Exotic Fish

Buyuk Menderes River basin, located in the Southern part of Turkey, has two significant dam lakes. Threats include pollution (industrial and agricultural activities), overfishing, habitat degradation and drought. This study was carried out to determine the native and non-native fish fauna in Kemer and Topcam dams lakes in the Buyuk Menderes River. Specimens were caught by scoop and gill nets between April 2007 and February 2008. Kemer is inhabited by Cyprinus carpio, Squalius cephalus, Barbus plebejus escherichi, Silurus glanis Acanthobrama mirabilis and Chondrostoma maendrense. In Topcam Dam has Cyprinus carpio, Squalius cephalus, Acanthobrama mirabilis and Capoeta bergamae. Both had the invasive Lepomis gibbosus, Pseudorasbora parva and Carassius gibelio. Acanthobrama mirabilis is endangered fishes and Chondrostoma maendrense and Capoeta bergamae are two of the vulnerable species.

is a shallow lake facing eutrophication, like many other freshwater reservoirs. A reduction in biodiversity has been observed and cyanobacterial blooms are frequent, occasionally leading to large fish kills. An annual sampling cycle was carried out in the present study, with the aim of understanding the present seasonal variation of Lake Vela's physico-chemistry and cladoceran assemblage. The present results were compared with those obtained in previous studies. Presently, Lake Vela is facing higher nutrient and Chl a levels than in past years. The cladoceran assemblage is now dominated by small-bodied forms, such as Chydoridae and Bosmina longirostris, except in the spring peak of Daphnia longispina. Still, the seasonal pattern of the cladoceran community is more or less coherent with the general model observed in other temperate lakes. The results also suggest that this was a rather unusual year, with a Daphnia summer peak, probably because of a large fish kill that occurred in late spring.

Background. The East Kolkata Wetlands in India (a Ramsar site) are sewage-fed, nutrient-rich water bodies successfully used for fish production. The vermiculated sailfin catfish, Pterygoplichthys disjunctivus (Weber, 1991), exotic to India, has invaded these wetlands. The management and control of this catfish has been hindered, because of the lack of information on its abundance, population structure, biological traits, level of establishment, and competition with native fish species. Materials and methods. Within 2013-2015 studies were carried out on the population structure of P. disjunctivus, its food habits, reproductive biology, and initial impacts in the wetlands through monthly and seasonal collection of samples, examination of food items, reproductive parameters, catch data, and gathering fishers experience. Results. The length (TL) and weight of the specimens ranged from 10 to 55 cm and from 120 to 1250 g, respectively. Major food items of the catfish were detrital matter (%IRI 56), unidentified plant matter (%IRI 11), fish eggs (%IRI 11), polychaete worms (%IRI 5), and other minor items (%IRI 0.3 to 4). At 50% similarity, the food items of P. disjunctivus overlapped with that of Macrognathus pancalus, Channa punctata, Nandus nandus, Anabas testudineus, Clarias batrachus, Oreochromis niloticus, Cirrhinus mrigala, and Cyprinus carpio while at 80% it overlapped with that of C. mrigala and C. carpio. The fecundity of P. disjunctivus, in the wetlands, was the highest recorded for the species. Females attained the first maturity at 24 cm TL and reproduced multiple times within July-November. The breeding period of the species overlapped with 13 native fish species, of which it seriously overlapped with that of Gudusia chapra, Amblypharyngodon mola, Pethia conchonius, P. ticto, N. nandus, C. punctata, and A. testudineus. The sailfin catfish has established reproducing populations in the wetlands and reached 'invasive' proportions constituting 4.83% (300.04 t • year-1) of the mean annual fish catch (6203.85 t • year-1) from the wetlands. The invasive risk assessment showed a high risk of the species in the current scenario and probable climate change scenarios in future in the region. Conclusions. Pterygoplichthys disjunctivus has successfully colonized the sensitive East Kolkata Wetlands, which might easily spread to neighbouring water bodies including the sensitive Ganga River and Sundarban mangroves and cause ecological and economic disturbance unless preventive measures are taken as the species has high invasive risk in the region.

