• Korean Journal of Ichthyology
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• v.19 no.1
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• pp.44-50
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• 2007

The feeding habits of sandfish, Arctoscopus japonicus were studied by examining the stomach contents of 2,115 specimens collected between April 2003 and March 2004 in the East Sea of Korea. The standard length (SL) of the specimens ranged from 9.8 to 22.9 cm. The main prey items of A. japonicus were amphipods, mysids, cephalopods and fishes. They showed ontogenetic changes in feeding habits. Individuals of small size (9~16 cm, SL) fed mainly on small prey organisms such as mysids and amphipods. However, more cephalopods and fishes were consumed with increasing fish size (16~23 cm, SL).

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.34 no.3
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• pp.320-327
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• 1998

The feeding habits of jack mackerel, Trachurus japonicus, collected from the Nakdong River estuary from February 1987 to January 1988 were studied. Jack mackerel(4~15cm SL) was a planktivore which fed mainly on copepods, amphipods and mysids. Its diets included small quantities of decapods, euphausiids, polychaetes, chaetognaths and fish larvae. Paracalanus parvus. Acartia clausi and Calanus sinicus were the three most abundant copepod species found in the stomach contents of jack mackerel. Jack mackerel showed ontogenetic changes in feeding habits. Small individuals of the fish(4~7cm SL) preyed heavily on copepods. However, the portion of copepods in stomach contents decreased with increasing fish size, and this decrease was compensated by an increased consumption of amphipods and mysids.

• Korean Journal of Ichthyology
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• v.25 no.3
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• pp.157-162
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• 2013

The feeding habits of spearnose grenadier (Coelorinchus multispinulosus) were studied using 361 specimens collected from January to December 2005~2006 in the coastal waters off Gori, Korea. The size of C. multispinulosus ranged from 1.5 to 8.5 cm in anal length (AL). C. multispinulosus was crustacean feeder that consumes mainly consumed shrimps and amphipods. Its diet also included small quantities of copepods, mysids, cumaceans, stomatopods, crabs, polychaetes and fishes. C. multispinulosus mainly consumed shrimps in all size classes and seasons except the smallest size class in summer which mainly consumed amphipods. Smaller individuals secondly consumed amphipods, copepods and mysids, and the portion of these prey items in the total diet decreased as body size.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.55 no.3
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• pp.345-352
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• 2022

In this study, the dietary habits of the spinyhead sculpin Dasycottus setiger were investigated based on 156 specimens collected seasonally between May 2018 and February 2019 from the East Sea off the Korean coast. In terms of the weight contribution (%W), the main food items of the spinyhead sculpin were found to be teleosts (33.5%), followed by carid shrimps (13.8%), amphipods (13.3%), cephalopods (12.0%), and polychaetes (7.1%). Dietary analyses based on the weight contribution of different prey taxa in the diet of the spinyhead sculpin revealed considerable variation in the dietary composition in terms of the sampling region and fish size implying intra-specific dietary segregation. The spinyhead sculpin showed a size-related trends in dietary shift from amphipods to carid shrimps and teleosts in northern region, and from carid shrimps and mysids to teleosts and cephalopods in middle eastern coast. Multivariate analyses of dietary changes revealed that the dietary composition of spinyhead sculpin is significantly associated with the sampling site, but not the fish size. Amphipods contributed more to the diets of the northern population, while mysids typified the diets of spinyhead scuplin inhabiting the middle eastern coast, indicating differences in available food resources between the two study regions.

