One of the most important aims of aquatic hatcheries is availability to mass produce of Daphnia magna as a live food with high nutritional value in the shortest time. In the present study, D. magna fed with two freshwater green algae species, Chlorella sp. and Scenedesmus obliquus, enriched with different dosages of a mixture B group vitamins (0, 0.5, 1 and 2 ml.l) were compared at two stages (...

Between January 2001 and May 2003, 167 stream segments on the islands of Kaua‘i, O‘ahu, Maui, and Hawai‘i were sampled for stream macroalgae and measured for a series of physical and chemical conditions. Conditions ranged more widely than previously reported, which is likely due to the greater diversity of habitats accessed and the year-round sampling representation in this study. Water tempera...

Algal blooms can lead to low dissolved oxygen and fluctuating pH, the toxins produced by some species be toxic aquatic animals. In this study, we assessed potential of ozone nanobubble technology for reducing a diatom species, Nitzschia sp., commonly found in freshwater ponds Hong Kong. This study suggests that at dose 0.025 ± 0.003 ppm was sufficient reduce algae 66.4% within 5 minutes treatme...