Feasibility study and carrying capacity of Lake Batur ecosystem to preserve tilapia fish farming in Bali, Indonesia

Wayan, B.I.; Ngurah Santosa, I.G.; Agung Ayu Ambarawati, I.G.; Ketut, S.I.; Nyoman, S.I.; Nataliya, S.

Авторы: Wayan Budiasa I., Ngurah Santosa I.Gusti, Agung Ayu Ambarawati I.Gusti, Ketut Suada I., Nyoman Sunarta I., Nataliya Shchegolkova
Журнал: BIODIVERSITAS
Том: 19
Номер: 2
Год издания: 2018
Издательство: Society for Indonesian Biodiversity
Местоположение издательства: Indonesia
Первая страница: 568
Последняя страница: 575
DOI: 10.13057/biodiv/d190232
Аннотация: Lake Batur in Bangli District was potential for fishery development up to 5% of the total water area. Currently the lake area used for fishery was only 6.28 ha, leaving the area up to 77.07 ha potential for fishery development. Tilapia (Oreochromis niloticus) was the most abundant fish in the lake. This research aimed to evaluate the financial feasibility of tilapia fish farming with Floating Net Cages (FNC) technology within the lake and to assess its carrying capacity for the tilapia aquaculture. Discounted investment criteria were used to test farm survey data from 30 tilapia fish growers at top three villages which had the largest number of FNC. Six water samples were taken using deep water sampler at three sampling points were analyzed to see a number water chemistry and physics condition. The results showed that economic life of a FNC was financially feasible as indicated by the positive Net Present Value (NPV), Internal Rate of Return (IRR) was greater than 9% and Net Benefit Cost Ratio (Net B/C) was greater than one; and (ii) however the water quality as indicated by value of TDS, NO2, BOD, Total-P, NH3, and P-PO4 exceeded the maximum limit of water quality criteria class II based on Government of Indonesia Regulation No. 82/2001. Thus, FNC should not be more expanded within the lake due to water pollution of the lake. Keywords: Financial feasibility, fish diversity, floating net cages, Lake Batur, water pollution
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Feasibility study and carrying capacity of Lake Batur ecosystem to preserve tilapia fish farming in Bali, Indonesiaстатья

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