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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Molluscan Aquaculture in Atlantic Canada

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Molluscan AquacultureinAtlantic 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

    • Salmon, Mussels, Oysters, Scallops, Trout, Arctic Char, Sea Urchins, Kelp, etc.


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


This slide shows clumped mussels open and actively feeding


AMERICAN OYSTER

ANATOMY

INTESTINE

HEART

STOMACH

GILLS

MANTLE


Condo with Oysters

Oyster

Aquaculture

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


Quahaug

Aquaculture

Shows high densities in red areas


Lines from a distance

Mussel

Aquaculture

Mature lines out of water

Closer to lines on a calm day


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


SCUBA

Divers getting positioned


Click on middle frame

Look at mussel lines

SCUBA

Look for starfish in divers hand


SCUBA

This mussel line will be used for samples


Research

  • “Weather Station” use of cages

    • Temperature/Salinity

    • Water quality

  • What are the conditions in the bay

    • Growth / Survival

    • Competition

    • Invasive species


  • Mussel Cage

    DFO/AVC

    1 m

    Temperature

    Recorder

    (1 min intervals)

    Collecting portion


    Experimental Mussel Cage on Site


    This mussel measures 4.95 centimeters

    Growth


    Research

    • Field studies

      • Deployment of 50 cages in PEI, NS, and NB (Oysters and Mussels)


    How can there still be good growth in many areas

    that look crowded?


    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

    Green Crab

    Clubbed Tunicate

    Codium


    Mussel research cage covered in club tunicates


    Questions?

    Aquaculture

    Marine Biology

    Scientific Research

    Ecosystems

    Scuba Diving

    Mussels

    Oysters

    ?

    Crabs

    Lobsters

    Challenges

    Invasive species


    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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