• 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.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 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.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.

• Korean Journal of Ichthyology
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• v.23 no.2
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• pp.128-134
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• 2011

The feeding habits of scorpion fish, Sebastiscus marmoratus, were studied using 324 specimens collected in the coastal waters of Tongyeong, from January to December, 2009. The size of the specimens ranged from 9.8 to 30.1 cm in standard length (SL). S. marmoratusis was a piscivore that consumed mainly teleosts such as Engraulis japonicus, Clupea pallasi and gobid fishes. Of the fish species Engraulis japonicus was the most preferred prey. Its diet also includes shrimps and crabs. Hermit crabs, polychaetes, bivalves and euphausia were minor preys. Smaller individuals (<13 cm SL) fed mainly on shrimps, crabs and fishes. The proportion of shrimps and crabs decreased as body size increased, whereas the consumption of fishes gradually increased. Fishes accounted for almost stomach contents of larger individuals (more than 19 cm SL). Seasonal changes in the S. marmoratusis diet were significant. Fishes was most common prey during summer, autumn and winter, whereas crabs and shrimps were mainly consumed during spring.

• 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).

• Korean Journal of Environmental Biology
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• v.22 no.3
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• pp.456-463
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• 2004

A faunal study on the marine decapods of Gogunsan Islands located in the western part of South Korea was performed during the period from August 3 to August 5 in 2003. As a result of the present study, a total 42 species in 17 families (Macrura: four species in two families, Anomura: nine species in four families, Brachyura: 29 species in 11 families) were identified. Of these, two species of shrimp, Athanas sp. and Alpheus sp., are new to Korea. Including these two species, total 20 species in 10 families are newly known to Gogunsan Islands. Fifty two species in 19 families were previously known to occur in this area. Therefore, a total 72 species in 24 families of decapods are now known to occur in Gogunsan Islands. Of the species collected in the present study, Palaemon (Palaemon) serrifer (Stimpson, 1860) in shrimps, Macrophthalmus japonicus De Haan, 1835 living at mud area and Scopimera globosa De Haan, 1835 at sand beach in crabs, and Hapalogaster dentata (De Haan, 1849) in hermits crab were most dominant.

• Animal Systematics, Evolution and Diversity
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• v.2 no.2
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• pp.67-78
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• 1986

한국해역에서 알려진 집게류는 12과 57종, 게류는 20과 183종이다. 집게류는 집게과 (Paguridae) (19종)와 넓적왼손집게 과 (Diogenidae) (12종) 의 종들이 많고 게류에서는 물맞이게 과 (Maidae) (33종) 의 종이 가장 asg고 다음이 바위게 과(Grapsidae) (29종), 부채게 과 (Xanthidae) (22종), 꽃게 과 (Portunidae) (16종) , 달랑게 과(Ocypodidae) (16종)의 순이다. 저자는 한국 해역을 동해, 대한해협, 제주도해역, 황해의 4구역으로 나누고, 집게류와 게류를 북방형, 온대형, 남방형의 3분지형으로 나누었다. 집게류의 경우 북방형 9종, 온대형 40종, 남방형 8종이고, 게류의 경우 북방형 7종, 온대형 87종, 남방형 89종이다. 집게류의 경우 동행 29종, 대한해협에 30종, 제주도해역에 30종, 황해에 21종이 게류의 경우 위의 순서대로 62종, 121 종, 104 종, 74종이 분포하며, 각 해역에서의 분포형도 고찰했다. 각 해역에만 분포하는 종의 수는 집게의 경우 동해에 8종, 대한해협에 3종, 제주도해역에 16종, 황해에 0종, 게류의 경우 위의 순서로 8종, 20종 40종, 12종이다. 집게류는 북방형종이, 게류는 남방형종이 비교적 많으며 동해에는 북방형종들이 제주도에는 남방형종들이 비교적 많다. 4구역 중 2 구역 (6조합) 사이의 유사계수(r=a/a+b+c)를 계산한 바 양 분류군 모두 대한 해협과 황해 사이의 유사성이 가장 크고 (집게류 ; 0.55, 게류 : 0.59), 제주도해역과 황해 사이의 유사성이 가장 적다. (집게류 ; 0.20, 게류 : 0.19). 분포상을 이해하기 위하여 각 해역의 환경조건도 알아보았는바, 분포의 양상과 해황과 잘 부합된다.

• Korean Journal of Ichthyology
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• v.19 no.4
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• pp.318-323
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• 2007

The feeding habits of Pacific cod (Gadus macrocephalus) were studied based on the examination of stomach contents of 192 specimens collected from November, 2005 to January, 2006 in the coastal waters off Gadeok-do, Korea. The size of Pacific cod ranged from 35 to 82 cm in standard length (SL). Pacific cod mainly consumed shrimps such as Eualus spathulirostris, Crogon hakodatei and C. affinis and fishes. Its diet also included small quantities of cephalopods, amphipods, hermit crabs and crabs. Individuals between 35 cm and 45 cm SL mainly consumed shrimps. The portion of shrimps decreased with increasing fish size, and this decrease was paralleled with increased consumption of fishes and cephalopods. In this study we found Syngnathus schlegeli in the stomach contents of many Pacific cod specimens. S. schlegeli is a typical seagrass fish species which inhabits in seagrass beds, This fact means that Pacific cods stay in the seagrass beds during spawning period. Therefore migration of Pacific cod to coastal waters off Gadeok-do during spawning period seems to be a survival strategy for its larvae and small juveniles to stay in seagrass beds which provide with abundant foods and shelters to many commercial fish species.

• Korean Journal of Ichthyology
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• v.35 no.4
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• pp.325-332
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• 2023

The feeding habits of the Fat Greenling Hexagrammos otakii were studied using 376 specimens (17.4~41.4 cm in total length) collected off the Incheon coast, Korea between March 2020 and February 2021. H. otakii ate mainly gastropoda and teleostei, incuding caridea, brachyura, polychaeta, cephalopoda and amphipoda. The diet composition of H. otakii showed changes in season. H. otakii ate mainly cephalopoda in spring and ate mainly polychaeta in summer. The teleostei feeding rate was highest in autumn, whereas the proportion of gastropoda was higher in winter than in other seasons. The mean number of preys per stomach (mN/ST, One-way ANOVA, F=2.026, P>0.05) and mean weight of preys per stomach (mW/ST, One-way ANOVA, F=1.075, P>0.05) didn't show a statistically significant difference among size classes.