Histopatologi Jaringan Insang Ikan Betok (Anabas testudineus Bloch,1792) Akibat Paparan Logam Berat Kromium (Cr) DI Sungai Desa Geluran Kabupaten Sidoarjo

Abstract

Kromium (Cr) is one of the heavy metals, kromium in nature has valence (Cr 3+) and valence (Cr 6+). Cr 6+ is more toxic than Cr 3+ , because it is easily soluble in water. The impact of kromium on aquatic organisms can disrupt the body's metabolism due to the obstruction of enzymes in physiological processes. This study aims to determine the levels of kromium and determine the effect of kromium on the histpathology of the gill, intestine, and liver tissue of Betok fish in the Geluran Sidoarjo River Village. This research was taken from December 2020 to April 2021. The method used in data collection is a purposive sampling meth where point 1 is before waste disposal, point 2 is close to waste disposal and point 3 is at the confluence of water after waste disposal with other water flows. The number of fish samples used for histological preparations was 3 at each station. The results of kromium analysis obtained results at points 1, 2 and 3 each ranging between 0.001-0.004 ppm; 0.013,-0.028ppm and 0.011-0.021ppm. The results of histopathological analysis of the gill tissue of fish organs at the first point were found to be in the form of hyperplasia, at the second and third points there was lamella fusion.