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ID: 233797.0, MPI für Evolutionsbiologie / Ecophysiology
Subitaneous eggs of freshwater copepods pass through fish guts: Survival, hatchability, and potential ecological implications
Authors:Bartholmé, Silvia; Samchyshyna, Laryssa; Santer, Barbara; Lampert, Winfried
Language:English
Date of Publication (YYYY-MM-DD):2005-05
Title of Journal:Limnology and Oceanography
Journal Abbrev.:Limnol. Oceanogr.
Volume:50
Issue / Number:3
Start Page:923
End Page:929
Review Status:not specified
Audience:Not Specified
Abstract / Description:We measured the survival of subitaneous eggs of two calanoid (Eudiaptomus gracilis, E. graciloides) and two cyclopoid (Cyclops abyssorum, Macrocyclops albidus) freshwater copepods after they had been consumed by fish. Unexpectedly, over 80% of the calanoid eggs and 30-59% of the cyclopoid eggs were morphologically intact in fish feces. Subitaneous eggs of E. graciloides showed similar proportions of gut passage as dormant resting eggs. About 70-80% of the calanoid eggs and 35-50% of the cyclopoid eggs released nauplii within 3 d. Hence, a total of 50-70% of the calanoid eggs and 11-29% of the cyclopoid eggs survived ingestion and gut passage. Survival was slightly higher because of shorter gut passage time when the fish had been prefed natural plankton compared with hungry fish. We interpret digestion resistance of subitaneous eggs in copepods as an adaptation to fish predation on egg-carrying females.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Limnologie/Abt. Ökophysiologie
Identifiers:ISSN:0024-3590 [ID-No:1]
LOCALID:2393/S 38382 [Listen-Nummer/S-Nummer]
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