• Journal of Species Research
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• v.12 no.1
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• pp.1-26
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• 2023

A faunal study on Amphipods belonging to the class Malacostraca was conducted 26-29 August 2021 at 12 sites in Chujado Island, Korea. This study found that 68 amphipod species in 39 genera, 19 families were living on Chujado Island. Among these 19 families, the family Caprellidae (20 species) showed the highest abundance. Ampithoidae (7 species) and Dexaminidae (6 species) were subdominant families. The species Stenothoe valida Dana, 1852 (found at 10 of 12 sites) was the most frequent and widespread species. Caprella scaura Templeton, 1836 was identified at 9 of 12 sites and had the highest frequency of appearance among 20 species of Caprellidae. Among the 68 species, Ampithoe waialua J.L. Barnard, 1970 and Melita nagatai Yamato, 1987 are newly recorded species in Korean fauna. These newly recorded species are fully illustrated and compared with related species. We provide an amphipod fauna in Chujado Island with a list, figures, and a table.

• Fisheries and Aquatic Sciences
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• v.26 no.7
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• pp.455-459
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• 2023

40 species of the family Caprellidae Leach, 1814 are recorded in Korean waters. Caprella aino Utinomi, 1943 was newly collected from seaweed farms from the southeastern waters of Korea. C. aino was firstly reported in Japanese waters in 1943. Adults of C. aino and Caprella mutica Schurin, 1935 are easily distinguished in that C. aino have pereonite II and gnathopod II without setae and two small tubercles of articulation of gills in pereonite III-IV, while C. mutica do pereonite II and gnathopod II covered with setae and those of pereonites III-VII with many tubercles. However, subadult C. mutica is hardly distinguishable from C. aino in that tubercles of pereonite III are less developed and they have inconspicuous setae of pereonite II and gnathopod II. Nevertheless, C. aino is distinguished from subadult C. mutica because adult C. aino have dorsal tubercles on pereonite IV, V, VI, VII unlike that of C. mutica. We report C. aino as a new record in Korean water with comparison of C. mutica.

• Animal Systematics, Evolution and Diversity
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• v.18 no.2
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• pp.271-276
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• 2002

From examination of caprellid specimens collected from south coast, Caprella Japonica is found and newly reported from Korea. We redescribe it in detail with figures which show a couple of differences as compared with the previous description from Japan.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.35 no.2
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• pp.105-109
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• 2002

Seasonal variations of species composition and density of caprellids was accomplished in eelgrass beds around Daedo Island, a south coast of Korea. Sampling was performed monthly using an epifaunal sampler at two stations from June 1996 to May 1997, Caprellids were comprised of 6 species belong to a family Caprellidae, Mean density was 402 ind./$m^2$. The numerically-dominant species were Caprella tsugarensis (216 ind./$m^2$) and C. kroeyeri (129 ind./$m^2$). High density was occurred in the early summer, and lows in autumn and winter. The density of caprellids was correlated with the biomass of the eelgrass. Predation pressure by fish was also correlated with the density of caprellids in spring.

• The Korean Journal of Zoology
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• v.34 no.3
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• pp.323-337
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• 1991

This study on the four families (Leucothoidae, Melitidae, Pleustidae, and Stenothoidae) of gammaridean and the one family (Caprellidae) of caprellidean amphipods of Ulreung Island was based on the materials collected at eight localities in Ulreung Island. Ten species of six genera were identified. Of these, he (Elasmopus korrunus, and Muero breuispina) are new to science. Four species (Leucothoe nogotoi, 1. spinicawa, Paropleustes denhouini, and Stenothoe volido) are new records for Korean craters. Five species were described and six Lvere illustrated.

• The Korean Journal of Zoology
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• v.36 no.3
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• pp.353-366
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• 1993

This study on Korean capreilids (Amphipoda, Capreiiidae) was based on the materlais collected from 23 locailties in the coast of the East Sea and the Ulrung Island. 17 species of genus Caprella were identified. Among them, 3 species are newly reported from Korea: Caprella cristibrachium Mayer, 1903, C. linearis (Linnaeus, 1767) and C. mixta Mayer, 1903. 6 species are new records from the East Sea: Caprella brevirostris Mayer, 1903, C. decipiens Mayer, 1890, C. equilibra Say, 1818, C. gigantochir Mayer, 1903, C. tsugarensis Utinomi, 1947 and C. verrucosa Boeck, 1872. As a result, Korean caprellid fauna consists of 5 genera, 30 species.

• Journal of Species Research
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• v.13 no.2
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• pp.159-177
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• 2024

A faunal study on the marine amphipods at eight sites of the continental shelf region in the Southern Sea, Korea was conducted from 16-17 August 2022. In this study, 26 amphipod species in 19 genera and 14 families were found. Among these 14 families, the family Ampeliscidae with six species showed the highest abundance, followed by the family Caprellidae with five species. Amphipods were collected using conical nets, MOCNESS nets, SM grabs, and trawls. When using the SM Grab for collecting benthic sediment, 15 out of a total of 26 amphipod species were surveyed, indicating the highest diversity of amphipod species. Out of the total 26 species, four identified species (Ampelisca pygmaea Schellenberg, 1938; Byblis longiflagelis Ren, 1998; Caprella iniquilibra Mayer, 1903; Primno latreillei Stebbing, 1888) and five unidentified species(Themisto sp., Liljeborgia sp., Dulichiella sp., Cranocephalus sp., Primno sp.) are newly recorded in Korean fauna. These newly recorded species are fully illustrated and compared with related species. We provide a list amphipod fauna in Southern Sea of Korea including figures and tables.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.43 no.4
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• pp.345-350
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• 2010

We studied the organisms attached to Sargassum beds in Gamak Bay from November 2007 to June 2008. The water temperature ranged from 3.3 to $28.7^{\circ}C$ and salinity from 30.6 to 33.8 psu. Eighteen species $143,432\;ind./m^2$ were sampled during study periods. The biomass of the Sargassum beds ranged from a highest of $196.08\;g\;dw/m^2$ in March to a lowest of $0\;g\;dw/m^2$ in July. The major dominant species were Barleeia angustata ($134,430\;ind./m^2$), Caprellidae sp.($2,443\;ind./m^2$) and Gammaridae sp.($4,201\;ind./m^2$). The ecological indices of diversity, evenness, and richness were 0.11-0.86, 0.04-0.39, and 0.74-1.06, respectively.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.19 no.5
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• pp.411-422
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• 1986

Diets of the rock trout, Agrammus agrammus, in the shore area of Tongbaeksom, Pusan over the period of July 1981 to June 1982 were studied. Specimens were sampled by angling. Stomach analysis showed that the rock trout fed mainly on epibenthic food in the littoral zone along the coast of Tongbaeksom. The food organisms of the enviornment were studied by means of underwater sampling around the angling area for this study. Although the food items of the fish changed slightly with season and age-group, main food items were Amphipoda (Gammaridae, Caprellidae) and Isopoda (Sphaeromidae, Idotheidae). This suggests that the diets of A. agrammus mainly comprised epibenthic food. Food diversity increased with age. The fish almost consummed on smaller food in size, but had selective predation according to food size, i. e. on larger food as age increases. These data provide additional support for the importance of the detritus-benthos-consummer type food chain.