• Korean Journal of Ichthyology
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• v.33 no.4
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• pp.273-277
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• 2021

The feeding habits of the pointhead flounder, Cleisthenes pinetorum were studied in the West Sea in Korea. The samples were investigated using 360 specimens (21.7~48.1 cm in total length) collected by gill net of the coastal waters from January to December 2019. As a result, C. pinetorum consumed mainly Ophiuroidea and Pisces, but also ate small amounts of Macrura, Echinodermata, Amphipoda and Brachyura. The results of this study showed a difference with those of main feed habits of C. pinetorum caught in the coastal waters of Kori (Huh and Baeck, 2003). The proportion of fishes in prey items increased with size-related while that of Ophiuroidea decreased. As total length of C. pinetorum increased the mean number of preys per stomach (mN/ST) and weight of prey per stomach (mW/ST) tended to increase.

• Korean Journal of Ichthyology
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• v.12 no.1
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• pp.54-61
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• 2000

Feeding habits of Zoarces gilli collected in the coastal water off Gadeok-do, Korea from March 1998 to February 1999 were studied. Z. gilli was a carnivore and consumed mainly shrimps, gammarid amphipods, fishes, bivalves and cumaceans. Its diets also included small quantities of copepods, caprellid amphipods, ostracods, crabs, squids, gastropods, ophiuroids and polychaetes. It showed ontogenetic changes in feeding habits. Individuals of small size (10~15 cmSL) fed mainly on small prey organisms such as gammarid amphipods, bivalves, cumaceans and ostracods. However, larger shrimps and fishes were heavily selected with increasing fish size.

• Korean Journal of Environmental Biology
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• v.32 no.1
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• pp.49-57
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• 2014

Orb-web spiders can be considered as an effective bio-indicative animal to monitor the ecological air pollution of certain habitat since they have limited shifting ability during their life spans. In this study we revealed the fine structural characteristics of booklung in the orb-web spider Nephila clavata, and its bio-indicative significance in the monitoring environmental asbestos exposure. The high resolution scanning electron microscopy results suggest that the cuticular spikes near the atrium could be act as an effective filtering structure for dust materials. Furthermore, inner cuticular spikes which protruded across the air sacs, have the functions not only sustaining appropriate respiratory volume of each air sac but also help to enhance respiratory capacity by maximizing the gross surface area for gas exchange. Interestingly, in spite of short exposure, the asbestose fibrils were effectively captured on the surface of the atrial cuticular spikes. Furthermore, histologic damages were observed due to penetration of asbestos fibrils through air sacs and fixed on the hemolymph space. In addition, although accumulated mass of hemocytes were observed near the fibrils, there were no asbestos bodies or coagulated hemocytes were found on the surface of the fibrils, This could be mainly due to the short exposure period towards asbestos. Briefly, these results indicate the spider's booklung could be valuable tool in the detection ecological air pollutants.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2003.05a
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• pp.268-269
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• 2003

줄새우 (Palaemon paucidens De Haan, 1844)는 징거미새우과 (Palaemonidae)에 속하는 줄새우속 (Genus Palaemon)의 한 종이다. 줄새우류 (Palaemonid shrimps)는 담수지역에서 하구지역, 해양까지 환경의 변화 폭이 매우 큰 지역에 다양하게 서식하는 종으로서 우리나라에서는 13종이 분포하는 것으로 알려져 있다 (국립수산진흥원, 2001). (중략)

• The Journal of the Petrological Society of Korea
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• v.21 no.2
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• pp.217-233
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• 2012

Major elements abundances of Cretaceous to Tertiary volcanic rocks in Kyongsang basin are similar with Southern Volcanic Zone (SVZ) in Andes. Sr, K, Rb, $Ba{\pm}Th$ abundances, which have low ionic charge, are selectively fertile, on the other hand Ta, Nb, Ce, P, Zr, Hf, Sm, Ti, Y, Yb, Sc, Cr abundances are low. K, Sr, Th show characteristic spikes and Nb show remarkable trough on trace elements spider diagram. Trace elements abundances are higher than that of Andes which is supposed to mantle sources of Kyongsang basin volcanic rocks are produced lower degree of partial melting than SVZ in Andes.

• Proceedings of the Korea Water Resources Association Conference
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• 2007.05a
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• pp.1120-1124
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• 2007

본 연구에서는 하수재이용에 따른 영향을 분석하기 위하여 수질, 토양 및 지표생물 모니터링을 실시하였으며 이를 분석하였다. 본 시험을 위하여 경기도 수워시 하수처리장 인근의 재이용 시험지구와 경기도 화성시 팔탄면 소재의 기천 시험 포장을 대비지구로 선정하였다. 본 연구에서는 환경부에서 제시한 하수처리 재이용 수질 권고기준에 제시된 수질기준과 본 시험에 사용된 재처리수를 비교하였으며, 대비지구의 경우 농업용수 수질기준과 비교하였다. 관개용수에 따른 토양에서의 영향을 분석하였으며, 재이용 관개지구가 대비지구에 비하여 TN, TP의 영양염류와 EC의 값이 높게 나타났다. 그리고 중금속의 토양집적은 나타나지 않았다. 농업용수 재이용에 따른 생태 환경 영향을 분석하기 위하여 대상지구에 지표생물 계측망을 구성하여 영농기간 중 생물다양성의 서식처 유형과 분포, 우점 구조, 그리고 육상지표생물의 발생 정도에 대하여 조사 분석하였다. 분석결과, 실험구와 대조구 두 지역의 곤충 및 거미류 종구성, 기능구별 유사도 등은 유사도가 높게 나타났으며, 우점종 구조에서도 차이가 없었다. 다만, 농업재용수의 높은 유기물 함량에 의해 실험구 지역에서 깔따구의 발생량이 많았다.

