• Animal Systematics, Evolution and Diversity
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• v.32 no.2
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• pp.141-147
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• 2016

The genus Discorsopagurus and two species belonging to this genus, Discorsopagurus maclaughlinae and Discorsopagurus tubicola, are herein first reported in Korean waters. Species belonging to Discorsopagurus are easily distinguished from other hermit crabs of the family Paguridae by their telsons that lack indentations and other characteristics such as straight abdomens, fused third and fourth abdominal tergites, and symmetrical uropods. Discorsopagurus maclaughlinae and D. tubicola were found to live in a tube made by a polychaete tubeworm. The two species differ in the shape of the posterior margin of the telson, the length of the pereopod, and the presence of setae on the antennal flagellum. Discorsopagurus tubicola is reported for the second time in the world. In this paper, there will be provided plates and descriptions of the two species.

• Fisheries and Aquatic Sciences
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• v.19 no.8
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• pp.34.1-34.12
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• 2016

Ten species of Galatheoidea (squat lobsters), belonging to two families, were collected in the Korean exclusive economic zone: Galathea balssi Miyake and Baba, 1964, Galathea orientalis Stimpson, 1858, Galathea pubescens Stimpson, 1858, and Galathea rubromaculata Miyake and Baba, 1967 belonging to Galatheidae; Bathymunida brevirostris Yokoya, 1933, Cervimunida princeps Benedict, 1902, Munida caesura Macpherson and Baba, 1993, Munida japonica Stimpson, 1858, Munida pherusa Macpherson and Baba, 1993, and Paramunida scabra (Henderson, 1885) belonging to Munididae. The present study comprises the morphological description of these ten species, including drawings and color photographs, a brief review of their regional records, and a key for their identification. Although all species are common in Japanese waters, G. balssi, G. rubromaculata, B. brevirostris, C. princeps, M. caesura, and M. pherusa are new to Korean marine fauna.

• The Korean Journal of Zoology
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• v.36 no.3
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• pp.391-401
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• 1993

The eight species, Axiopsis (Axiopsis) princeps, Petrolisthes japonicus, Pachycheles stevensii, Paguristes acanthomerus, P. japonicus, Elassochirus cavimanus, Pagurus Japonicus, P. trigonocheirus, are added to the thalassinidean and anomuran fauna of the areas of the Ulreung and Dogdo Islands. With the previously reported 10 species from these areas, the total 18 spedes are listed and an illustrated key is provided.

• Animal Systematics, Evolution and Diversity
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• v.31 no.2
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• pp.107-113
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• 2015

Two diogenid hermit crab species, Dardanus lagopodes and Diogenes deflectomanus, are newly reported from Korea. Dardanus lagopodes is distinguished from the other species of genus Dardanus in Korea by having setae with cream-colored tips on the cephalothorax and the following characteristics: ocular peduncles somewhat longer than antennular peduncles, and the pereopod without a longitudinal sulcus and scute-like projections. Diogenes deflectomanus is similar to D. nitidimanus but can be distinguished by having the fixed finger of the left cheliped bent slightly downwardly and the following characteristics: slightly shorter ocular peduncle, elongated left cheliped with small granules on the surface, right cheliped without calcareous teeth on the cutting edge of the dactylus, and the minute spine of post-median margin of the telson is not well developed. The geographical distributions of these two species are extended by the present study. In particular, D. deflectomanus in the current study is the first report outside Chinese waters. Now, 20 species of the family Diogenidae are known in Korean waters.

• Animal Systematics, Evolution and Diversity
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• v.20 no.2
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• pp.87-98
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• 2004

Two pagurid hermit crabs of the genus Pagurus, P. proximus Komai, 2000 and P. simulans Komai, 2000, were collected from the East Sea of Korea are reported. Brief descriptions and illustrations of these two species are provided. Both have been confounded with P. brachiomastus (Thallwitz, 1891) until recently Komai (2000a) reviewed the taxonomic status of this species complex. Kim's (1973) record of P. brachiomastus from Korea was synonymized to P. proximus by Komai (2000a) and the latter in Korean waters is confirmed through this study. P. simulans is recorded for the first time from Korea as well as the East Sea (Sea of Japan).

