1. To assess the distribution and abundance of herring in the Thames Estuary
using a Larsensprat trawl.
2. To obtain an independent estimate of the age structure of the Thames spring
spawning herring stock.
T J Hulme (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Biology and fisheries
Quantity: number of hauls = 25 Description: Larsen sprat trawls in order to assess the distribution and abundance of herring.