著者

Tohru Naruse Mathilde Richer de Forges Bertrand Richer de Forges Daisuke Uyeno

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.49, pp.33-39, 2020-03-09 (Released:2020-03-09)

参考文献数

11

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A rare xanthid crab species Cyrtocarcinus truncatus (Rathbun, 1906) is recorded from Ouvéa, Loyalty Islands, New Caledonia, and Ishigaki Island, Ryukyu Islands, Japan. This represents the first record of the species from outside Hawaii. Morphological features and its variations are described in detail.

著者

Nobuhiro Saito Hiroki Fujita

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.47-54, 2022-07-02 (Released:2022-07-02)

参考文献数

25

被引用文献数

2

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Here, the aegathoid stage of Nerocila japonica Schioedte & Meinert, 1881 is described based on a specimen collected from the Seto Inland Sea, Japan, and its identity is confirmed by both morphology and molecular barcoding. Cytochrome c oxidase subunit I and 16S rRNA sequences of the collected individual shared ≥99% similarity with the previous DNA records of N. japonica. In terms of morphology, the aegathoid stage of the specimen examined in the present study differed from that of N. phaiopleura Bleeker, 1857 by intermediate size of the eyes and setation on pereopods. This is the first record of N. japonica infesting the red seabream Pagrus major (Temminck & Schlegel, 1843).

著者

Seinen Chow Katsuyuki Hamasaki Kooichi Konishi Takashi Yanagimoto Ryota Wagatsuma Haruko Takeyama

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.52, pp.31-48, 2023-02-18 (Released:2023-02-18)

参考文献数

69

被引用文献数

1

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Lithodoid and paguroid crabs are morphologically assigned to the superfamilies Lithodoidea and Paguroidea, respectively. Molecular analyses, however, have revealed closer genetic proximity of the lithodoid crabs to the family Paguridae than to other families of Paguroidea, provoking a long debate. We investigated the length and nucleotide sequence variation of the nuclear ribosomal DNA internal transcribed spacer 1 (ITS1) in lithodoid and paguroid species. Uniquely short ITS1s (215–253 bp) were observed in seven lithodoid species. In contrast, ITS1 length varied considerably in 13 paguroid species belonging to the families Coenobitidae, Diogenidae, and Paguridae. Short-to-long ITS1s (238–1090 bp) were observed in five species of the family Paguridae, and medium to long ITS1s (573–1166 bp) were observed in eight species of the families Coenobitidae and Diogenidae. Considerably different size ITS1s coexisted in individual paguroid species. Nucleotide sequence analysis indicated that the short ITS1s observed in the family Paguridae were descendants of longer ITS1s and were homologous to the short ITS1 of lithodoid species. ITS1 sequences of the families Coenobitidae and Diogenidae shared no nucleotide elements with lithodoid and pagurid species. These molecular signals indicate that the short ITS1 in pagurid lineage was passed on to lithodoid lineage, strongly supporting the “hermit-to-king” crab hypothesis.

著者

Hiroki Fujita Tetsuya Umino Nobuhiro Saito

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.29-31, 2021-04-02 (Released:2021-04-02)

参考文献数

13

被引用文献数

6

著者

Takeshi Sasaki Tohru Naruse

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.43, pp.31-40, 2014-12-15 (Released:2017-05-15)

被引用文献数

2 3

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Acorn foraging activity and feeding behaviour by two species of potamid freshwater crabs (Geothelphusa grandiovata and Candidiopotamon okinawense) were studied at Yanbaru forest, northern Okinawa Island, Ryukyu Islands, Japan. Adult females of the two species were observed to inhabit burrows that were filled with acorns of Castanopsis sieboldii and Quercus miyagii. The burrows with the crabs as well as gathered acorns were distributed relatively close to a stream (0.8-5 m) at slopes of the forest. Acorns were either eaten with a part of the lower part or seed coat remaining, or vertically broken up and only the inside consumed. Feeding experiments under laboratory conditions indicated that the acorns eaten by G. grandiovata had the same feeding scars as the ones found around crabs burrows, suggesting that the crabs were indeed feeding on acorns. There were 1-24 uneaten acorn(s) observed from all burrows with gathered acorns. Some of the uneaten acorns were even germinated at both around opening of and in the burrow. The accumulation of acorns by the crabs thus inadvertently helps the dispersal of C. sieboldii and Q. miyagii along the slopes of valleys, where the seeds cannot easily lodge and germinate.

