- 著者
- Kazuya Nagasawa
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.50, pp.55-64, 2021-04-01 (Released:2021-04-01)
- 参考文献数
- 28
- 被引用文献数
- 1 3
A single ovigerous female of cymothoid isopod was collected from the branchial cavity of the African sailfin flyingfish, Parexocoetus mento (Valenciennes, 1847) in Kadogawa Bay, an inlet of the western North Pacific Ocean, southern Japan. Although the isopod specimen differs from Norileca triangulata (Richardson, 1910) in the number of articles of the antennula and the absence of small setae on the propodus of pereopods 1 and 2, it is similar to the species. However, the species was poorly originally described, and there are several differences between the original and subsequent descriptions and the specimen. Thus, this study refrains from identifying the specimen to species and reports it as N. aff. triangulata. This represents the first record of Norileca from Japan. Five species of cymothoid isopods including N. aff. triangulata are now known from Japanese flyingfishes, and a parasite-host list is provided.
- 著者
- Daisuke Uyeno Tadashi Tomizono Yoshiyuki Osako Kazuya Nagasawa
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.50, pp.75-86, 2021-06-25 (Released:2021-06-25)
- 参考文献数
- 41
- 被引用文献数
- 1
A lernaeid copepod, Lamproglena chinensis Yü, 1937, is redescribed based on the newly collected specimens from the snakehead Channa argus (Cantor) (Actinopterygii: Perciformes: Channidae) caught in Lake Imuta, Satsumasendai, Kagoshima Prefecture, Kyushu, southern Japan and the type specimens of L. ophiocephali Yamaguti, 1939, a junior synonym of L. chinensis, from the Kizu River, Kyoto Prefecture. The adult male was found from Japan for the first time. The collection of the species in this study represents the first record from Kyushu. The previous records of L. chinensis and its related species reported from Asian countries are also reviewed.
- 著者
- Kazuya Nagasawa
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.25, no.2, pp.369-375, 2020-11-16 (Released:2020-11-17)
- 参考文献数
- 44
- 被引用文献数
- 8
Females of the lernaeopodid copepod Salmincola markewitschi Shedko and Shedko, 2002 were collected from the buccal cavity of whitespotted char, Salvelinus leucomaenis (Pallas, 1814), in a mountain stream of Nagano Prefecture, Honshu Island, the largest main island of Japan. The females are described as the first record of S. markewitschi from Honshu Island, because the species has so far been reported from the Russian Far East and the southern Kuril Islands east of Hokkaido Island, Japan. The copepod previously reported as Salmincola californiensis (Dana, 1852) from the same host species from the same stream and a nearby hatchery is herein regarded as S. markewitschi. As the species closely resembles Salmincola carpionis (Krøyer, 1837), it is desirable to re-identify the copepod specimens reported before as S. carpionis from Japanese salmonids, especially Salvelinus spp. Contraction of the formalin-fixed and preserved specimens, especially their second maxillae, of S. markewitschi is discussed. Information on the known hosts and distribution records of S. markewitschi is also compiled.
- 著者
- Kazuya Nagasawa
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.19, no.2, pp.151-156, 2014-11-25 (Released:2018-03-30)
- 被引用文献数
- 1 2
An adult male specimen of the amphibian acanthocephalan Acanthocephalus lucidus Van Cleave, 1925 was isolated from the intestine of a whitespotted char, Salvelinus leucomaenis leucomaenis (Pallas, 1814), collected from a stream in Aomori Prefecture, northern Japan. This represents the second record of fish infection by this species of acanthocephalan. The life cycle of A. lucidus is discussed, and the char is assumed to have become infected by preying on a frog harboring the specimen. The known vertebrate hosts of A. lucidus and the geographical distribution of this species in Japan and East Asia are tabulated.
- 著者
- Kazuya Nagasawa Yoshiyuki Okamoto
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.52, pp.91-95, 2023-12-04 (Released:2023-12-04)
- 参考文献数
- 11
Examination of Japanese eels Anguilla japonica Temminck & Schlegel, 1846 from Kadota Reservoir, Fukuoka Prefecture, western Japan, revealed the infection by Argulus mongolianus Tokioka, 1939 in the eel buccal cavity. This is the second record of A. mongolianus in Japan and extends its distributional range from Miyagi Prefecture, northern Honshu, southwestward to Fukuoka Prefecture, northern Kyushu. Anguilla japonica represents a new host record. The specimens of both sexes of A. mongolianus are briefly described. This paper suggests that the parasite has been co-introduced with non-native fish hosts into Kadota Reservoir and other inland waters in northern Kyushu.
