Entity

Time filter

Source Type


Tsutsui I.,Japan International Research Center for Agricultural science | Tsutsui I.,King Mongkuts Institute Of Technology Ladkrabang Kmitl | Songphatkaew J.,King Mongkuts Institute Of Technology Ladkrabang Kmitl | Meeanan C.,Shrimp Co culture Research Laboratory SCORL | And 7 more authors.
International Aquatic Research | Year: 2015

The increase in global demand for fishery products has led to a fivefold increase in aquaculture production since 1990. Commercial feed is the highest production cost in intensive aquaculture, and residual commercial feed leads to eutrophication; hence it is important to find a low-cost alternative that has less environmental impact. We investigate the use of the filamentous green algae, Chaetomorpha sp., as a raw feed for giant tiger prawns. The giant tiger prawn, Penaeus monodon was grown in monoculture, and in co-culture with Chaetomorpha sp. to investigate the potential benefits of co-culturing. Five 20-day-old giant tiger prawn juveniles were released in 70-L monoculture and co-culture tanks, and the specific growth rate (SGR) and feed conversion ratio (FCR) were measured after 10 weeks. The final mean body weight of co-cultured prawns was approximately 50 % heavier than that of monocultured prawns. The SGR in co-culture tanks was 4.79 ± 0.08 % day−1, which was higher than that in monoculture tanks (4.14 ± 0.27 % day−1). The FCR was 38.9 % lower in co-culture than in monoculture tanks. The protein content of Chaetomorpha sp. obtained from proximate analysis was almost the same or a little lower than other filamentous green seaweeds; however, the Chaetomorpha sp. has higher fiber and gross energy. These results show that Chaetomorpha sp. has potential for reducing feed costs in prawn intensive aquaculture through co-culturing. © 2015, The Author(s). Source


Tsutsui I.,Japan International Research Center for Agricultural science | Miyoshi T.,Japan National Research Institute of Fisheries And Environment of Inland Sea | Aue-umneoy D.,King Mongkuts Institute Of Technology Ladkrabang Kmitl | Songphatkaew J.,King Mongkuts Institute Of Technology Ladkrabang Kmitl | And 8 more authors.
International Aquatic Research | Year: 2015

The effects of salinity and water temperature on growth and survival of Chaetomorpha sp., one of the green tidal filamentous algae, were investigated. Field surveys revealed that this alga was abundant throughout the year in stagnant coastal waters of central Thailand. Chaetomorpha sp. was found in salinities of 3.4–90.0 and water temperatures of 20.1–40.9 °C. Chaetomorpha sp. biomass fluctuated between 9.2 and 162 kg dry weight in a saline swamp, without significant differences among seasons. The highest mean specific growth rate of approximately, 60 % day−1 was observed in laboratory experimental trials at salinities of 20–30 at 30 °C. Salinity and water temperature significantly affected growth of this alga independently and interactively. Based on these results, Chaetomorpha sp. can easily grow, survive and monopolize in stagnant waters where the salinity and temperature greatly fluctuate because of their euryhaline and eurythermal nature as well as their high growth rate. © 2015, The Author(s). Source

Discover hidden collaborations