著者

Sota Nishimoto 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.23-30, 2023-02-18 (Released:2023-02-18)

参考文献数

23

被引用文献数

2

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We studied the artificial incubation method of red swamp crayfish Procambarus clarkii embryos using cell culture plates. In the first experiment, cleavage stage embryos or egg-nauplius stage embryos were individually cultured at 20°C in the well of cell culture plates with different water volumes per well [12 well (4 ml), 24 well (2 ml), 48 well (1 ml) and 96 well (0.25 ml)]. In the second experiment, egg-nauplius stage embryos were cultured using 12-well plates at 15, 20 and 25°C. Almost all cleavage stage embryos died without hatching. Egg-nauplius stage embryos survived to hatch. In the 96-well plates, the embryo hatched, but all first instar juveniles died soon. In other plates, the mortality of the first instar juveniles tended to increase with decreasing culture water volume; particularly, high mortality was recorded in the 48-well plates. Hatching and moulting rates were high at 15°C and 20°C, but approximately half of the first instar juveniles died at 25°C. We concluded that a 12-well cell culture plate (4 ml per well) is suitable for incubating P. clarkii embryos to hatch and the first instar juveniles to moult to the second instar at 15–20°C.

著者

Yohei Kawakami Katsuyuki Hamasaki Shuji Kondo Shigeki Dan

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.52, pp.1-13, 2023-01-18 (Released:2023-01-18)

参考文献数

44

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We examined the survival and moulting of starved early-stage-zoeae of atyid shrimps—amphidromous Paratya compressa and landlocked Paratya improvisa—under different salinity and temperature conditions to attain a better understanding of larval adaptation to freshwater environments in landlocked shrimp. The first stage zoeae were cultured without foods under 25 combinations of different salinity (0, 8.5, 17, 25.5, and 34 ppt) and temperature (20, 23, 26, 29, and 32°C) levels. The larvae of P. compressa did not moult, whereas larvae of P. improvisa are lecithotrophy and moulted to the third stage zoeae at 0–25 ppt (and rarely to the fourth stage zoeae at 8.5–25 ppt). However, all larvae lost the ability to moult in open seawater conditions of 34 ppt salinity. The larval survival time was not largely different between these two species, even though the first stage zoeae of P. improvisa were much larger than those of P. compressa. The larvae of P. improvisa advanced the development shorter rather than surviving longer under starvation conditions. These findings suggest that the starvation tolerance, that is, lecithotrophic faster developmental rate of early stage zoeae of landlocked P. improvisa, adapted better to stay in or near parental habitats as well as to limited food conditions in freshwater environments.

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

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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

Wataru Doi Ren Kikuchi Akira Mizutani Hiroyoshi Kohno

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.137-145, 2022-12-06 (Released:2022-12-06)

参考文献数

36

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To characterize the reproductive behavior of the land crab Cardisoma carnifex, their nighttime activities on the ground surface around their burrows were monitored using infrared-triggered cameras on the Iriomote-jima Island, Japan. Matings of three pairs were recorded near the entrance of the female’s burrow. The results showed that the species shares a common mating pattern of gecarcinids: hard-female mating and short courtship. The males did not exhibit courtship behavior, except for drumming on the surface sediment. The duration of copulation was longer (29, 30, and 49 min) than that in the reference data (1–10 min). After mating, males guarded their mate’s burrow and plugged the opening from the outside. By contrast, the resident crabs sometimes plug their burrows from the inside. Burrow plugging by C. carnifex males is similar to post-copulatory guarding by males of brachyurans, to prevent multiple matings by females. The non-invasive cameras revealed novel features of mating behavior of C. carnifex such as longer copulation, drumming behavior, and burrow plugging by males.

著者

Tetsuya Sanda Tomohito Shimizu Shigeki Dan Katsuyuki Hamasaki

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.129-135, 2022-11-09 (Released:2022-11-09)

参考文献数

23

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Temperature is one of the most important environmental factors affecting the geographic distribution of ectotherms. We evaluated the low- and high-temperature tolerance limits of juveniles of two mud crab species, Scylla paramamosain and Scylla serrata, which are distributed in temperate and subtropical/tropical areas in Japan, respectively. Experiments were performed twice for S. paramamosain and four times for S. serrata using laboratory-raised juveniles. The juveniles were stocked in small containers, and the temperature was reduced or raised by 1°C every 24 h. The critical low or high temperatures (CLT or CHT) were estimated as the temperatures at which 50% of test juveniles ceased walking behaviour or died. The estimated CLT values for walking and survival were summarised as 8.4±0.7°C (mean±standard deviation) and 6.4±0.9°C in S. paramamosain and 9.6±0.6°C and 7.4±0.4°C in S. serrata, respectively. The CHT for walking could not be estimated, as almost all surviving juveniles exhibited walking behaviour, whereas the estimated CHT values for survival were summarised as 39.0±0.4°C in S. paramamosain and 39.1±0.6°C in S. serrata. Thus, interspecific variation in low-temperature adaptation was evident, and S. paramamosain are adapted to the lower-temperature environment.

