Effects of salinity and feed on growth and survival rate of juvenile payangka (Ophieleotris aporos)

Daud W.P. Rumbewas; Indra R.N. Salindeho; Reni L. Kreckhoff; Deiske A. Sumilat; Jeffrie F. Mokolensang; Sipriana S. Tumembouw

doi:10.35800/jasm.v13i1.60178

Authors

Daud W.P. Rumbewas Master Program of Aquatic Science, Postgraduate Program, Sam Ratulangi University, Manado, North Sulawesi, Indonesia
Indra R.N. Salindeho Aquaculture Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado, North Sulawesi, Indonesia
Reni L. Kreckhoff Aquaculture Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado, North Sulawesi, Indonesia
Deiske A. Sumilat Marine Science Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado, North Sulawesi, Indonesia
Jeffrie F. Mokolensang Aquaculture Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado, North Sulawesi, Indonesia
Sipriana S. Tumembouw Aquaculture Program, Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado, North Sulawesi, Indonesia

DOI:

https://doi.org/10.35800/jasm.v13i1.60178

Keywords:

aquaculture, payangka fish, salinity, growth, survival rate

Abstract

Payangka fish (Ophieleotris aporos, Blekeer) in Lake Tondano belong to the suborder Gobioidea, which generally migrates amphidromously. In its development, this fish is thought to have experienced isolation by a hydroelectric dam, which may have caused this fish to have adapted to fully live in freshwater. In order to understand this fish, hence, this research was conducted, which aimed to determine growth, feed efficiency, feed conversion ratio, and survival rate using different salinity treatments and feed types. This study used juveniles (2-3 cm) with an average weight of 0.2 grams, which were maintained for 50 days. The salinity treatments given were 0, 10, and 20 ppt, as well as artificial feed and silkworm treatments. This study was designed according to a factorial experiment in a completely randomised design. The results showed that absolute growth ranged from 1.44 to 1.97 grams, specific growth was 4.18 to 4.74%, relative growth was 706.98 to 970.79%, feed efficiency value was 52.82 to 57.07%, feed conversion ratio was 0.31 to 0.41, and survival rate was 66.67 to 86.67%. It was concluded that the best condition for forthis fish is at the salinity of 10 ppt and fed by silkworms. In addition, juvenile fish still have amphidromous characteristics where they are able to live and grow in a salinity range of 0 ppt to 20 ppt and are adaptive to artificial feed (pellets) and natural feed (silkworms). This indicates that this fish has the potential to be used in aquaculture, which could help sustain its population in aquatic ecosystems.

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