• Title/Summary/Keyword: Uca arcuata

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Complete Larval Development of Uca Arcuata(Crustacea, Brachyura, Ocypodidae) Reared in the Laboratory (농게(갑각강, 게아목, 달랑게과) 의 유생발생)

  • 고현숙;김창현
    • Animal Systematics, Evolution and Diversity
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    • v.5 no.2
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    • pp.89-105
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    • 1989
  • 농게(Ura arcuata) (달랑게과, 달랑게아과) 의 유생을 부화에서부터 첫 번째 게기까지 수온 $25^{\circ}C$ , 염분농도 33.3$\textperthousand$의 해수에서 사육하고, 각 유생기이 형태적인 특징을 기술 및 도식하였다. 이 종은 5기의 zoea와 1기의 megalopa 유생을 거쳐 첫 번째 게기로 변태하였다. 제 1 zoea 유생기는 제 1 소악의 내지에 4개의 말단강모와 제 2 악각의 기절과 내지에 각각 3개의 우상강모와 0, 0, 5 강모식을 가지고 촉각은 B형이었다. 이러한 특징들은 이미 보고된 같은 과의 유생들의 특징들과 잘 일치하고 있다.

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Fatty Acids as Tracer of Trophic Relationships in a Subtropical Mangrove Wetland

  • Shin, P.K.S.;Chan, A.K.Y.;Lam, M.H.W.
    • The Korean Journal of Ecology
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    • v.27 no.2
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    • pp.61-65
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    • 2004
  • To elucidate the trophic relationships within a subtropical wetland, the profile of fatty acids in producers, consumers and sediments of the mangrove forest and intertidal mudflat was studied. Results indicated a close relationship in fatty acid profiles between the mangrove plants Aegiceras corniculatum and Avicennia marina and the sesarmid crab Sesarma bidens, and between the fiddler crab Uca arcuata and diatoms. The fatty acid profile of the mudskippers Boleophthalmus pectinirostris and Periophthalmus cantonensis, however, showed a mixed diet of diatoms, macroalgae, protozoa and crabs. Seasonal changes in fatty acid profiles in mangrove plants, sediments and sesarmid crabs were noted. The implication of using fatty acids as tracer of trophic relationships was discussed.

Prevalence of White Spot Syndrome Virus (WSSV) in Marine Organisms around the Shrimp Farm and Polychaete Worm-Mediated Transmission of WSSV to Fenneropenaeus chinensis (새우 양식장 주변 생물의 흰점바이러스 보유율 및 두토막눈썹참갯지렁이의 대하 Fenneropenaeus chinensis에 대한 흰점바이러스 전달 효과)

  • Kim, Keun-Sik;Park, Sang-Yong;Lee, Il-Ro;Nam, Yoon-Kwon;Bang, In-Chul
    • Journal of fish pathology
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    • v.22 no.1
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    • pp.15-21
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    • 2009
  • White spot syndrome virus (WSSV) is a strong causative agent for high mortality in cultured and wild shrimps. From this study, the WSSV prevalence in marine organisms around shrimp farm as well as live feed-mediated transmission of WSSV to farmed shrimps were investigated. Based on nested-PCR method, WSSV was detected in wide array of marine organisms including Perinereis aibuhitensis (81.3% of prevalence rate, 13/16), Enedrias fangi (100%, 16/16), Ruditapes philippinarum (20%, 2/10), crab larvae (100%, 10/10), copepoda (30%, 3/10), Periophthalmus modestus (50%, 5/10), Pachygrapsus crassipes (10%, 1/10), Helice tridens (20%, 2/10) and Neomysis sp. (70%, 7/10). On the other hand, WSSV was not detected in Bullacta exarata, Uca arcuata, and Reishia clavigera. The percent prevalence of WSSV in wild shrimps, Fenneropenaeus chinensis was only 6%, but markedly increased up to 56% after a feeding trial using polychaete worms for one month, indicating that the live feed is one of significant carriers of WSSV to shrimps under practical farming conditions.