著者

Noriko Azuma Masamichi Kuroda Yuichi Katogi Susumu Chiba

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.123-127, 2022-11-09 (Released:2022-11-09)

参考文献数

12

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We developed short tandem repeat markers for Palaemon septemtrionalis and tested their utility for analysing population genetics. Six markers were selected for their genotyping ability and suitability for population genetic analyses, and the genetic differences between two populations from different rivers were evaluated using these markers. The pairwise fixation index value between the two populations was 0.01756 (P=0.036), weak but statistically significant, suggesting a low level of genetic differentiation between the two populations. Although the results were not fully conclusive, we are confident these markers can be utilised for investigating the genetic population structure of P. septemtrionalis.

著者

Peter K. L. Ng Paul F. Clark

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.115-121, 2022-10-21 (Released:2022-10-21)

参考文献数

19

被引用文献数

1

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An un-named Eosamon Yeo & Ng, 2007 (Brachyura: Potamidae) specimen was discovered in the reference collection of the Natural History Museum, London. Further investigation of this freshwater crab proved it to be of interest because it is the first record of the genus from Cambodia and the male to be a hitherto undescribed Eosamon species. The new species, E. cambodiense n. sp., is here described, illustrated and compared with other congeners: E. brousmichei (Rathbun, 1904), E. paludosum (Rathbun, 1904), E. hafniensis (Bott, 1966), E. yotdomense (Naiyanetr, 1984), E. boonyaratae (Naiyanetr, 1987), E. phuphanense Naiyanetr, 1992, and E. nominathuis Yeo, 2010.

著者

Sota Nishimoto Katsuyuki Hamasaki Shigeki Dan

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.103-110, 2022-09-17 (Released:2022-09-17)

参考文献数

32

被引用文献数

3

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The red swamp crayfish Procambarus clarkii is an invasive alien species worldwide but it was commercially exploited. Laboratory studies have been conducted to examine the reproductive aspects of this species, pairing males and females for 1–5 days, as a basis for developing the control measures for invasive populations and improving aquaculture technologies. However, the effect of pairing periods on the mating and spawning success is largely unknown, and the present study therefore aimed to elucidate the effect of different periods (one, five and 10 days) in this species. The pairs were videorecorded for each entire pairing period, and the length of pairing did not significantly affect copulation or spawning. Copulation was prolific on the first day and its intensity was similar among the test groups, indicating that a one-day pairing period is sufficient for successful mating in P. clarkii under laboratory conditions.

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

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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

Karl J. Wittmann

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.55-89, 2022 (Released:2022-07-23)

参考文献数

53

被引用文献数

1

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Three ANDEEP expeditions yielded five Petalophthalmidae species of the genus Hansenomysis in 1030–3683 m depth on the floor of the Southern Ocean. Hansenomysis pseudophthalma sp. nov. is distinguished by features of the carapace, antenna, and telson. A fully adult specimen is first described for H. chini. A world key to the species of Hansenomysis is given. Unlike certain previous interpretations, the dactylus of thoracic endopods 3–5 has a single claw opposing a pair of modified paradactylary setae. Propodus and dactylus 6–8 are separate, not fused, and bear a smooth nail in all Hansenomysis species examined. Juveniles were available in three species and start with two bulb-shaped eye rudiments inside a common cuticular sheath forming a transverse bar. The bulbs then flatten, although a bulb-like formation persists until the adult stage; no eyeplate is formed. The carapace bears hepatic bulges resembling eyes in adult H. pseudophthalma and H. chini. The distal hyaline coat of bulges possibly represents lenses in H. pseudophthalma and H. sorbei. The modification of bulges is indicative of photophores, described for the first time here in the family Petalophthalmidae. The exclusive occurrence of mature photophores in adults points to possible role in reproductive behavior.

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

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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

Satoshi Kobayashi Miguel Vazquez Archdale

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.51, pp.17-29, 2022-02-01 (Released:2022-02-01)

参考文献数

38

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This is the first record of the burrows of the Japanese mitten crab Eriocheir japonica. Morphologies of the burrows found in the clay sediment used by this crab were recorded by excavating them in a small freshwater river in Japan. Only E. japonica was found inside 2 of the 10 burrows examined (15 crabs and one crab, respectively), and the other 8 were empty. Crabs of various sizes (6.1–47.0 mm in carapace width) were collected from inside the occupied burrows. Burrow morphology ranged from single tunnels to complex burrows with multiple openings and tunnels. Openings (2–10 cm in diameter) were mostly located underwater. The single tunnels were 14–65 cm long. Considering the different digging habits of other burrowing animals found in this area, it can be concluded that E. japonica constructed these burrows. Burrows resembled those of the Chinese mitten crab E. sinensis, but were different in their location (freshwater vs. tidal), sediment type (clay vs. sand and silt), opening placement (mainly underwater vs. intertidal) and occupation rate (low vs. high). The low occupation rate suggests that E. japonica do not always rest in their burrows and rather prefer to hide beneath the riverbed’s large rocks. These results reflect the adaptation of E. japonica to the unstable environment of Japanese rivers.

