Fishery Investigations, Volume 22,Edição 7

age composition age groups annual egg production Aurich Bight spawning area Borkum area Brown Ridge Buchanan-Wollaston Catch per Haul coast contours counterweight Cruise daily egg production December Depth of Water distribution of group drift eastern English Channel Egg Stages IA eggs and larvae eggs per m² estimate F Imm F Mat figures Flamborough area GEORGE BLIGH group I eggs Haul Egg Stages Helgoland Hensen IA IB II Larvae Larvae Post Larvae Post Larvae March mature fish mature plaice Mean per Station Moray Firth number of eggs nursery grounds obtained older fish peak spawning plaice egg surveys plaice spawning plankton PLATESSA Position Day Station position of spawning sampling sex ratio SIR LANCELOT Southern Bight spawning southern North Sea spawners spawning females spawning fish spawning period spawning plaice Stages IA IB Straits of Dover Temperature C Salinity Water filtered fm Water fm Wind Sea XI XII year-class younger fish