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Record #139220:

Competitive trade-off strategies in Arctic Daphnia linked to melanism and UV-B stress / Dag O. Hessen.

Title: Competitive trade-off strategies in Arctic Daphnia linked to melanism and UV-B stress / Dag O. Hessen.
Author(s): Hessen, Dag O.
Date: 1996.
In: Polar Biology. (1996.), Vol. 16(8) (1996)
Abstract: High-Arctic freshwater localities at Ny-Ålesund, Svalbard, were examined for their UV-absorbing properties, depth and presence of melanic or non-melanic morphs of planktonic crustacean Daphnia pulex. Light was measured with spectro-radiometer. No clear relationship between UV transparency and occurrence of melanics was seen. In laboratory melanics grew more slowly. They were more resistant to UV light, suggesting trade-off between this protection and metabolic effort. Frequency of types of morph could serve as indicator of UV stress.
Notes:

Polar Biology. Vol. 16(8) :573-579 (1996).

Keywords: 551.521.63 -- Ultraviolet radiation.
574 -- Ecology.
574.2.043/.045 -- Organisms, influence of physical environment.
595.3 -- Crustacea: Daphnia pulex.
H2 -- Zoology: invertebrates.
(*3) -- Arctic regions.
(*32) -- Svalbard.
SPRI record no.: 139220

MARCXML

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500 ## ‡aPolar Biology. Vol. 16(8) :573-579 (1996).
520 3# ‡aHigh-Arctic freshwater localities at Ny-Ålesund, Svalbard, were examined for their UV-absorbing properties, depth and presence of melanic or non-melanic morphs of planktonic crustacean Daphnia pulex. Light was measured with spectro-radiometer. No clear relationship between UV transparency and occurrence of melanics was seen. In laboratory melanics grew more slowly. They were more resistant to UV light, suggesting trade-off between this protection and metabolic effort. Frequency of types of morph could serve as indicator of UV stress.
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650 07 ‡a574 -- Ecology.‡2udc
650 07 ‡a574.2.043/.045 -- Organisms, influence of physical environment.‡2udc
650 07 ‡a595.3 -- Crustacea: Daphnia pulex.‡2udc
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