A Saprobic Index for quality of Minapadi Water and the Fish Osmotic Performance Level of Minapadi

¹ Doctor of Environmental Science, School of Postgraduate Studies, Diponegoro University, Semarang, Indonesia
² Faculty of Fisheries and Marine Science, Diponegoro University, Semarang, Indonesia
³ National Research and Innovation Agency, Jakarta, Indonesia

^* Corresponding author: zaenal.arifin.siregar@brin.go.id

Abstract

Ending hunger is one of the Sustainable Development Goals (SDG) that must be achieved to achieve prosperity. The supply of these food needs connects with human dwelling requirements. Numerous technologies have been developed to solve these difficulties. One of these technologies is minapadi, which uses land effectively. For sustainability objectives to be realized, using such technology must preserve environmental quality. This research intends to assess changes in water quality resulting from the usage of minapadi, as well as fish osmosis performance in minapadi. This research is performed to determine the effect of minapadi technology on water and fish. Samberembe Sleman is the location that has been adopting minapadi for a long time and is the Food and Agriculture Organization of the United Nations (FAO) pilot site. In order to acquire data for use in computing the Tropic Saprobity Index, the minapadi water of Samberembe was collected monthly for four months during the study. Blood samples from tilapia (Oreochromis niloticus) were collected in the fourth month to determine osmotic performance levels. The acquired findings have the highest SI value of 0.986 and the lowest SI value of 0.968. The state of β (meso/oligo saprobik) has the highest TSI value with a value of 1.011, while the state has the lowest TSI value with a value of 0.995 β (meso saprobik). Iso-hyperosmotic is the pattern of osmoregulation in tilapia (Oreochromis niloticus) in minapadi. Stable SI and TSI levels at Minapadi do not fluctuate. This result suggests that the water quality is with lightly contaminated water, yet the TSI value indicates that the water is fertile and potable. The normal condition of fish in minapadi indicates that the use of minapadi does not affect environmental conditions.