著者

Motoki Tanaka Katsuyuki Hamasaki Shigeki Dan

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.52, pp.69-78, 2023-09-01 (Released:2023-09-01)

参考文献数

24

被引用文献数

1

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We conducted two laboratory experiments to evaluate the dietary effects of phytoplankton and zooplankton on the larval survival, duration and growth of the amphidromous atyid shrimp Atyopsis spinipes. In the first experiment, commercially preserved or cultured phytoplankton Tetraselmis sp. and cultured zooplankton rotifers were used to rear larvae. In the second experiment, cultured Tetraselmis and rotifers were used to feed larvae for 17 days after hatching, after which the effect of supplementing their diet with Artemia nauplii was tested. The effects of different culture vessel volumes (8 mL and 40 mL) on larval performance were also assessed. In the first experiment, larvae fed only with preserved Tetraselmis did not survive to the juvenile stage, whereas larvae fed with rotifers showed better survival and development. In the second experiment, most larvae receiving Artemia supplementation survived to the juvenile stage. Larvae cultured in larger containers (40 mL) had significantly higher survival rates than those cultured in smaller containers (8 mL). The present study demonstrates larval culture methodologies for A. spinipes that can promote the development of larvae into the juvenile stage with high survival rates.

著者

セレーン ラオール 小田原 アキ子

出版者

Carcinological Society of Japan

雑誌

甲殻類の研究 (ISSN:24330108)

巻号頁・発行日

vol.4.5, pp.71-74, 1971 (Released:2017-09-08)

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歴史と観察-酒井(1938)は,瀬戸(白浜)産,59×31のオスのnipponesisについて述べている。酒井に依れば,本種は次の点で大西洋産Portunus vocans A.M.E.と異なる。1)甲殻の後部が狭くなっている。2)前側縁歯は基部が幅広く先が尖っていない。3)心域は明確に稜線をなしていない。4)前鋼線は前方に向って強くカーブしている。5)鋏脚の長節には2棘でなく3棘ある。6)鋏脚長節の擦音器の棹は中途で途切れている。現在ある雌の標本は酒井(1938,1939)の観察引例と説明に一致する。鋏脚の長節の僅かな差異は恐らく標本の性差に依るのであろう。即ち(1)前縁において(第三の)後縁歯は酒井(1938)の標本よりも短かく,明かに未発達である。(2)発音器り桿は酒井の図ほど明確ではないが途切れている。前側縁腹面の発音桿が下眼窩の外葉の歯状縁に接して居り,又vocansについてラスバン(1930)が報告しているものと近似していることを記述する。酒井の図(1938)は,この点が相違している。窩眼外角は第一前外歯(酒井の第二,1938)の背面に位置する。即ち発音器の桿(本標本では27ある)の列は末端が下眼窩の外業の縁の5歯になっていることである。異る特徴の1の価値を正確にするために甲殻の後縁幅の長さを前側縁歯端間の最大計測値で比べてみた。この標本では甲殻の最大幅は後縁の幅の3.7倍である。それはnipponensisのType標本とは似ているが一方vocansではたった3.1倍でしかない。測定値はnipponensisのTypeについては酒井(1938)の図により,vocansについてはRathbun(1930)の図によった。ボルネオのPontianakからの標本記録はその地理的分布をかなり拡げた,そして本種は恐らく広くインド洋太平洋に分布しているという酒井(1938)の見解を確証した。私はエドモソソソ(1935)の標本即ちオアフ(ハワイ)採集の6×11の♂はnipponensisの幼型であるとする酒井(1938)の考えと一致している。タイプ標本の棲息環境は報告されていたい。現標本が77mの深さで採集された事は海岸近くにはなく又その記録の珍らしさを示している。

著者

Kooichi Konishi Munehiro Takami Takashi Yanagimoto

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.1-7, 2021 (Released:2020-12-24)

参考文献数

23

被引用文献数

2

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A morphological description is given for the postlarval specimen of the polychelid lobster, Pentacheles laevis, collected from Suruga Bay, on the Pacific coast of Japan. The specimen has been previously identified using the DNA barcoding method. Diagnostic larval characters distinguishing the previously known postlarvae in three genera, Pentacheles, Stereomastis, and Polycheles, are also noted.

著者

Retori Hiraoka Hirohiko Teishima Teruhiro Takabe Teruaki Suzuki Yoshito Tanaka

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.9-15, 2021 (Released:2020-12-24)

参考文献数

32

被引用文献数

1

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The nonnative freshwater shrimp Palaemon sinensis (Sollaud, 1911) has been reported at various locations in Japan. This study compared environmental DNA (eDNA) analysis with conventional capturing and investigation as a method to detect P. sinensis in the Tama River. We developed species-specific primers to amplify a 225-bp fragment of the cytochrome c oxidase subunit I gene for eDNA analysis. The invasive shrimps were detected using eDNA analysis in all areas where they were observed using the capture and investigation method. Thus, eDNA analysis can be applied to detect sparsely distributed P. sinensis in the Tama River, making it a useful method to detect invasive shrimps and to help prevent ecological disruption.

