Long-anticipated new records of an ectosymbiotic branchiobdellidan and an ostracod on the North American red swamp crayfish, &lt;i&gt;Procambarus clarkii&lt;/i&gt; (Girard, 1852) from an urban stream in Tokyo, Japan

Ohtaka, Akifumi; Gelder, Stuart R.; Smith, Robin J.

doi:10.3800/pbr.12.123

Cited by 10 publications

(4 citation statements)

References 29 publications

(45 reference statements)

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“…There are now seven non-marine ostracod species suspected to be alien or invasive in Japan: Ankylocythere sinuosa (Rioja, 1942), Uncinocythere occidentalis (Kozloff and Whitman, 1954), Pseudostrandesia tenebrarum Smith and Ozawa, 2021, Candonocypris novaezelandiae (Baird, 1843), Hemicypris barbadensis Broodbakker, 1983, Hemicypris posterotruncata Bate, 1970and S. denticulata n. sp. (Smith and Kamiya 2001Scharf et al 2014;Ohtaka et al 2017;Smith and Chang 2020;Smith et al 2021). The last four of these are associated with rice fields, and while origins are speculative, likely candidates are the Australasian region, the Caribbean, and Africa (last two) respectively (Scharf et al 2014;Smith and Chang 2020;this study).…”

Section: Discussionmentioning

confidence: 99%

A New Species of the Genus Sarscypridopsis (Crustacea: Ostracoda) Discovered in a Japanese Rice Field

et al. 2023

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Sampling of rice fields in Kanagawa Prefecture, Japan, yielded an undescribed species of the non-marine ostracod genus Sarscypridopsis McKenzie, 1977. Small marginal denticles on the left valve give this species its name: Sarscypridopsis denticulata n. sp. Most species of the genus Sarscypridopsis are restricted to Africa, and based on morphological characters, the closest congener of this new species is native to Botswana. We therefore conclude that this species is probably not native to Japan, and it joins six other non-marine ostracod species that are probably or possibly alien or invasive in Japan. Including the new species, four of these are associated with rice fields. All specimens of Sarscypridopsis denticulata n. sp. are female, and one of the antennal claws (claw G2) is more robust and with better developed serration compared with the other antennal claws. This is a feature of several Cypridopsinae lineages, but in females only. An overview of the zoogeographical distribution of the genus is provided.

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Section: Discussionmentioning

confidence: 99%

A New Species of the Genus Sarscypridopsis (Crustacea: Ostracoda) Discovered in a Japanese Rice Field

et al. 2023

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“…Subsequent collections in the same southwest area have shown this is not an isolated occurrence (J.-F. Parpet, unpub obs.). Although this crayfish has an almost worldwide distribution (Kouba et al 2015), endemic branchiobdellidans on translocated stocks are surprisingly rare with the only other European record being in northern Italy (Gelder et al 1994), and a recent one in Japan (Ohtaka et al 2017). A subsequent study of the northern Italian population of P. clarkii (Gelder at al.…”

Section: Discussionmentioning

confidence: 99%

North American Branchiobdellida (Annelida: Clitellata) or Crayfish Worms in France: the most diverse distribution of these exotic ectosymbionts in Europe

