- Experimental Ecosystems
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Zooplankton cultivation and prawn seed-production in an artificial ecosystem
Helgoländer wissenschaftliche Meeresuntersuchungen volume 30, pages 230–242 (1977)
Abstract
The cultivation experiments were conducted in two parts: (1) zooplankton cultivation in a heterogeneous system as fundamental research (Experiment I); (2) prawn seed-production in a homogeneous system as applied research (Experiment II). In Experiment I, several types of apparatus were designed in order to study a feedback system for cultivation of zooplankton (Brachionus plicatilis andTigriopus japonicus). A 550-1 round transparent tank was used for reserve culture, A 150-1 zigzag stream unit was made of vinyl plates, and connected with the reserve culture tank. In both cases, the water was re-circulated 20 times a day by an airlift pump. A tower-decomposer tank and two blowing cultivators were specially designed for promoting energy-flow. During a 140-day experiment, total wet weight of feed and harvest were 4817 g of yeast and 4308 g of zooplankton, respectively. The rate of food conversionwas 89.4% in terms of wet weight and 33.6% in dry weight. In Experiment II, a 2500 m3-hatchery tank with movable aerators and airlift circulation systems was contructed to maintain an artificial ecosystem for rearing of the prawnPenaeus japonicus. Feeding rate in the 2500 m3-tank was 10.8% lower than that in the 200 m3-tank, but growth rate in the former was 10.6% higher than in the latter.
Literature cited
Akazawa, T., 1973. Effects of gearing agitator on the seedproduction of prawn. Farm. Fish. Tech. Develop. Res.2, 49–55. (In Japan).
Fujiwara, M., et al. 1976. A method of biological purification of waste materials in hospitals and medical laboratories. Environmental purifications by micro-organisms. Rep. Special Res. Grant, Japan, Minstry Educ. 178–179. (In Japan.).
Hirata, H., 1964. Rearing methods of puffer,Sphaeroides rubripes. Yooshoku1, 34–37. (In Japan.).
—, 1974. An attempt to apply an experimental microcosm for the mass culture of marine rotifer,Brachionus plicatilis MULLER. Mem. Fac. Fish. Kagoshima Univ.23, 163–172.
—, 1975 a. Preliminary report on the photoperiodic acclimation for growth ofChlorella cells in synchronized culture. Mem. Fac. Fish., Kagoshima Univ.24, 1–6.
—, 1975 b. An introduction to the rearing methods of prawn,Penaeus japonicus BATE in Japan. Mem. Fac. Fish. Kagoshima Univ.24, 7–12.
—, & Mori, Y., 1967. Mass-culture of marine rotifer,Brachionus plicatilis, fed the baking yeast. Saibai Gyogyo5, 36–40. (In Japan.)
Kinne, O., 1976. Cultivation of marine organisms: water quality management and technology. In: Marine ecology. Ed. by O. Kinne. Wiley, London3 (1), 19–300.
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Hirata, H. Zooplankton cultivation and prawn seed-production in an artificial ecosystem. Helgolander Wiss. Meeresunters 30, 230–242 (1977). https://doi.org/10.1007/BF02207838
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DOI: https://doi.org/10.1007/BF02207838