• Title/Summary/Keyword: Zoeal development

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애기털보부채게(갑각강, 단미목, Pilumnidae)의 zoea 유생 (The Zoeal Stages of Pilumnus minutus De Haan, 1835 (Decapoda ; Brachyura: Pilumnidae) in the laboratory)

  • Hyun Sook Ko
    • Animal Systematics, Evolution and Diversity
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    • 제10권2호
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    • pp.145-155
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    • 1994
  • 실험실에서 사육된 애기털보부채게의 유생은 4 zoea 유생기를 가졌고, zoea 유생기를 완료하는데 25$^{\circ}C$ 수온에서 최저 15일이 걸렸다. 각 zoea 유생기의 형태적 특징을 상세히 기록, 도시하고 Pilumnidae과의 이미 보고된 다른종의 제 1 zoea유생과 그 특징을 비교하였다. 애기털보부채게는 구부부속지나 갑각극의 형태적 특징에서 Pilumnus 속의 다른 종들과 차이가 없었으나 복부측돌기는 복부 제 2, 3, 4, 5절에 존재하므로 Pilumnus 속의 다른 종들과 형태적 차이를 보이고, 이 특징은 세가지 부채게에서 볼수 있는 복부의 형태적 특징으로 두종간에 어떤 유연관계가 있는 것 같다.

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Zoeal Development of Telmessus acutidens (Crustacea: Decapoda: Brachyura: Atelecyclidae) Reared in the Laboratory

  • Ko, Hyun-Sook
    • Animal Systematics, Evolution and Diversity
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    • 제22권2호
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    • pp.127-138
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    • 2006
  • An ovigerous hair crab, Telmessus acutidens, was collected in South Korean waters and its larvae were reared in the laboratory. The larval development consists of four zoeal (including an extra zoeal stage) and one megalopal stages. Four zoeal stages are described and illustrated in detail. The zoeas of the present material show some differences from Kurata (1963)'s plankton-collected zoea of T. acutidens in the characteristics of the carapace spines, an endopod and an exopod of the antenna, and the posterolateral process of the abdominal somite. Kurata's zoea agreed well with that of T. cheiragonus. So, it is suggested that Kurata's zoea may be the second zoea of T. cheiragonus.

PAGURUS LANUGINOSUS DE HAAN의 유생 발생에 관한 연구 (The Larval Development of Pagurus lanuginosus do Haan(Crustacea, Anomura) Reared in the Laboratory)

  • 홍성윤
    • 한국수산과학회지
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    • 제2권1호
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    • pp.1-15
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    • 1969
  • Pagurus lanuginosus do Haan의 유생을 실험실에서 사육하며 glaucothoe기까지의 발생을 관찰 연구하였다. 1) P. lanuginosus는 4기의 Zoea기와 1기의 glaucothoe기의 유생기를 가졌다. 2) 평균 수온 $13.6^{\circ}C$와 평균 염분농도 $33.67\%_{\circ}$의 사육조건에서 알에서 부화한 zoea유생은 31-32일 후에 glaucothoe 유생으로 변태 발생했다, 3) 각 zoea기의 평균기간은 7-9일이었다. 4) zoea 유생의 가장 독특한 형태적 특징의 하나로 미선(telson)의 말만에 3쌍의 들기(1쌍의 털과 6쌍의 침)를 가지며 그 돌기의 수와 모양은 전 zoea기 동안에 변함이 없다. 5) zoea 유생의 제2 촉각의 외지의 내변에는 5개의 우상모가 나 있다. 6) glaucothoe 유생의 telson 말단에는 3쌍의 우상모가 나 있다. 7) glaucothoe 유생은 안병극을 갖지 않는다.

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갯가게붙이(Petrolisthes japonicus)의 유생발생 (The Larval Development of Petrolisthes japonicus (De Haan,1849) (Decapoda, Porcellanidae) in Laboratorv Culture)

  • 이화자
    • 한국동물학회지
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    • 제36권1호
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    • pp.67-76
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    • 1993
  • The lanral characters of Petrolisthes japonicus (De Haan, 1849), Porcellanidae, were described and illustrated. The lanral development of P. juponicus includes the two zoeal and one megalopal stases. The first and second zoeal stases lasted about 4 and 10 days, respectively. It took about 14 days to attain megalopa from hatching-The larval characteristics of P. japonicus were compared with those of other knouts species of Petrolisthes. Consequently, the lanrae of P. japonicus are more closely related to P elongatus and P ornutus than other Petrolisthes species, but the present species can be distinguished from these Petrolisthes species by morphological characteristics.

