• Animal Systematics, Evolution and Diversity
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• 제32권2호
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• pp.133-140
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• 2016

The first zoeas of Parapanope euagora and Halimede fragifer hatched in the laboratory from two ovigerous galenid crabs of Pilumnoidea were collected from Jindo Island, Jeolanam-do, southern Korea. Their morphologies are described in P. euagora for the first time in the world and re-described in H. fragifer with the color images of live zoeas. In this study, they show a general morphology of Pilumnoidea by having a long antennal exopod, an endopod of the maxillule with 1, 2+4 setae, an endopod of the maxilla with 3+5 setae, and a fork of the telson with two lateral armatures. However, the first zoea of P. euagora differs from other known zoeas of pilumnoid species including H. fragifer by having a long antennal exopod with a medial seta and spine, not two spines, and a fork of telson with two lateral setae, not a seta and spine. Such characteristics of the antennal exopod and the fork of telson are reported for the first time in the pilumnoid zoeas. A comparison between the first zoeal stage of H. fragifer in this study and that of Terada shows minute differences in the characteristics of the antennule and the fork of telson.

• 생명과학회지
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• 제12권4호
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• pp.407-415
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• 2002

동남참게 초기유생에 대한 다양한 먹이를 공급하여 먹이에 따른 어린게까지 소요 일수와 생존율을 수온 22$\pm$1$^{\circ}C$ 및 염분 24$\pm$1% 상태에서 조사한 결과는 다음과 같다. 무투여구에서는 5일만에 조에아 I~2기 상태에서 모두 사멸하였고, 살아있지 않은 먹이인 삶은 계란 난황 건조분말, 삶은 대두 건조분말, 인공배합사료 분말, 삶은 수수 건조분말, 새우 생육세편, 담치 외투막 생육세편를 공급한 실험구에세는 7~9일 까지 생존하였으며 유생의 형태는 조에아 2~3기 상태였다. 식물성 단세포인 C. ellipsoid, S. costatum, 및 C. gracilis를 각각 단독으로 공급하였을 때 각각 10, 18과 19일 까지 생존하였고, 유생의 형태는 조에아 3~5기 상태였고, 동물성 플랑크톤인 Artemia nauplii and rotifer를 공급하였을 때 각각 24일과 25일만에 치게로 변태하였고 이때의 생존율은 각각 43%와 25%이었다. 한편, 조류와 동물성 먹이를 혼합하여 공급하였을 때 단독공급시보다 모든 실험구에서 생존율이 높게 나타났고, 치게까지 도달하였다. 그 중에서 가장 효과가 좋았던 실험구는 규조류인 C. gracilis, Artemia nauplii and rotifer를 혼합공급한 실험구 이었고, 22일만에 치게로 변태하였으며 이때 생존율은 73%였다.

• 한국동물학회지
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• 제33권4호
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• pp.411-427
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• 1990

실험실에서 사육된 동남참게(참게아과) 전체 유생기의 형태적인 특징을 상세히 기술하고 도시하였다. 동남참게는 5 zoea기를 거쳐 megalopa기로 탈피하였다. 수온 $25^{\circ}C$, 염분 농노 33.3$\textperthousand$, 광주기 14 h light:10 h dark의 조건하에서 실험이 진행되었다. 부화로부터 megalopa기와 제1 carb기 까지는 각각 17일과 27일이 걸렸다. 각 유생기이 형태적인 특징들이 이미 기재된 일본산 동남참게의 유행 특징들과 비교되었으며, 참게아과 내의 Zoea I기의 형태적 특징에 관한여 간단히 논의하였다.

• Animal Systematics, Evolution and Diversity
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• 제15권1호
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• pp.51-65
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• 1999

털부채게의 제 1 조에아 유생에서 메갈로파 유생기까지, 실험실내 25$^{\circ}C$에서 와전 유생발생시키고 4기의 조에아 유생과 1기의 메갈로파 유생에 대해 상세히 기재하고 도시하였다. 털부채게의 조에아 유생은 제 1 촉각과 미절의 특징에 의해 Actaeinae아과의 다른 조에아 유생들과 구별할 수 있었다.

• 한국동물학회지
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• 제37권3호
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• pp.331-342
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• 1994

The larval development of Parupilumnus trispinosus Sakai, 1965 completed in the laboratory consisted of four zoeal stages and one megalopal stage. Completion of the lanral development required at least 18 days at 20-25"C. The morphology of the lanrae of each stage is described in detail, and comparisons are made with larvae of other 11 species of the subfamily Pilumninae. Although, the zoeae of the subfamily Pilumninae show almost consistent characteristics of the mouthpart appendages, in the characteristics of the carapace spines and the abdominal lateral knobs they can be divided into five groups: (1) the genera Heteropanope and Heteropilumnus, (2) the genera Actumnus and Pilumnus, (3) Pilumnopeus makiona and P sewutifrons, (4) Porupilumnus trispinosus, and (5) Pilumnopeus eucratoides and. p indic${\alpha}$.