Gambusia affinis is a native poecilid of North America. It was introduced in Argentina in 1945, since then G. affinis has established as stable populations in several provinces like Cordoba and Buenos Aires up to 35o S approximately. On this work, three different kinds of experiences have been made to obtain some ecophysiological features of this exotic fish. The results were compared with those of Cnesterodon decemmaculatus, a native poecilid widely used in bioassays in Argentina. Some comments were made upon the morphological and pigmentation aspects of both species. The incipient lethal level of pH (96 h) was estimated at 10.3. The average swimming capacity using the Fatigue Time technique with a constant velocity of 6.8 cm.s-1 was 46.6 min and the lethal temperature obtained by means of the Critical Maximum technique was 41.21 oC. All the analyzed parameters were larger than those noted for C. decemmaculatus. Both species showed a significant loss in their pigmentation when they...

Introduction of fish species is a globally widespread practice that causes losses of native species and homogenization of diversity within and across continents. Diet assessments are important tools to depict the ecological function of species introduced into novel ecosystem and possible direct and indirect ecological effects. In this study, we compare the diet of Piaractus brachypomus, a mainly frugivorous Neotropical fish, introduced into the Sepik-Ramu River Basin (Papua New Guinea) nearly two decades ago, to that of similar size individuals from Neotropical populations in the Amazon and Orinoco River basins (South America). In contrast to native populations that feed mainly on terrestrial plants and invertebrates, the diet of introduced P. brachypomus is mainly composed of fish remains and aquatic plants, while terrestrial plants are frequently consumed but in relatively smaller amounts. These findings show that P. brachypomus has an inherently plastic diet that can be adjusted ...

Indiscriminate and illegal farming of the African Catfish Clarias gariepinus, in central Kerala has now resulted in the escape and spread of the species into Vembanad Lake, a large brackish water wetland and inland fish diversity hotspot. We collected 17 individuals of C. gariepinus ranging in size from 200 to 750 mm from different locations in the southern sector of the lake during a field survey conducted in 2007. Samples comprised of mature specimens of both sexes indicating their reproductive potential in the study area. The possible impacts of spread of C. gariepinus into natural water bodies of Kerala, especially the Vembanad Lake, and options for their management are discussed.

The loss of biodiversity is one of the most reflective effects of humans on the global perspective and it is more and more urgent to understand how this loss will affect and what will be the profound consequences to the ecosystem functioning. Non-native fishes can cause considerable adverse impacts on the function of aquatic ecosystems and loss of biodiversity. Ecology of ecosystem focuses on the fluctuation of energy and nutrients through ecological systems. It has been confirmed that the fishes are sensitive indicators of environmental degradation and alteration. Study was undertaken during the period of October 2015 to September 2016 from the Paisuni river, India. Fish faunas of the Paisuni river have harbors of 58 species belonging to 5 order, 18 family and 43 genera. Cypriniformes and Cyprinidae were the most rich fish species order and families, respectively from the river. The Cyprinidae family has highest harbors family with 25 fish species. The family Anabaniitidae has 5 fish species which is second dominant family from the Paisuni river. According to abundance, Cyprinus carpio and Oreochromis niloticus were powerfully invaded in the Paisuni river. The detonated frequency of O. niloticus and C. carpio was recorded from the Paisuni river. Exotic species is alarming for indigenous fish species biodiversity. C. carpio and O. niloticus are frequently recorded in the Ganga river. Very highly important and ecological indicator fish species, Tor mahseer, Tor tor is declining in the catch. Current ecosystem functioning is favour to non-native species from the Paisuni river.

Morphological developments, including fins, body proportions and pigmentation in Poecilia reticulata larvae, were described under rearing conditions. Body length of larvae were 4.5 to 5 mm just after birth (day-0), reaching 11.9 to 13.5 mm on day-30 after birth. The anal fin modified on day-23 in males and females. The caudal fin coloured on day-28 after birth in males. Male and female distinguished by gonopodium, body colour pattern and size on day-40. The majority of both sexes were sexually mature and fins are fully developed on day-50 after birth.

Pen culture for in situ raising of stocking material was conducted in Sareni Jheel, located in the Rae Bareli District of Uttar Pradesh. Sareni Jheel, being rich in organic carbon (4.5%) and nutrients, higher values of silt (29%) and clay (15%) were recorded. Rich oxygen levels, alkaline pH, high organic matter, moderate to high chemical parameters suggested moderately productive nature of this wetland. Pen with high-density polyethylene (HDPE) net was installed in an area of 0.1378 ha and stocked with advanced fry of the Indian major carps, rohu Labeo rohita and catla Catla catla in the ratio of 1:1 @ 25 nos. m-2. No significant changes in water quality parameters were noticed within and outside the installed pen. Mean weight at stocking of rohu and catla was 2.88±1.41 g and 2.1±1.16 g, which increased to 57.2±13.84 g and 67.38±25.79 g respectively, in 120 days. The average feed conversion ratio (FCR) recorded was 1.08 with overall survivability of 69.52% in rohu and 74.74% in catl...

