Diet composition and quality for Calanus finmarchicus egg production and hatching success off south-west Iceland |
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Authors: | S. Jónasdóttir H. Gudfinnsson A. Gislason O. Astthorsson |
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Affiliation: | 1.Danish Institute for Fisheries Research, Department of Marine Ecology and Aquaculture, Kavalerg?rden 6, 2920 Charlottenlund, Denmark,;2.Marine Research Institute, Skúlagata 4, P.O. Box 1390, 121 Reykjavík, Iceland, |
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Abstract: | Egg production and hatching success of the copepod Calanus finmarchicus was measured during spring and summer in the waters south-west of Iceland. Egg-production rates varied greatly, both temporally and spatially, with highest average rates found at a station with low chlorophyll-a concentrations (0.4 mg m-3). Excluding this high production rate from statistical analysis, the remaining egg-production rates were found to be positively correlated with phytoplankton biomass, as well as with parameters representing healthy phytoplankton condition, food quality and diatom-type fatty acids. Hatching success of eggs was negatively correlated with some saturated and monounsaturated fatty acids related to phytoplankton senescence. |
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