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인천 북서부 해역에서 출현하는 갯가재 유생의 발달과 분포 (Development and Distribution of the Japanese Mantis Shrimp Oratosquilla oratoria Larvae in the Northwestern Water off Incheon)

  • 연인자;박원규
    • 수산해양교육연구
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    • 제23권4호
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    • pp.763-771
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    • 2011
  • Development and distribution of Japanese mantis shrimp, Oratosquilla oratoria (De Haan) larvae were investigated in the northwestern water off Incheon. O. oratoria larvae were monthly collected at 15 stations from early June to early October in 2007. Bongo net with 330 and 505 um mesh was deployed in a double once with an oblique tow way. Larval densities were relatively higher in southerner stations in July and in northerner stations in August and September. No larvae were discovered in June. Zoea I and II were not captured during the entire sampling period. Zoea III occurred in July for the first time and were found until September. Thereafter, the proportion of later stages increased. The number of zoeal stages decreased during the summer months and no larvae were found in October. Of zoeal stages, zoea IV was the most abundant in number. Zoeal densities were highest in July and August, particularly at the stations near the coast. O. oratoria larvae may be retained and grow within our study sites without advection to growing areas. Non-occurrence of zoea I and II indicate that they were retained near spawning grounds or near parental burrows. Pattern of larval occurrence was coincided with previous researches conducted in conspecific distribution ranges.

Zoeal Stages of Leptomithrax edwardsii (Crustacea: Decapoda: Majidae) Described from Laboratory Reared Material

  • Kang, Jung-Ha;Lee, Yong-Seok;Jeong, Ji-Eun;Ko, Hyun-Sook
    • Animal Systematics, Evolution and Diversity
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    • 제28권3호
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    • pp.185-191
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    • 2012
  • Zoeas of Leptomithrax edwardsii were reared in the laboratory. Two zoeal stages are described and illustrated. The first zoeal stage of L. edwardsii is compared with those of seven known species of the family Majidae. It differs from previous description in the endopodal setation characters of the maxillule and the second maxilliped. It appears most similar to L. bifidus and Schizophroida simodaensis of the northwestern Pacific. A provisional key for identifying eight majid zoeas is included.

Complete larval development of Pyromaia tuberculata (Crustacea: Decapoda: Majoidea: Inachoididae)

  • Oh, Seong-Mi;Ko, Hyun-Sook
    • Animal cells and systems
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    • 제14권2호
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    • pp.129-136
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    • 2010
  • The introduced spider crab Pyromaia tuberculata was collected from Korea in 2005 and it was ovigerous. After hatching, larvae were reared in the laboratory at $20^{\circ}C$. The larval stage of the species consists of two zoeal and one megalopal stages. The larvae of the Korean species differ somewhat from those from New Zealand described by Webber and Wear (1981; N Z J Mar Freshwat Res. 15:331-383) and from Brazil described by Fransozo and Negreiros-Fransozo (1997; Crustaceana. 70:304-323.) in the setal presence of the antennule, the maxillule, the maxilla and the maxillipeds, and the abdomen. It is found that Fransozo and Negreiros-Fransozo have overlooked some setae on the basis of the zoeal maxillipeds and that re-examination of their larvae is needed. Also, it is found that the Inachoididae is heterogeneous based on the zoeal morphology because two distinct groups exist in the family.

Larval development of Scyra acutifrons (Crustacea: Decapoda: Epialtidae) with a key from the northern Pacific

  • Oh, Seong-Mi;Ko, Hyun-Sook
    • Animal cells and systems
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    • 제14권4호
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    • pp.333-341
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    • 2010
  • The larvae of Scyra acutifrons are described and illustrated for the first time. The larval stage consists of two zoeal and a megalopal stages. The zoea of S. acutifrons is compared with those of other known species of the Epialtidae from the northern Pacific. The zoea of Scyra acutifrons can be easily distinguished from that of S. compressipes by having a longer rostral carapace spine and an endopod of maxillule with three setae. It is found that the genus Scyra (Pisinae) shows a great similarity to Pisoides bidentatus (Pisinae) and the genus Pugettia (Epialtinae) in the family Epialtidae; especially, S. acutidens coincides well with two Pugettia species (Pugettia incisa and P. gracilis) in the characteristics of the zoeal mouthpart appendages. To facilitate the study of plankton-collected material, a provisional key to the known zoeae of the Epialtidae from the northern Pacific is provided.

Aipheus euphrosyne (새우아목, 딱총새우과)의 Zoea 유생 (Zoeal Stages of Aipheus euphrosyne richardsoni Yaldwyne, 1971 (Decapoda: Macrura: Alpheidae) Reared in the Laboratory)

  • 양회정;김창현
    • 한국동물학회지
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    • 제39권1호
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    • pp.106-114
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    • 1996
  • 실험실에서 사육된 Alpheus euplirosyne rlchardsoni의 zoea 유생을 기재 및 도시하였다. 사유은 수온 25$^{\circ}$C, 염분농도 33.3$\textperthousand$, 광주기 l4hr light: lOhr dark의 조건하에서 진행되었다. A. euplirosyne rlchardsoni는 부화직전의 난의크기와 제1기 zoea유생의 길이에서 장기발생(extended development)을 보였다. 딱총새우속에 속하는 6종의 제1기 zoea유생의 형태적인 특징에 대하여 논의하였다.

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