Evaluation of production efficiency of selected feed mixes of intensive culture of European wels (Silurus glanis L.). Cornol, Switzerland: Publications Kottelat, 646 pp, Krieg F, Estoup A, Triantafyllidis A, Guyomard R, 1999. 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). In 2015, an Italian fisherman named Dino Ferrari was featured in international news for capturing a monster Wels catfish in the Po Delta. (Zuchtmöglichkeiten des Welses in Teichen in Polen.) The world’s largest redtail catfish was captured in 2010 by Gilberto Fernandes in Brazil’s Amazon River. Larvae and juveniles are benthic feeders of invertebrate zooplankton such as Rotatoria, Copepoda and Cladocera. Aquatic Invasions, 2:113-116, Copp GH, Vilizzi L, Gozlan RE, 2010. S. glanis is robust enough during transport (even in minimal water and over considerable distances) to be translocated to areas outside its native geographical range (Copp et al., 2009). The anatomy and location of fins and body shape of S. glanis indicate that this fish is a demersal species, with a powerful pair of pectoral fins that is positioned behind the gills at the base of the ventral fins, small pelvic fins situated by the anal vent and an elongated anal fin that is over 50% of its body length. Ferrari's Wels catfish weighed 280 pounds (127 kilograms) and was 8.75 feet (2.67 meters) long. It took over an hour for the Thai fishermen to reel in the heavy catfish. Flathead Catfish. Aquatic Living Resources, 15:139-144, Marcel J, 1980. Ann Rees, Environment Agency, Rivers House, Shaftsbury Rd, Sunrise Business Est, Blandford, Dorset DT118ST, UK. A “do nothing” approach is advocated in low risk situations, whereas removal or containment are considered options in higher risk situations. (2002), S. glanis has been farmed historically in Austria, Bulgaria, Croatia, Germany, France, Hungary, Greece, Macedonia, Poland, the Czech Republic and Romania. World’s Largest Catfish. Investigation on growth rate and food conversion ratio of wels (Silurus glanis L.) in controlled conditions. Maximum reported age is 80 yrs (Kottelat and Freyhof, 2007), although life span is commonly 15-30 yrs. Currently, wels catfish are predominantly found in the South East and Midlands areas of the UK. Eaux Libres, 38:19-21. Rahel FJ, Olden JD, 2008. Fish stock assessment of Lake Schulen, Flanders: a comparison between 1988 and 1999. They can be identified by 6 barbels, 2 long ones on each side of the mouth and 4 shorter ones from the lower jaw. While Paulie’s record was verified by the the Kansas Department of Wildlife and Parks and has been standing for over 20 years, many people have questioned the legitimacy of Paulie’s catch. > 10°C, Cold average temp. The flattened snout with spaced apart nostrils and long barbels on either side of the upper jaw, and 4 shorter barbels on the lower jaw, indicate that S. glanis sense their prey by highly sensitive chemical and olfactory sensors on their barbels and nostrils rather than by vision, as their eyes are small; this can be related to their benthic habitat ecology (Copp et al., 2009). Naturwissenschaften, 96(5), 631-635. http://www.springerlink.com/content/96hh785038172pq0/?p=2d643a9f547444d5abaaed7c8e53b62d&pi=9 doi: 10.1007/s00114-009-0511-3, Triantafyllidis A, Krieg F, Cottin C, Abatzopoulos TJ, Triantaphyllidis C, Guyomard R, 2002. Mareš, J., Jirásek, J., Ondra, R., 1996. PLoS ONE, 7(12), e50840. The risks to native species are through disease and parasite transmission, competition for benthic habitats and predation. All of the catfish on this list are over 100 pounds (45.36 kilograms). 2010), predation and trophic impact (Czarnecki et al. 2002; Ulikowski et al. 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. Aquaculture in the Third Millennium. Spawning is nocturnal. 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. Paulie’s flathead catfish weighed 123 pounds (55.79 kilograms) and was over 5 feet (1.55 meters) in length. The Import of Live Fish Act 1980 (ILFA) is a legislative framework to control importation of non-native fishes, and the Fish Invasive Screening Kit (FISK) is a scoring system to assess the range of risk of non-native fish introduction ranging from potential pest to harmless, based on the evaluation of life history traits of non-native fish species, e.g. 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). ©Dieter Florian/via wikipedia - CC BY-SA 3.0 DE. The aim of control management plans in fisheries in reference to non-natives is to develop a framework to assess the risk in relation to priority and action. Another reason for introductions is as a biocontrol agent for controlling cyprinid fish. Zhivotnov'dni Nauki, 37(5/6), 14-18. 2008). Risk identification and assessment of non-native freshwater fishes: concepts and perspectives on protocols for the UK. Upstream spring migration in April for spawning requires temperatures of 8-10ºC and initiation of spawning occurs at 18-22ºC. Rome, Italy: Food and Agriculture Organization of the United Nations. 2009). In: Status Review Report of 5 Species of Foreign Sturgeon : National Marine Fisheries Service.78 pp. Strasbourg, France: Convention on the Conservation of European Wildlife and Natural Habitats, 35 pp. The Goonch was caught in the River Ramganga in India. It was first introduced to England in 1880, into enclosed recreational lakes of a private Bedfordshire manor estate at Woburn Abbey, for fishing. Detailed coverage of invasive species threatening livelihoods and the environment worldwide. Isolation of microsatellite loci in European catfish, Silurus glanis. Biological Conservation, 72:311-319, Cucherousset, J., Boulêtreau, S., Azémar, F., Compin, A., Guillaume, M., Santoul, F., 2012. A review of the environmental biology of European catfish Silurus glanis in its native and introduced ranges. S. glanis is the largest-bodied European freshwater fish. Habitat use follows a daily pattern, and incorporates territorial behaviour. According to Linhart et al. The record blue catfish was caught in 2011 in Kerr Lake, Virginia by a man named Richard Nicholas Anderson. Is European catfish a threat to eels in southern France? Preferred habitats are slow flowing lowland rivers, backwaters, shallow channels in floodplains and weed covered lakes. 2013, http://www.fao.org/figis/servlet/static?dom=collection&xml=dias.xml, Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Wels catfish can be distinguished from other European catfish by the 6 long barbels under the lower jaw, the scaleless mucous-coated elongated body and the very small dorsal fin (Britton et al., 2010). Information on specific control measures for S. glanis is limited. 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