DESCRIPTIONS OF THE GULF VII PRO-NET AND MAFF/GUILDLINE UNENCASED HIGH-SPEED PLANKTON SAMPLERS/

Two high-speed plankton samplers (Gulf VII/PRO-NET and MAFF/Guildline) currently in use to sample pelagic eggs and larvae in waters around t he UK are described. Both samplers are modifications of Gulf III type samplers and are capable of being towed at speeds of up to 7 knots (3. 6 m s(-1)). The performance of the samplers (flow rates, degree of clo gging of the nets and sample depth profiles) can be monitored during d eployment. The real-time monitoring packages also provide vertical pro files of temperature, salinity and chlorophyll a fluorescence. Both sa mplers can be constructed in different sizes to suit the vessel from w hich the sampler is deployed and the expected concentration of plankto n in the sampling area.