- 著者
- Kazuya Nagasawa Hidekazu Suzuki
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.52, pp.49-54, 2023-04-04 (Released:2023-04-04)
- 参考文献数
- 9
Markevitchielinus anchoratus Titar, 1975 is reported based on an adult female from the floor of the buccal cavity of a sea raven Hemitripterus villosus (Pallas, 1814) caught in Onagawa Bay, an inlet of the Northwestern Pacific Ocean, Miyagi Prefecture, northern Japan. The female specimen is briefly described. The female inserted its head with a pair of large, lateral processes and the anterior part of an elongate neck into the tissues of the buccal cavity floor. The present collection of M. anchoratus represents the third occurrence record of the species and extends its distributional range from Kunashiri and Shikotan islands, east of Hokkaido, to Onagawa Bay off Honshu, the largest main island of Japan. The species is specific to the sea raven and may be a subarctic species.
- 著者
- Kazuya Nagasawa Kenyu Suzuki Fumihito Muto
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.51, pp.147-152, 2022-12-06 (Released:2022-12-06)
- 参考文献数
- 19
The pennellid copepod Lernaeenicus ramosus Kirtisinghe, 1956 is a marine fish parasite in the Indo-West Pacific region. Serranid fishes (Perciformes) are the major hosts of L. ramosus, and as its non-serranid host, a single blenniid fish (Blenniiformes) is known from Australia. A metamorphosed ovigerous female of L. ramosus was collected from a grub fish, Parapercis sexfasciata (Temminck & Schlegel, 1843) (Perciformes: Pinguipedidae), in coastal waters of Suruga Bay, an inlet of the western North Pacific Ocean, Shizuoka Prefecture, central Japan. This represents a new and the second non-serranid host records for L. ramosus and it is also the first record from a pinguipedid fish. The female is briefly described. A pennellid copepod previously reported as “Pennella sp.” from the same host species from the Iyo-Nada Sea, part of the Seto Inland Sea, western Japan, is considered to be L. ramosus.
- 著者
- Kazuya Nagasawa Shigehiko Urawa
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.51, pp.91-101, 2022-08-26 (Released:2022-08-26)
- 参考文献数
- 36
- 被引用文献数
- 3
Two copepod parasites, Salmincola edwardsii (Olsson, 1869) and S. markewitschi Shedko & Shedko, 2002, were collected from salmonids in eastern Hokkaido, Japan: these copepods were taken from whitespotted char, Salvelinus leucomaenis (Pallas, 1814), and brook trout, S. fontinalis (Mitchill, 1814) in the Nishibetsu River, and Salmincola edwardsii from southern Asian Dolly Varden, Salvelinus malma krascheninnikova Taranetz, 1933, in the Ichani River. Both whitespotted char and brook trout are new Japanese hosts for Salmincola edwardsii, and the two rivers represent new locality records for S. edwardsii and S. markewitschi. The Nishibetsu River is regarded as a new southernmost distribution limit of S. edwardsii in Asia and is also recorded as the first locality of S. markewitschi infecting wild salmonids in Hokkaido. The morphology of S. edwardsii and S. markewitschi is reported based on adult female specimens collected from the salmonids.
- 著者
- Kazuya Nagasawa Kouki Mizuno
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.51, pp.31-38, 2022-03-11 (Released:2022-03-11)
- 参考文献数
- 18
- 被引用文献数
- 1
An ovigerous female of Argulus matuii Sikama, 1938 was collected from the body surface of a yellowfin seabream Acanthopagrus latus (Houttuyn, 1782) in a cove facing the Bungo Channel off Ehime Prefecture, western Japan. This represents a new host record for A. matuii, and the female collected is herein described. This female, which was fixed and preserved in 70% ethanol, showed a prominent body coloration, i.e., six streaks of yellow fringed with dark brown pigments, on the dorsal surface of the carapace even on 279th day (ca. nine months) after fixation, but the yellow streaks disappeared and the dark brown fringes were fading on 1675th day (ca. four years and seven months) after fixation. Thus, this paper reports on the usefulness of those yellow streaks in identification of A. matuii for a certain period after fixation but also emphasizes the importance of a detailed examination of morphological features in identification of long-term ethanol-preserved argulid specimens. The species is distinguished from the five marine congeners from Japan by its possession of numerous supporting rods in the marginal membranes of the first maxillae.
- 著者
- Kazuya Nagasawa Masanori Kawazu
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.51, pp.11-15, 2022-01-20 (Released:2022-01-20)
- 参考文献数
- 15
- 被引用文献数
- 1
The pennellid copepod Lernaeenicus ramosus Kirtisinghe, 1956 is a parasite of perciform and blenniiform fishes in the Indo-West Pacific region. A metamorphosed female of the species was collected from a perchlet, Chelidoperca hirundinacea (Valenciennes, 1831), caught on the neritic continental shelf of Suruga Bay, central Japan. The copepod is almost exclusively a parasite of groupers (Epinephelus spp.) in the serranid subfamily Epinephelinae, but C. hirundinacea belongs to a different serranid subfamily Serraninae. The present collection of L. ramosus represents its first record from a serranine fish in the Indo-West Pacific region.