著者

Katsuyuki Hamasaki Minako Ishii Shigeki Dan

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.17-27, 2021-02-23 (Released:2021-02-23)

参考文献数

51

被引用文献数

1 8

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We investigated the seasonal variability in fecundity and egg size in a Petrolisthes japonicus population by monthly sampling for one year on an intertidal cobble and boulder shore on the Boso Peninsula, Japan. Fecundity (number of eggs per brood) was determined for ovigerous females with non-eyed or eyed eggs in early (May and June), middle (July) and late (August and September) breeding periods. The long and short diameters of non-eyed eggs were measured, and the egg volume was calculated. Fecundity was positively correlated with female body size and found to be greater in the middle breeding period than in the early and late breeding periods. Egg loss occurred during embryogenesis, the egg loss rate being calculated as 44.6%, 14.8% and 30.2% from the non-eyed to the eyed egg stages in the early, middle and late breeding periods, respectively. Egg size decreased linearly from the early to the late breeding periods. It is inferred that the seasonal variability in reproductive output, fecundity and egg size in P. japonicus may be regulated by female nutritional conditions and seasonal fluctuations of food production for larvae, as well as a trade-off between the number and size of eggs in a brood.

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

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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

Peter K. L. Ng

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.65-73, 2021-06-25 (Released:2021-06-25)

参考文献数

26

被引用文献数

4

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A new genus and new species of potamid freshwater crab, Xestomon tacu, is described from Ta Kou mountain in southern Vietnam. The new genus is characterised by its transversely ovate and smooth carapace surface, the very low to undiscernible epigastric and postorbital cristae, complete absence of a flagellum on the third maxilliped, relatively short ambulatory legs, a male telson which is acutely triangular with the lateral margins distinctly concave, and a short stout male first gonopod which has the terminal segment gently curved upwards.

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

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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

村山 修 中谷 勇 西田 満

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.23, pp.69-73, 1994-10-26 (Released:2017-05-15)

被引用文献数

6 5

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成体のアメリカザリガニProcambarus clarkii(頭胸甲長30-35mm)の鉗脚前節内部の組織を針で引っかき、また幼弱個体(頭胸甲長8-12mm)の鉗脚前節の一部を押しつぶして過剰再生体を誘発した。この再生体は、傷をつけてから第一回目の脱皮で突起状の構造物として生じた。構造物のなかには第二回目の脱皮で枝別れしたものもあった。しかし、枝別れした構造物でも関節は形成されなかった。成体の過剰再生体の先端には鈎爪が形成されていた。

著者

Ken-Ichi Hayashi Michio Nagata

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.31, pp.73-90, 2002 (Released:2017-05-15)

参考文献数

60

被引用文献数

2 3

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During a taxonomic study of the snapping shrimp genus Alpheus from Japan and the Gulf of Thailand, it has been found that two species have been confounded under A. digitalis De Haan, 1844, which was originally described based on a single specimen possessing abnormal chelipeds. Differences between the two species are found in both morphology and coloration. Careful examination of published information of the holotype and supplemental material enable us to establish the true identity of A. digitalis. The new species, A. longiforceps, can be distinguished from A. digitalis by the more slender major chela with a sinuous, rather than convex, flexor margin, the longer male minor chela with a more elongate dactylus, and the possession of a single, rather than two, obliquely transverse white bands on the carapace and of a conspicuous dark brown spot on the lateral surface of the fourth abdominal tergum.

著者

Magdalini Christodoulou Thomas M. Iliffe Sammy De Grave

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.48, pp.11-21, 2019-03-16 (Released:2019-03-16)

参考文献数

16

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A new species of the alpheid shrimp genus Potamalpheops Powell, 1979 is described from an anchialine cave on Nggela Pile Island, Solomon Islands. Potamalpheops nazgul sp. nov. belongs to the P. monodi (Sollaud, 1932) species group, defined by the presence of two pairs of cuspidate setae on the distal margin of the telson and feebly or non-enlarged chelipeds. The new species is morphologically closer to P. pininsulae Bruce & Iliffe, 1992 and it is characterised among others by the presence of a well-developed antero-mesial tubercle on the eyestalk, a short rostrum with a dentate ventral carina, a toothed distal margin of first antennular segment and a non-strongly inflated carapace. The description of this new species raises the number of known species of Potamalpheops to fifteen.

著者

Kooichi Konishi Munehiro Takami Takashi Yanagimoto

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.52, pp.55-67, 2023-08-31 (Released:2023-08-31)

参考文献数

42

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A morphological description of the postlarval specimen of the polychelid lobster Stereomastis panglao Ahyong & Chan, 2008, collected from Suruga Bay, on the Pacific coast of Japan, and at depths of 1,305–1,565 m, was given for the first time. Larval characteristics of the previously known polychelid postlarvae and the distribution range of S. panglao were also noted.

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

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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

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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

Peter K. L. Ng

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.52, pp.15-21, 2023-02-18 (Released:2023-02-18)

参考文献数

10

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The male of the rare deep-water porter crab, Dicranodromia danielae Ng & McLay, 2005 (Homolodromiidae) is reported for the first time from Mindanao in the southern Philippines. The species was previously only known from the holotype female from Panglao in central Philippines. The diagnostic male characters are described and variation in various characters documented.