SCALLOP AQUACULTUREBy Sarina Winter

SPECIES CULTIVATED

Patinopecten yessoensis (China, Japan)

Placopecten magellanicus (eastern USA)

Pecten maximus (United Kingdom, France, Spain, Norway)

Agropecten irradians (China)

MARKET VALUE

$15-20 per lb Short shelf life of live scallops = only

available close to cultivation sites Frozen or canned marketed

Global aquaculture production of Yesso scallop

LIFE CYCLE

2 Days 15 Days

50 Days

28 Days

150 Days (spat)

~1cm long~250 μm

LIFE CYCLE

Spat collected from ocean Mesh bags filled with material (ex soft

netlon) are tied to rope in ocean Moved to pearl bag until 3 cm (high

mortality if moved when smaller)

Broodstock Spawning induced by varying water

temperature, increasing water circulation, or by an injection of serotonin.

Post-settlement spat may be further grown in nursery tanks

Then moved to pearl nets

ALTERNATE BREEDING

Just kidding

GROWING METHODS Hanging lanterns: Ear hanging: Pocket nets:

Bottom culture:

FEEDING

Scallops are filter feeders Algae with high protein Phytoplankton (Chaetoceros neogracile,

Isochrysis galbana)

CONDITIONS

Depth: 4-10 m Salinity: 32-34‰ Temperature 4-8 °C (39-46.4 °F) Life span is 10-12 years (Harvested typically at

2-3 years)

FARMING PROS

Scallops don’t need to have food supplied to them

They clean the water as they filter feed There aren’t any diseases or parasites

associated with scallops Many of the nets are collapsible and easy to

store

FARMING CONS

Labor intensive Visual pollution Eutrophication associated with scallop

farming Only the adductor mussel (sometimes roe) is

harvested Availability of reliable seed supply (natural)