The oxygen requirements of three fish species from the German Bight: cod Gadus morhua, plaice Pleuronectes platessa, and dab Limanda limanda

• Published in: Journal of Applied Ichthyology
• Main Authors: Scholz, U., Waller, Uwe
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1992
• Subjects: Gadus morhua
• Online Access: https://oceanrep.geomar.de/id/eprint/42264/; https://oceanrep.geomar.de/id/eprint/42264/1/Scholz_et_al-1992-Journal_of_Applied_Ichthyology.pdf; https://doi.org/10.1111/j.1439-0426.1992.tb00669.x

The survival of cod Gadus morhua, plaice Pleuronectes platessa, and dab Limanda limanda was determined in relation to ambient oxygen saturation at 8° C and 35% m salinity. Mortalit rates were observed in fish exposed to constant oxygen levels for 24h. First mortality occurred around 60 % oxygen saturation in cod and around 30% oxygen saturation in dab and plaice. Below these thresholds mortality increased linearly with decreasing oxygen levels. If cod were infested with 1 or 2 individuals of Lernaeocera branchialis (Copepoda), their tolerance was significantly lower; under such circumstances the incipient lethal oxygen saturation was 66 %.