Scallop Aquaculture
description
Transcript of Scallop Aquaculture
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)