molluscan aquaculture in atlantic canada
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Molluscan Aquaculture in Atlantic Canada. Need for Aquaculture. The need for food around the world is always increasing Fish stocks are declining - New resources need to be developed Growing and caring for aquatic organisms for the purpose of food production

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Presentation Transcript
need for aquaculture
Need for Aquaculture
  • The need for food around the world is always increasing
  • Fish stocks are declining - New resources need to be developed
  • Growing and caring for aquatic organisms for the purpose of food production
          • Salmon, Mussels, Oysters, Scallops, Trout, Arctic Char, Sea Urchins, Kelp, etc.
shellfish filter feeding
Shellfish - Filter Feeding
  • Filter feeding animals are very important in an ecosystem
      • They eat what is already there - so they don’t need to be given artificial food
      • They clean the water - most can even filter and eat bacteria, making them safe to consume
slide5
AMERICAN OYSTER

ANATOMY

INTESTINE

HEART

STOMACH

GILLS

MANTLE

slide6
Condo with Oysters

Oyster

Aquaculture

The cages are tied and floated in rows to feed on naturally occurring food

slide7
Quahaug

Aquaculture

Shows high densities in red areas

slide8
Lines from a distance

Mussel

Aquaculture

Mature lines out of water

Closer to lines on a calm day

slide9
90 meters

Marker Buoy

Support Line

Buoy

Between 5 & 7 Metres deep

150 socks per line

Mussels

Sock

Anchor

BOTTOM

Suspended mussel line

Mussel

Aquaculture

slide10
SCUBA

Divers getting positioned

slide11
Click on middle frame

Look at mussel lines

SCUBA

Look for starfish in divers hand

slide12
SCUBA

This mussel line will be used for samples

research
Research
  • “Weather Station” use of cages
      • Temperature/Salinity
      • Water quality
  • What are the conditions in the bay
      • Growth / Survival
      • Competition
      • Invasive species
slide14
Mussel Cage

DFO/AVC

1 m

Temperature

Recorder

(1 min intervals)

Collecting portion

research1
Research
  • Field studies
    • Deployment of 50 cages in PEI, NS, and NB (Oysters and Mussels)
working with aquatic ecosystems
Working with Aquatic Ecosystems
  • Dynamic - Everything is in movement
      • Tides, currents, water exchange, etc.
  • Interrelated - All the parts are connected
      • Impact on one part affects the others
  • Influences - Many things affect the ecosystem
      • Water based factors - Constantly changing environment
      • Land based factors - Most things eventually finish in the oceans
      • Natural and Man-made impacts
      • Other species
invasive species
Invasive species

Green Crab

Clubbed Tunicate

Codium

questions
Questions?

Aquaculture

Marine Biology

Scientific Research

Ecosystems

Scuba Diving

Mussels

Oysters

?

Crabs

Lobsters

Challenges

Invasive species

questions on any of the topics above
Questions on any of the Topics Above ?

Contact

Matthew Hardy

Aquaculture Biologist

Fisheries and Oceans Canada

Gulf Region

343 Université Avenue

Moncton, N.B.   E1C 9B6

Tel. (506) 851-2728

E-mail: [email protected]

Or any DFO office in your area

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