Stock assessment and data management

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Revision as of 15:21, 2 February 2015 by Gianpaolo.coro (Talk | contribs) (Seasonality and periodicity detection)

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Overview

Stock Assessment

Length-Weight relation

Vessels Transmitted Information

Vessels Trajectories Interpolation

Seasonality and periodicity detection

An algorithms applying signal processing to a time series of catch statistics. The process uniformly samples the series, then extracts hidden periodicities and signal properties. The sampling period is taken as the shortest time difference between two points. Finally, by using Caterpillar-SSA the algorithm forecasts the Time Series. The output shows the detected periodicity, the forecasted signal and the spectrogram. One experiment using this technique to predict fishing activity in the Indian Ocean is available here.