• Korean Journal of Ichthyology
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• v.25 no.3
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• pp.163-168
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• 2013

Two flatfish species were collected between January 2010 and August 2010 from fishing vessels operating with fishing, gill net and shrimp trawls along the coastal waters off Tongyeong, Korea in order to examine feeding habits. Kareius bicoloratus fed mainly on bivalves and fishes, whereas Clidoderma asperrimum fed mainly on ophiuroids. Our feeding strategy graphical method reveled that K. coloratus and C. asperrimum were specialist predator, with a narrow niche width.

• Animal Systematics, Evolution and Diversity
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• v.18 no.1
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• pp.165-179
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• 2002

In spite of dramatic change of environmental condition since Cambrian big-bang (explosion occurred ca.540 mya, the phylum Arthropoda retains a great diversity, and it is estimated approximately that 1-10 million arthropod species are extant on the earth. Except for an extinct arthopod subphylum Trilobita, extant arthropods could be divided into five subphyla: Hexapoda, Crustacea, Myriapoda, Chelicerata, and Pycnosonida. During the last century, systematists have disputed about interrealtionships among Arthropoda and its relatives (Onychophora, Tardigrada, and Pentastomida), arthropod phylogenetic position within protostome animals, monophyly or polyphyly of the phylum Arthropods, and interrelationships among five arthropod subgroups (subphyla) etc. Recently, new animal phylogeny was reported that protostomes could be clustered into two groups, Lophotrochozoa and Ecdysozoa, and molting animals such as Nematoda and Arthropoda were included within the Ecdysozoa. On the basis of the new animal phylogeny, first of all, I would mention phylogenetic positions and relationships of Arthropods and its relatives to introduce controversies of arthropod phylogeny in phylum level of animals. After that, I focused mainly on the controveries related to arthropod monophyly and phylogenetic relationships among four major arthropod groups except Pycnogonida. In this work, Pycnogonida which is a relatively small group and one of the five arthropod subphyla was not handled significantly although there are some controversies if it is a sister taxon of chelicerates or the most primitive arthropod group (namely, a sister of four remains arthropod groups).

• The Korean Journal of Soil Zoology
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• v.4 no.2
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• pp.75-80
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• 1999

Two years-study with litter bag (mesh size : 0.4 mm, 1.7 m) was carried out from Nov., 1996 to Sept., 1998 to investigate the soil microarthropod community in the process of needle leaf secomposition of Korean pine (Pinus koraiensis) forest in Namsan and Kwangreung, where were supposed to be under different environmental selective pressures. Soil arthropoda collected from litter bags were sorted into suborders or higher taxa. Acari and Collembola were dominant groups, which were 61-68% and 27-35% of total soil arthropod in their numbers, respectively. Among Acari, Oribatida was major group, and Gamasida and Actinedida were minor groups. Abundance of Acari was a little higher in Kwangreng than in Namsan. But there was not significant difference between the arthropod community structure of Namsan and Kwangreng forest. And the different mesh sizes (0.4 mm and 1.7 mm) of litter bags could not make significantly different community structures in the litter bags. One taxon showed different pattern of population dynalics from another. But Oribatida, Gamasida and Collembola showed peak density in July, 1997. All taxa showed lower population densities in cold season i.e. Nov., Jan. and March. There was not significant difference in decomposition rate between Namsan and Kwangreng forest, and between mesh sizes of litter bags. % residual mass of needle leaf was about 40% at 22 months after litter fall.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.32 no.1
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• pp.10-17
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• 1999

Feeding Habits of Acanthogobius flavimanus collected from the eelgrass bed in Kwangyang Bay from January to December 1994 were studied. A. flavimanus was a carnivore which consumed mainly polychaetes, crabs, shrimps, gammarid amphipods and fishes. Its diets included small quantities of ophiuroids, gastropods, bivalves, caprellid amphipods, isopods and tanaids. It showed ontogenetic changes in feeding habits. Small individuals fed mainly on polychaetes and amphipods. While the consumption of polychaetes and amphipods decreased with increasing fish sin, the consumption of shrimps, crabs and fishes increased. A. flavimanus fed diverse prey organisms in adult stage. The relative proportion of the major prey items changed with season. Although the consumption of polychaetes, shrimps and gammarid amphipods was relatively high in spring and autumn, A. flavimanus fed various prey organisms in nearly equal proportions in the other seasons.