~ 351 ~ International Journal of Fisheries and Aquatic Studies 2020; 8(3): 351-354 E-ISSN: 2347-5129 P-ISSN: 2394-0506 (ICV-Poland) Impact Value: 5.62 (GIF) Impact Factor: 0.549 IJFAS 2020; 8(3): 351-354 © 2020 IJFAS www.fisheriesjournal.com Received: 01-03-2020 Accepted: 03-04-2020 Muhammad Yusri Karim Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, Indonesia Hasni Y Azis Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, Indonesia Khairul Amri Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, Indonesia Nurfadilah Faculty of Fisheries, Cokroaminoto University, Makassar, Indonesia Corresponding Author: Muhammad Yusri Karim Faculty of Marine Sciences and Fisheries, Hasanuddin University, Makassar, Indonesia Survival rate, growth and biochemical composition of mangrove crab body (Scylla olivacea) cultured with various silvofishery systems with pen culture models Muhammad Yusri Karim, Hasni Y Azis, Khairul Amri and Nurfadilah Abstract Silvofishery of mangrove crab culture is one of aquaculture activities in the mangrove area using pen culture. The aim of this study was to find the best model for survival, growth and chemical composition of the body of mangrove crabs (Scylla olivacea). The container used an embedded cage made of bamboo. Tested crabs used had 155 ± 10g weight. A randomized block design consisting of 4 treatments namely: triangles, rectangles, pentagons, and circles. It is proved that different culture model had a very significant effect (p<0.01) on survival, growth and chemical composition of the mangrove crabs. The best survival rate was produced in the pentagon and circle models, while the best crab body chemical composition was produced in the circle model and the body chemical composition was 46.67% of protein, 13.12% of fat, and energy of 3.883 Kcal/g). Keywords: Mangrove crabs, pen culture, growth, survival, body chemical composition 1. Introduction Silvofishery is one of the models of aquaculture activities in mangrove areas. The basic principle of this cultivation system is the multiple uses of mangrove areas without eliminating the natural function of the ecosystem, in order to obtain fishery and mangrove products that can still play a biological, ecological and economic function [1-4] . The ratio between the maintenance area and mangrove vegetation is 1: 5.5, that is 1 part for cultivation purpose and 5.5 parts for vegetation. Various types of aquatic biota may be cultivated with silvofishery systems. One of them is mangrove crab. Mangrove crab is an important economically valuable fishery commodity, that has high nutritional value, and is preferred by consumers. Mangrove crabs belong to the genus of Scylla, which consists of four species i.e. Scylla serrata, S. tranquebarica, S. paramamosain, and S. olivacea which are widely distributed throughout the coastal zone of the Indo-Pacific region [5, 6] . Currently, crab is cultivated within ponds using a variety of technologies and cultivation containers. Generally, there are two types of systems for laying mangrove crab culture containers, namely the pen culture (bottom confinement) and floating cages (bottom-free brackets) [7] . Mangrove crab silvofishery system with pen culture in the mangrove area is a crab culture system by sticking a cage in the bottom of mangrove area. One factor influencing the success of silvofishery of mangrove crab culture using pen culture is the pen culture model used. The form of pen culture will affect the behavior and activity of crabs because there are angles that can limit the movement and activity of the crabs. The difference in the pen culture model as a container for maintaining mangrove crab silvofishery systems is thought to result in the survival, growth and biochemical composition of different crab bodies. Therefore, in order to produce maximum and high-quality crab culture production, an appropriate pen culture model is needed. To find the right pen culture model for maintaining of silvofishery mangrove crabs in mangrove areas, research is needed. This study was aimed to find the best pen culture model for survival, growth, and biochemical composition of the body of mangrove crabs (S. olivacea) maintained by the silvofishery system.