Author/Authors :
Tsutsui, Isao Fisheries Division - Japan International Research Center for Agricultural Sciences (JIRCAS), Ibaraki, Japan , Miyoshi, Tatsuo National Research Institute of Fisheries and Environment of Inland Sea, Hiroshima, Japan , Aue-umneoy, Dusit Department of Animal Production and Fisheries - Faculty of Agricultural Technology, Thailand , Songphatkaew, Jaruwan Department of Animal Production and Fisheries - Faculty of Agricultural Technology, Thailand , Meeanan, Chonlada Shrimp Co-culture Research Laboratory (SCORL) - King Mongkut’s Institute of Technology Ladkrabang (KMITL), Bangkok, Thailand , Klomkling, Sirimas Shrimp Co-culture Research Laboratory (SCORL) - King Mongkut’s Institute of Technology Ladkrabang (KMITL), Bangkok, Thailand , Sukchai, Halethichanok Shrimp Co-culture Research Laboratory (SCORL) - King Mongkut’s Institute of Technology Ladkrabang (KMITL), Bangkok, Thailand , Pinphoo, Piyarat Department of Animal Production and Fisheries - Faculty of Agricultural Technology, Thailand , Yamaguchi, Iori Faculty of Engineering - Fukuoka Institute of Technology (FIT), Japan , Ganmanee, Monthon Department of Animal Production and Fisheries - Faculty of Agricultural Technology, Thailand , Maeno, Yukio Fisheries Division - Japan International Research Center for Agricultural Sciences (JIRCAS), Ibaraki, Japan , Hamano, Kaoru National Research Institute of Fisheries and Environment of Inland Sea, Hiroshima, Japan
Abstract :
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.
Keywords :
Cladophoraceae , Euryhalinity , Eurythermy , Algal mat , Mangrove swamps