Present study was aimed to find out the Lernaea susceptibility, infestation and its treatment in indigenous major and exotic Chinese carps under polyculture system. 450 fishes were reared in the 0.5 acre ponds at Fish Pond Complex, Department of Fisheries and Aquaculture, University of Veterinary and Animal Sciences, Ravi Campus Pattoki and parasitic load was checked for the month of June, July and August. Five specimens of each species were caught on fortnightly basis and examined for the presence of Lernaea cyprinacea species on different body parts. The parasites were removed, preserved in 5% formalin and identified. Intensity of Lernaea was highest in the Catla catla followed by Hypophthalmichthys molitrix and Ctenopharyngodon idella in the month of June. Highest number of Lernaea (100) were counted in Catla catla and lowest in the Labeo rohita and Cirrhinus mrigala after the Cyprinus carpio which did not showed any parasite and behave as most resistant species among the Chinese...

GIS is a technology that can be applied to clarify issues, leading to solutions by treating several spatial components simultaneously. GIS has been used in aquaculture studies for the past 15 years to evaluate the suitability of coastal areas for farming activities. Aquaculture management issues such as the multiple uses of estuarine waters, studies relating to the impact of water quality on finfish and shellfish aquaculture, and habitat availability can be studied using GIS. Generally encountered issues between aquaculture operations and marine waterfowl habitats have also been addressed using GIS. FAO has established a web-based portal, GIS Fish, which can obtain the global experience on Geographic Information Systems (GIS), Remote Sensing and Mapping as applied to Aquaculture and Inland Fisheries. Several studies have been implemented on wetlands by giving importance to its conservation and management aspects, and positive results were obtained.

The European catfish, Silurus glanis is one of the largest freshwater fish worldwide. Although it originally inhabited rivers of Eastern Europe and Western Asia, this species is spreading within Europe, due to its popularity among anglers and interest in it as a potential species for aquaculture. This species has never been recorded in America until now. In August 2006, in the State of Santa Catarina, Southern Brazil, the local newspaper "Diário Catarinense" reported, with a photograph, the capture of a huge catfish by an amateur fisherman in the Itajaí-Açu River, which was identified as S. glanis. In March, 2010, the Laboratory of Ecology, Ichthyology and Fisheries (LEPI) of the Federal University of Paraná received another individual of S. glanis that had died in a small pond next to the Piquiri River, in the State of Paraná. Our aim is to report these two independent and geographically separate records of S. glanis in South America, as well as highlight our concerns about the illegal transport of aquatic organisms, which is a serious threat to the conservation of natural resources, especially in megadiverse regions such as Brazil.

Biodiversity and its conservation are regarded as one of the major issues of enabling sustainable use of natural resources. This contribution focuses on the diversity of fish population and their conservation aspects in the biggest freshwater tectonic Lake Sone (3458.12ha) in Assam, India. The study revealed the occurrence of 69 species of fishes in the lake belonging to 49 genera, 24 families and 11 orders. Of these fishes, 84.2% belonged to the primary freshwater group (Cyprinids 35.39%), while the rest to the peripheral class. Attempts have been made to portray the fish diversity of the lake zoogeographically and emphasise the value of conserving biodiversity. Further, results of linear regression revealed significant correlations between fish yield and soil organic carbon, soil potassium, water pH, total alkalinity and conductivity, and aquatic macrophytic biomass.

