• Animal Systematics, Evolution and Diversity
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• 제5권2호
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• pp.121-137
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• 1989

실험실에서 사육한 발콩게의 유생기를 자세히 기술, 도시하였다. 본 종은 5 zoea와 1megalopa 유생기를 가지며, 수온 25$^{\circ}C$에서 megalopa와 제1기 crab은 부화후 각각 21일과 31일 만에 나타났다. 엽낭게속의 유생은 갑각에 대한 이마가시 길이의 상대비에 의하여 콩게아과의 타 속과 달랑게아과의 타 아과의 유생들로부터 구별될 수 있다. 발콩게의 유생은 엽낭게의 유생과 형태적으로 매우 유사하나 유생의 크기와 부속지의 강모식의 차이에 의해 구별될 수 있다.

• Animal Systematics, Evolution and Diversity
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• 제13권1호
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• pp.1-8
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• 1997

실험실에서 포란한 박뿔게로부터 제 1조에아 유생을 얻었다. 제 1조에아 유생기의 형태적 특징을 상세히 기재 및 도시하고 이미 보고된 뿔게아과 다른 종의 조에아 유생들과 그 형태적 특징을 비교하였다. 박뿔게와 뿔게의 제 1조에아 유생은 형태적으로 유사하나 갑각후측연부와 구기부속지의 강모수와 등가시의 길이가 서로 다르다. 특히 구기부속지중 제 1소악의 내지 강모수가 다르기 때문에 뿔게유생에 대한 상세한 재기재를 필요로 한다.

• 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.

• Animal Systematics, Evolution and Diversity
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• 제26권1호
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• pp.1-9
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• 2010

The larvae of Oregonia gracilis are described, illustrated and compared with those of other known species of the Oregoniidae. The first zoea of O. gracilis of the present study is somewhat different from that of Hart (1960) especially in having a basis and an endopod of the first maxilliped with 2, 2, 3, 3 and 3, 2, 1, 2, 5 setations, respectively and an endopod of the second maxilliped with 1, 1, 5 setation. It is found the Oregoniidae must be a homogeneous group based on the zoeal morphology. A provisional key for the identification of the known zoeae of the Oregoniidae from the northern Pacific is provided.

• Animal Systematics, Evolution and Diversity
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• 제7권2호
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• pp.257-264
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• 1991

바지락에 공생하는 굴속살이게의 제 1조에아 유생에서 그 형태적 특징을 기술 및 도시하였다. 본종은 액극.배극.측극.이 없고 제 1소악과 제2소악의 내지가 각각 0.4, 1.2(3)의 강모를 제2악각의 내지가 2분절로 0.4의 강모를 가져 속살이게속의 유생특징을 잘 나타내고 있다. 그러나 제 1.2소악의 저절.기절.강모수가 이미 보고된 Muraoka와 Konishi(1997),Konishi(1983)의 것과 다를뿐만 아니라 숙주도 Mytilus 속이 아닌 Tapes이므로 한국산 바지락내에 공생하는 굴속살이게의 상세한 기재가 요청된다.

• Animal cells and systems
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• 제6권2호
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• pp.107-123
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• 2002

One ovigerous crab of Hemigrapsus longitarsis (Miers, 1879) was collected in Jeju Island, Korea and their larvae were reared in the laboratory. Five zoeal and one megalopal stages are described and illustrated in detail. Morphology of the zoeas slightly differs from that in the previous record. Within the genus Hemigrapsus, H. longitarsis shows similarity closer to H. sanguineus and H. penicillatus than to H. sinensis based on the zoeal morphology. The zoeas of H. longitarsis can be distinguished from those of the two other species in having a dorsal carapace spine with minute spinules which is naked in H. sanguineus and H. penicillatus. A provisional key is provided to aid the identification of the grapsid zoeas in Korea.

• 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.

• 한국수산과학회지
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• 제46권6호
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• pp.807-812
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• 2013

The energy budget of the larvae of pandalid shrimp, Pandalopsis japonica, reared in the laboratory from zoea to post-larva was investigated. Energy used during the growth of the shrimp larvae was calculated daily for feeding, growth, molting, and metabolism. The total energy used was 16.2 J for the entire larval stage. Molting energy loss was estimated at a total 1.03 J. Energy used for respiration was estimated at a total of 1.85 J. The intake energy by feeding reached a total of 77.69 J. The total sum of energies used by excretion and egestion was 58.61 J. Larvae assimilated 24.57% of ingested food and used 84.91% for somatic growth. The gross growth efficiency ($K_1$) was 22.19% for the entire larval stage, and the net growth efficiency ($K_2$) was 90.31%. Maintenance costs were estimated at 9.69% of assimilated energy for the entire larval stage.

• 한국양식학회지
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• 제20권3호
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• pp.194-198
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• 2007

Reproductive traits of Palaemon gravieri such as embryo size, number of embryo (fecundity), incubation period, larval development mode, larval development period, larval survival and larval growth were described and compared to analyze the correlation among those traits. Embryo volume is a primary factor determining other ensuing reproductive features. Egg volume was $0.042mm^3$ in the first developmental stage. Embryo volume in P. gravieri was comparatively small which is indicative of great number of embryo (y = 3.0161x + 0.0185 $R^2$ = 0.74 positive isometric relationship) and relatively long incubation period. Larvae survived from zoea 1 to post-larvae and it took 45 days at $22^{\circ}C$. Survival rate of the larvae was rather great in the early stage and thereafter steadily decreased. Daily growth rate of larvae in P. gravieri at $22^{\circ}C$ was 0.0195 mm on average. They grew steadily as time went by. Incubation period was between 10-14 days at $22^{\circ}C$. Larval development mode was almost complete planktotrophic. PNR (point of no return) appeared to be the third day on average. Survival rate of larvae without feeding declined rapidly between 3 and 4 days. Larval development period and stage frequency were 23-30 days and 11 stages which imply prolonged larval period and high mortality. The pattern of brood production followed fast successive parturial pattern. Most ovigerous female had mature ovary when they performed parturial molt soon after hatching (larval release).

• 수산해양교육연구
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• 제25권4호
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• pp.991-997
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• 2013

Distribution and occurrence of swimming crab, Portunus trituberculatus larvae were investigated in the mid-western coast of Korea in the Yellow Sea. P. trituberculatus larvae were collected in July and August from 2010 to 2012. Bongo net with 303 mesh was deployed once with a double oblique tow. Zoea I (ZI) densities were highest in all sampling months. Then densities of later larval stages decreased dramatically. In general, larval densities at the stations in northern parts and coastal areas were higher than those at the southern and offshore area. Because egg bearing seasons of P. trituberculatus in the study area are between April and August, larval densities, particularly, of ZI may be underestimated. Considering higher densities of ZI and lower ones of later stages, larvae may be transported to growing area and returned to the parental populations. Larval densities and sea surface temperature were not correlated.