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          Institute: MPI für Evolutionsbiologie     Collection: Ecophysiology     Display Documents



ID: 119837.0, MPI für Evolutionsbiologie / Ecophysiology
The seasonal pattern of lipids in the life cycle of the summer-diapausing freshwater copepod Cyclops kolensis (Lilljeborg).
Authors:Santer, B.; Boldt, E.
Language:English
Date of Publication (YYYY-MM-DD):1998
Title of Journal:Archiv für Hydrobiologie, Advances in Limnology
Journal Abbrev.:Arch. Hydrobiol. Spec. Issues Advanc. Limnol.
Volume (in Journal):52
Title of Issue:Evolutionary and ecological aspects of crustacean diapause
Full Name of Issue-Editor(s):Brendonck, Luc; De Meester, Luc; Hairston, Jr., Nelson
Start Page:477
End Page:492
Physical Description:X, 561 p.
Name of Conference/Meeting:Diapause in the Crustacea - with invited contributions on non-crustacean taxa
Place of Conference/Meeting:Gent
(Start) Date of Conference/Meeting
 (YYYY-MM-DD):
1997-08-24
End Date of Conference/Meeting 
 (YYYY-MM-DD):
1997-08-29
Copyright:Jahrbuch 1999, Copyright MPG 1999
Review Status:not specified
Audience:Not Specified
Intended Educational Use:No
Abstract / Description:The life cycle of the freshwater copepod Cyclops kolensis in the eutrophic Lake Schierensee is characterized by summer diapause. From June to October C4 and C5 copepodid stages persist in the anoxic sediment. Prior to diapause lipids are accumulated. The seasonal patterns of the total lipids and energy reserve lipids in Cyclops kolensis were examined during a two-year period, and the role of the reserve lipids in the life cycle of the copepod was assessed. Triacylglycerols (TAGs) were the dominant lipid class. The seasonal pattern of this energy reserve lipids resembled the seasonal pattern of the total lipids. Total lipid content of diapausing copepodids was approximately one third of their dry mass and decreased only slightly during the diapause period. A drastic decrease of lipids occurred after termination of diapause in November when copepodids emerged. When egg production started in February, the lipid content of adult females was approximately 20 % of their dry mass. During the four-month long reproductive period a decrease in the lipid content of the females was observed, whereas the lipid concentration of the eggs remained almost constant. The offspring developed during the algal spring bloom and accumulated lipids before they entered diapause in June. Stored lipids are considered to provide energy for reactivation of the copepodids after termination of diapause and for early reproduction.
External Publication Status:published
Document Type:Conference-Paper
Version Comment:1478
Affiliations:MPI für Limnologie/Abt. Ökophysiologie
Identifiers:ISBN:3-510-47054-0 [ID-No:1]
ISSN:0071-1128 [ID-No:2]
LOCALID:1741/S 37385 [Listen-Nummer/S-Nummer]
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