ABSTRACT: The present study was carried out to find out the abundance of four exotic fish namely, common carp, grass carp, silver carp and bighead carp in the Urpod beel of Goalpara district of Assam. The Urpod beel has a rich ichthyofaunal diversity and available almost all native fish species of Assam. During last few years the beel become habitat of some exotic fish species and their number has been increasing day by day, causes disturbances to the native fish species. The rate of exotic fish infestation in the beel was determined through field investigation and catch record from January 2011 to December 2011 in the fish landing centres of the beel. Abundance Index was calculated for the four exotic species from each catch data. A marked seasonal variation of the fish catch of native and exotic fishes was noticed. Among the four exotic species common carp recorded highest catch (4.99 % of total catch) and bighead recorded lowest (2.84 % of total catch).

risk assessment modelling can be used to help determine which exotic fish species are most likely to establish pest populations in the murrayDarling Basin. Five factors are correlated with the establishment success of exotic freshwater fish in Australia: (1) climate match; (2) overseas range size; (3) number of continents where the species has established exotic populations; (4) proportion of introduction events that have been successful for the species; (5) proportion of introduction events that have been successful for species in the same genus or family. A fish species’ scores for these five factors can be summed to give an establishment risk score. the number of times and places a species is released is also strongly correlated with establishment success and most fish species will establish exotic populations if they are released often enough. Of the 33 exotic fish species known to be established in the wild in Australia, four have high climate matches to the whole of the murray...

Effective management of invasive fishes depends on the availability of updated information about their distribution and spatial dispersion. Forensic analysis was performed using online and published data on the European catfish, Silurus glanis L., a recent invader in the Tagus catchment (Iberian Peninsula). Eighty records were obtained mainly from anglers' fora and blogs, and more recently from www.youtube.com. Since the first record in 1998, S. glanis expanded its geographic range by %700 km of river network, occurring mainly in reservoirs and in high-order reaches. Human-mediated and natural dispersal events were identified, with the former occurring during the first years of invasion and involving movements of >50 km. Downstream dispersal directionality was predominant. The analysis of online data from anglers was found to provide useful information on the distribution and dispersal patterns of this non-native fish, and is potentially applicable as a preliminary, explorato...

Galicia (NW Spain) is a region with a high number of freshwater endemics, and probably the best preserved area concerning fish populations in the Iberian Peninsula, where records of non-indigenous freshwater species are recent when compared to the rest of the ...

A B S T R A C T Citizen warnings alerting about the presence of invasive species has been claimed as fundamental in the strategies addressed to manage aquatic invasions. A great volume of online information coming from fishermen and ordinary citizens, about detection of new species in their communities is currently available. Unfortunately, it is not always implemented as a useful tool by agencies, and within stakeholders protocols, to prevent and manage biological invasions. In this work, we have used as a case study the wels catfish Silurus glanis Linnaeus, 1758. Online blogs, webpages, videos, magazines, and newspapers, were searched for news about the presence and spread of S. glanis in the Iberian Peninsula until June 2016. This information was compiled with official reports (scientific papers and regional and national governmental reports) to create a map showing the putative current pattern of S. glanis invasion through Iberian freshwater ecosystems. The current situation pointed to Silurus's presence in six of the seven main river basins of the Iberian territory. Since non-official reports need post-alerts confirmations, we have also set up a molecular pilot study designing genus specific primers to detect this species in environmental DNA (eDNA) from the reported locations. In the pilot study, primers were tested on eDNA samples extracted from experimental aquariums and on real environmental samples taken from different basins in Spain (Ebro, Douro and Tagus). In all these basins S. glanis was detected. Official Silurus reports were confirmed with two molecular markers in five out of the six cases (83%) assayed in this work, and in two out of three non-official reports (66%) coming from fishermen websites and newspaper reports. The proposed combined strategy (citizen alerts and the eDNA detection method) can be a helpful tool in early detection of invasive species allowing fast and effective management actions by stakeholders.

Ikan merupakan hewan yang banyak digemari. Tingginya permintaan akan ikan di indonesia, dan kurangnya pasokan akan ikan. Maka Budidaya Ikan adalah prospek yang cukup bagus untuk dilakukan. disamping itu banyak pilihan akan budidaya ikan. kita dapat memilih budidaya ikan apa yang cocok untuk kita budidayakan. Tidak hanya ikan untuk konsumsi saja yang prospek budidayanya bagus tetapi ikan hias tak kalah untuk dibudidayakan, selain permintaan tinggi, harga ikan hias juga cukup tinggi, bahkan harganya dapat mencapai jutaan. Banyak pilihan ikan apa yang akan kita budidayakan.

