Note on estimating krill abundance from acoustic data on individual aggregations
Abstract / Description:
The fundamental equations and assumptions underlying estimation of krill abundance using echo-integration information and aggregation parameters are briefly described. The chief differences of the two approaches are highlighted. It is concluded that the echo-integration approach is superior for the estimation of regional krill abundance and its variance since it is easier to apply, requires less data analysis and does not require any assumptions concerning aggregation distribution or conformation.