著者
福家 悠介 岩﨑 朝生 笹塚 諒 山本 佑治
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.30, pp.63-71, 2021-08-01 (Released:2021-08-26)
参考文献数
54

Neocaridina denticulata (Decapoda: Atyidae) is a freshwater shrimp with a land-locked life-history and is widely distributed in western Japan. The taxonomic confusion of this species, caused by the loss of type specimens, unknown type locality, and genetic and morphological geographical variation, has led to inconveniences in biodiversity conservation and the identification of exotic species that recently invaded Japan. Therefore, it is important to clarify this species’ distributional range and regional genetic and morphological characteristics to solve the problem. Here we report the first record of N. denticulata from Fukue-jima Island in the Goto Islands, Nagasaki Prefecture, Japan. Morphological analyses identified the population as N. denticulata, and mitochondrial DNA-based analyses suggested that the population was distinctly differentiated from the Kyushu populations. This population is essential for inferring the N. denticulata distribution formation and biota formation processes in the Goto Islands. On Fukue-jima Island, N. denti­culata has only been found in one pond; thus, the Fukue-jima population is likely to be in critical condition.
著者
林 紀男
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.27, pp.143-147, 2018-08-01 (Released:2018-08-31)
参考文献数
9
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
3

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
中島 広喜 成瀬 貫
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.29, pp.59-63, 2020-08-01 (Released:2020-09-09)
参考文献数
10

A mantis shrimp species of the family Nannosquillidae, Pullosquilla pardus (Moosa, 1991), is reported from the Ogasawara and Ryukyu Islands. This report represents the first record of P. pardus from the Japanese waters. The record from Anijima, Ogasawara Islands, expands the distributional range of the species to the north.
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
福家 悠介
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.29, pp.25-27, 2020-08-01 (Released:2020-09-09)
参考文献数
10

Tachaea chinensis (Isopoda: Corallanidae) is an ectoparasitic isopod that is sporadically reported from East Asia. Freshwater prawns and shrimps are characteristic hosts. Two specimens of unidentified crustacean collected at Lake Kasumigaura in 1915 were identified as T. chinensis. The specimens were originally kept at the Center for Ecological Research, Kyoto University and are now maintained at the Kyoto University Museum. To the best of my knowledge, these two specimens represent the oldest example of T. chinensis in Japan. The specimens are assumed to have been collected by N. Annandale. Other specimens collected at the same time were entrusted to W.M. Tattersall and reported in 1921. The specimens, collected over 100 years ago, are important in understanding biodiversity and environmental changes.
著者
木戸 結菜 伊與 田朋未 石原(安田) 千晶 和田 哲
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.28, pp.7-15, 2019-08-01 (Released:2019-09-03)
参考文献数
37

This paper described female guarding avoidance behaviors against precopulatory guarding attempts by males and examines the effect of the number of days until female prenuptial molting on rejection behaviors in the hermit crab Pagurus nigrofascia. We used three types of females in an experiment; (1) ovigerous females (OV–female), (2) females which had not been guarded in the field (NG–female), and (3) females which had been guarded by other males in the field (G–female). We placed a male that had been solitary and a female of either type in a small container, observed the interaction, and compared the female behaviors among the three types of female. The frequencies of retreat and escape from approaching male were highest in OV–females, and lowest in G–females. During male assessment behaviors of females, frequencies of struggle and escape in OV– and G–females were higher than NG–females. 33 of 51 G–females were guarded by males although OV– and NG–females were rarely guarded by males. Many G–females showed rejection behavior during male guarding. However, no significant effect was found in the number of days until the female prenuptial molt on the frequencies of rejection behavior.
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
松尾 美好
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.8, pp.3-11, 1999-05-01 (Released:2017-07-05)
参考文献数
31
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
笹塚 諒 浜崎 活幸 團 重樹
出版者
日本甲殻類学会
雑誌
CANCER (ISSN:09181989)
巻号頁・発行日
vol.28, pp.e105-e107, 2019-08-01 (Released:2019-09-03)
参考文献数
3