This is the first record of the common bream, Abramis brama (Linnaeus, 1758), introduced into the Iberian Peninsula. Eight
individuals of this cyprinid fish species were captured (of a total of 978 fish) in the Boadella Reservoir (Catalonia, Spain) on
August 18, 2004. This reservoir is only 14 km away from France, where the bream is native, and contains several exotic freshwater fish that are still not widespread in Spain. The further introduction of species and the illegal translocation of the bream
by anglers to other Iberian river basins should be controlled by the Spanish administration.

The first record of the European catfish (Silurus glanis L. 1758) introduced to the Llobregat river basin (NE Spain) is reported. We captured one individual of this silurid fish species (of a total of 541 fish) in La Baells reservoir on 30 August 2006. Given the low catchability of this fish species, the popularity among some anglers, and old rumours on this introduction, we hypothesize that this species has been present in the reservoir since a few years ago, despite we did not capture it in two previous surveys. The illegal introduction of this and other exotic species to other Iberian river basins should be prevented by the Spanish administration.

The first record of the European catfish (Silurus glanis L. 1758) introduced to the Llobregat river basin (NE Spain) is reported. We captured one individual of this silurid fish species (of a total of 541 fish) in La Baells reservoir on 30 August 2006. Given the low catchability of this fish species, the popularity among some anglers, and old rumours on this introduction, we hypothesize that this species has been present in the reservoir since a few years ago, despite we did not capture it in two previous surveys. The illegal introduction of this and other exotic species to other Iberian river basins should be prevented by the Spanish administration.

The first record of the European catfish (Silurus glanis L. 1758) introduced to the Llobregat river basin (NE Spain) is reported. We captured one individual of this silurid fish species (of a total of 541 fish) in La Baells reservoir on 30 August 2006. Given the low catchability of this fish species, the popularity among some anglers, and old rumours on this introduction, we hypothesize that this species has been present in the reservoir since a few years ago, despite we did not capture it in two previous surveys. The illegal introduction of this and other exotic species to other Iberian river basins should be prevented by the Spanish administration.

This paper extends the knowledge of the geographical distribution of non-native freshwater fishes in the Ebro River basin (Spain). More than two hundred surveys were carried out since 2000, and thirteen non-native fish species were collected on fiftyeight occasions. The spread of most of the recorded non-native species seems to be a consequence of illegal introductions related to sport fishing activities and the subsequent natural dispersal. Their presence could impact natural populations of Iberian native -mostly endemic-freshwater fish species, through direct predation and competition for niche and/or trophic resources.

Despite the iconic status of floodplain wetlands and billabongs across the Murray-Darling River system, remarkably little is known of their fish communities. No records exist of community composition prior to European colonisation. Limited palaeo-limnological studies suggest conditions in floodplain wetlands changed s i g n i f i c a n t l y i n t h e 1 8 8 0 ' s o r t h e r e a b o u t s , h o we v e r t h e f i r st direct records of fish communities date from as late as the 1940/50s. Knowledge of current communities is geographically fragmented with accessible records being largely restricted to the upper and lower Murray wetlands. Most of the existing information is in the form of unpublished reports and theses. Whilst these records suggest that fish communities within wetlands are greatly altered from their natural state with widespread dominance of exotic fish species, wetlands of the Murray-Darling continue to support a variety of native fish species. The presence of several species of high conservation significance, sometimes in high numbers, highlights the importance of these systems for conserving native fish biodiversity. Understanding of the ecological processes driving fish community structure is limited, and is largely based on a number of relatively recent studies conducted in wetlands along the upper Murray and tributaries. The general absence of species that are wholly restricted to off-channel wetland systems suggests wetland and riverine fish communities are continuous across the floodplain. Studies of larval fish feeding, habitat use and dispersal indicate low velocity habitats along river channels may be crucial for the recruitment of a number of fish species, suggesting recruitment of native fish may be generally improved where river-floodplain linkages are maintained. Studies in the upper Murray region indicate that fish communities are structured by a variety of factors including wetland bathymetry, physical and chemical conditions (particularly temperature, oxygen and salinity), microhabitat and food availability, and the presence of exotic fish species. Whilst these variables are likely to be important for the structuring of wetland fish communities across the Murray-Darling Basin, the relative importance of each may vary greatly between and within regions. The limited research to date indicates that management strategies targeting: (i) 3 maintenance of floodplain wetland habitat diversity; (ii) river and floodplain water regimes and linkage; (iii) riparian and littoral management; and (iv) introduced species are critical for achieving effective management of wetland fish communities.

