GROWTH AND FLESH QUALITY OF SRIKANDI STRAIN TILAPIA (Oreochromis niloticus x aureus) IN MARINE FLOATING CAGES
Srikandi strain is a crossbreed between female Nile tilapia (Orechromis niloticus) and male blue tilapia (Oreochromis aureus). High salinity tolerant on Srikandi strain is potential for marine culture development. However, high salinity medium can affect on growth and fish condition. This research was aimed to evaluate growth and flesh quality of Srikandi strain in marine culture. Srikandi seeds 3-5 cm was daily acclimated with 5 g/L/day up to 30 g/L. Marine floating cages (poly-ethylene) was used in Seribu Islands for six months rearing. Sampling was done at the end of experiment, flesh quality was analyzed in accredited laboratory. Result showed that Srikandi strain growth up to 457.2±97 g on females and 548.2±133.1 g on males with averages of total length are 27.4±2.4 cm on females and 29.6±3.0 cm on males. However, the survival rate is low in the range of 36%. Proximate test showed that protein contain of fish meat is 16.42±0.23%, water content 70.75±3.25 %, ash content 1.61±0.01%, carbohydrates 10.66±3.45% and total fat 0.57±0.04%. The content of omega-3 is 113.1±14.9 mg/100g, omega-6 167.8±62.5 mg/100g, omega-9 180.9±8.4 mg/100g, EPA 5.9±1.8 mg/100g and DHA 9.6±3.8 mg/100g. Growth out Srikandi strain in marine environment capable to produce fillet size tilapia with high nutrient content. Nevertheless, improving salinity tolerance and marine culture technology is needed to increase harvest productivity.
Key words : growth, flesh quality, Srikandi strain, floating cages, marine
Figure 1. Body weight of Srikandi strain in marine floating cages
Table 1. Flesh quality of Srikandi strain on marine floating cages
No |
Parameters |
Average |
Units |
1 |
Energy |
113.8 |
kkal/100g |
2 |
Water content |
70.7 |
% |
3 |
Ash content |
1.6 |
% |
4 |
Fat content |
0.6 |
% |
5 |
Protein |
16.4 |
% |
6 |
Total carbohidrate |
10.7 |
% |
7 |
Omega 9 fatty acid |
180.9 |
mg/100g |
8 |
Omega 3 fatty acid |
113.1 |
mg/100g |
9 |
Omega 6 fatty acid |
167.8 |
mg/100g |
10 |
EPA |
5.9 |
mg/100g |
11 |
DHA |
9.6 |
mg/100g |