• Animal Systematics, Evolution and Diversity
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• v.28 no.1
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• pp.59-67
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• 2012

The order Mysida Haworth, 1825 consists of four families. Of these, only family Mysidae Dana, 1850 has been reported in Korea. Two opossum shrimps, Nipponomysis calcarata Takahashi and Murano, 1986 and Exacanthomysis japonica Murano, 1991 belonging to the tribe Mysini of Mysidae, are reported for the first time from Korean waters. The present study is the second report of these two species in the world. The illustrations and descriptions of these species are provided herein. As a result of this study, 47 species of opossum shrimps including N. calcarata and E. japonica are now recorded on the mysids in Korean fauna.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.22 no.5
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• pp.351-362
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• 1989

Ecology of Crangon affinis was studied in the Nakdong River Estuary fron June 1988 to May 1989. The growth rate of female was similar to that of male. Size differences, however, were apparent between female and male. Sex ratio varies with season. The major spawning season was from June 1988 to May 1989 except for November 1988. The number of eggs of the largest ovigerous female (35.55mm TL) was over 4,000, while that of the smallest ovigerous female (15.05mm TL) more than 120. The mean number of eggs was 1778. The size of winter eggs is larger than that of the summer eggs. The mean percentage of egg loss from brooding to hatching was $29.06\%$. The rate of egg loss decreases with increasing age. Major component of food organisms includes mysids and polycheates.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.43 no.6
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• pp.756-759
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• 2010

The feeding habits of olive flounder, Paralichthys olivaceus were studied using 126 specimens collected from coastal waters off Taean, Korea from April 2008 to March 2009. The total lengths of P. olivaceus ranged from 16.7 to 40.6 cm. P. olivaceus was a piscivore that consumed mainly fishes. The diet also included small quantities of shrimps, cephalopods, polychaetes and mysids. Although, P. olivaceus mainly consumed fishes of all size classes, some degree of change in diet composition was found; i.e. after fishes, smaller individuals fed more on shrimps, whereas larger individuals consumed more cephalopods.

• Fisheries and Aquatic Sciences
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• v.17 no.3
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• pp.355-360
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• 2014

Two pelagic species Siriella izuensis Murano and Fukuoka, 2008 and Siriella japonica Ii, 1964, are reported for the first time from the Korean waters, together with descriptions and illustrations. S. izuensis can be distinguished from its closest relative, Siriella japonica, by the normal inner flagellum of the antennule of males, as opposed to the swollen proximal part in S. japonica, and by the slightly more distinct tendency of alternate arrangement of spines on the distal third lateral margin of the telson than in S. japonica. S. izuensis and S. japonica differ distinctly from other related species by a combination of the triangular rostral plate, the moderate size of the eyes, the form and arrangement of the lateral spines of the telson, and six or seven graded spines on the distal outer margin of the uropodal exopod. A taxonomical key is given for the genus Siriella from the Korea waters.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.34 no.2
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• pp.191-199
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• 1998

Feeding habits of Lateolabrax Japonicus collected from the eelgrass bed in Kwangyang Bay from January 1994 to December 1994 were studied. L. Japonicus was a carnivore which consumed mainly amphipods (gammarid amphipods and caprellid amphipods), crabs, caridean shrimps and copepods. Its diets included small quantities of fishes, mysids, polychaetes, tanaids and isopods. Three distinct ontogenetic feeding groups were noted : (1) 1~2 cm SL individuals preyed heavily on copepods. (2) 2~15 cm SL individuals preyed heavily on amphipods. (3) individuals over 15 cm SL preyed heavily on crabs, caridean shrimps and fishes. L. Japonicus showed seasonal changes in prey composition. These changes were not caused by seasonal changes in food availability, but by changes in the size composition of L. Japonicus occurred in the eelgrass bed.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.31 no.1
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• pp.37-44
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• 1998

Feeding habits of Pseudoblennius cottoides collected from the eelgrass bed in Kwangyang Bay from January 1994 to December 1994 were studied. Pseudoblennius cottoides was a carnivore which mainly consumed fishes, caridean shrimps, and amphipods. Its diets included small Quantities of tanaids, copepods, isopods, mysids, and polychaetes. It showed ontogenetic changes in feeding habits. Fishes were heavily selected as the body size of P. cottoides increases. Fishes and caridean shrimps were major prey organisms for all seasons.