Ekosistem mangrove memiliki berbagai manfaat sehingga perlu menghitung nilai jasa ekosistem mangrove untuk meminimalisir kerusakan. tujuan penelitian ini adalah menghitung nilai jasa ekosistem mangrove yang berada di kabupaten tana tidung dengan menggunakan metode effect on production. penelitian ini dimulai pada bulan maret - desember 2020. pengambilan sampel nelayan menggunakan metode purposive sampling dan melakukan wawancara nelayan trammel net dan gill net senangin untuk mendapatkan data perikanan tangkap. analisis dilakukan dengan menghitung nilai manfaat langsung perikanan tangkap. hasil penelitian didapatkan nilai ekonomi perikanan tangkap trammel net adalah rp208.086,92/ha/tahun dan gill net senangin adalah rp677.900,57/ha/tahun. nilai total jasa ekosistem mangrove dari indikator perikanan tangkap trammel net dan gill net senangin sebesar rp885.987,49/ha/tahun. setelah dikalkulasikan oleh luas mangrove sebesar 18.875,91 ha, nilai total manfaat ekosistem mangrove adalah rp16.723.820.126,20/tahun. kata kunci: change in productivity approach, gill nets, nilai ekonomi, manfaat langsung, trammel nets

Mangrove ecosystems have various benefits, so it is necessary to calculate their value to mini¬mize damage. the purpose of this study was to calculate the value of mangrove ecosystem services in tana tidung regency using effect on production method. this research was con¬ducted in march – desember 2020. sample of fishermen were taken using purposive sampling method and interviews with trammel net and senangin gill net fishermen to obtain capture fisheries data. the analysis was carried out by calculating the direct benefit value of capture fisheries. the result showed that the economic value of trammel net capture fisheries was idr 208.086,92/ha/year and senangin gill net was idr 677.900,57/ha/year. the total value of mangrove ecosystem services from the trammel net and gill net capture fisheries indicators was idr 885.987,49/ha/year. after calculating the mangrove area of 18.875,91 ha, the total benefit value of the mangrove ecosystem was idr 16.723.820.126,20/year. keywords: change in productivity approach, gill nets, economic value, direct benefits, trammel nets