• Animal cells and systems
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• 제10권1호
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• pp.7-14
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• 2006

Novactaea pulchella was reared in the laboratory, from hatching to the megalopal stage at $25^{\circ}C$. The larval stage of it consists of two zoeal and one megalopal stages. The first zoea of the present study differs from that described by Terada (1990) in the setal presence of the carapace, the maxilla and the maxilliped, and the lateral process on the abdominal somite. It is reported for the first time that brachyuran zoeas belonging to a species share two types of lateral processes on the abdominal somites. They are either on the abdominal somites 2 and 3 or on abdominal somites 2 to 5. A provisional key is provided to aid the identification of the actaeine zoeas in Korea and the adjacent waters.

• Animal cells and systems
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• 제12권4호
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• pp.287-295
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• 2008

Variations of larval abundance and hatch timing of Dungeness crabs, Cancer magister Dana 1852, were investigated. Dungeness crab larvae were monthly collected at 16 stations arrayed in four transects, Upper Chatham, Icy Strait, Cross Sound, and Icy Point, in southeastern Alaska from May to September 1997-2004. Larval abundance at all transects was the highest in June except in the Icy Point transect. Larval abundance was the highest in the Icy Strait transect, moderate in the Upper Chatham and Cross Sound transects, and the lowest in the Icy Point transect. Zoeae I(ZI) was predominated in May; thereafter ZI decreased and late zoeal stages occurred. In May and June, small numbers of late stage larvae unusually co-occurred with ZI in three transects. These late stage larvae may have been transported from where hatching occurs earlier. The timing of ZI occurrence varied interannually and was related to degreedays during the egg incubation period of Dungeness crabs: later larval hatching in 1997 and 2002 when temperatures were colder, while earlier larval hatching in 1998 when temperatures were warmer. The distribution patterns of Dungeness crab larvae in southeastern Alaska were markedly different from those reported from other areas of the species distribution ranges: larvae occurring much later in the year, and late stage larvae occurring in inland waters.

• Animal Systematics, Evolution and Diversity
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• 제18권1호
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• pp.1-12
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• 2002

옴부채게를 제 1 조에아 유생에서 제 1 어린 게시기까지, 실험실내 $25^{\circ}C$에서 발생시키고 제 1기와 2기 조에아 유생에 대해 상세히 기재 및 도시하였다. 본 연구에서 옴부채게의 제 1조에아 유생은 갑각, 제 1촉각 제 1악지의 저절, 제 1복부절에 강모들이 존재함으로 Terada (1987)의 연구와 약간의 차이를 보였다. 옴부채게의 조에아 유생은 제 1촉각 외지가 한 개의 강모이거나 혹은 흔적적인 상태에서 한 개의 강모를 가지고 있어 다른 부채게과 조에아 유생들과 분명하게 식별되었다. 그리고 한국근해의 부채게과 종에 대한 조에아 유생검색표가 제공되었다.

• The Korean Journal of Ecology
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• 제13권1호
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• pp.19-24
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• 1990

The effects of insect growth regulator Dimilin which interfere with the synthesis of chitin in the cuticle of insect larvae were investigated at various concentrations using the crab larvae of Hemigrapsus sanguineus. The larvae were cultured at control, 0.5, 1, 5 and 10 $\mu g$ Dimilin solutions and three replicate experiments were carried out to give correct analysis. Significant differences in percent mortality have occurred between control and 10$\mu g$ when the larvae were exposed to Dimilin whereas no differences were found between 5 and 10$\mu g$ Dimilin concentrations. If lethal concentration is defined as concentration at which less than 10 percent of crab larvae reach to the last zoeal stage from hatching it can be concluded that insect growth regulator Dimilin is lethal to the larvae of Hemigrapsus sanguineus at 5 and 10$\mu g$ Dimilin.

• Animal Systematics, Evolution and Diversity
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• 제30권4호
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• pp.235-239
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• 2014

The first zoea of Camptandrium sexdentatum is described for the first time with a digital image of live zoeas. An ovigerous crab of C. sexdentatum was collected at the muddy sand flat in Namhaedo Island on 2 June 2012 and hatched in the laboratory on 6 June 2012. In Camptandriidae, the first zoea of C. sexdentatum is distinguished from the first zoeas of Cleistostoma dilatatum and Deiratonotus cristatum by having no dorsal and lateral carapace spines, an abdomen significantly broadened posteriorly, and a subovoid telson without forks. Especially, the finding of a subovoid telson without forks is the first report in brachyuran zoeas.