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The Effect of Treflan on Survival of Mud Crab (Scylla Serrata) Larvae

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The Effect of Treflan on Survival of Mud Crab (Scylla Serrata) Larvae
THE EFFECT OF TREFLAN ON SURVIVAL OF
MUD CRAB (Scylla serrata) LARVAE

An Investigatory Project Presented to the Faculty of the Special Science Class
Iloilo National High School
La Paz, Iloilo City

In Partial Fulfillment of the Requirement for the Subject
Research II

Dominic Paul O. Genson
March 2003

THE EFFECT OF TREFLAN ON SURVIVAL OF
MUD CRAB (Scylla serrata) LARVAE

DOMINIC PAUL O. GENSON

Chapter 1
Introduction
Background of the Study

Mud crabs belonging to the Genus Scylla are large portunids with high commercial value. Its culture in the Philippines is a significant source of income for farmers. However, a major constraint to grow-out culture activities is insufficient supply of crablets gathered from the natural habitat. To answer this problem, research on larval rearing of mud crab has been intensified. One of the problems that causes low survival in the larval rearing of mud crab is the occurrence of bacterial and fungal infection. Treflan, a fungicide, has been used to prevent the occurrence of fungal infection in some crustaceans. However, the effect of Treflan on the growth and survival of each larval stage of mud crab has not been investigated. This research about on crabs was conducted because of two reasons. One was to determine the effect of various concentrations of Treflan on the survival of mud crab larvae. The second was to identify the level of Treflan which would be most recommended to use during larval rearing of mud crab. Statement of the Problem and the Hypothesis

This study aimed to determine the effects of Treflan on the growth and survival of mud crab larvae. It specifically sought answers to the following questions: 1. Is Treflan effective in preventing the occurrence of fungal infection? 2. What id the effect of the various concentrations of Treflan on the survival rate of mud crab larvae? 3. Is there significant difference in the survival of mud crab using different amounts
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