Nutrition & Health

Pond Culture of Mud Crab Scylla serrata (Forskal) Fed Formulated Diet With or Without Vitamin and Mineral Supplements

Abstract

 

The effects of three diets (Diet 1 – with vitamin and mineral supplements, Diet 2 – with- out vitamin and mineral supplements, and Diet 3 – fish bycatch) and monosex culture (male or female) on the growth, survival, feed conversion ratio (FCR), and production of mud crab Scylla serrata were investigated using a 2 x 3 factorial experiment with three replicates per treatment. Juvenile mud crabs were stocked at 1.0·m-2 in 150 m2 ponds and reared for 156 days. Results showed no significant interaction between monosex culture and diets (P > 0.05) so that data were pooled by sex and dietary treatment. Mean final body weight of male crabs (427 g) was significantly higher (P < 0.05) than female crabs (400 g). However, crab carapace length (CL) and width (CW), specific growth rate (SGR), FCR, survival, and production were not significantly different (P > 0.05) between the two sexes. Regardless of sex, crabs fed fish bycatch (Diet 3) gave significantly higher (P < 0.05) mean body weight (435 g) than those fed Diet 2 (395 g). Mean final body weight (410 g) of crabs fed Diet 1 was not significantly different from those fed Diets 2 or 3. The CL and CW, SGR, FCR, survival, and production of mud crabs fed the three diets, however, were not significantly different (P > 0.05). The economic viability of using a diet without vitamin and mineral supplements was comparable to that of a complete diet having about the same cost of production and return on investment of 74 to 75%. The study shows that cost-effective formulated diet could be used as alternative feed for fish bycatch thus saving on feed and storage costs.

 

Keywords

Mud Crab Scylla serrata, formulated diet    

 

Author(s)

 

A.T. Trino and O.M. Millamena, Aquaculture Department, Southeast Asian Fisheries Develoment Center Tigbauan, Iloilo Philippines

C.P. KEENAN, Bribie Island Aquaculture Research Center P.O. Box 2066, Bribie Island Queensland 4507 Australia

 

Publication

 

Asian Fisheries Science 14 (2001): 191-200 Asian Fisheries Society, Manila, Philippines 

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