Study of Ectoparasite Prevalence and Intensity on Mud Crab (Scylla serrata) in Mangrove Area of Wonorejo Surabaya

Selobing Purna,Dian Sari Maisaroh,Misbakhul Munir

doi:10.29080/mrcm.v2i1.1121

Selobing Purna, Dian Sari Maisaroh + Show 1 more

Open Access

https://doi.org/10.29080/mrcm.v2i1.1121

Copy DOI

Abstract

This study aims to know various types, prevalence, and intensity of ectoparasite on mud crab (Scylla serrata) in Mangrove Forest Wonorejo, Surabaya. This study used survey method with random sampling to collect the data. This study was conducted in November 2020. Ectoparasite in this study collected by smear method. In-situ water quality measurement were applied in this study. Mud crab (Scylla serrata) in this study was obtained from local fisherman that consist of 30 crabs. There are 3 types of ectoparasite was infected mud crab there are Octolasmis sp. (208 ind), Zoothamnium sp. (93 ind), dan Epistylis sp. (116 ind). Those ectoparasite was found in mud crabs gills. The highest prevalence was Octolasmis sp. (70%), Epistylis sp. (30%), Zoothamnium sp. (23%). The highest intensity was Zoothamnium sp (13,29 ind/crab), Epistylis sp. (12,89 ind/crab), dan Octolasmis sp. (9,90 ind/crab). Based on Ministerial Decree of Ministry Environment and Forestry No. 1 of 2004 water quality in Wonorejo Mangrove Forest was still optimal for life cycle of mud crab with average of temperature is 31,20°C, Dissolved Oxygen 5,53 mg/l, salinity 11 ppt, and pH 7,40.

Highlights

Mud crab (Scylla sp.) is a crab that spread in tropical and subtropical areas in the Indo-West Pacific region
There are four species of mud crab can be found in Indo-West Pacific, there are Scylla serrata, Scylla tranquebarica, Scylla olivacea and Scylla paramamosain
Scylla serrata is mostly found in the Indo Pacific region while Scylla tranquebarica can generally be found in the South China Sea region and lives in association with Scylla olivacea

Summary

Introduction

Mud crab (Scylla sp.) is a crab that spread in tropical and subtropical areas in the Indo-West Pacific region. There are four species of mud crab can be found in Indo-West Pacific, there are Scylla serrata, Scylla tranquebarica, Scylla olivacea and Scylla paramamosain. Scylla paramamosain is very often found in continental regions of the South China Sea to the South Java Sea. The four mangrove crab species are associated with another species in the same geographic area [1]. To fulfill the supply of mangrove crab commodities in Indonesia generally rely on catches in nature. One of the mangrove ecosystems used to catch mud crab is Wonorejo Mangrove Forest. The Wonorejo Mangrove Forest area has a good quality habitat for the growth of mud crab [3]. Food and Agricultural Security Service (DKPP) of Surabaya recorded total crab production in Surabaya in 2016 has reached 526.90 tons

Objectives

Methods

Results

Conclusion