Academic article

Effects of carbon dioxide exposure on feed intake and gonad growth in the green sea urchin, Strongylocentrotus droebachiensis

Siikavuopio, Sten Ivar; Mortensen, Atle; Dale, Trine; Foss, Atle

Publication details

Journal: Aquaculture, vol. 266, p. 97–101, 2007

Publisher: Elsevier

International Standard Numbers:
Printed: 0044-8486
Electronic: 1873-5622

Open Access: none


The effects of carbon dioxide (CO2(aq)) on gonad growth and feed intake in green sea urchin, Strongylocentrotus
droebachiensis, were examined. Adult sea urchins with a mean (S.D.) live weight of 50.0 (11.2) g were exposed to two levels of
carbon dioxide (CO2(aq)), (1.1 (control) and 18.1 mg l−1), for 56 days at 6.0 °C and 33‰.
Gonad growth was significantly reduced in the high CO2 concentration group compared to the control group. In the high carbon
dioxide treatment, gonad growth was 67% less than the control treatment. Weekly feed intake and total feed consumption were
significantly reduced in the high concentration group. The reduction in gonad growth was attributed to a decrease in feed intake and
impaired feed conversion efficiency. The present study demonstrates that adult green sea urchins show low tolerance to increased
carbon dioxide levels, and are unable to maintain high gonad growth facing such conditions.
© 2007 Elsevier B.V. All rights reserved.