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trophic interactions of calanoid copepods in the Benguela upwelling system. J. Sea Res. 85: 186-196 Tiedemann M., Kloppmann M., Ulleweit J., Gröger J.P., Hagen W. 2014: A spatial analysis of larval fish assemblages [...] Plas A., Louw D., Horaeb R., Hagen W. 2014: Spatio-temporal variability of copepod abundance along the 20° S monitoring transect in the northern Benguela Upwelling System from 2005 to 2011. PLoS ONE 9 (5): [...] from Kongsfjorden (Spitsbergen) for two benthic sympatric invertebrates. J. exp. mar. Biol. Ecol. 329: 20-33 Ramp C., Berube M, Hagen W., Sears R. 2006: Survival of adult blue whales (Balaenoptera musculus)