• Korean Journal of Fisheries and Aquatic Sciences
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• v.44 no.4
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• pp.378-382
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• 2011

The feeding ecology of bluefin searobin Chelidonichthys spinosus around Jeju Island was examined. Specimens were caught every autumn from 2004 to 2007. The primary prey items of C. spinosus included fish, shrimp, and crabs. Chelidonichthys spinosus preyed upon a wide range of sub-pelagic crustacean groups(e.g., Leptochela gracilis, Leptochela sydniensis). This species was also an opportunistic feeder, exploiting the available prey groups in each area(i.e., L. gracilis in the South Sea and East China Sea groups and L. gracilis and L. sydniensis in the Yellow Sea group). The main prey group of this species changed from demersal shrimp to pelagic shrimp with prey environmental changes. Observed ontogenetic shifts in diet were relatively clear despite substantial overlap between the 10 cm and 20 cm C. spinosus groups.

• Korean Journal of Ichthyology
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• v.19 no.1
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• pp.51-56
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• 2007

The feeding habits of bluefin searobin (Chelidonichthys spinosus) were studied based on the examination of stomach contents of 646 specimens collected from January 2005 to December 2005 in the coastal waters off Busan, Korea. The size of C. spinosus ranged from 14.0 to 38.9 cm in standard length (SL). C. spinosus mainly consumed shrimps such as Solenocera melantho, Leptochela sydniesis and Trachysalambria curvirostris. Its diet also included crabs and fishes. Smaller individuals (15~25 cm SL) consumed small shrimps such as L. sydniesis, crabs and fishes. The portion of these prey items decreased with increasing fish size, and this decrease was paralleled with increased consumption of lager shrimps such as S. melantho and Trachysalambria curvirostris. The prey size increased with the increase of fish size.

• 한국해양학회지
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• v.26 no.2
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• pp.101-107
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• 1991

We report on the seasonal fluctuation of a Poecilostomatoida copepod, Pseudomyicola spinosus associated with the blue mussel, Mytilus galloprovincialis in the Yongsan River estuary (34$^{\circ}$47N, 126$^{\circ}$27'E). P. spinosus has four generations a year, seasonally succeeding each other. The generation that occurs during summer has the highest number of individuals. From June to October with the exception f September, males dominated while female outnumbered from November to May with the exception of January. It is possible to find ovigerous females all year with the exception of February. The largest number of ovigerous females occurs a month earlier than copepodids do. The percentage of C1 to C3 is approximately 4% of the total number of copepodids, indicating that in situ infestation by copepodids mainly occurs in C4 stage.

• Archives of Pharmacal Research
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• v.12 no.4
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• pp.263-268
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• 1989

From the seeds of Zizyphus vulgaris var. spinosus, aporphine alkaloids : nuciferine, N-methylasimilobine, nornuciferine, norisocorydine, caaverine and tetrahydro benzylisoquinoline alkaloid : (+) coclaurine were isolated and identified. Zyzyphusine, a new quaternary aporphinium alkaloid form butanol soluble fraction was isolated and characterized by spectral data.

• Korean Journal of Organic Agriculture
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• v.16 no.1
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• pp.127-142
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• 2008

This study was carried out to germination characteristics by temperature conditions and allelopathic effects of aqueous extracts on Amaranthus spinosus L. in order to investigate the competitive dominant in plant ecosystem and possibility application of natural herbicide. A. spinosus L. sprouted after 24 hour from seeding in $30{\sim}45^{\circ}C$ treatment. The germination ratio of A. spinosus L. was the highest estimated at 63.3(${\pm}2.9$)% in $40^{\circ}C$ treatment, followed by 33.3(${\pm}2.9$)% in $35^{\circ}C$, 1.7(${\pm}2.9$)% in $30^{\circ}C$ and 5.0(${\pm}0.0$)% in $45^{\circ}C$ treatment. It was generally decreased the Relative Germination Ratio(RGR), the Relative Elongation Ratio(RER), the Relative Fresh weight Ratio(RFR) of receptor plants by the aqueous extracts of concentration of A. spinosus L. but it was differently inhibited the kind of receptor plant species. And it was different effected among growing regions that aqueous extracts of concentration of A. spinosus L. inhibited more root than shoot. The total phenolic compounds content of A. spinosus L. was decreased gradually middle, first and last of growth stage, and gradually decreased to leaves, roots and stems. We think that A. spinosus L. appeared high germination ratio at a short period and showed allelopathic effects on other plants. Therefore A. spinosus. L. hold the competitive dominant of plant ecosystem in Jeju Island and possibility application of natural herbicide.

• Archives of Pharmacal Research
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• v.27 no.12
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• pp.1216-1219
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• 2004

Spinoside, new coumaroyl flavone glycoside was isolated from the n-butanol fraction of the mathanolic extract of the whole plant of Amaranthus spinosus and assigned the structure 7-pcoumaroyl apigenin 4-O-${\beta}$ -D-glucopyranoside (1) on the basis of spectroscopic techniques including 1D and 2D NMR spectroscopy. In addition ${\alpha}$ - xylofuranosyl uracil (2), ${\beta}$ -D-ribofuranosyl adenine (3) and ${\beta}$ -sitosterol glucoside (4) have also been isolated for the first time from this species.

• Animal cells and systems
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• v.8 no.1
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• pp.13-18
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• 2004

Pseudanthessius spinosus n. sp. is described as an associate of the sea urchin Clypeaster japonicus Doderlein from Cheju Island in Korea. The new species may be easily distinguished from its congeners by having four spines and five setae on the third exopodal segment of leg 4. It is the second known species of the genus from Korean waters.

• Archives of Pharmacal Research
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• v.10 no.4
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• pp.203-207
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• 1987

Sedative principles of the seeds of Zizyphus vulgaris var. sphinosus have been characterized as sanjoinine-A (frangufoline), nuciferine and their congeners. Also, heat treatment of sanjoinine-A-produced a more active artifact, sanjoinine-Ahl, which provides a scientific basis for heat-processing (roasting) of this Oriental medicine.

• Korean journal of applied entomology
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• v.55 no.3
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• pp.205-214
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• 2016

A taxonomic study of Korean Berosus Leach is presented. Four species [Berosus (Berosus) japonicus Sharp, Berosus (Berosus) punctipennis Harold, Berosus (Enoplurus) lewisius Sharp, and Berosus (Enoplurus) spinosus (Steven)] in two subgenera are recognized, one of which [B. (E.) spinosus] is reported for the first time in Korea. We also found that B. (B.) puchellus MacLeay previously recorded in Korea was an incorrect identification of B. (E.) lewisius Sharp. Habitus and SEM photographs, key and diagnoses of the known species are provided.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.24 no.6
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• pp.369-396
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• 1991

Nine species of copepod parasites are recorded from nine Korean cultured bivalves. One new species, Lichomolgus similis n. sp. is included, and other eight species are: Conchyliurus quintus, Pseudomyicola spinosus, Myicola ostreae, Ostrincola koe, O. japonica, Herrmannella longicaudata, Modiolicola bifidus, M gracilicaudus. The relationship between the copepod parasites and their host bivalves is discussed.