[논문]Biological Application of Two Protozoan Species, Euplotes sp. and Vorticella sp., for the Stable Culture of the Rotifer Brachionus rotundiformis in Laboratory Experiments of Inter- and Tripartite-Specific Relations

Jung, Min-Min

doi:10.5657/fas.2012.0209

Biological Application of Two Protozoan Species, Euplotes sp. and Vorticella sp., for the Stable Culture of the Rotifer Brachionus rotundiformis in Laboratory Experiments of Inter- and Tripartite-Specific Relations 원문보기

Fisheries and aquatic sciences, v.15 no.3, 2012년, pp.209 - 213

Jung, Min-Min (Future Aquaculture Research Center, National Fisheries Research and Development Institute)

Abstract ▼ AI-Helper

Members of the ciliate group of protozoans are often observed in mass cultures of rotifers. In particular, Euplotes and Vorticella are common contaminating species. In this study, I examined the effect of the ciliates Euplotes sp. and Vorticella sp. on the growth of the rotifer Brachionus rotundiformis by conducting inter-specific and tripartite-specific mixed-culture experiments. The growth of rotifers was suppressed in co-existence with Euplotes sp. compared with monocultures of rotifers. However, Vorticella sp. promoted rotifer growth. Moreover, Vorticella sp. improved the growth of rotifers suppressed by Euplotes sp. contaminants. In 5-L semi-mass cultures of rotifers, growth of the contaminating protozoan Euplotes sp. was heavily suppressed by Vorticella sp. The stable maintenance of the rotifer culture ecosystem can be achieved by manipulating the types of contaminating protozoan species.

주제어

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제안 방법

The experimental culture periodwas 30 days. Every 6 days, the number of test organisms in three, 4-mL sub-samples per culture tank was counted for both experiments. After counting, all zooplankton species were returned to the experimental culture tanks.
Semi-mass cultures were maintained in 30-L polycar-bonate round tanks with 5 L of culture water. Two types ofculture water were used in the experiments: sterilized sea water diluted with distilled water for the small-scale experiment and natural sea water diluted with tap water for semi-mass cultures. In the 5-L semi-mass cultures, the formula for natural culture water (natural sea water diluted with tap water) followed the culture methods used in mass culture at sea farming centers.

대상 데이터

The test rotifer was B. rotundiformis of the Koshiki strain (Fig. 1A). The two most frequently observed contaminant protozoan species, Vorticella sp.

데이터처리

Results were analyzed using t-tests with a 95% confidence level.

참고문헌 (12)

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Hagiwara A, Jung MM, Sato T and Hirayama K. 1995. Interspecific relations between marine rotifer Brachionus rotundiformis and zooplankton species contaminating in the rotifer mass culture tank. Fish Sci 61, 623-627.

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