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- Title
Effect of food composition on egg production and hatching success rate of two copepod species (Calanoides carinatus and Rhincalanus nasutus) in the Benguela upwelling system.
- Authors
Xabier Irigoien; Verheye, Hans M.; Harris, Roger P.; Harbour, Derek
- Abstract
We have analysed the daily egg production (EPR) and hatching success rates of the calanoid copepods Calanoides carinatus and Rhincalanus nasutus as a function of nano- and microplankton concentration and composition in the northern Benguela upwelling system off Namibia. Food concentration explained 55% (R. nasutus) to 62% (C. carinatus) of the EPR variability. We found no relation between the residuals of the food concentration–EPR regression and the percentage of the different taxonomic components of the nano- and microplankton. Nor was there a relation with the proportion of the diatom Skeletonema costatum that dominated the major blooms or with the number of nano- and microplankton species. We conclude that food quality differences could not be attributed to the relative composition of microplanktonic particles of the different groups (i.e. taxonomic composition).
- Subjects
NAMIBIA; COPEPODA; CRUSTACEA; EGG incubation; PLANKTON; UPWELLING (Oceanography); OCEAN circulation
- Publication
Journal of Plankton Research, 2005, Vol 27, Issue 8, p735
- ISSN
0142-7873
- Publication type
Article
- DOI
10.1093/plankt/fbi046