• Korean Journal of Ichthyology
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• v.18 no.3
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• pp.216-222
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• 2006

Feeding habits of Pagrus major collected in the coastal waters off Busan from January to December 2004 were studied. P. major ranged form 8.5 to 44.6 cm in standard length. P. major was a carnivore which consumed mainly hermit crabs, amphipods, crabs, shrimps, polychaetes, echinoderms, and fishes. Its diets included small quantities of gastropods, bivalves, stomatopods, cephalopods, cnidarians, and isopods. It showed ontogenetic changes in feeding habits. Small individuals (8~15 cm SL) preyed mainly on shrimps. However, individuals from 15 cm to 25 cm SL preyed mainly on hermit crabs and polychaetes. Individuals over 25 cm SL preyed mainly on fishes and echinoderms.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.55 no.5
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• pp.705-713
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• 2022

The feeding habits of Hexagrammos otakii were studied by analyzing the stomach contents of 508 specimens collected from July 2009 to December 2010 off the Yeosu coast of Korea. The total length of the H. otakii specimens ranged from 10.7 to 41.5 cm. H. otakii was found to be a bottom-feeding carnivore that mainly consumed brachyura, amphipoda, but also sonsumed cephalopoda, pisces, anomura, polychaeta, and gastropoda. It was shown through relative importance analysis that the benthic share was 58.1% for brachyura, 24.5% for amphipoda, 7.5% for caridea, and 7.3% for pisces. Brachyura was the main prey item for H. otakii, occupying 35% of the stomach contents. The proportion of brachyura and amphipoda decreased with the growth of H. otakii, and their decrease paralleled the increased consumption of pisces. The shift in feeding habits to larger prey organisms with increasing fish size seems to be one of survival strategies to maximize net energy gain.

• Korean Journal of Ichthyology
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• v.27 no.2
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• pp.142-148
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• 2015

The feeding habits of the Pacific cod Gadus macrocephalus were studied using 620 specimens collected by bottom trawl and pound net in the Southeast sea of Korea, from February 2012 to June 2013. Of 620 specimens, 192 contained food and 428 were empty. The total length (TL) of individuals used in this study ranged from 20.4 to 95.2 cm. Pacific cod mainly consumed Pisces, Macrura, and Cephalopoda. Its diet also included small quantities of Anomura, Brachyura, Mysidacea, Isopoda and Amphipoda. The proportion of Pisces in prey items increased with increasing Pacific cod length, but seasonal difference was not observed. The proportion of Macrura and Cephalopoda decreased with growth, and seasonal differences were apparent. Macrura were taken there mainly from autumn to winter, whereas Cephalopoda were consumed from spring to summer.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.2 no.1
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• pp.1-15
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• 1969

A study on the complete zoeal development and the glaucothoe of Pegurus lenuginosus de Haan wvas conducted in the laboratoy. 1) P. lanuginosus had four zoeal stages and a single glaucothoe stage. 2) At mean temporature $13.6^{\circ}C$ and mean salinity $33.67\%_{\circ}$, total duration of the zoeal stages was approximately 31-32 days. 3) The zoeal larvae of P. lanuginosus can be easily distinguished from those of other Pagurus species in having 7+7 telson processes of which number as well as shape is consistent throughout all the zoeal stages. 4) The antennal exopodite bears five pulmose setae, and the endopodite is naked throughout the zoeal stages. 5) The 6th abdominal segment has no mid_dorsal spine on its posterior margin during the 3rd and 4th stages. 6) The basipodites of uropod are naked on the distal margin. 7) Mandibular palp is absent in the 4th stage. 8) Antenna of glaucothoe is long extending far beyond the chelipeds. 9) Ocular scale is absent in the glaucothoe. 10) Glaucothoe has 3+3 telson processes on the distal margin of the telson.

• Korean Journal of Ichthyology
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• v.24 no.1
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• pp.35-40
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• 2012

The feeding habits of yellowback seabream, $Dentex$ $tumifrons$, were studied using 317 specimens collected in the coastal waters of Busan, from January to December, 2004. The size of the specimens ranged from 10.2 to 27.8 cm in standard length (SL). D. tumifrons had turned out a carnivore and opportunistic predator that consumed mainly shrimps. Fishes were next important prey items. Its diet also included anomurans, amphipods, crabs, echinodermata and cephalopods. Polychaetes, stomatopods, bivalves, ostracods, mysids and so on were minor preys. The individuals of smallest size class (10~13 cm SL) fed mainly on shrimps. In the next size class (13~16 cm SL), the proportion of shrimps decreased, whereas the consumption of anomurans, echinodermata and crabs increased. The proportion of these prey items decreased as body size increased, whereas the consumption of fishes gradually increased. Fishes accounted for almost stomach contents of larger individuals (more than 25 cm SL).