The difference in the level of accumulation and rate decomposition in sediments of organic matter from super-intensive vaname shrimp pond waste in open and semi-closed ocean waters
Muhammad Farid Samawi, Abd Rasyid Jalil, Shinta Werorilangi

Marine Science, Hasanuddin University

Abstract

This paper is based on the results of research related to the accumulation and decomposition of organic waste from super intensive vaname shrimp culture in coastal sediments of South Sulawesi, Indonesia. Data collection was carried out on two different forms of marine waters. The waters in Punaga, Takalar Regency are open waters and semi-enclosed waters in Bojo, Barru Regency. Sampling of water and sediment based on the distance from the pond waste source is 0m, 500m, 1000m and 1500m with 3 replications. The water parameters measured included organic matter, nitrate, phosphate, suspended solids and for the parameters of sediment type and composition of sediment, eH and organic matter. Experiments on the rate of decomposition of organic matter in sediments were carried out using sediment from both locations, by observing changes in the levels of total organic matter, nitrate and phosphate for 5 days. The results obtained indicate that there are differences in the levels of organic matter in the water, in Bojo waters of Barru Regency are higher than that in Punaga water of Takalar Regency. This shows that the coastal waters of Bojo have a higher decomposition capacity. Decomposition rates in sediment from both locations showed the same pattern, namely for organic matter and phosphate decreased after day 4, while nitrate levels were still increasing.

Keywords: accumulation, decomposition, organic matter, sediment, vaname cultivation, South Sulawesi

Topic: Oceanography