Relationship between osmoregulation and growth patterns of Scylla serrata gonad maturity levels in tapak mangrove waters, Semarang, Indonesia

Abstract Mud crab ( Scylla serrata ) is a species that makes up biodiversity in mangrove areas spread across the coast of archipelago, one which Tugu District, Semarang City has area still relatively good. There need for research to determine viability based on environmental conditions, especially salinity affects osmoregulation and growth mud crabs individually populations. This aims patterns, their effect gonadal maturity level crabs. The was carried out April 17th 2021 at Tapak Mangrove Area, Tugurejo Village, Semarang, Indonesia. object hemolymph osmolarity, carapace width, weight, level, media water quality. method uses descriptive exploratory with correlation analysis. Correlation (r) analysis relationship between two variables, namely value osmotic work maturity. pattern hypoosmotic hyperosmotic osmolarity station 1 ranging from 840-899 mOsm/I H 2 O 857-929 O. Osmotic Work Rate (TKO) 1-40 2-52 negative allometric condition factor stations being more than (K > 1) K exceeding 3 means it not flat. TKG Gonadal Maturity Level linear TKO.