• Animal Systematics, Evolution and Diversity
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• v.11 no.4
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• pp.417-434
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• 1995

Three species (0. kinbergi, 0. sarsi and 0 . sarsi vadicola) of the genus Ophiura (Echinodermacta: Ophiuroidea) were sampled from the various localities of Korean waters (Kyonggi Bay in March and September, 1989 and February, 1994; Yellow Sea in September and October, 1992; Southern Sea and Korean Strait in May, 1992; and eastern coasts adjacent to Kangnung in April, July, October, 1993 and January, 1994). Results of the examination of 250 Operational Taxonomical Units (OTUs) are presented based on the 20 morphometric variables to evaluate their taxonomic characters and positions. In cluster analysis, 250 OTUs were divided into 3 phenons (0. kinbergi, 0 . sarsi and 0 . sarsi vadicola) at the Euclidean distance levels of 6.84 and 2 phenons (a phenon composed of 0 . sarsi and 0 . sarsi vadicola and the other of 0. kinbergi) at 7.50. Stepwise discriminant analysis was used in order to produce a good discrimination model and 13 morphological characters (the total number of comb papillae, the number of primary comb papillae and shape of comb papillae (2). etc.) were extracted. The results of canonical discriminant analysis illustrated clear distinction among 3 phenons by the distance of 8.26 between 0 . sarsi and 0. sarsi vadicola, 24.24 between 0 . kinbergi and 0. sarsi vadicola and 21.63 between 0 . kinbergi and 0 . sarsi.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.5 no.3
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• pp.83-87
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• 1972

The fresh-water shrimp, Macrobrachium nipponensis (DE HAAN) is one of the largest of the shrimp species and one of the most important types fo protein food in fresh water fisheries. It can be found from Cheju island in the touth to Chung-ju in river or swamp, in the north. The breeding of these shrimps was studied by Chun and Yu (1967) and the relative growth was reported by author (1970a), but they did'nt provide other ecological features widely found in their natural environment. Shrimps were collected from the Nak Dong River, near Pusan, Korea once a month, from March to December 1963. The following is a summary of the results. 1. Larvae hatch from May to September, mainly in the month of July. 2. The average sex ratio ($male/female{\times}100$) is $62.9\%$ and goes down during the spawning season and rises from fall to spring season. 3. The minimum size of the female with eggs is aproximately 4.2cm in body length 3.5 gr in body weight, and 1.5 cm in carapace length. 4. Most shrimps of 5.75-7.75 cm in body length lay eggs. 5. The dorsal spines of the rostrum are 10-16(mode13) in number and the ventral spines of the rostrum are 1-5 (mode 3) in number.

• Korean Journal of Plant Resources
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• v.19 no.2
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• pp.259-264
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• 2006

This experiment was conducted to investigate the effects of medium composition, physical condition and growth regulators on prothallus proliferation in 3 fern species belonging to Aspleniaceae (Asplenium incisum, Camptosorus sibiricus and Phyllitis scolopendrium). In all of the 3 species, the effective medium for prothallus proliferation was Murashige and Skoog's basal medium with 1% sucrose and pH 5.8. The optimum $NH_4^+:NO_3^-$ concentration ratio of protahllus proliferation was 20:40mM (1:2 ratio) in A. incisum and P. scolopendrium and 30:30mM (1:1 ratio) in C. sibiricus. However, agar content of medium did not affect the rate of prothallus proliferation. Among the selected 6 kinds of growth regulators (NAA, IAA, 2,4-D, BAP, kinetin and lip), cytokinins generally has a promotive effect, but auxins showed an inhibitory effect on prothallus growth.

• Korean Journal of Environmental Biology
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• v.22 no.1
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• pp.12-27
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• 2004

Studies on the Korean cave fauna were reviewed during the last seven decades since the first record of Antrokorean gracilipes Verhoeff, 1938. The cave animals have been reported by only 112 papers, 16 repoyts and ten books. In the results, a total of 257 species is recorded representing four phyla, ten classes, 31 orders, and 94 families, and also the holotype localities of 87 species are recorded from 36 caves and four wells in Boron. Arthropods are predominant consisting of 241 species (93.8％), and true spiders (Araneae) are a most diverse group with 97 species (37.7％) including 21 Korean endemic species belonging to 29 families.

• Korean Journal of Ichthyology
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• v.24 no.2
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• pp.77-83
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• 2012

The feeding habits of the marbled flounder Pleuronectes yokohamae were studied using 395 specimens collected from January to December, 2010, in the coastal waters off Tongyeong, Korea. The size of P. yokohamae ranged from 10.5 to 38.8 cm in standard length (SL). P. yokohamae is a bottom-feeding carnivore that consumes mainly bivalves, amphipods and polychaetes. Its diet also includes small quantities nemertians, anthozoan, isopods, copepods, tanaidacean, shrimps, crabs and ophiuroids. Our feeding-strategy graphical method reveled that P. yokohamae was a generalized feeder, with a wide niche width. P. yokohamae mainly consumed bivalves, amphipods and polychaetes, and did not show significant ontogenetic changes in feeding habit without size over 22 cm. Prey size did not increase significantly as growing fish size.

