Reduced growth of Atlantic cod in non‐lethal hypoxic conditions
Growth in length and mass, improvements in condition, as well as final condition of c. 700 g Atlantic cod Gadus morhua were significantly less at 45% and 56% O 2 saturation than at 65%, 75%, 84% and 93% O 2 saturation. Hypoxia decreased food consumption. In turn, food consumption explained 97% of th...
| Published in: | Journal of Fish Biology |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Wiley
1999
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1999.tb00693.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1999.tb00693.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1999.tb00693.x |
| Summary: | Growth in length and mass, improvements in condition, as well as final condition of c. 700 g Atlantic cod Gadus morhua were significantly less at 45% and 56% O 2 saturation than at 65%, 75%, 84% and 93% O 2 saturation. Hypoxia decreased food consumption. In turn, food consumption explained 97% of the variation in growth. Conversion efficiency varied slightly, but significantly, with level of dissolved O 2 , except that the group reared at 93% O 2 had a lower than expected conversion efficiency. Slow growth in low O 2 was not due to increased activity, because activity decreased in hypoxia. In the Gulf of St Lawrence, waters deeper than 200 m usually are <65% saturated in O 2 , and thus should impact negatively on cod growth. |
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