Importance of discards of a beam trawl fishery as an input of organic matter into nursery areas within the Tagus estuary.

Examines the importance of discards of a beam trawl fishery as input of organic matter into nursery areas within the Tagus estuary in Portugal. Evaluation of mortality estimates of discards; Amount of fishery discards in the upper part of the Tagus estuary; Mortality rate of the fishes and crustaceans.