Species identification of the observed targets during the acoustic surveys is one of the main challenges. This is especially problematic in the regions where species diversity is high and acoustic returns have similar properties despite large taxonomic differences. The primary method of gathering evidence for size identification and estimation is the use of mid-water trawls. While this method is highly effective, there are conditions where confusion can arise regarding species identification, such as mixed composition of fish species and selectivity. The aim of this project is to develop a video camera observation technique that could improve the species identification of observed acoustic densities during fisheries acoustic surveys. In this method, camera images are collected while the camera is lowered to the bottom at high speed. The first prototypes tested on the commercial fishing vessels showed promising results. The high descent rate captures useful images before avoidance occurs. Although this technique, essentially more practical and less expensive than trawling operations, is still in its early stages, however, with further development and experimentation, it can help to improve the species identification accuracy during acoustic surveys.
|Effective start/end date||1/01/22 → 31/12/22|