This paper provides the first report of the Pyrenean minnow Phoxinus bigerri in a small coastal river, which flows into the Atlantic coast of Galicia (NW Spain), as well as basic biometric and population data. The high density found in this survey, in addition to the presence of both young-of-the-year and the six brightly coloured males showing clear spawning characteristics, all indicate that this fish species is naturalized in the area.

The European catfish, Silurus glanis is one of the largest freshwater fish worldwide. Although it originally inhabited rivers of Eastern Europe and Western Asia, this species is spreading within Europe, due to its popularity among anglers and interest in it as a potential species for aquaculture. This species has never been recorded in America until now. In August 2006, in the State of Santa Catarina, Southern Brazil, the local newspaper "Diário Catarinense" reported, with a photograph, the capture of a huge catfish by an amateur fisherman in the Itajaí-Açu River, which was identified as S. glanis. In March, 2010, the Laboratory of Ecology, Ichthyology and Fisheries (LEPI) of the Federal University of Paraná received another individual of S. glanis that had died in a small pond next to the Piquiri River, in the State of Paraná. Our aim is to report these two independent and geographically separate records of S. glanis in South America, as well as highlight our concerns about the illegal transport of aquatic organisms, which is a serious threat to the conservation of natural resources, especially in megadiverse regions such as Brazil.

In the Murray-Darling River system, remarkably little is known of their fish communities. No records exist of community composition prior to European colonisation. Limited palaeo-limnological studies suggest conditions in floodplain wetlands changed significantly in the 1880's or thereabouts, however the first direct records of fish communities date from as late as the 1940/50s.

Despite the iconic status of floodplain wetlands and billabongs across the Murray-Darling River system, remarkably little is known of their fish communities. No records exist of community composition prior to European colonisation. Limited palaeo-limnological studies suggest conditions in floodplain wetlands changed s i g n i f i c a n t l y i n t h e 1 8 8 0 ' s o r t h e r e a b o u t s , h o we v e r t h e f i r st direct records of fish communities date from as late as the 1940/50s. Knowledge of current communities is geographically fragmented with accessible records being largely restricted to the upper and lower Murray wetlands. Most of the existing information is in the form of unpublished reports and theses. Whilst these records suggest that fish communities within wetlands are greatly altered from their natural state with widespread dominance of exotic fish species, wetlands of the Murray-Darling continue to support a variety of native fish species. The presence of several species of high conservation significance, sometimes in high numbers, highlights the importance of these systems for conserving native fish biodiversity. Understanding of the ecological processes driving fish community structure is limited, and is largely based on a number of relatively recent studies conducted in wetlands along the upper Murray and tributaries. The general absence of species that are wholly restricted to off-channel wetland systems suggests wetland and riverine fish communities are continuous across the floodplain. Studies of larval fish feeding, habitat use and dispersal indicate low velocity habitats along river channels may be crucial for the recruitment of a number of fish species, suggesting recruitment of native fish may be generally improved where river-floodplain linkages are maintained. Studies in the upper Murray region indicate that fish communities are structured by a variety of factors including wetland bathymetry, physical and chemical conditions (particularly temperature, oxygen and salinity), microhabitat and food availability, and the presence of exotic fish species. Whilst these variables are likely to be important for the structuring of wetland fish communities across the Murray-Darling Basin, the relative importance of each may vary greatly between and within regions. The limited research to date indicates that management strategies targeting: (i) 3 maintenance of floodplain wetland habitat diversity; (ii) river and floodplain water regimes and linkage; (iii) riparian and littoral management; and (iv) introduced species are critical for achieving effective management of wetland fish communities.

The Iberian Peninsula has a rich fauna of freshwater fish, with many endemics that are threatened. One of the threat causes is the introduction of
exotic species or translocation of natives to new basins. In this paper, we review the ecological impacts of these introductions, from the genetic and
individual to the community and global levels, primarily using studies from the Peninsula. Although the accumulated evidence is considerable, the
ecological impact of most species and introductions has barely been studied and is probably much greater than is known.

This paper describes the first record of the European catfish Silurus glanis Linnaeus, 1758, introduced into the Guadalquivir River basin. One individual of the species was captured in the Iznájar Reservoir (Córdoba, Spain) in July 2011. Most likely, the illegal introduction of the species is due to anglers that brought the fish from other Iberian river basins, where the species has been present since 1974.