• Animal Systematics, Evolution and Diversity
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• 제31권3호
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• pp.182-190
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• 2015

Two heterotrichid ciliates, Climacostomum virens (Ehrenberg, 1838) Stein, 1859 from brackish water and freshwater, and Fabrea salina Henneguy, 1890 from a solar saltern, were collected in Korea. They are novelly investigated in Korea by means of live observation, protargol staining and nuclear small subunit (SSU) rRNA gene sequencing. Climacostomum virens is characterized by pouch-like body shape, body length of $200-370{\mu}m$ in vivo, conspicuous cytopharyngeal tube, macronuclei ribbon-like shape, and one to four in number, with or without symbiont algae in cytoplasm, 34-66 somatic kineties, 67-113 adoral zone of membranelles, 8-42 peristomial kineties, 24-37 apical membranelles. SSU rDNA sequence size is 1,591 bp and GC contents 48.52%. Fabrea salina is also characterized by scoop-like body shape with proboscis, body length of $190-240{\mu}m$ in vivo, one to two rod-shaped macronuclei, oval micronuclei, grayish green cortical granules, 104-186 somatic kineties, 4-8 preoral kineties, 7-19 peristomial kineties and fragmented paroral membrane. SSU rDNA sequence size is 1,598 bp and GC contents 47.50%.

• Asian-Australasian Journal of Animal Sciences
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• 제17권7호
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• pp.995-999
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• 2004

Fabrea salina is a hypersaline ciliate having importance as a live food source for juvenile stages of aquatic animals including smaller invertebrates. The analysis of this ciliate for proximate and biochemical composition was carried out. The moisture, protein, fat, carbohydrate and ash content of F. salina from natural sources were 86.66$\pm$0.380, 56.66$\pm$0.494%, 36.66$\pm$0.614%, 1$\pm$0.073% and 4$\pm$0.182%, respectively. Gas chromatographic analysis (percent area below the curve) revealed that the presence of oleic acid was higher over other fatty acids in both natural and cultured F. salina. The absolute content of oleic acid was higher in natural (18.91% area) than in the cultured (10.74% area) F. salina. Linoleic and linolenic acids were also among major fatty acids with the percentage area of 16.29 and 14.58, respectively. The number of fatty acids in cultured Fabrea was less as compared to the natural ones and the oleic acid was followed by palmitic acid, palmitoleic acid, linoleic acid and stearic acid.

• Fisheries and Aquatic Sciences
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• 제3권3_4호
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• pp.222-227
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• 2000

Fabrea salina living at salt pond is an interesting ciliate in the research of photobiology and live food for aquaculture. This study was carried out to understand the natural habitat of F. salina at salt pond, which would be a basic biological knowledge for the indoor mass culture of this ciliate. In this research, the water quality as temperature, salinity, dissolved oxygen, and chlorophyll-a was examined with the population density of the ciliate at salt pond. The highest population density of F. salina occurred at 109 ppt and $31^{\circ}C$with 2,390 inds./L in August, and the distribution of the ciliate was positively correlated with salinity, temperature, and chlorophyll­a. Even though F. salina is a very euryharine ciliate, it did not occur at the salinity below 47 ppt in this study. Its reason is able to be explained with the occurrence of many predators as small fish and food competitors as zooplankton living at low salinity of salt pont. While F. salina occurred with Anemia at the same habitat using the same food source, the optimum salinity for the ciliate was a little higher than that of Anemia, and the optimum temperature for the former was a little lower than that of the later. This should be a reason for that these two species have different ecological nich at the same habitat using the same food source.

• 한국수산과학회지
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• 제34권1호
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• pp.32-37
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• 2001

Fabrea salina는 광염성의 크기가 작고 부유성인 섬모충으로 번식률이 높아 rotifer를 대치할 수 있는 새로운 동물먹이생물로 기대되어 왔다. 그러나 본 섬모충의 먹이효율에 대한 보고는 rotifer와 비슷하였다는 긍적적인 결과와 어류자어가 섭취하지 않았다는 부정적인 보고가 있다. 본 연구에서는 이와 같은 상반된 결과를 확인하기 위하여 경기만 염전에서 자연산 F. salina를 채집하여 6 종의 식물먹이생물과 쌀, 보리, 밀 등의 곡식을 이용하여 대량배 양한 후 은어자어에 공급하였다. F. salina의 성장은 식물먹이생물 중에서는 Heterosigma sp.,곡류 중에서는 쌀에서 가장 높은 성장을 보였다. F. salins의 최적 배양 수온은 $33^{\circ}C$이며 $35\~95ppt$ 염분에서의 성장은 차이를 보이지 않았다. Heterosigma sp를 공급할 경우의 적정 먹이농도는 $5\times10^6$cells/mL였고 쌀의 경우는 2.8g/L였다. F. salina를 Heterosigma sp.와 쌀로 각각 배양하여 부화 후 6일이 된 은어 자어에 공급한 결과 사육 3일만에 $96\%$ 이상의 사망률을 보였고 유지효모로 배양한 rotifer, Brachionus plicatilis를 공급한 대조구에 비하여 유의적으로 낮은 생존율을 보였다. 본 연구의 결과 F. salina는 대량배양은 용이하였으나 어류 자어의 먹이생물로 활용하기에는 부적합한 것으로 판단되었다.