Fattening of Mangrove Crab Scylla serrata Fed with Two Different Diets (Stingray and Trash Fish)

Authors : Enraıda IMBUK, Suada İNDANAN, Satra SAİLADJAN, Keriman YÜRÜTEN ÖZDEMİR, Jurmin SARRİ

Pages : 1-9

View : 226 | Download : 301

Publication Date : 2023-06-30

Article Type : Research Paper

Abstract :Fattening of mangrove crab S. serrata has been practiced in the Philippines and is considered ecologically sustainable. Trash fish is one of the best natural foods for fattening crab cultures. Meanwhile, stingray also contains plentiful proteins; however, they are not economically valuable in the southern Philippines, causing them to be discarded by most people owing to their unpleasant taste. Considering this, this study aimed to determine the effects of two different diets on mangrove crab fattening using modified plastic cages in mangroves. The experiment was conducted at Sitio Sindang, Indanan, Sulu, Philippines, for 30 days fattening period. Adult crabs insert ignore into journalissuearticles values(n=12); weighing 100 to 110 grams were reared in modified plastic cages measuring 17 cm x 24.5 cm x 6 cm. Plastic cages were partitioned into six compartments; each contained one crab. Two types of experimental feed, namely: stingray insert ignore into journalissuearticles values(Taeniura sp.); insert ignore into journalissuearticles values(chopped stingray); as Treatment 1 and trash fish insert ignore into journalissuearticles values(Sardinella sp.); insert ignore into journalissuearticles values(entrails of fish and chopped trash fish); as Treatment 2, were given to the experimental crabs. The amount of feed given to the crab was calculated based on the 10% body weight. The result showed that the use of stingrays as a source of feed was significantly higher insert ignore into journalissuearticles values(p>0.05); in the weight of mangrove crabs during the early ten days; however, the superiority disappeared after 30 days. Both treatments did not significantly insert ignore into journalissuearticles values(p<0.05); affect the survival performance of mangrove crabs. In addition, the specific growth rate of Treatment 1 insert ignore into journalissuearticles values(0.25 ± 0.20% day-1); was significantly different than Treatment 2 insert ignore into journalissuearticles values(-0.70 ± 0.27 % day-1); after 30 days. During the experiment, some uncontrollable factors, such as cheliped disintegration, were encountered that may have influenced the outcome, which reduced crab weight. Thus, this study suggests that stingrays might be useful as a source of food for the fattening of mangrove crab S. serrata. However, future studies are needed to validate the study’s results.
Keywords : Fattening, mangrove crab, modified plastic cage, Scylla serrata