[논문]Survival Strategies of the Rotifer Brachionus rotundiformis for Coexisting with the Copepod Apocyclops borneoensis in Laboratory Culture

Jung, Min-Min

doi:10.5657/fas.2012.0057

Survival Strategies of the Rotifer Brachionus rotundiformis for Coexisting with the Copepod Apocyclops borneoensis in Laboratory Culture 원문보기

Fisheries and aquatic sciences, v.15 no.1, 2012년, pp.57 - 62

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

Abstract ▼ AI-Helper

Interspecific relationship between a euryhaline rotifer Brachionus rotundiformis and a cyclopoid copepod Apocyclops borneoensis was investigated in the laboratory culture. In a mixed culture of B. rotundiformis and A. borneoensis, population growth of B. rotundiformis was suppressed from day 10, while growth in a monoculture population continuously increased throughout the experimental period. However, the population growth of A. borneoensis in the mixed culture did not markedly differ from that in a monoculture population. Suppression of B. rotundiformis growth coincided with a decrease in the numbers of both non-egg-bearing and egg-bearing females, and increasing resting egg formation. Growth of A. borneoensis was not affected by the presence of the rotifer. However, relative growth index of ovisac bearing females in the mixed culture was 1.62 times higher than that in the monoculture. Presence of the copepod did not greatly reduce the food available to the rotifer population. The rotifer B. rotundiformis responded in a unique way, to stresses such as physical damage (filtering by A. borneoensis) with the production of many resting eggs to increase its chances of survival.

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제안 방법

In the monocultures, the numbers of rotifers and copepods were the same as in mixed cultures, but were cultured separately. Mono- and mixed-species cultures were conducted with three replicates for 16 days. Stereo-microscopic observation was carried out on fresh culture medium including Tetraselmis suecica (7 × 10⁵ cells/mL) every two days.
Stereo-microscopic observation was carried out on fresh culture medium including Tetraselmis suecica (7 × 105 cells/mL) every two days.

대상 데이터

Copepods and rotifers were collected from a milkfish pond in Bitung, 30 km east of Manado, North Sulawesi, Indonesia. The pond is separated from the adjacent sea by mangroves, but is connected through an inlet during high tide.

데이터처리

Relative population growths between monocultures of each species and mixed culture conditions were compared by student's t-test.

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DOI : 10.5657/FAS.2012.0057 [무료]
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