• 한국수산과학회지
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• 제34권1호
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• pp.38-42
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• 2001

Metapenaeopsis dalei의 탈피과정 및 기작을 구명하기 위하여 1999년 3월부터 5월 사이에 통영 용초도 주변 해역에서 채집된 자 각장 $13{\pm}2mm$의 개체를 사용하였다. 강모의 발달과 탈피단계는 미지 부분을 절개, 현미경으로 관찰하여 그 미세구조를 바탕으로 판정하였다. M. dalei의 주 탈피단계는 5개 (Stage A, B, C, D와E)로 나눌 수 있었다. Stage B에서는 setal cone의 생성을 확인할 수 있었으며, Stage $D_1'$에서는 setal shafts을 관찰할 수 있었다. 탈피단계 (Stage E)는 매우 빠르게 진행되어, 1분을 초과하지 않았다.

• Animal Systematics, Evolution and Diversity
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• 제23권1호
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• pp.9-20
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• 2007

The complete larval development of Chiromantes haematocheir was obtained by laboratory rearing. Five zoeal and one megalopal stages are described and illustrated in detail. Morphological characteristics of the larvae slightly differ from those of Lee (1988), especially in the setal presence of mouthpart appendages. Seven sesarminid zoeas (Parasesarma acis, Parasesarma pictum, Perisesarma bidens, Sesarmops intermedius, Chiromantes dehaani, Chiromantes haematocheir, and Nanosesarma gordoni) can be distinguished from each other in characters of the carapace spines, the antennal exopod and the fork of telson. A provisional key is first provided to aid the identification of seven sesarminid zoeas in Korea.

• 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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• 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.

• Animal cells and systems
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• 제11권1호
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• pp.69-77
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• 2007

Both sexes of a new species of Miraciidae belonging to the genus Amonardia Lang, 1948 are described. All materials collected from the cultivated brown alga, Undaria pinnatifida of Gijang, Korea. So far only one species, A. normani (Brady, 1872) from the algal bed at Jindo Island was recorded in Korea. The new species can easily be distinguished from its congeners by the combination of characters as follows: (1) shape of first antennular segment in female, (2) setal formular of mandible and maxillule, (3) setae of female sixth leg in female, and (4) shape of P2 endopod and exopod of fifth leg in male.

• 한국어병학회지
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• 제7권2호
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• pp.83-94
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• 1994

한국 양식산 우렁쉥이의 외투강에서 채집된 기생성 요각류 1 종이 Bonnierilla 속의 신종임이 확인되어 B. namhaesius 으로 명명하였다. 본 종은 제 1 안테나 8 개 마디의 강모식 3, 17+1 hook, 9+1 aesthete 5, 3, 2, 2+1 aesthete, 7+1 aesthete 를 갖는 점과 제 2 외지에서 제 4 외지 마지막 마디의 II, 5 및 caudal ramu 의 끝 부분에 2, 3, I의 형태를 갖으므로서 다른 종과 구별된다. 또한 Bonnierilla 속 중에서 수컷은 두번째로, 유생은 처음으로 기재한다.

• Ocean and Polar Research
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• 제32권4호
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• pp.369-377
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• 2010

To characterize ecotoxicological responses to a natural estrogen, $17{\beta}$-estradiol, we evaluated the life-history of the parental ($F_0$) and first generation ($F_1$) of the harpacticoid copepod, Tigriopus japonicus sensu lato. We evaluated the survival of nauplii and copepodites, the number of days until the emergence of copepodites and adult males, the sex ratio, brooding success, and the first brooding day of adult females. No significant differences in the survival rate were noted in response to treatments with different concentrations of $17{\beta}$-estradiol. However, $17{\beta}$-estradiol induced developmental delay and skewed the sex ratio toward males. Copepod development was delayed significantly in the 0.1 and $1\;{\mu}g\;l^{-1}$ $17{\beta}$-estradiol treatment groups relative to the control group, with a more pronounced delay in the $F_1$ group. Body length and biomass were significantly smaller in the $17{\beta}$-estradiol treated groups than in the controls. The male emergence of T. japonicus s.l. was very high in the 10 and $30\;{\mu}g\;l^{-1}$ $17{\beta}$-estradiol treatment group. Furthermore, exposure to $17{\beta}$-estradiol resulted in morphological deformities such as shrinking and swelling of the urosome, twisted setae of the caudal rami, setal loss of swimming legs, abnormal segmentation of antennules, and dwarfism.

• 대한수의학회지
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• 제24권2호
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• pp.213-226
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• 1984

가축(家畜)의 외부기생충(外部寄生蟲) 중에서 가장 피해(被害)가 크고 발생밀도(發生密度)가 높은 진드기인 Haemaphysalis longicornis의 표면(表面) 미세구조(微細構造)를 관찰(觀察)하기 위하여 주사전자현미경(走査電子顯微鏡)(Model; SEM ISI-DS-130)을 사용(使用)하여 그 영상(映像) 및 사진분석(寫眞分析)을 실시(實施)하여 그 결과(結果)를 보고(報告)하는 바이다. 본(本) 논문도감(論文圖鑑)에 수록(收錄)한 주요내용(主要內容)을 요약(要約)하면 다음과 같다. 1. 미포혈(未吸血) 암컷에 대(對)한 정면소견(正面所見) 및 미포혈(未吸血) 수컷에 대(對)한 정측면소견(正側面所見). 2. 암 수컷의 악체부(顎體部) 배면소견(背面所見) 및 복면소견(腹面所見). 3. 구하편(口下片) 치열(齒列)과 관상(冠狀) 주열(柱列)의 소견(所見). 4. 지관절(肢關節)의 구조(構造). 5. 배판(背板), 전절(轉節) 및 퇴절상(腿節上)의 강모(剛毛) 형태(形態)와 체표면(體表面) 구조(構造). 6. 촉지상(觸肢上)의 강모(剛毛)와 강모라의 형태(形態).

• Fisheries and Aquatic Sciences
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• 제26권11호
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• pp.649-659
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• 2023

The present study compared the structure of mixilliped of Fenneropenaeus chinensis between the larval and adult stage and investigated the effect of the structural difference on the immunity of F. chinensis. A fourteen day and a one-month long culture trial were conducted each with postlarvae and adults of F. chinensis in the biofloc, mixed water (50% biofloc:50% clear seawater) and seawater control. Immune-related genes mRNA expressions of postlarvae was analysed by quantitative reverse transcription polymerase chain reaction (qRT-PCR). And the analysis of adult stage immunity was carried out using phenoloxidase (PO) enzyme activation in haemocyte. In the postlarvae, the final body weights were 51.43 and 58.47 mg for the biofloc water and the control seawater, respectively. On the other hand, the final body weights of the adults were significantly different between biofloc water and seawater. The survival rate showed the opposite trend to the growth rate. Immune related genes mRNA expression levels in the postlarvae in the biofloc water were significantly lower than those in the seawater. While, the adult stage showed significantly higher PO enzyme activations in the biofloc water than in the seawater with the PO enzyme activation increasing proportionally to the biofloc concentration. This result is considerably explained by the observations of setal morphological structures of the third maxilliped: postlarvae have short serrulated setae that compose the small 'net' structure while adults had long and dense plumose setae. It is understood that the morphological difference of the maxilliped structure resulted in the different feeding abilities in the postlarvae and the adult F. chinensis to use bioflocs as food source.