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A series of experiments testing the effects of seasonality, temperature and photoperiod were carried out to investigate the effects of biotic (gametogenesis) and abiotic factors (temperature and photoperiod) on roe enhancement of Evechinus chloroticus. Urchins were collected and held at 10, 14 and 18 °C and in 6, 12 and 18 h light in three 10-week experiments during spring, summer and winter. Groups...
The effects of roe enhancement on gonad growth and colour, survival, and reproductive development in Evechinus chloroticus were tested in a 27-week experiment. Urchins were collected on 28 July 2006 and held at 14 °C and 12:12 h light/dark in groups of 18 urchins (mean test diameter=92.6±0.5 mm; mean wet weight=316.5±5.5 g) per basket and fed ad libitum a formulated moist feed. The urchins were sampled...
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