Reproductive Biology and Adaptability of the Invasive Alien Freshwater Amphipod<i>Crangonyx floridanus</i>(Crustacea: Amphipoda, Crangonyctidae)

Tojo, Koji; Tanaka, Yoshiki; Kuranishi, Ryoichi B.; Kanada, Shoji

doi:10.2108/zsj.27.522

Cited by 5 publications

(6 citation statements)

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“…While we compared the air temperatures of source and target areas, these do not completely refl ect water temperatures ). In addition, the temperature suitability of particular species might not be completely explained by the minimum and maximum air temperatures of the region of origin (Tojo et al 2010). In any case, several prediction models, including FISK, are based on the same climate data (Bomford 2008, Henderson et al 2011.…”

Section: Discussionmentioning

confidence: 99%

European hub for invaders: Risk assessment of freshwater aquarium fishes exported from the Czech Republic

Kalous¹

2015

Acta Ichthyol. Piscat.

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Kalous L., Patoka J., Kopecký O. 2015. European hub for invaders: Risk assessment of freshwater aquarium fi shes exported from the Czech Republic. Acta Ichthyol. Piscat. 45 (3) 239-245.Background. The aquarium fi sh trade is characterized by an enormous number of species. Aquarium fi sh may have an impact on native biota by means of their invasiveness as well as through pathogen transfer. The Czech Republic has become a gateway for aquatic pets into the European Union. The aims of this study were to identify the most common aquarium fi sh species on the wholesale market, to estimate temperature suitability for seasonal (winter and summer) survival in the EU, and also to assess the invasiveness risk of the most common aquarium fi shes with the strongest temperature matching. Materials and methods. Data on aquarium fi sh species, their origin, and availability from producers and traders based in the Czech Republic were collected based on all available sources. The target area was defi ned as all member states of the EU. Estimation of the temperature suitability for each species was done using Climatch 1.0 software. The Freshwater Fish Invasiveness Screening Kit (FISK) was employed for species with temperature suitability within the target area exceeding 10% in the coldest quarter of the year. Results. In total, 1118 fi sh species representing 51 families were identifi ed. Thirty-three species belonging to 13 families were classifi ed as "very common". Three sources of origin were identifi ed: domestic production within the EU, farm production outside the EU, and wild harvests in the region of origin. The major suppliers outside the EU are in south-east Asia. Only one common species originated from wild harvests. FISK scoring divided the 11 species evaluated as having the strongest temperature suitability in the EU (TSEU) into seven species bearing medium risk and four species representing high risk. The family Cyprinidae was the most frequently represented among all evaluated taxa (seven species), but the majority of high-risk fi shes belonged to the family Poeciliidae (three species). The highest score was earned by Carassius auratus (Linnaeus, 1758). Conclusion. The risk potential of aquarium fi shes most traded in the EU seems to be not alarming. Attention should be focused on the possibility of novel pathogen transfer to native aquatic biota as an important aspect of regulating the aquarium fi sh trade.

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Section: Discussionmentioning

confidence: 99%

European hub for invaders: Risk assessment of freshwater aquarium fishes exported from the Czech Republic

Kalous¹

2015

Acta Ichthyol. Piscat.

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“…Based on our ecological studies of C. floridanus Tojo et al 2007Tojo et al , 2010, this species seems to have a physiological tolerance to a wider range of water temperatures and water flow rates as well as a higher reproductive rate than native Japanese species. As this amphipod has rapidly expanded its distribution into new habitats as yet uninhabited by native amphipod species, it is also expected to significantly affect native species existing in a similar niche.…”

Section: Introductionmentioning

confidence: 99%

Rapid expansion of the distributional range and the population genetic structure of the freshwater amphipod Crangonyx floridanus in Japan

et al. 2010

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ABSTRACT:The freshwater amphipod Crangonyx floridanus (Amphipoda: Crangonyctidae) has considered to be recently introduced from North America to Japan, and now the recorded sites of collection cover nearly all over Japan excluding the northern part. In this study, we surveyed further areas outside the known distribution ranges and also examined the population genetic structure and the phylogenetic relationships between Japanese and North American populations based on nuclear (18S rRNA) and mitochondrial (COI) DNA sequences. We found that this amphipod already reached to Hokkaido, the northernmost Japan, and suggested the rapid expansion in a pattern of concentric circles from the central part of Japan. The genetic analysis showed the genetic homogeneity of Japanese population in contrast to the genetic diversification in North American Crangonyx populations. The process of introduction, establishment, and expansion of this amphipod in Japan may be explained as follows. A limited number of individuals from a North American native population were probably inadvertently introduced and established somewhere within the Kanto region. After that the local population size increased and the range of its distribution was rapidly expanded over Japan.

