Effects of UV-B radiation on embryonic, larval and juvenile stages of North Sea plaice (Pleuronectes platessa) under simulated ozone-hole conditions |
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Authors: | H-U Steeger JF Freitag S Michl M Wiemer RJ Paul |
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Institution: | Institut für Zoophysiologie, Westf?lische-Wilhelms-Universit?t, Hindenburgplatz 55, 48143 Münster, Germany,
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Abstract: | Irradiation with artificial quasi-solar light was used to investigate lethal and sublethal effects of enhanced ultraviolet-B
(UV-B) radiation on eggs, larval and juvenile stages of North Sea plaice. The irradiation experiments resembled a worst-case
scenario with a synchronous occurrence of ozone depletion, sunny weather, and low water turbulence. In eggs, UV-B exposure
increased mortality and induced loss of positive buoyancy. UV-B exposures for 1 or 2 days, according to the weather conditions
in spring, impaired eggs only if UV-B intensities and doses exceeded those under a further 60% ozone loss. In larvae and juveniles,
long-term UV-B exposures during and after metamorphosis affected ventilation rate at normoxia and ventilatory regulation during
hypoxic incubations. Oxygen consumption rates of juveniles were not affected by UV-B irradiation.
Received in revised form: 20 April 2000
Electronic Publication |
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Keywords: | Ultraviolet-B Ozone depletion Flatfish Development Pleuronectes platessa |
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