• Animal Systematics, Evolution and Diversity
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• 제10권2호
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• pp.217-229
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• 1994

The napuliar stages of Harpaciticus nipponicus Ito reared in the laboratory are descirbed and illustrated in detail. Ovigerous females of h. nipponicus were collected from the intertidal zone of Kuryongpo Yougil-gun Kyongangbuk-do. Korea. This species passed through 6 naupilar stages before metamorphosis to the first copepodid stage. At $20^{\circ}C$, the first copepo양 stage was attained in 6-8 (mean 7 ) days after hatching. The nauplii of Harpacticus species can be distinguished from those of other Harpacticid genera by the maxillule, pereiopods, and caudal setae. The nauplii of h. nipponicus are similiar in morphology to those of H. uniremis but distinguished by the differences in naupliar size and appendage setation. A key to identify the naupliar stages of this speices is briefly discussed.

• 한국동물학회:학술대회논문집
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• 한국동물학회 1996년도 한국생물과학협회 국제학술대회
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• pp.59.1-59
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• 1996

No Abstract, See Full Text

• 한국동물학회:학술대회논문집
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• 한국동물학회 1996년도 한국생물과학협회 국제학술대회
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• pp.78.2-78
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• 1996

No Abstract, See Full Text

• 환경생물
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• 제29권4호
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• pp.379-387
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• 2011

Copepod nauplii plays an important role as a linker between the microbial food web and classical food chain in marine ecosystem and is an essential food source for early stage of many larval fishes. Study on the influencing factors on the growth of copepod naupliar stages has been rarely carried out in despite of these ecological significances. Many studies have shown that food availability and temperature are major factors to influence copepod growth. However, due to the complicated environment parameters in coastal ecosystem, the relationships between growth of copepods and influencing factors are still unclear under the natural condition. Growth rates of the copepod $Acartia$ $hongi$ nauplii were measured in Kyeonggi Bay from February to December 2001. $Acartia$ $hongi$ is numerically abundant and widespread predominant species in the coastal regions of the Yellow Sea and occurs continuously throughout the year, with a maximum peak in late spring. The naupliar growth rates of $Acartia$ $hongi$ by the artificial cohort method varied from 0.03 to 0.18 $day^{-1}$, with a mean of 0.09 $day^{-1}$. The overall naupliar growth rates showed a significantly positive relationship with the variation in water temperature. However, Previous study reported that the growth rates of adult $Acartia$ $hongi$ were primarily influenced by the variation in chlorophyll-$a$. Therefore, these differences demonstrated that the influencing factors of growth did not correspond with the developmental stages. The results of this study suggest that the dissimilarity of growth between nauplius and adult female resulted from the size-dependant difference in food availability and the growth of older developmental stages containing adults are more food-dependent than juveniles.

• 생명과학회지
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• 제11권5호
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• pp.470-475
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• 2001

실험실에서 부화한 Nitocra spinipes Boeck, 1865의 유생을 수온 2$0^{\circ}C$, 염분농도 33.3$\textperthousand$에서 사육하고 그 유생발생단계를 자세히 기술 및 도시 하였다. 본 종은 6개의 nauplius 유생기를 가지며, 부화후 8-10일후에 copepo양 1기가 되었다. 이 종의 유생기는 제1작은 턱다리, 가슴다리의 발생시기, 그리고 caudal setae의 수 등의 특징에 따라 구별되었다. 또한 이미 연구된 Harpacticoida 내의 유생의 제 2, 3촉각의 외지의 체절을 비교하여과 수준에서의 특징을 밝혔다.