著者
Nobuhiro Saito Takeo Yamauchi
出版者
日本甲殻類学会
雑誌
Crustacean Research (ISSN:02873478)
巻号頁・発行日
vol.45, pp.59-67, 2016 (Released:2016-12-05)
参考文献数
14
被引用文献数
1

Elthusa moritakii sp. nov., a branchial parasite of the deepwater bullhead sculpin Ereunias grallator, is described from Japan. The new species is morphologically similar to Elthusa propinqua (Richardson, 1904), but can be distinguished from the congener by a combination of characteristics of ovigerous females, including pereopods 5–7 with unexpanded carina, number of robust setae on maxilla, greatest width of pleon, shape of pleopods, and length of pleotelson. Further, new host records of E. propinqua are here reported. This species was recently collected from five macrourid fish species from Japan, including the grenadiers, Coelorinchus jordani, C. longissimus, the spearnose grenadier, C. multispinulosus, the unicorn grenadier, C. productus, and the Sagami grenadier, Ventrifossa garmani.
著者
笹塚 諒 浜崎 活幸
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.27, pp.57-59, 2018-08-01 (Released:2018-08-31)
参考文献数
6
著者
Zen Faulkes
出版者
日本甲殻類学会
雑誌
Crustacean Research (ISSN:02873478)
巻号頁・発行日
vol.44, pp.75-92, 2015 (Released:2015-11-17)
参考文献数
120
被引用文献数
2 10

The sale of crayfish in the pet trade has increased in recent decades, and a substantial fraction of the world's entire range of crayfish species is available in the pet trade. The market for pet crayfish creates two major concerns: the potential for over exploitation of natural populations of crayfish to supply the pet trade, and the negative consequences resulting from the release of non-indigenous crayfish into natural habitats. The chain from the source of crayfish to the final owner can be lengthy, and each step in the supply chain needs to be studied by different methods. While there are often regulations intended to limit the trade of crayfish as pets, they differ widely from place to place and seem to have limited success in changing the behaviour of owners of pet crayfish.
著者
山内 健生
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.25, pp.113-119, 2016-08-01 (Released:2016-10-20)
参考文献数
66
著者
柳本 卓 市村 政樹
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.27, pp.29-36, 2018-08-01 (Released:2018-08-31)
参考文献数
38

The three copepod species Clavella perfida (Lernaeopodidiae), Haemobaphes diceraus (Pennellidae), and Beringobdella rectangulata (Piscicolidae) parasitize the gills of the Alaska pollock, Gadus chalcogrammus (Gadidae). Parasite specimens were sampled from Alaska pollock collected from the Shiranuka and Shibetsu areas of Hokkaido, Japan and the eastern Bering Sea. We investigated whether each of the three parasitic copepod species are panmictic across sampling locations by comparing the nucleotide sequences of the mitochondrial COI gene. The occurrence of B. rectangulata was rare in this study (n=1 from Shibetsu only) and therefore excluded from the analysis. Our analyses revealed no genetic differences among the three sampled populations of C. perfida and H. diceraus. We conclude that these latter two parasitic copepods are widely distributed in the North Pacific and represent panmictic populations.
著者
西川 潮 東 典子 佐々木 進一 岡 智春 井上 幹生
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.26, pp.5-11, 2017-08-01 (Released:2017-09-30)
参考文献数
22

On 9 November 2016, an unknown Cambaridae crayfish was collected from the outflow stream of Matsubara Izumi along the Shigenobu River in western Japan. On the basis of COI and 12S rRNA analyses, we identified the crayfish as the Marmorkrebs (Procambarus fallax f. virginalis), which serves as the first record for this species from western Japan. The Marmorkrebs is widely available across Japan through the aquarium pet trade. Because the parthenogenic Marmorkrebs has high potential to impact biodiversity, fisheries, and rice farming in Japan through rapid proliferation, transmission of diseases, and herbivory, we call for urgent management plans to restrict the import, movement, and release of this crayfish.
著者
諸喜田 茂充 田内 裕之
出版者
日本甲殻類学会
雑誌
Cancer : 会員連絡誌 (ISSN:09181989)
巻号頁・発行日
no.5, pp.7-9, 1996-05-01
被引用文献数
4
著者
Adam Powell Daniel M. Cowing Susanne P. Eriksson Magnus L. Johnson
出版者
日本甲殻類学会
雑誌
Crustacean Research (ISSN:02873478)
巻号頁・発行日
vol.46, pp.17-24, 2017 (Released:2017-01-18)
参考文献数
16