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

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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.

著者

酒井 恒

出版者

Carcinological Society of Japan

雑誌

甲殻類の研究 (ISSN:24330108)

巻号頁・発行日

vol.10, pp.73-84a, 1980 (Released:2017-09-08)

被引用文献数

2 3

著者

Tetsuya Sanda Tomohito Shimizu Shigeki Dan Katsuyuki Hamasaki

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.87-93, 2021-07-03 (Released:2021-07-03)

参考文献数

21

被引用文献数

2

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Cannibalism is considered a major cause of mortality among juveniles in nursery cultures of the mud crab Scylla serrata. Size grading is recommended as an effective measure to mitigate cannibalistic behavior; however, little is known about how body size differences influence cannibalistic episodes between juvenile individuals. We conducted one-to-one match experiments using hatchery-raised juveniles with carapace width between 12.5 and 33.3 mm. Two crabs were placed in an experimental arena for 24 h, and survival and pereiopod loss were subsequently observed. Large crabs always preyed on small crabs, and the probability of cannibalistic behavior significantly increased with the increasing relative size difference [RSD=1−(size of small crab)/(size of large crab)]. The loss of chelipeds and walking legs in the surviving small crabs amounted to 25% and 38%, respectively, and the proportion of lost walking legs increased with the increasing RSD, indicating the stronger aggressive behavior of larger crabs. This study suggests that maintaining size differences below the RSD threshold (0.34) at which 50% of the small crabs are cannibalized by large crabs would be an effective strategy to contain the occurrence of cannibalism in mud crab nursery cultures.

著者

Peter K. L. Ng Bertrand Richer De Forges

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.95-101, 2021-07-13 (Released:2021-07-13)

参考文献数

6

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A new species of majid crab, Sakaija amicitiae n. sp., is described from New Caledonia Exclusive Economic Zone, Vauban seamount and the Chesterfield Atolls. The species is superficially similar to S. japonica (Rathbun, 1932) and S. santo Ng & Richer de Forges, 2015, from Vanuatu. Specimens from New Caladonia previously referred to S. santo are now referred to the new species. Sakaija amicitiae n. sp. can be distinguished from congeners by features of the carapace spines, proportions of the ambulatory legs and structure of the male first gonopod.

著者

Mary K. Wicksten

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.50, pp.103-106, 2021-09-16 (Released:2021-09-16)

参考文献数

15

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Three species of the sponge-dwelling lobster Eiconaxius are known from the eastern Pacific. Previous reports and descriptions were based on dead specimens. During a study by remotely operated vehicle, Eiconaxius baja was photographed in situ at the San Juan Seamount within a sponge of the family Phariidae. It tried to escape by swimming backward. Illuminated by the lights of the vehicle, the lobster had an orange color. The depth at which the lobster lives has no ambient light, so the function of the color remains uncertain.

著者

Mitsukazu Mitsugi Yoko Hisamoto Hiroshi Suzuki

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.46, pp.83-94, 2017 (Released:2017-03-10)

参考文献数

34

被引用文献数

3 6

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An invasive freshwater shrimp of the genus Neocaridina Kubo, 1938 (Decapoda: Caridea: Atyidae) was collected from the Tomoe River of the Boso Peninsula, Tateyama City, Chiba Prefecture, eastern Japan. We compared the morphological characteristics and mitochondrial DNA sequence variation of the specimens with those of other Neocaridina species. In particular, we assessed the mitochondrial DNA region encoding the NADH dehydrogenase subunit 2 [ND2] gene and the region encoding the NADH dehydrogenase subunit 5 [ND5] gene. Our specimens are most likely to be Neocaridina davidi (Bouvier, 1904), a species native to mainland China. This species may have entered Japan through intentional disposal or accidental escape from aquaria.

著者

Mai Hibino Koji Matsuzaki Kooichi Konishi

出版者

Carcinological Society of Japan

雑誌

Crustacean Research (ISSN:02873478)

巻号頁・発行日

vol.49, pp.9-14, 2020-01-15 (Released:2020-01-15)

参考文献数

23

被引用文献数

2

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First stage larva of the deep-sea giant shrimp, Sclerocrangon rex is described and illustrated under laboratory conditions. The larvae hatched in the most advanced condition, such as in having stalked eyes, among the congeneric species with abbreviated development. The newly hatched first larvae were staying together by clinging maternal pleopods until the second stage.

著者

酒井 勝司

出版者

Carcinological Society of Japan

雑誌

甲殻類の研究 (ISSN:24330108)

巻号頁・発行日

vol.15, pp.23-28a, 1986 (Released:2017-09-08)

被引用文献数

9 10

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Upogebia narutensis sp. nov. is the fourth upogebid species found in the Inland-Sea, Japan. This species is closest to U. spinifrons from Australia.