Title: Bio-economic analysis of Amblygaster sirm fishery in Sri Lanka.

The coastal fishery of Sri Lanka faces the critical issue of declining productivity, threatening livelihoods and food security. This study aims to assess the sustainability of the Amblygaster sirm fishery, a significant contributor to coastal fish production, by analysing bioeconomic reference points. Data collected from 2000 to 2021 using stratified random sampling and secondary sources from the Ministry of Fisheries and other sources formed the basis of the analysis. Schaefer static approaches were employed to estimate key reference points, including the Fishing Mortality at Maximum Sustainable Yield (FMSY-90631.25 hours), Maximum Sustainable Yield (MSY 65712 Mt), and Maximum Economic Yield (MEY - 31190). The study also estimated the impact of fuel price increases under two scenarios: 50% and 100% increases. The results revealed significant fluctuations in the Maximum Economic Yield of the fishery under both scenarios, indicating a drastic effect on the economic viability of fishing operations. The findings indicate fluctuating Amblygaster sirm production around the MSY threshold. The absence of effective management strategies exacerbates this situation, leading to erratic fish production trends. Recommendations include estimating the Maximum Sustainable Yield (MSY) and Maximum Economic Yield (MEY) for the Amblygaster sirm fishery. It helps in comprehending the resource and economic status of the fishery, allowing the establishment of appropriate input or output limitations. Furthermore, it is recommended to enhance the data collection mechanism, apply an output management system, collaborate with stakeholders, and strengthen monitoring and enforcement procedures in coastal fishing operations to facilitate more effective policy recommendations for the fishery.