• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.272-274
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• 2003

A few studies have examined the hatching response of copepod diapause eggs to various factors (Ban and Minoda, 1991; Chen and Marcus, 1997). Marcus (1979) monitored the hatching of diapause eggs of Labidocera aestiva and suggested that diapause eggs of marine copepods undergo a refractory phase similar to other diapausing organisms. (omitted)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.270-271
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• 2003

The genus of Pseudodiaptomus Herrick, 1884 presently comprises 74 species worldwide extending freshwater to hypersaline water(Walter, 2002). Of these, the post-embryonic developments of their naupliar and copepodid stages have been reported in only eight species: P euryhalinus, P. cornatus, P. richardi inequalis, P. marinus, P. binghami, P. poplesia, P. aurivilli and P. hessei. (omitted)

• Journal of Species Research
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• v.3 no.1
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• pp.27-34
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• 2014

Two species of Tortanus (Eutortanus) are newly recorded from shallow Korean waters: T. (E.) vermiculus Shen, 1955 and T. (E.) komachi Itoh, Ohtsuka and Sato, 2001. As a result of this study, five species are reported in the subgenus of the family Tortanidae in Korea. The sequence of cytochrome c oxidase subunit 1 (CO1) is also provided as a molecular characteristic.

• Korean Journal of Ichthyology
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• v.32 no.2
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• pp.97-102
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• 2020

The feeding habits of larval Ammodytes japonicus were examined. A total of 208 individuals were collected by RN80 Net from January to February, 2019 in the coastal waters of Gujora and Mangchi, Geoje, Korea. Range of notochord length of larval A. japonicus was 1.46~8.00 mm and fed mainly on copepods that constituted 99.9% in %IRI. The results of analysis in ontogenetic changes, divided with 3 classes (≤2 mm, 3~4 mm, ≥5 mm, Notochord length), was all classes mainly fed copepods. An opposite relationship was found between the calanoida and cyclopoida. When percentage of calanoida of copepods increased, cyclopoida of copepods decreased.

• Korean Journal of Environmental Biology
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• v.37 no.3
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• pp.299-308
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• 2019

The occurrence patterns of Acartia(Copepoda; Calanoida) species, A. erythraea, A. hongi, A. hudsonica, A. ohtsukai, and A. sinjiensis, were examined in the southern coastal waters of Korea in the summer in August 2012. The Acartia species had different spatial distribution according to environmental factors. A. erythraea showed higher density in a semi-closed bay (Gamak, Masan) where the dissolved oxygen was low (<2 mg L^-1). A. sinjiensis showed a high density in a semi-closed bay when the chlorophyll-a concentration was >2 ㎍ L^-1. A. ohtsukai showed a high density at water temperatures >26℃ and low salinity <30. A. hongi and A. hudsonica showed at water temperatures <27℃ and high dissolved oxygen (>5 mg L^-1). These results suggest that environmental factors (temperature, salinity, dissolved oxygen, and chlorophyll-a concentration) may affect the spatial distribution of Acartia species dominant in the southern coasts of Korea in summer.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.35 no.4
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• pp.445-450
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• 2002

A series of 29 sampling with a 330 ${\mu}$m and a 64 ${\mu}$m mesh size of nets was conducted at a fixed station in Ilkwang Bay, southeast cost of Korea, from Oct, 2, 1991 to Oct. 10, 1992, to investigate the effects of mesh size of nets on biomass estimation of copepod Acartia steueri. The catch of copepodite and nauplius stages of A. steueli taken by two nets with different mesh size was different, showing that all developmental stages of A. steueri were retained on the 64 ${\mu}$m mesh net, but only $\geq$stage 4 copepodite were caught by the 330 ${\mu}$m mesh net. Abundance and biomass in each developmental stage estimated with the 64 ${\mu}$m mesh net were significantly higher than those of the 330 ${\mu}$m mesh net, except for adult female and stage 5 copepodite in female. The body length as well as the body width is likely to affect the catch of the nets. The mean biomass of A. steueli estimated with the traditional 330 ${\mu}$m net was 2.8 times lower than the value obtained with the 64 ${\mu}$m mesh net. However, the seasonal patterns of the biomass were comparable. These results suggest that accurate sampling strategr of the entire copepods assemblage including nauplii and copepodites are essential when estimating the abundance and biomass of copepods for the better understanding of the role of copepods in marine ecosystem.

• Ocean Science Journal
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• v.43 no.2
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• pp.91-100
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• 2008

The neustonic calanoid copepods Pontella securifer Brady, 1883 and P. sinica Chen and Zhang, 1965 are first recorded in Korea. These species occur in high temperatures over $23^{\circ}C$ and in a range of salinity from 26.6 to 31.2 psu. We provide full descriptions of the two species and discuss their zoogeography.

• Korean Journal of Environmental Biology
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• v.21 no.4
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• pp.422-427
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• 2003

The spatio-temporal distribution of four coexisting acartiid species in two subgenera Acartiura (Acartia hongi and A. omorii) and Odontacartia (A. erythraea and A. pacifica) was examined at seven stations in the southwestern waters of Korea, between January to December 1998. A. hongi occurred dominantly in the northern regions from winter to spring while A. omorii predominated in the southern regions in spring and early summer when the more saline (> 33.0 psu) and high chlorophyll-$\alpha$ concentration water mass appeared. With the increase of temperature (> $20^{\circ}C$), however, both species disappeared and then replaced with A. erythraea and A. pacifica. A. erythraea (rare species), appeared in the middle regions where the high chlorophyll-$\alpha$ concentration ($3{\mu}g\; I^{-1}$) in the summer, while A. pacifica was abundant in all regions through summer and fall. It is suggested that the seasonal succession of the genus Acartia was subgenus-specifically affected by environmental factors such as temperature, salinity and chlorophyll-$\alpha$ concentration.

• Journal of the korean society of oceanography
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• v.33 no.1-2
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• pp.28-34
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• 1998

Variations in abundance, size and population structure of Calanus sinicus were studied in the southern waters of Korea in connection with hydrographic conditions during 1991-1992. Abundance was high in April and low in August. This species was concentrated inshore of a coastal temperature front, or around the temperature front in April. The 1st-3rd copepodites dominated in February and April, and adults in August. The mean population stages in February and April were younger than those in other survey months. This suggests that this species mainly reproduced during winter-early spring. In prosome length, the 1st-4th copepodites were larger in April than in other survey months, and the 5th copepodite and adult were the largest in February. Mean prosome length of C. sinicus showed weak inverse relationship with sea water temperature, but it was not statistically evidenced.

• Animal Systematics, Evolution and Diversity
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• v.23 no.2
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• pp.135-154
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• 2007

Eight calanoid species of 4 genera in 4 families are reported from the various brackish waters such as estuaries, brackish-water lakes, and coastal marshes in South Korea. Among them, Eurytemora affinis (Poppe) and Acartia (Acanthacartia) tsuensis Ito are newly added to Korean copepod fauna. Collection data, brief descriptions, illustrations and distribution maps for the eight species are prepared. A key to the genera and species of the brackish-water calanoids from Korea is also presented.