- Hatchery technology has been developed by SEAFDEC/AQD
- Wild or hatchery-bred broodstock spawns spontaneously throughout the year
- Abalone feeds on the seaweed Gracilaria, and the technology for seaweed culture is an easy one
- High demand for juveniles by culturists for grow-out culture
- Less competition being a new aquaculture technology
|Hatchery and nursery
Breeders that are wild or hatchery-bred can be held in flow-through sand-filtered seawater tanks or stocked in floating sea cages. Abalone can spawn spontaneously in captivity throughout the year.
|Stock enhancement and sea ranching
Abalone is ideal for stock enhancement in marine protected areas (MPAs). And if fed artificial diet, the abalone exhibits a green band on its shell, and this band would serve as a marker for monitoring released abalone in MPAs
Hatchery-reared abalone juveniles (35-40 mm) can be grown in cages suspended in tanks, and in floating net cages in sheltered coves. They can grow to a marketable size of 55-60 mm within one year, faster than the temperate species.
Abalone feeds continuously on seaweeds (Gracilaria), or it may be given a formulated diet
|AQD’s Work on Abalone
Spontaneous spawning of wild-caught abalone in the hatchery was achieved in 1994. The following year, SEAFDEC/AQD started producing abalone juveniles in its hatcheries, and because the effort was pioneering, production was no higher that 50 million until 2005 when this skyrocketed to 198 million.
The breakthroughs in abalone R&D at AQD had come rapidly, noted as follows:
1996 – Grow-out in floating sea cages was successfully undertaken
1997 – Abalone life cycle was completed
1998 – Formulated diets for juveniles were developed, and grow-out rearing in tanks successfully achieved
1999 – Formulated diet for broodstock maturation and spawning was successfully tested
2000-2001 – Seed production underwent more refinement, shell-marking method by feeding formulated diet was developed, and mass production of juveniles for culture and stock enhancement was started
2002-2003 – Searanching and stock enhancement begun experimentally, and techniques in abalone grow-out in floating net cage were refined
2004-2005 – Hatchery techniques for the mass production of juveniles were developed, behavioral studies of hatchery-produced juveniles for stock enhancement were conducted, and AQD began a training course on abalone hatchery and grow-out
2006 – Abalone hatchery technology was pilot-tested in a private hatchery in Oton, Iloilo
|Research / News|