• Korean journal of applied entomology
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• v.33 no.4
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• pp.270-280
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• 1994

This study was conducted to establish a nce insect pest control system, ~ es.ys tematic application of insecticides using carbohran and buproiezin, in Korea. The effects oi various dates of application and rates of buprofezin (25% WP) after carbofuran (3G) soil incorpombon in late May on the pop~~lation densities of the brown planthoppa (BPH) immigrating in July were investigated Appropriate application tune of buprofezin for the BPH that had evaded insecticidal effect of 5011 incorporated carbofuran was late July-early August. Application rate of buprofezln at 7.0g a.i/lOa was enough to suppress the BPH density. Buprofezin treatment after carbofumn soil incorporation could also suppress the whlte backed planthopper population but did not affect the densities oi the paddy rice spiders. Considering the charactenstics of occurring patterns of the nce insect pests in Korea. buprofezin treatment m late July or early August after carbofuran soil incorporation in late May can be a useful application system of ir~sectic~deins controlling early season Insect pests and migmtoly planthoppers on rice.

• Animal Systematics, Evolution and Diversity
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• v.10 no.1
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• pp.47-53
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• 1994

Two new species of the Chthoniidae, Mundochthonius minusculus, n.sp. and Mundochthonius bifurcatus n.sp. , are described herein . Korean Chthoniidae, thus, comprises a total of six recorded species from four genera.

• The Korean Journal of Soil Zoology
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• v.5 no.2
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• pp.47-62
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• 2000

This study investigated the effect of soil animals at forest fire area, and it carried out the mountain located at Jundae Ri, Houeng-chen Myen, Ha-dong Gun, Kyoung-Nam Province, southern part of Korea, where burned out about 50 hectars on April 11, 1997. Vegetation of the examined area absolutely dominated with the pines of 7-14 cm in diameter and 20 to 30 years old and the rest were covered with mixed forest with a shrub such as the oak (Quereus mongolia Fisch, Quereus variabilis BI, Quereus dentana Thunb), snowbell(Styrax japonica, S, et, z), lacquer tree (Rhus trichocarpa Mig), azalea (Rhododendron mucronulatum Turcz), etc. And there were simple area organized as a herbaceous plant, and the burnt area was poor experimental sites, where litter layer and herbaceous plant disappeard due to fire, and the unburnt area was rich in surface plant, dead leaves, twigs, etc. But the ground cover vegetations were poor in the unburnt area. The distribution of each animal groups, the seasonal fluctuation in population density, the biomass of meso$.$macroarthropods and the relationship between soil animal and some environmental factors were investigated and analyzed at each experimental area. The result are summarized as follow: 1. Identificated 257,087 individuals of soil microarthropods were classified into 7 classes and 24 orders of Arachinida, Insecta, Chilopoda, Symphyla, Diplopoda, Isopoda and Oligochaeta., and identified 8,006 individuals of the total meso$.$macroarthropods were classified into 7 classes and 20 orders of Arachinida, Insecta, Chilopoda, Symphyla, Diplopoda, Isopoda and Oligochaeta. 2. Among the total soil microarthropods, Arachinida formed 70.9%, followed by Insecta for 28.4% and among the total meso$.$macroarthropod , Insecta formed 57.6%, followed by Chilopoda for 23.8%.

• Journal of Food Hygiene and Safety
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• v.17 no.3
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• pp.152-156
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• 2002

Totally, 742 fishery products were collected at Garak wholesale market in Seoul from Jan. to Dec. in 2001. Vibrio parahaemolyticus were 12.5%(93/742). The detection ratio of V. parahaemolyticus by month was reached the maximum in summer season (July to September). The highest ratio with 22.9% were abtained from molluscs, followed by shellfishes with 15.3%, and fishes and crustaceans with about 8%. The ratio of serotypable strains were 15.2%(10/66) and identified serotyps of V.parahaemolyticus were K24, K28, K34, K42, K47 and K53

• Korean journal of applied entomology
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• v.60 no.1
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• pp.105-114
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• 2021

Ground-dwelling arthropods are important components in apple orchard providing beneficial ecological services of predation and decomposition as well as herbivory. Groundcovers are managed differentially in organic and conventional apple orchards influencing ground-dwelling arthropod assemblages. We conducted 3-year studies to assess the effects of orchard management relative to weed management on the abundance and diversity of ground-dwelling arthropods using pitfall trapping. Most arthropods were classified as higher taxonomical groups and functional feeding guilds, while carabid beetles were classified into species level. Coleoptera was the dominating taxon of all ground-dwelling arthropods. Abundance of herbivores and predators was significantly higher in organic apple orchards than conventional ones. Higher abundance and diversity of carabid beetles were found in organic orchards than in conventional orchards. The abundance of Araneae, Coleoptera, or carabid beetles was negatively correlated to weed management frequency. It was found that ground-dwelling arthropods were more influenced by weed management practices than the farming systems.