• Korean Journal of Fisheries and Aquatic Sciences
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• v.2 no.1
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• pp.47-62
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• 1969

A goby, Synechogobius hasta (Temminck et Schlegel) was studied to investigate the food consumed and the biological change of the food organisms, and the fish were sampled from the closed tributary and the lower Part of the Naktong River, near Pusan, during the period from November of 1967 to December of 1968. The fish were sampled from four stations (Fig. 1), the total number of fish being 1,295 and they were grouped and analysed monthly. The content of the alimentary canal was analysed in three categories according to modified Nilsson's method (Dahl 1962) with a slight alteration: 1) The number of each item of stomach contents was counted and the percentage of each item in proportion to the total number of food organisms is indicated by the letter 'N' representing numerical percentage in Table 2. 2) The percentage of fish which contained any items of food organisms in proportion to the total number of fish caught in a given season is indicated by the letter 'O' representing frequency of occurrence. 3) Dominant groups of food items were selected and the percentage of the number of each dominant item in proportion to the number of the food organisms belonging to the dominant groups is indicated by the letter 'D' representing dominance. All food organisms were classified in 50 food item categories and then they were grouped in 13 main groups (Fig. 2-1), and they were further divided into 1) obligatory bottom animals, 2) organic drifts and 3) actively swimming forms; according to the conditions of the animal communities within the habitat. Since the majority of its food was composed of the obligatory bottom animals ($94.6\%$), the fish appeard to be a typical bottom feeder. And the dominant food organisms of the fish is generally determined by the local composition of the benthic fauna within the fish habitat. And their seasonal rhythm occurs among the food organisms in the stomach by the biological interaction. Locality variation in the population of the same food organism occurs due to the difference of food organisms in the habitat of the fish at Seonam and Garak, and at Seongsan and Hadan the condition of the niche for the fish in the both regions seems to be the same since the composition and the seasonal variation of the organisms were the same. The results may be summarized as follows: 1) The goby mainly feed on the animals of bottom fauna, and the food organisms are deter-mined by the food compositions within the habitat. 2) Seasonal variation of the stomach content shows the seasonal rhythm due to the biological variation of the population and their interaction. 3) The goby shows no preference on specific food, and the food is composed of a variety of animals. 4) Major food items of the goby are Polychaeta, Palaemon modestus, Isopoda, Gammaridea, Insecta (nymphs and larvae), Ilyoplax deschampsi, and Paratye compressa. 5) Logitudinal succession oil the population of the food organisms is apparently recognized within the community of Seongsan, Garak and Seonam. 6) The goby begins to descend toward the estuary and sea around April when the water temperature reaches $20^{\circ}C$, and they begin to return to river waters in September.

• Korean Aquaculture
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• v.12 no.1
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• pp.95-99
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• 2000

이번 호에서는 먹이생물 관련 양식 정보 시리즈 여섯 번째로 수산 증양식 분야에서 어린 유생의 먹이로서 이용되는 식물${\cdot}$동물 먹이생물의 배양 방법으로서 배량 배양으로 들어가기 전에 선결되어야 할 단일종 배양, 스트레스 배양 그리고 무균 배양에 대하여 기술한다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.193-194
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• 2000

근래에 들어 어류 양식 분야가 활기를 띠면서 어류 종묘생산에 대한 관심도가 높아지고 있다. 그럼으로 인하여 먹이생물에 대한 중요성이 높아졌고 이에 대응하는 먹이생물의 연구가 많이 이루어지고 있다. 지금까지 먹이생물로 이용되어온 것은 chlorella와 rotifer, artemia 등이며 chlorella와 rotifer는 현재까지 배양하는데 별다른 문제가 없어 이용되고 있으나 artemia는 전세계적으로 생산이 급감하는 추세이며 우리 나라의 경우는 전량수입에 의존하여 국가적 손실이 크므로 이에 대한 대체먹이생물의 개발이 시급한 실정이다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.281-282
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• 2001

미세조류의 배양은 천해양식 생물의 종묘생산 시 먹이생물로서 가장 중요한 요인이 된다. 종묘생산은 친어(brood stock)의 관리와 산란된 난에서 부화된 자ㆍ치어의 사육으로 구분할수 있다. 이때 자ㆍ치어 사육의 근본적인 과제는 적합한 먹이생물의 확보이며 이는 곧 미세조류의 대량배양이라 할 수 있다. 먹이생물이 확보되지 못한 생태에서는 자ㆍ치어 사육은 불가능하므로 천해양식산업에서 미세조류의 배양은 가장 중요한 근본과제이다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.387-388
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• 2001