Parpet

Gelder

2020

Zoosymposia

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Crayfishes and other invertebrates were collected during 2010 to 2016 from 519 sites located in the river basins of the Adour, Charente, Dordogne, Garonne, Loire, Seine, Rhône and Sélune in France. North American species included Pacifastacus leniusculus at 255 sites, Faxonius limosus at 206 sites, Procambarus clarkii at 56 sites, and the endemic Austropotamobius pallipes at two sites. However, branchiobdellidans were only recorded from 100 sites with 23 of these being sampled more than once, resulting in a total of 127 collections. The widely distributed western North American, P. leniusculus carried four of its endemic branchiobdellidan species: Cambarincola gracilis, C. okadai, Triannulata magna and Xironogiton victoriensis. X. victoriensis was found at the majority of sites, with C. okadai, C. gracilis, and T. magna at fewer locations. Although F. limosus was the second most numerous crayfish species collected, it did not carry any of its endemic North American branchiobdellidan species. However, it was found cohabiting with P. leniusculus at four sites but carried X. victoriensis at only one of these. European A. pallipes only occurred at two sites with individuals harboring X. victoriensis, although no cohabiting exotic crayfish were found. Crayfish were also absent from three sites where free-living X. victoriensis were recovered from substrate samples. Procambarus clarkii appeared at sites scattered across the country, while specimens with C. mesochoreus were restricted to the Adour drainage. This study has shown the widespread distribution of exotic branchiobdellidans in the wild and the virtual extinction of endemic species in France. In addition, we have provided the first European record of T. magna, and the first record of C. mesochoreus in France; the latter being only the second recording in Europe. With this comprehensive survey of their crayfish hosts in France, monitoring future exotic range expansions and endemic contraction or extinction can be traced. These data will be available to authorities for future planning in maintaining healthy freshwater bodies by reducing the damaging effects caused by exotic crayfishes.

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“…Given the extensive legal and illegal translocations of P. clarkii around East Asia, it is interesting that neither C. mesochoreus nor any of its other endemic branchiobdellidans have been reported. However, the origin of C. mesochoreus on P. clarkii collected at two sites in suburban Tokyo (Ohtaka et al 2017) is strongly suspected to be the result of escaped or released domestic pets that were recently imported into the country. It should be anticipated that other American ornate crayfish pet species will be discovered in East Asia, possibly carrying exotic branchiobdellidans.…”

Section: Distribution Of Exotic Branchiobdellidans and Crayfish In Eamentioning

confidence: 99%

An ongoing saga: Endemic branchiobdellidans (Annelida: Clitellata) on translocated commercial North American crayfish

Gelder

2020

Zoosymposia

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Over the last 130 years demand for crayfish has exceeded regional supplies around the world, so stocks, primarily from North America, have been imported to satisfy this need. These demands are human based and include gastronomy, sport fishing bait, food for rearing animals, educational aides, ornamentation in waterbodies, and more recently a significant increase in pet crayfish sales. The three most common commercial species from North America are Pacifastacus leniusculus, Procambarus clarkii and Orconectes limosus, although four other species are increasing in importance as they become more widely distributed. All of these crayfish in their endemic range have been reported to carry branchiobdellidan annelids. Therefore, when the crayfish are translocated, their ectosymbionts likely accompany them. Eighty-six potentially transportable branchiobdellidans are recognized in this paper, along with the distribution of six species known to have been translocated. Moreover, branchiobdellidans endemic to the translocation regions have adopted introduced crustacean hosts, which demonstrates that branchiobdellidan host species specificity is not as restrictive as many researchers believe. On the evidence to date, these translocated branchiobdellidans appear to have the same relationship and cause the same amount of damage, if any, as those on their endemic crayfish hosts. The geographical distribution of endemic branchiobdellidan—crayfish species associations are unique to each of four disjunct regions as defined by Bănărescu: Euro-Mediterranean, East Asian, western North American and eastern North American; the latter includes eastward drainages from Canada to Costa Rica.

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Long-anticipated new records of an ectosymbiotic branchiobdellidan and an ostracod on the North American red swamp crayfish, <i>Procambarus clarkii</i> (Girard, 1852) from an urban stream in Tokyo, Japan

Cited by 10 publications

References 29 publications

A New Species of the Genus <i>Sarscypridopsis</i> (Crustacea: Ostracoda) Discovered in a Japanese Rice Field

A New Species of the Genus <i>Sarscypridopsis</i> (Crustacea: Ostracoda) Discovered in a Japanese Rice Field

<p class="HeadingRunIn"><strong>North American Branchiobdellida (Annelida: Clitellata) or Crayfish Worms in France: the most diverse distribution of these exotic ectosymbionts in Europe</strong></p>

<p class="HeadingRunIn"><strong>An ongoing saga: Endemic branchiobdellidans (Annelida: Clitellata) on translocated commercial North American crayfish</strong></p>

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