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During diel observations of spermatogenesis in Chaetoceros curvisetum Cleve, recognizable 4‐ and 8‐celled developmental stages were observed primarily during the daily dark period. The timing of the appearance of recognizable stages, 12–16 h after light period onset, was independent of the photoperiods used (8:16, 12:12, 16:8 h LD).
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Miles Furnas (1985) studied this question.
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