Free Access

Fig. 3


Download original image

(a) Histograms of sampled raw Sv values from schools (grey bars) and from category “other” (empty bars) for seven echograms associated to fishing hauls with small pelagic fish catches. (b) Histogram of pooled Sv data regardless of category with the Gaussian PDFs fitted by the EM algorithm. The vertical black line at the intersection of the curves represents the optimal −59.4 dB threshold. (c) Posterior probabilities of assigning a given Sv value to each group. The red and green lines in (b) and (c) represent, respectively, the “other” and “schools” categories.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.