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A gravid female of Lernaea cyprinacea and a larva of Argulus sp. from Rhinogobius sp. OR in a pond, western Aichi Prefecture, central Honshu, Japan. A-B, fish infected by L. cyprinacea, ventral (A) and lateral (B) views; C-D, whole body and cephalothorax of L. cyprinacea, dorsal view; E, Argulus sp., dorsal view. Alcohol-preserved specimen of L. cyprinacea (C-D); fresh specimen of Argulus sp. (E). Scale bars: A, 5 mm; B-C, 3 mm; D, 1 mm; E, 0.2 mm.
Source publication
The freshwater goby, Rhinogobius sp. TO, is endemic to Japan and occurs only in the Tokai District, central Honshu, Japan. The lernaeid copepod, Lernaea cyprinacea Linnaeus, 1758, and the argulid branchiuran, Argulus sp., were collected from specimens of this goby in Aichi Prefecture. These crustaceans are the first parasites found from Rhinogobius...
Contexts in source publication
Context 1
... two specimens (32.2 and 30.4 mm SL) of Rhinogobius sp. TO were infected each by three and two individuals of Lernaea cyprinacea (Fig. 1A-B). These individuals consisted of three gravid females with egg sacs (Fig. 1C-D), one immature female without egg sacs, and one copepodid. Except the copepodid found on the host's skin near the ventral fin, the females inserted their anterior part of the body into the musculature (n=3) and body cavity (n=1) of the host (Fig. 1A-B). The ...Context 2
... two specimens (32.2 and 30.4 mm SL) of Rhinogobius sp. TO were infected each by three and two individuals of Lernaea cyprinacea (Fig. 1A-B). These individuals consisted of three gravid females with egg sacs (Fig. 1C-D), one immature female without egg sacs, and one copepodid. Except the copepodid found on the host's skin near the ventral fin, the females inserted their anterior part of the body into the musculature (n=3) and body cavity (n=1) of the host (Fig. 1A-B). The inserting sites were the caudal peduncle (n=1), the isthmus (n=1), and near the ...Context 3
... cyprinacea (Fig. 1A-B). These individuals consisted of three gravid females with egg sacs (Fig. 1C-D), one immature female without egg sacs, and one copepodid. Except the copepodid found on the host's skin near the ventral fin, the females inserted their anterior part of the body into the musculature (n=3) and body cavity (n=1) of the host (Fig. 1A-B). The inserting sites were the caudal peduncle (n=1), the isthmus (n=1), and near the base of the ventral (n=1) and anal (n=1) ...Context 4
... gravid (n=3) and immature (n=1) females were 7.0-8.9 (mean 7.7 mm) mm long, excluding the egg sacs, and 4.0 mm long, respectively. One (30.4 mm SL) of the two specimens of Rhinogobius sp. TO also harbored an early-stage larva (0.9 mm long) of Argulus sp. (Fig. 1E) on the body surface. Two species of Argulus, A. japonicus Thiele, 1900 andA. coregoni Thorell, 1884, are known to infect wild freshwater fish in Japan (Nagasawa, 2009(Nagasawa, , 2011), but these species cannot be differentiated from each other at early stages of their larvae (Shimura, 1981). Thus, the larval specimen collected is ...Similar publications
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Background
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Citations
... The parasites reported from Rhinogobius spp. in Japan between the years 1939 and 2018. The scientific names of the hosts follow Akihito et al. (2013), Hosoya (2015, and Takahashi and Okazaki (2017 Shimazu (1995Shimazu ( , 2007Shimazu ( , 2015, Urabe et al. (2012) Genarchopsis gigi Yamaguti, 1939 (2008) Inversiunio yanagawensis (Kondo, 1982) Fukuhara et al. (1986Fukuhara et al. ( , 1990, as Anodonta woodiana), Kondo (1989, as Anodonta woodiana;, as "dobu-gai"), Kondo et al. (1996, Nagasawa and Torii (2015) * The prefectures are listed from the north to the south. ** Not reported. ...
Four species of acanthocephalans are reported from gobies of the genus Rhinogobius in western and central Japan: Acanthocephalus gotoi Van Cleave, 1925 from Rhinogobius similis in the Kamo River (Hiroshima Prefecture) and Rhinogobius sp. OR (=orange type) in the Sōja River (Ehime Prefecture) and the Hiwatashi River (Kōchi Prefecture); Acanthocephalus longiacanthus Katahira and Nagasawa, 2014 from Rhinogobius nagoyae and Rhinogobius sp. OR in the Tenchi River (Hiroshima Prefecture), Rhinogobius fluviatilis in the Kamo River, and Rhinogobius sp. OR in the Sōja and Hiwatashi rivers; Acanthocephalus minor Yamaguti, 1935 from Rhinogobius flumineus in the Aruji River (Hiroshima Prefecture); and Southwellina hispida (Van Cleave, 1925) from Rhinogobius flumineus in the Aruji River and the Shika River (Kyōto Prefecture). All these collections represent new host records for the acanthocephalans. New prefecture records are A. gotoi and A. longiacanthus from Hiroshima and Kochi prefectures, and A. minor and S. hispida from Hiroshima Prefecture. Based on the previous and present papers published between the years 1935 and 2018, 48 nominal and some unidentified species of the parasites have been reported from the Japanese Rhinogobius spp. The nominal species include: 3 species in the Myxozoa (Cnidaria); 1 species in the Monogenea; 16 species in the Trematoda; 4 species in the Cestoda (all Platyhelminthes); 3 species in the Nematoda; 5 species in the Acanthocephala; 15 species in the Bivalvia (Mollusca); and 1 species in the Copepoda (Arthropoda).
Postmetamorphic adult females of the lernaeid co-pepod Lernaea cyprinacea Linnaeus, 1758 were collected from Rhinogobius similis Gill, 1859 (Gobiidae) from the lower reaches of the Arida River, Wakayama Prefecture, central Japan. This represents the first record of L. cyprinacea from Wakayama Prefecture. The females were all attached by peritrich ciliates in the anterior region of the trunk.