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“…Non-native amphipods species frequently show high growth rates and may reach carrying capacities substantially above those of local populations (Kotta et al, 2013). This rapid proliferation of invaders leads not only to rapid dispersal but is also frequently linked to dramatic effects on natural communities (Grabowski, Konopacka, Jazdzewski, & Janowska, 2006;Tojo, Tanaka, Kuranishi, & Kanada, 2010;van der Velde et al, 2009). Local populations of gammarid species may be drastically reduced or even replaced completely by the invading species (Grabowski et al, 2006;van der Velde et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…A closely related species Crangonyx floridanus (Bousfield 1963) is also originally from the same region of North East America. Similar to C. pseudogracilis, C. floridanus has a high invasion potential and since 1989 has colonised large regions of the main island of Japan (Nagakubo et al, 2011;Tojo et al, 2010). Its rapid dispersal and high population growth (Nagakubo et al, 2011;Tojo et al, 2010) have highlighted the urgent requirement to contain the spread of C. floridanus and protect local species (Nagakubo et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Similar to C. pseudogracilis, C. floridanus has a high invasion potential and since 1989 has colonised large regions of the main island of Japan (Nagakubo et al, 2011;Tojo et al, 2010). Its rapid dispersal and high population growth (Nagakubo et al, 2011;Tojo et al, 2010) have highlighted the urgent requirement to contain the spread of C. floridanus and protect local species (Nagakubo et al, 2011). Both species are almost identical with field and microscope-based differentiation between the two often resulting in misidentification (Nagakubo et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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First detection of a highly invasive freshwater amphipod (Crangonyx floridanus) in the United Kingdom

Mauvisseau

Davy‐Bowker

Bryson

et al. 2018

Preprint

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The freshwater gammarid, Crangonyx floridanus, originates from North America but has invaded and subsequently spread rapidly throughout Japan. We provide here the first genetic and microscopic evidence that C. floridanus has now also reached the United Kingdom. We found this species in two locations separated by more than 200 km (Lake Windermere in the North of the UK and Smestow Brook, West Midlands). The current distribution of C. floridanus is currently unknown, however both sites are well connected to other river and channel systems therefore the chance of further spread is high. Genetic analyses of C. floridanus indicate that British inland waters are colonised by the same linage, which also has invaded Japan. We recommend further work to assess the distribution of this species and its impact on the local fauna and flora. KeywordsCrangonyx floridanus, first record, United Kingdom N; Longitude: -2.93880 W) and on 26 th September 2018 in the Smestow Brook, West Midlands (Latitude: 52.5727 N; Longitude: -2.2196 W). We present both microscopic and genetic evidence for the presence of C. floridanus in these habitats. Materials and methodsLake Windermere is the largest natural lake in England, with a maximal length of 18.08 km, a maximal width of 1.49 km, a maximal depth of 66 m and a surface area of 14.73 km 2 . Lake Windermere is protected as part of the Lake District National Park and the site is actively used for recreation and tourism. Moreover, a station of the British Freshwater Biological Association (FBA) is located close to Lake Windermere and provides facilities for research on the ecology and conservation of local species on the western shore of the lake.On the 11 th September 2017 and later, on the 28 th July 2018, kick sampling was undertaken as part of a routine monitoring approach. Crangonyx specimens were separated from the samples, preserved in absolute ethanol and transported to the University of Derby for genetic and microscopic analyses. In total, one individual was collected in 2017 and 11 more in 2018. On 26 th September 2018, two more Crangonyx specimens were found during kick sampling the submerged root structures of riparian vegetation in Smestow Brook, a small river more than 200 km away from Lake Windermere. Samples were again preserved in 100% ethanol. Light and Scanning Electron -Microscopy (SEM)Crangonyx specimens (n = 11) were placed on the glass of a Nikon Multiphot diascopic mount and lit by darkfield illumination using a tungsten halogen fibre optic light source. Pictures were taken with a Nikon D7000 mounted on the photomacrography stand, set to colour balance of 3200°K, with a 65mm macro lens (https://www.microscopyu.com/museum/multiphot-large-format-photomacrography-microscope).Samples for SEM were dehydrated in ethanol, placed on aluminium stubs and coated in gold using a splutter coater (Emitech K550X). Samples were then placed in a Vega 3 SEM (TESCAN)

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Reproductive Biology and Adaptability of the Invasive Alien Freshwater AmphipodCrangonyx floridanus(Crustacea: Amphipoda, Crangonyctidae)

Cited by 5 publications

References 8 publications

European hub for invaders: Risk assessment of freshwater aquarium fishes exported from the Czech Republic

European hub for invaders: Risk assessment of freshwater aquarium fishes exported from the Czech Republic

Rapid expansion of the distributional range and the population genetic structure of the freshwater amphipod Crangonyx floridanus in Japan

First detection of a highly invasive freshwater amphipod (Crangonyx floridanus) in the United Kingdom

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