Gut pigment accumulation and destruction by arctic copepods in vitro and in situ

The results presented here were obtained at six locations during three cruises in 1985 (off the coast of Labrador), 1986 (at the eastern end of Viscount Melbourne Sound) and 1988 (off the coast of Labrador). In situ chlorophyll maximum concentrations were > 7 mu gl super(-1) at depths of between...

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Bibliographic Details
Published in:Marine biology 1992-04, Vol.112 (4), p.583-592
Main Author: HEAD, E. J. H
Format: Article
Language:English
Subjects:
Biochemistry. Physiology. Immunology
Biological and medical sciences
Calanus
calanus finmarchicus
Calanus glacialis
Calanus hyperboreus
Copepoda
Crustacea
Fundamental and applied biological sciences. Psychology
Invertebrates
Marine
Metridia longa
Physiology. Development
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Summary:The results presented here were obtained at six locations during three cruises in 1985 (off the coast of Labrador), 1986 (at the eastern end of Viscount Melbourne Sound) and 1988 (off the coast of Labrador). In situ chlorophyll maximum concentrations were > 7 mu gl super(-1) at depths of between 0 and 30 m in all sampling areas. In feeding experiments copepods attained higher gut pigment concentrations the longer they had been previously starved and higher concentrations when fed in the dark than when fed in the light. Community ingestion rates calculated from changes in particulate chlorophyll were higher than estimates derived from gut pigment data except when copepods had been starved for 24 h. Differences between estimates by the two methods suggested pigment destruction.
ISSN:0025-3162
1432-1793
DOI:10.1007/bf00346176