• Animal Systematics, Evolution and Diversity
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• v.7 no.2
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• pp.241-256
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• 1991

The systematic study of freshwater rotifers was conducted on the materials collected from 197 sites in South Korea. As a result, 9 species of Family Colurellidae were identified, 4 species ( 1 species and 3 subspeices) of which are new to the Korea fauna ; Courella uncinata uncinata, Squatinella rostrum rostrum, Lepadella patella patella, and L.elliptica. Total 165 species representing 13 families and 40 genera are now recorded by addign the species described in the present paper.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.05a
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• pp.361-362
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• 2000

해양의 대형무척추동물은 어류의 먹이가 되고, 서식처나 먹이를 놓고 어류와 경쟁을 하며, 심지어 어류를 포식하는 등 어류 군집 구조에 많은 영향을 주는 생물적 요인이 된다. 새우류는 절지동물문 갑각목 십각아목에 속하는 무척추동물이며, 국내에서 이루어진 새우류 군집에 관한 연구는 광양만 잘피밭에 서식하는 새우류 군집의 종조성과 계절 변동 (Huh and An, 1997), 고리 주변 해역 새우류의 종조성과 계절 변동(Huh and An, 1999)이 있을 뿐 아직까지 우리나라 연안에서 출현하고 있는 새우류의 군집 연구가 부족한 상태이다. 본 연구에서는 가덕도 주변 해역에서 출현하는 새우류 군집의 종조성과 계절변동을 파악함으로써 상위 영양단계를 점유하고 있는 어류 군집을 연구하는데 기초 자료를 제공하고자 하였다. (중략)

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.511-512
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• 2022

동물무늬는 서식지에 따라 야생에서 천적으로부터 살아남을 수 있는 중요한 역할을 한다. 동물무늬의 역할 중 하나인 자연과 야생 환경에서 천적의 눈을 피해 위장하는 기능이 있기 때문인데 본 논문에서는 기존 위장무늬의 개선을 위한 GAN 알고리즘 기반 위장 패턴 생성모델을 제안한다. 이 모델은 단순히 색상만을 사용하여 위장무늬의 윤곽선을 Blur 처리를 해서 사람의 관측을 흐리게 만드는 기존의 모델의 단순함을 보완하여 GAN 알고리즘의 활용기술인 Deep Dream을 활용하여 경사 상승법을 통해 특정 층의 필터 값을 조절하여 원하는 부분에 대한 구분되는 패턴을 생성할 수 있어 색뿐만 아니라 위장의 기능이 있는 동물무늬와 섞어 자연과 야생 환경에서 더욱 동화율이 높아진 위장 패턴을 생성하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1208-1210
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• 2023

이상치는 주로 저빈도로 발생하기 때문에, 이상치 탐지 분야에서는 정상 데이터만을 이용한 비지도 기반 학습 모델을 사용하는 방법들이 제안되었다. 따라서, 본 논문에서는 반려동물 센서 데이터를 이용해 비지도 기반 모델인 DASVDD을 활용하여 이상치를 탐지한다. 하지만 데이터셋에 이상치가 존재하지 않아 반려동물이 고빈도로 보여주는 A행동군(서다, 앉다, 엎드리다, 눕다, 걷다), 저빈도로 보여주는 B행동군(킁킁대다, 먹다)으로 분리하여 학습을 진행한다. 모델의 성능은 ROC-AUC을 기준으로 79.05%의 성능을 보여주는 것을 확인하였다.

• 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).

• Korean Journal of Organic Agriculture
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• v.17 no.2
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• pp.193-209
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• 2009

Total collected benthic macro invertebrates in rice paddy fields were identified 3 phylum, 5 class, 13 order, 25 family, 32 genera and 36 species, those in organic rice field were 12 order, 22 family and 28 species, and in conventional rice field were 10 order, 19 family and 25 species. The almost collected species inhabit lentic zone but Semisulcospira libertina, Corbicula fluminea, and Tipula sp. were habitat on lotic zone. The number of benthic macro invertebrates species was higher in organic paddy field than in conventional field. Eleven species were collected only on organic but eight species only on conventional field. The number of individuals were 870 on organic rice field which higher 3.6-fold on conventional field. The diversity indices of organic rice field were 1.57-2.45 and 0.71-2.61 in the first and second survey, respectively. The higher diversity indices, the lower dominance indices.

