In the bustling waters north of Banda Aceh, a pioneering study has shed new light on the fish stocks of Alue Naga, offering a beacon of hope for sustainable fisheries management. Led by Syahrul Purnawan from the Laboratory of Marine Acoustics at Universitas Syiah Kuala, the research employed a 200 kHz single beam echosounder to map the underwater world, providing a comprehensive snapshot of fish distribution and abundance.
The study, published in ‘Ilmu Kelautan’ (translated as ‘Marine Science’), utilized a Simrad EK-15 echosounder to collect hydroacoustic data, which was then processed using Sonar5-Pro software. This method allowed the team to assess fish stocks in a way that was previously not possible in these waters. “The hydroacoustic method effectively provides comprehensive information on the horizontal and vertical distribution of fish,” Purnawan explained, highlighting the significance of the findings.
The data revealed that the volume backscattering strength (SV) was highest in intermediate layers, while the target strength (TS) peaked in deeper waters, reaching a maximum of -49.46 dB at depths of 51–60 meters. The area density of fish was found to be highest at 11-20 meters, with biomass peaking at 21-30 meters, registering an impressive 1558 grams per hectare. These findings suggest a thriving ecosystem with significant potential for fisheries.
For maritime professionals, the implications are substantial. Accurate fish stock assessments are crucial for sustainable fisheries management, ensuring that resources are not overexploited. The hydroacoustic method used in this study offers a reliable and efficient way to monitor fish populations, providing valuable data for policymakers and fishermen alike.
The study also identified several potential reef fish resources, including Carangoides, Selaroides, Aphareus, Variola, and Priacanthidae. This presents commercial opportunities for the fishing industry, as well as potential for ecotourism, given the rich marine biodiversity in the area.
Purnawan’s research underscores the importance of investing in advanced technologies for marine research. As the maritime sector continues to evolve, such innovations will be key to balancing economic growth with environmental sustainability. The findings from Alue Naga waters serve as a testament to the power of hydroacoustic methods in unlocking the secrets of our oceans, paving the way for a more informed and sustainable future.