• 제목/요약/키워드: Amphipod

검색결과 78건 처리시간 0.028초

서부 북태평양에 있어서의 부유성 단각류 Cyphocaris challengeri 의 분포에 관하여 (On the Distribution of the Pelagic Amphipod, Cyphocaris challengeri (Gammaridea: Lysianassidae) in the Western North Pacific)

  • Yoo, Kwang-Il
    • 한국동물학회지
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    • 제13권3호
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    • pp.94-100
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    • 1970
  • C. challengeri는 아한대수의 전형적인 부유성 단각류로써 서부 북태평양의 $40^\\circ N$ 이북인 오야시오 수역에 널리 분포하고 있으며, 이 해역의 중심층 동물플랭크톤 생물량의 큰 비중을 차지하고있다. 본종은 구로시오 본류 이남이나 북태평양 중앙 수역에 가끔 출형하여 그 분포의 남한이 재검토 되었다. 한편 본종의 수직분포와 생물량의 일주수직이동도 아울러 검토되어 35-1,750m 사이에 서시하고, 주간에는 180-280m, 야간에는 35-100m에서 성군을 함을 알았다. 또 250m의 범위를 수직이동하여 상부의 유기물질을 심부로 수송하는 역할을 맡고 있다. 본종의 남하는 아한대중층수의 이동에 따르며 분포의 환경요인은 수온 $(10^\\circ C 이하)$과 염분도 (30 \ulcorner 이하)임을 밝혔다.

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First Record of a Hyalid Species, Protohyale pumila (Crustacea: Amphipoda: Hyalidae), from Korea

  • Shin, Myung-Hwa;Kim, Won
    • Animal Systematics, Evolution and Diversity
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    • 제28권4호
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    • pp.312-316
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    • 2012
  • A hyalid amphipod, Protohyale pumila (Hiwatari and Kajihara, 1981), collected from Jeju Island is reported for the first time in the Korean fauna. The species is characterized by the presence of a short apical spine on the palp article 4 of maxilliped, a distinctly large and blunt cusp on the propodus of male gnathopod 1, and a distal truncate process on the palm of male gnathopod 2. Herein, the present species is described and illustrated. Korean hyalid amphipods now are composed of four species belonging to three genera. Voucher specimens were deposited in the Marine Arthropod Depository Bank of Korea, Seoul National University.

Precopulatory Mate Guarding, Mating System and Pairing Parental Care in Hyale rubra (Peracarida; Amphipoda; Gammaridae)

  • Kim, Sung-Han
    • Journal of Ecology and Environment
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    • 제31권1호
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    • pp.17-21
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    • 2008
  • Mating behaviour of the gammarid amphipod, Hyale rubra, was observed. H. rubra displayed precopulatory mate guarding: males clasped females with their gnathopods during copulation, forming a pair. Males also participated in embryo care during the incubation period. The population was small, and the sex ratio was almost equal. Energy allocation for mating effort and parental effort in the two sexes appear to be almost equal. The mating system was sequentially polygamous (or promiscuous) and there was conspicuous sexual dimorphism in the size of the gnathopod, which was used for mate guarding. However, there appears to be relatively weak sexual competition for mating opportunities despite conspicuous sexual dimorphism. H. rubra did not display territorial competition or external fertilization. Nevertheless, the male provided paternal care. Since H. rubra inhabit tide pools and live on algae, the polygamous mating system of the species can be explained by the polygyny threshold model. The evolution of mate guarding and parental care may have been favored by the species' low population density and harsh environments, an interpretation consistent with the optimality model.

울릉도 해역의 단각류(갑각류) III (The Marine Amphipod Crustaceans of Ulreung Island, Korea: Part III)

  • Kim, Won;Min, Gi-Shik
    • 한국동물학회지
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    • 제34권3호
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    • pp.323-337
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    • 1991
  • This study on the four families (Leucothoidae, Melitidae, Pleustidae, and Stenothoidae) of gammaridean and the one family (Caprellidae) of caprellidean amphipods of Ulreung Island was based on the materials collected at eight localities in Ulreung Island. Ten species of six genera were identified. Of these, he (Elasmopus korrunus, and Muero breuispina) are new to science. Four species (Leucothoe nogotoi, 1. spinicawa, Paropleustes denhouini, and Stenothoe volido) are new records for Korean craters. Five species were described and six Lvere illustrated.