• Korean Journal of Poultry Science
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• v.51 no.2
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• pp.73-82
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• 2024

The gut microbiome of broilers is a critical factor in overall health and productivity. However, high summer temperatures and high stocking density (conventional farm condition) may cause stress to broilers, resulting in an imbalance in the gut microbiome. This study was conducted to compare the gut microbiome of broilers between spring and summer in welfare (Bosung, Jeollanam-do, South Korea) and conventional farms (Jangsu, Jeollabuk-do, South Korea). A total of 31 broilers were assigned to the following groups: conventional farm in spring (n = 8); conventional farm in summer (n = 8); welfare farm in spring (n = 7); welfare farm in summer (n = 8). Cecal digesta were collected from eight broilers from each farm, and microbiome analysis was performed using 16S rRNA gene sequencing. Beta diversity analysis indicated clear differences in cecal microbiome composition between spring and summerin both welfare and conventional farm. At the phylum level, analysis of conventional farm revealed a higher proportion of Bacteroidetes in spring than in summer. At the genus level, broilers exhibited a higher abundance of Bacteroides and Alistipesin spring compared to summer. In contrast, the difference in microbial flora composition observed in welfare farm was relatively small compared to conventional farm. In conclusion, the results of this study suggest that heat stress can negatively affect the caecum microbiome of broilers. However, improvements in the housing environment can mitigate the effects of heat stress.

• Journal of the Korean Home Economics Association
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• v.38 no.8
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• pp.13-27
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• 2000

The background of single animal figures was originated from those northern mounted nomadic groups, which was Scythe style Culture. The art of the nomads working in the Scythian idiom was small in size and essentially decorative in intention, yet practically every object which can be associated with any unit in this group of people possesses many of the attributes essential to a real work of art. Clarity of conception, purity of form, co-ordination of rhythm and balance, and not least, an understanding and respect for the material employed were triumphantly blended by the Eurasian nomads to produce a distinctive style. In Scythian art the multitude of animal representations well illustrates the reoccupation of this nomadic people with animals in their environment. Usually only wild animals are represented. Commonly depicted are: stags and deer, lions or other large cats, eagles, birds heads (perhaps of ravens), griffins, snakes, hares, fish, goats, rams, boars, moose (elk), yak, sheep and bears. The occasional exception to the wild animal rule is domesticated horses-important because the Scythians were horse bleeders and their whole culture revolved around their dependence on the horse. The nomads had little reason to create object in honour of gods or men, but they had an instinct for beauty and the wish to surround themselves with the animal forms in which they had come to delight The Scytians tried to combine in a single rendering all the salient points of the animal they were delineating. They archived considerable success in the difficult task of showing in a single image the various and often incompatible poses assumed by a single animal in the course of its life. Zoomorphic motifs were used not simple for decorative effect, but to trim the object into amulets, with magical power to assist in hunting, and to protect the owner from harm.

• Animal Systematics, Evolution and Diversity
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• v.18 no.2
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• pp.203-211
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• 2002

A new kinorhynch species belonging to the genus Echinoderes is described on the basis of the materials from the subtidal sediments and various macroalgae in the south and east coast of Korea. Echinoderes lanceolatus n. sp. is characteristic in having the subcuticular scars in subventral position on segment 3 and incomplete midventral articulation on segment 4, the middorsal spines a little shorter than the corresponding segments, the ‘brace-shaped’muscle scars at sternal plates of segments 9 and 10 in females, the flat posterior margin of terminal ventral plates and the lanceolate terminal tergal extension.

• Korean Journal of Environmental Biology
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• v.26 no.3
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• pp.159-169
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• 2008

This study was aimed to classify the intertidal macrozoobenthic community status after 2 years of Sea Prince oil spill, and oil spill effects along oil spreading track from heavily impacted to unaffected reference site. Field sampling was initiated in late February and continued through November 1998 seasonally, after 2.5 years of oil spill. 7 rocky sampling sites were selected among coastal regions coated and/or affected by the Sea Prince spilled oil. Identified species was 158 species, 65 family, 24 order, 9 class, 5 phylum. Mollusca was the dominant faunal group comprising 100 species (63.3%), and followed by 38 species of Crustacea (24.1%), 12 species of Echinodermata (7.6%), 5 species of Porifera (3.2%), and 3 species of Cnidaria (1.9%). On Dugpo of Sori Island, the fewest species was collected from 28 species to 35 species seasonally among sampling stations. But far away Dugpo toward Gamak Bay, the number of species increased, collecting the maximum on Sohwoenggan Island. At the wreck site of Sori Island, especially the species number of attached animals such as poriferans and anthozoans was very low compared to another site. The density and biomass on the higher tidal zone increased toward the low affected sites, but biomass on middle tidal zone decreased. The invertebrate biomass of study area was dependent on the sessile animals. The major dominant species were small-sized barnacles, Chthmallus challengeri, periwinkles, Littorina brevicula, mussels, Septifer virgatus, and so on. The biomass of C. challengeri and L. brevicula on the higher tidal zone was highest in the wreck site of Sori Island and decreased further and further. However, mussels on the middle tidal zone showed the inverse trends because of the larger individual size of mussel inhabited in Sori Island than those of another sites. As a result of community analysis, the effect of oil spill was not found distinctly. Several ecological indices and cluster analysis did not show the meaningful variation with oil track despite of the conspicuous differences among tidal heights. These indicate that the macrozoobenthic community level of oil spreaded zone recovered in some degree after the Sea Prince oil spill accident, but population or individual levels of dominant sessile animals took more recovery times.