High tolerance of Chaetomorpha sp. to salinity and water temperature enables survival and growth in stagnant waters of central Thailand

Isao Tsutsui,Yukio Maeno,Jaruwan Songphatkaew,Iori Yamaguchi,Sirimas Klomkling,Piyarat Pinphoo,Tatsuo Miyoshi,Monthon Ganmanee,Kaoru Hamano,Dusit Aue-Umneoy,Chonlada Meeanan,Halethichanok Sukchai

doi:10.1007/s40071-014-0092-4

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.

Highlights

The effects of salinity and water temperature on growth and survival of Chaetomorpha sp., one of the green tidal filamentous algae, were investigated
We demonstrate the reason for monopoly of this species in stagnant environments with a wide range of salinity and water temperature
Plants formed entwined spongy mats lying loosely on the bottom and frequently grew upwards as long interwoven strands covering the water surface (Fig. 3). This alga was found in water with salinity and water temperature ranges of 3.4–90.0 and 20.1–40.9 °C, respectively (Fig. 4a)

Summary

Introduction

The effects of salinity and water temperature on growth and survival of Chaetomorpha sp., one of the green tidal filamentous algae, were investigated. Was found in salinities of 3.4–90.0 and water temperatures of 20.1–40.9 °C. Salinity and water temperature significantly affected growth of this alga independently and interactively. Can 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. Ganmanee Department of Animal Production and Fisheries, Faculty of Agricultural Technology, King Mongkut’s Institute of Technology Ladkrabang (KMITL), Bangkok, Thailand. Sukchai Shrimp Co-culture Research Laboratory (SCORL), King Mongkut’s Institute of Technology Ladkrabang (KMITL), Bangkok, Thailand

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Conclusion