1. The Pacific Threadfin
Adrienne Kicker

2. Species Cultured & Economic Importance
Polydactylus sexfilis
Revered by Ancient Kings of Hawaii and still a favorite among Hawaiian’s today
Low annual catches lead Hawaiians to consider aquaculture
Hawaii is the number one state for consumption of seafood in the country.

3. rearing hatchlings Two stage nursery process after hatching
Approx only 30-35% survive cannibalism
Approx 90% survive to juvenile stage
About 6-9 months to rear to market size

4. reproduction in captivity
Females and males are separated until sexually mature
Placed in large tanks covered by shade cloth
Lunar cycle spawn; days after the full moon

5. Production methods
Raceways
Recirculating Tanks
Hawaiian Fish Ponds

6. Production methods Cont...
Offshore Sea Cages
The future?

7. feed and feeding Hatchlings typically kept on high grade fish meal
Adult feed varies- smelt or fish meal
FCR of to 1lb fish

8. Water Chem/ Environment needs
At least 20ppt salinity
D.O. level above 5.0ppm
Proper water flow and aeration are essential in rearing Moi

9. Advantages As extensive or intensive as desired
Relatively easy spawning when provided with access to moon cycle
Fairly short rearing cycle (can be as little as 1/2 year)
Great demand for Moi
Culturally important fish

10. Disadvantages Limited to certain geographical areas
Can be labor intensive
Cannibalism in hatchlings can diminish fish rapidly
Feed can account for 40-50% of cost of rearing fish

11. References
s.htm?ACCN_NO=419650
pdf
erciformes/Polynemidae/Polydactylus- approximans
waii.html
google images