Economic feasibility of Sarcothalia (Gigartinales, Rhodophyta) cultivation

Studies to develop a technology for Sarcothalia cultivation were carried out based on results of a pilot scale farm. Mature cystocarpic and tetrasporic fronds of Sarcothalia crispata were collected in Chilo island (41 degrees S), southern Chile and sporulated in semi controlled conditions. Frames with nylon and polyfilament of different diameters were seeded and incubated in tanks of 400 l. Small gametophytes attached to ropes were maintained in the hatchery for 3 months before out-planting to the sea. Small fronds were grown in a floating system in the open sea. Plants attained 1.5 cm after 3 months cultivation in tanks in semi-controlled conditions. After out-planting to the sea, frond growth took place mainly during spring and summer. The annual timing of the cultivation and production process is described.