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Mean (± S.E.) discharge of swarmers (%) two days after initiation of experiments at (a) 11 am and (b) 4 pm. Filaments of Ulva were exposed to 4°C and 25°C FSW and without pre-treatment as a control. After two days, the filaments were wrapped in moist paper, dried, or remained submersed from 7 am for 4 h.