근래에 들어 어류 양식 분야가 활기를 띠면서 어류 종묘생산에 대한 관심도가 높아지고 있다 그럼으로 인하여 먹이생물에 대한 중요성이 높아졌고 이에 대응하는 먹이생물의 연구가 많이 이루어지고 있다. 지금까지 먹이생물로 이용되어온 것은 Chlorella와 Rotifer, Artemia등이며 Chlorella와 Rotifer는 현재까지 배양하는데 별다른 문제가 없어 이용되고 있으나 Artemia는 전세계적으로 생산이 급감하는 추세이며 우리 나라의 경우는 전량수입에 의존하여 국가적 손실이 크므로 이에 대한 대체먹이생물의 개발이 시급한 실정이다(김 등, 1999). (중략)

• Korean Journal of Fisheries and Aquatic Sciences
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• v.29 no.4
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• pp.450-455
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• 1996

To investigate the food organisms of the shad (Konosirus punctatus) during the postlarval stage, the gut contents of the shad, captured in Kwangyang Bay in June 1990, were observed. The food organisms food items of the shad larvae of $4.8\~5.0mm$ (NL) were copepod eggs and copepod nauplii, whereas those of the larvae longer than 5.0 mm (NL) were copepod nauplii and Tintinnopsis.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.25 no.4
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• pp.160-172
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• 2020

To understand on-site feeding traits of Noctiluca scintillans with unprecedented high abundances around Dokdo in spring, 2014, the composition and abundance of food items in the digestive vacuole of the species were analyzed. Abundances of N. scintillans ranged from 4,328~17,791 inds.m^-3 around Dokdo during the study. The incidence of preyed items in the vacuole of N. scintillans ranged by averaged 32% (24~50%) in the surface waters around Dokdo. Diverse preyed items consisted of fecal pellet, protozoans, pollen, diatoms, dinoflagellates, copepods and ichtyoplankton, while fecal pellets were dominantly fed by N. scintillans (43%) and next by protozoans (19%), pollen (18%), diatoms (7%) and dinoflagellates (4%). Fecal pellet, protozoans and pollen were relatively preferred by N. scintillans compared to diatoms, dinoflagellates and ichtyoplankton based on the incidence in the food vacuoles. Present results indicated that high abundance of N. scintillans found around Dokdo was likely associated with non-phytoplankton items rather than previously well-known diatoms as prey during the study.

• Korean Aquaculture
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• v.14 no.2
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• pp.21-25
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• 2002

• Korean Journal of Fisheries and Aquatic Sciences
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• v.31 no.4
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• pp.567-573
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• 1998

Cold storage of concentrated food phytoplanktons is a useful technique in supplying food organisms for artificial shellfish seed. One month after preservation at $4^{\circ}C$, we have measured survival rate of the concentrated food phytoplanktons, Pavlova lutheli, Isochrysis galbana, Isochrysis aff, galbana and Chaetoceros calcitrans. Thereafter we determined survival rate of oyster lavae fed fresh and concentrated diets and fatty acid compositions of the fresh and concentrated food phytoplanktons. Survival rate of concentrated planktons ranged from $23\%$ to $31\%$ after one month at $4^{\circ}C$. The survival rate of oyster larvae fed cold stored food appeared generally higher than those fed fresh harvested food. Especially, the highest survival rate were found in the larvae fed cold stored concentrated I. aff. galbana. EPA and DHA increased after cold storage and the highest level of DHA was detected in I. aff. galbana. As DHA can role as an important factor in determing nutritional value, it would be better to use concentrated I aff, gaibana kept in cold refrigerator for oyster seed production.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.34 no.6
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• pp.666-671
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• 2001

To investigate the food organisms and feeding selectivity of slimy (Leiognathus nuchalis) during the postlarval stage, the gut contents of the fish, captured in Kwangrang Bay in 1995, were observed. The food organisms in the gut were composed of copepod egg and nauplius, Tintinnopsis spp. and Codonellopsis sp. The indices of relative importance (IRI) indicated that Tintinnopsis spp. was the most dominant food item ($80.6\%$), and copepod nauplius was the next ($18.5\%$). Tintinnopsis spp. was the most favorite food item: it occupied $73.8\%$ of gut contents, though it did $39.2\%$ of microzooplankton in the surrounded water. The composition of copepod nauplius was higher in the larvae shorter than 2.0 mm NL. As slimy larvae grew, the size of food organisms in the gut was not changed, and their number increased, and the selectivity for food items increased.