Summary
Female bitterlings (Rhodeus sericeus amarus) were treated with the sexual hormone progesterone at a dose of 170μg/l for 2 weeks. Ovipositors from 1–4 centimetres in length grew out in all females within 24 h. The ovipositors were studied by electron microscopy (SEM, TEM).
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Riehl, R. Effect of progesterone on the formation of the ovipositor in female bitterlings (Rhodeus sericeus amarus BLOCH, 1782) (Teleostei, Cyprinidae). Experientia 37, 954–955 (1981). https://doi.org/10.1007/BF01971774
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DOI: https://doi.org/10.1007/BF01971774