A series of plankton surveys were undertaken on charter vessels Gill and
Oceanus in the Blackwater Estuary between 1993-1997 in order to examine
herring larval growth, dispersal and feeding. Samples of fish eggs and larvae,
juvenile fish and mesozooplankton were collected for analysis. Data also
includes associated positional and ancillary data (e.g. surface salinity and
temperature) and estimates of water volumes filtered.