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울릉도 해역의 단각류(갑각류) (The Marine Amphipod Crustaceans of Ulreung Island, Korea: Part I)

  • 김원;김창배
    • 한국동물학회지
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    • 제34권2호
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    • pp.232-252
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    • 1991
  • 울릉도의 해양 단각류상을 조사하기 위하여 조사기간인 1989년 7월부터 1990년 8월 사이에 울릉도 해안의 8개 지소에서 채집한 단각류 표본들 중에서 Ampithoidae, Corophiidae, Dulichlldae, lschyroceridae등 4과에 속하는 것들을 동정한 결과 9속, 11종의 목록이 얻어졌다. 이 중에서 4종(Sunamphithoe sineplumosa, Podocerus ulreungensis, P. hoonsool, and Ventojassa dentipalma)은 신종이었고, 보고되는 11종 모두가 울릉도에서 처음 기록되는 것들이었다. 6종을 기재하고 그림을 작성하였다. 모든 종과 상위 분류군들에 대한 검색표들을 제시하였다.

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韓國 南海岸 得粮灣에서 실시한 附着板實驗에서 大量發生했던 管棲 端脚類 三種의 分類 및 生態學的 硏究 (Three Tube-Building Amphipods from Experimental Plates in Deukryang Bay in the Southern Coast of Korea)

  • Hong, Jai-Sang
    • 한국동물학회지
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    • 제26권2호
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    • pp.135-153
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    • 1983
  • 汚損生物 (fouling organisms)을 조사하기 위하여 1981년 1월부터 7월까지 한국 남해안에 위치하고 있는 得粮灣에서 附着板實驗을 실시한 결과 底棲性端脚類가 優占動物群으로 나타났다. 그 중에서도 다음의 옆새우類 三種 (Jassa falcata, Corophium acherusicum, Ericthonius brasiliensis)은 부착판의 全 表面에 silty tubes를 형성하면서 附着生物의 群集 形成 초기단계가 괄목할만한 量的 增殖이 관찰되었는데 이들 3種의 형태적 특징과 生態에 관하여 기재하였다.

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A New Record of the Genus Anonyx (Crustacea: Amphipoda: Uristidae) from Korean Waters

  • Heo, Jun-Haeng;Kim, Young-Hyo
    • Animal Systematics, Evolution and Diversity
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    • 제34권2호
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    • pp.119-125
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    • 2018
  • A newly recorded species of lysianassid amphipod, Anonyx schefferi Steele, 1986 which belongs to the family Uristidae Hurley, 1963 was collected from the East Sea of Korea. The genus Anonyx Krøyer, 1838 was subdivided into five groups mainly based on the amount of constriction of the inner ramus of uropod 2: A. bispinosus group, A. compactus group, A. laticoxae group, A. nugax group, A. validus group. Anonyx schefferi is included in one of the A. laticoxae group. This species is similar to Anonyx laticoxae Gurjanova, 1962, but A. schefferi is characterized by an unconstricted inner ramus of uropod 2 and an upturned epimeron 3 posteroventrally. The species is described and fully illustrated in the present study.

First Record of the Brackish Water Amphipod Jesogammarus (Jesogammarus) hinumensis (Amphipoda: Anisogammaridae) from Korea with DNA Barcode Analysis among Jesogammarus Species

  • Lee, Chi-Woo;Tomikawa, Ko;Min, Gi-Sik
    • Animal Systematics, Evolution and Diversity
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    • 제35권3호
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    • pp.151-155
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    • 2019
  • Jesogammarus (Jesogammarus) hinumensis Morino, 1993 was discovered firstly from a brackish water region in Jeju Island, Korea. To identification of the specimens we conducted both of morphological and molecular analyses. This species is characterized by having large eyes and a robust seta on the mandibular palp article 1. The morphology of this Korean specimens was well matched with the original description without variation. The mitochondrial cytochrome c oxidase subunit I(COI) sequences of the present specimens were also completely identical to the sequences of J. (J.) hinumensis collected from the type locality of the species. Thus, we concluded that the Jesogammarus species from Jeju Island is J.(J.) hinumensis, based on both morphological and molecular data.

Two new record of the genus Anonyx (Crustacea: Amphipoda: Uristidae) from Korean waters

  • Heo, Jun-Haeng;Kim, Young-Hyo
    • Journal of Species Research
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    • 제10권3호
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    • pp.267-275
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    • 2021
  • Two newly recorded carnivorous amphipod species, Anonyx gurjanovai Steele, 1986 and A. nugax (Phipps, 1774) belonging to the family Uristidae Hurley, 1963, were collected from the East Sea, Korea. Anonyx gurjanovai is included in the A. laticoxae group and is characterized by a concave palm of the propodus in gnathopod 1 and small posteroventral projection at epimeron 3. The other species, A. nugax, represents the A. nugax group and is distinguished from congeneric species based on the presence of a shorter and less acute projection on epimeron 3. There are 13 species of the A. nugax group recorded worldwide, but this is the first report on the presence of the A. nugax group in Korean waters. Previously, three species of the genus Anonyx had been reported in Korea, and through this study, we have added two newly recorded species. Both the newly recorded Anonyx species are illustrated and compared with the related species. A key to the Anonyx species in Korea is also provided.