The Norway lobster, Nephrops norvegicus, is a valuable and commonly exported European decapod crustacean, which experiences stress from point of capture and onward transport. Stressors such as air exposure duration (i.e. emersion period) and air temperature have been studied previously. We investigated whether mortality could be reduced by decreasing road vibrations during transport, and how physiological stress measurements were influenced in a transport simulation experiment, reflecting a typical short road journey along a supply chain. Baseline haemolymph samples were taken from lobsters sampled immediately after commercial capture using static traps (lobster pots). Individuals were emersed for one hour, either immobile or with continuous shaking; the latter to simulate conditions occurring during transport. Both treatments significantly increased Total Haemocyte Counts (THC) and serum glucose, lactate and ammonium concentrations compared to baseline animals. Individuals subjected to continuous shaking showed higher glucose and ammonium concentrations compared to individuals maintained immobile. We conclude that shaking appears to influence the physiological responses of N. norvegicus in addition to the effects of emersion alone, and the reduction of road vibrations (e.g. via simple cushioning) can reduce post-transport mortality.
著者
小西 光一
出版者
日本甲殻類学会
雑誌
Cancer : 会員連絡誌 (ISSN:09181989)
巻号頁・発行日
no.5, pp.15-21, 1996-05-01
被引用文献数
2
著者
小西 光一
出版者
日本甲殻類学会
雑誌
Cancer : 会員連絡誌 (ISSN:09181989)
巻号頁・発行日
no.19, pp.31-38, 2010-05-01
著者
一寸木 肇
出版者
日本甲殻類学会
雑誌
甲殻類の研究 (ISSN:02873478)
巻号頁・発行日
no.7, pp.177-182a, 1976-02
被引用文献数
1

日本のサワガニ属GeothelphusaなかでサワガニGeothelphusa dehaani(WHITE)の体色変異を神奈川県を中心に茨城県,千葉県,東京都,静岡県,山梨県,愛知県の各県にわたり調べ,次のような結果が得られた。サワガニの体色変異を調べたところ8型にわけることができ,それらの個体はBL型,RE型,DA型の3系統にまとめることができる。そしてそれぞれ一定の広がりをもって分布するように思われる。すなわち1)BL型地域(千葉県房総半島,神奈川県南部,静岡県東南部),2)RE型地域(静岡県西部,愛知県東部),3)DA型地域(茨城県中部,東京都西部,神奈川県北部・静岡県北東部・山梨県南部・長野県南部),4)BL・DA型混棲地域(神奈川県中部),5)RE・DA型混棲地域(静岡県北西部)の5つの地域にわけられる。
著者
今田 和則 平山 明 野島 哲 菊池 泰二
出版者
日本甲殻類学会
雑誌
甲殻類の研究 (ISSN:02873478)
巻号頁・発行日
no.11, pp.124-137, 1981-12

The ecological distribution of phytal amphipods on seaweeds were investigated in a Sargassum bed at the coast of Tomioka Peninsula, Amakusa, Kyushu. Eight plants of 4 Sargassum species were collected underwater by the vertically stratified sampling method in May when these seaweeds fuliy grown up. By this sampling, 10 species of caprellids and 21 species of gammarids were obtained. The similarities among epiphytic amphipod assemblages of each host plant were analyzed for Caprellidae and Gammaridea respectively. These assemblages resembled each other, consequently it was speculated that these epiphytic amphipods generally have no specific preference to the host plants. Simultaneously, two groups were recognized in both taxa, namely, one group consists of S, patens and S. horneri which were collected in the outer part of the Sargassum bed, another is S. thunbergii and S. hemiphyllum which mainly flourish inside. The difference seemed to be caused by the factors which related with wave action or other hydrodynamic conditions. In the vertical distribution of the biomass of each alga, the weight of higher part was normally heavier than that of lower part, and this tendency was also observed in the individual number of amphipods on each part. Vertical distribution of 6 species of amphipods (Caprella decipiens, C. danilevskii, C. tsugarensis, Ampithoe orientalis, Aoroides columbiae, Pontogeneia rostrata) showed high positive correlations with those of seaweeds biomass. Exclusive of S. horneri, C. monoceros and Phliantidae sp. 1 also showed positive correlations with the vertical distribution of seaweed biomass like other species. On S. horneri, however, they mainly occurred on the lower part of seaweed and showed negative correlation.