispersal to other waters, as has been reported by Boeseman (1975) in the Netherlands, where it was introduced from Hungary. Fish and Fisheries. Water quality and accelerated winter growth of European catfish using an enclosed recirculating system. Diel rhythms of feeding activity in the European catfish, Silurus glanis. This one has spotted a perch that most probably will meet a bad death © Sebastiano Guido. Aquaculture Research, 35(1), 97-99. doi: 10.1111/j.1365-2109.2004.00983.x, Penil C, 2004. ©Dieter Florian/via wikipedia - CC BY-SA 3.0 DE. Roczniki Nauk Rolniczych, Seria H, Rybactwo, 102(1):131-167. Aquaculture, 243(1/4), 323-329., Kinzelbach R, 1992. Copp et al. Linolenic acid supplementation in the diet of European catfish (Silurus glanis): effect on growth and fatty acid composition. 9696).A nocturnal predator, foraging near bottom and in water column. Rome, Italy: Food and Agriculture Organization of the United Nations. Il siluro (Silurus glanis Linnaeus, 1758) nelle acque del Lago di Massaciuccoli: un rischio per la biodiversità ... tipico delle aree umide del territorio nazionale (A.A. pond cultivation. Évolution de son aire de répartition et prédiction de son extension ([English title not available]). 2012). It swims slowly, waving the long anal fin that garnishes its body from the abdomen to the tail, but is able to make sudden leaps when disturbed by an annoying diver or if it must seize a prey. Czech Journal of Animal Science, 44(1), 29-37. It and Sander lucioperca are predatory fish that are traditionally reared to control wild forage fish dispersed during seasonal pond flooding that may be interspecific competitors with cyprinids (Bokor et al. Of presumable Danubian origin, this fish has diffused in almost all European rivers and lakes, often introduced by the man, as well as in the Caspian and Lake Aral basins, colonizing also the Anatolia, the southern part of the Baltic countries, and even areas of Great Britain and of Spain. Covid, stop per la caccia e la pesca. Ecology of Freshwater Fish, 16:450-456, Cirkovic, M., Ljubojevic, D., Ðordevic, V., Novakov, N., Petronijevic, R., Matekalo-Sverak, V., Trbovic, D., 2012. The skin can be used in glue and leather manufacture. Introduced in Europe and in many European parts for ludic purposes, to give big satisfactions to the amateur fishermen, it has not taken too long, man accomplice, to expand like a wildfire. Silurus glanis. Again from the Greek word glanis, which is the name of the fish: Species Information; Size: 5000mm or 196.9" … New sightings continue to occur being its range progressively expanding. Generate a print friendly version containing only the sections you need. Its greater production in Bulgaria has been suggested (Hadjinikolova et al., 2010). The routes used to introduce non-native fish species are closely related to the nature and extent of different anthropogenic activities such as aquaculture, research, pest control and also recreational fishing. Reproductive success in male sunbleak, a recent invasive fish species in the UK. 2012). Science (Washington), 290(5491), 516-518. doi: 10.1126/science.290.5491.516, Hickley P, Chare S, 2004. 2013,, Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Some example maps demonstrate the extent of introductions. → To appreciate the biodiversity within the Osteichthyes, the BONY FISH, and find other species, please click here. Larval development and growth of the European wels (Silurus glanis) under experimental conditions fed natural and pelleted diets. (2009) present a table of at least 55 fish species found in the natural diet of S. glanis. Is European catfish (Siluris glanis) really becoming abundant in the River Thames? 2008; Muscalu et al. S. glanis is a robust species regarding transference outside its native range, and exhibits tolerance to low oxygen levels in water. Life span is normally 15-30 years, with a maximum recorded age of 80 years (Kottelat and Freyhof, 2007). Ulikowski, D., Szczepkowski, M., Szczepkowska, B., 2003. 2002; Ulikowski et al. Wels catfish are carriers of viral pathogens, namely spring viraemia of carp (SVC) and European sheatfish virus (ESV), which may adversely impact native fish including salmonids and amphibians. 2010), and spawning behaviour was also temperature sensitive -- spawning was delayed for months until water temperatures were within the 18-23ºC range (Wiśniewolski, 1989; Copp et al. © Copyright 2020 CAB International. S. glanis has a broad omnivorous diet, including invertebrates and vertebrates such as small rodents. > 0°C, dry summers, Cw - Warm temperate climate with dry winter, Warm temperate climate with dry winter (Warm average temp. (2005) gave S. glanis an intermediate mean risk score (21.5 out of 54 possible points). Biological Conservation, 72:311-319, Cucherousset, J., Boulêtreau, S., Azémar, F., Compin, A., Guillaume, M., Santoul, F., 2012. 129. > 0°C, wet all year, Cs - Warm temperate climate with dry summer, Warm average temp. Territorio. Fontenay-sous-Bois, France: Conseil Supérieur de la Pêche, 92 pp, Varadi, L., Szucs, I., Pekar, F., Blokhin, S., Csavas, I., 2001. Depending on the habitat the colouration may vary adding more or less accentuated shades, tending green and yellow. Risk of establishment increases in warmer climates such as the Mediterranean as rapid growth and breeding are enhanced by warmer temperatures of 25-28ºC in contrast to likelihood of more sporadic establishment in Northern climates. 10 (3), 252-282. DOI:10.1111/j.1467-2979.2008.00321.x, Froese R, Pauly D, 2012. Body is elongated and lacks scales. With the first darkness it rouses from this apathy and begins its meticolous researches. Also the caudal fin is little developped. On the sheat fish of the Netherlands, Silurus glanis Linnaeus. The addition of wels catfish in recreational catch and release fisheries is likely to have a beneficial revenue effect. 2009). Of possible Danubian origin, the catfish has diffused, thanks to the man, in almost all European rivers and lakes with serious damage to the local species. Egg size is 3 mm and larvae length at hatching is 8.5 mm. Assessing the effects of climate change on aquatic invasive species. Age at maturity is 3-4 yrs. Elvira B, 2001. doi: 10.1371/journal.pone.0050840, Czarnecki, M., Andrzejewski, W., Mastynski, J., 2012. In Italy it has been introduced since about fifty years and now has colonized almost all the waters of the Po River basin and the rivers Arno and Tiber. - Contenimento della presenza di Silurus glanis nelle acque dell’Adda ricomprese nel territorio del Parco Adda Nord e, nel comtempo, contenimento di altre specie ittiche alloctone dannose per l’equilibrio delle specie autoctone (come il gardon, il rodeo amaro, il carassio). However, consideration must be given to the economic costs that are likely to arise from management control policies with the removal of S. glanis from unlicensed waters; monitoring, removal costs and challenges in recapturing demersal species. Hamácková, J., Kouril, J., Adámek, Z., Vachta, R., Stibranyiová, I., 1993. Aquacultura Hungarica, 4: 135-144. Wels catfish exhibit parental care of young, and the males guard clusters of eggs adhered to woody tree roots and submerged macrophytes in riparian reaches and floodplains (Copp et al., 2009). CABI is a registered EU trademark. Is European catfish a threat to eels in southern France? Simoens et al. Presence of Silurus glanis Linnaeus, 1758, in the Volturno Basin. Wels catfish are also hosts of specialist parasites such as Trichodina siluri, Myxobolus miyarii, Leptorhynchoides plagicephalus and Pseudotracheliastes stellifer which may be detrimental to native fish survival (Copp et al. Head is broad and flat. Froese R, Pauly D, 2012. 10 ft.). The revealed that levels of genetic diversity were much higher than previous allozyme and restriction fragment length polymorphism mitochondrial DNA analyses had shown.