Abstract
The sterile Ulva, a green alga, has the potential to grow stably, and is expected to be a resource for feed or food containing various nutrients such as proteins and minerals. Two types of Ulva were isolated from Tokyo Bay and Imari Bay, and these growth rates ［g-dry/m2・d］ were evaluated using a model reactor at Imari. In these experiments, the growth rate of the sterile Ulva lactuca was found to be approximately 11.4 g-dry/m2・d. In addition, a growth rate of 8.1 g-dry/m2・d was also obtained for the Ulva lactuca, which had been repeatedly cultured, and it was found that the Ulva lactuca can be produced in subculture. Furthermore, it was revealed for the first time that Ulva pertusa from Imari Bay can also be continuously cultured for 37 days. From these results, it is believed that the sterile Ulva has the property of being easily cultivated, and there are also species that can be subcultured. Based on these data, we newly proposed a type of efficient sterile Ulva production system using enriched seawater.
