Effects of Temperature, Light Intensity, Salinity and Source of Nitrogen on the Growth, Total Lipid and Fatty Acid Composition of Ulva pertusa Kjellman (Chlorophyta)
- E. Floreto, H. Hirata, S. Ando, S. Yamasaki
- Biology
- 1993
Interaction between temperature, light intensity and nitrogen source was the highest source of variation in SGR at the beginning of culture, while salinity and salinity-light intensity interactions were the most limiting factors during the later part of culture.
Stress response and energy metabolism in various tissues of Nile tilapia Oreochromis niloticus exposed to hypoxic conditions.
- Y. Ishibashi, Hideaki Ekawa, H. Hirata, H. Kumai
- Biology, Environmental Science
- 1 December 2002
Results indicate that the stress response to hypoxic conditions is induced markedly with the decreased RF and it is suggested that the decreased energy status in the liver and kidney of tilapia occurs at the same stage as the metabolic depression in the whole body, without increases in the aerobic and anaerobic metabolisms.
Effect of Salinity on the Growth and Fatty Acid Composition of Ulva pertusa Kjellman (Chlorophyta)
- E. Floreto, H. Hirata, S. Yamasaki, S. Castro
- Biology
- 1994
Changes in the specific growth rate and fatty acid composition of Ulva pertusa were observed at various salinities (20, 25, 3O, 35 and 40‰), in a completely randomized laboratory experiment. Specific…
CO2 concentration change in Nannochloropsis sp. culture medium
- S. Yamasaki, H. Hirata
- Environmental Science
- 1995
Probiotic culture of the rotifer Brachionus plicatilis
- H. Hirata, O. Murata, S. Yamada, H. Ishitani, M. Wachi
- BiologyHydrobiologia
- 2004
PCM is useful as food for rotifer culture if it is supplied at a satisfactory concentration and determined the optimal levels for feeding B. plicatilis cultures by providing a starter culture of 100 rotifers different concentrations of PCM and monitoring their population growth over five days.
Influence of Light Intensity on the Fatty Acid Composition of Ulva pertusa Kjellman (Chlorophyta)
- E. Floreto, H. Hirata, S. Yamasaki, S. Castro
- Biology
- 1 November 1994
Changes in the fatty acid composition of the green seaweed, Ulva pertusa, in response to irradiance, and to the natural photoperiod were investigated, suggesting a role as components of photosynthetic membranes.
Optimum Feeding Rate of the Rotifer Brachionus plicatilis on the Marine Alga Nannochloropsis sp.
- A. Ahmad, Shigehisa Yamasam, H. Hirata
- Environmental Science
- 1 December 1991
It was suggested that the feeding rate should be controlled to lower than the saturated value for an efficient mass culture.
DIURNAL RHYTHM OF THE FEEDING ACTIVITY OF GOLDFISH IN WINTER AND EARLY SPRING
- H. Hirata
- Environmental Science
- 1 August 1957
Fatty Acid Composition of Ulva pertusa Kjellman (Chlorophyta) and Gracilaria incurvata Okamura (Rhodophyta) in Japanese Coastal Waters
- E. Floreto, H. Hirata, S. Ando, S. Yamasaki
- Biology
- 7 August 1993
Temperature and daylength were not regarded as completely distinct environmental factors because of their highly significant correlation during the period of study (r 2 = 0.91, p < 0.003).
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