SEASONAL VARIATION IN LENGTH OF COPEPODIDS AND ADULTS OF DIACYCLOPS THOMASI (FORBES) IN TWO COLORADO MONTANE RESERVOIRS (COPEPODA)

ABSTRACT Total lengths (exclusive of furcal setae) of C1―C5 copepodids and adult Diacyclops thomasi (Forbes) varied nonrandomly on 11 sampling dates in 1984 and 1985 in 2 Colorado montane reservoirs. Total lengths of all stages of D. thomasi in Lake Dillon and those of C1―C4 instars in Green Mountai...

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Bibliographic Details
Published in:Journal of crustacean biology 1989-01, Vol.9 (1), p.67-76
Main Authors: Reed, Edward B., Aronson, John G.
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Autoecology
Biological and medical sciences
Biology
Crustaceans
Cyclopes
Diacyclops thomasi
Freshwater
Fundamental and applied biological sciences. Psychology
Instars
Lakes
Limnology
Natural reservoirs
Plankton
Predation
Protozoa. Invertebrata
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Summary:ABSTRACT Total lengths (exclusive of furcal setae) of C1―C5 copepodids and adult Diacyclops thomasi (Forbes) varied nonrandomly on 11 sampling dates in 1984 and 1985 in 2 Colorado montane reservoirs. Total lengths of all stages of D. thomasi in Lake Dillon and those of C1―C4 instars in Green Mountain Reservoir were inversely correlated with water temperature of the 0-20-m stratum 1 month prior to capture. Older instars in Green Mountain did not exhibit an inverse length-temperature relationship, likely an artifact caused by longevity of the older animals and fluctuating water temperatures. Other unmeasured factors probably influenced the observed cycle of lengths.
ISSN:0278-0372
1937-240X
DOI:10.1163/193724089X00214