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Highly Effective Oyster Spat
Production Technique
The Fran-Spat-Pool
June 2015
Compiled by the
Massachusetts Oyster Projec...
The Ideal Spat Production Method for
Oyster Restoration
• Would produce millions of fertile spat
• Would be low cost
• Wou...
It only takes 16 oysters
• A female will produce 2-115 million eggs in a
spawn.
• A male will produce a billion sperm.
• W...
Here is what you need
• A kiddie pool 4 feet in
diameter- available in
drug stores in the spring
for $8
• 16-20 oysters
• ...
Why it works
• The pool is flushed every 11
hours with the tides
• If the tide recedes on a sunny
day, the pool water
temp...
Think about the location to maximize
the spat settlement.
• Do place your Fran-
Spat-Pool
– Deep in the estuary so
that re...
Cost per oyster cannot be beat.
• Pool $8
• Oyster stock $25
• Total cost $33
• Spat Produced 200 million
– 2 turns of 100...
Ongoing results
• You will not see oysters setting in the pool.
• Assuming you place the Fran-Spat-Pool in
May, you should...
Disclaimer
• Mass Oyster has produced this presentation as a
service to oyster restoration programs around the
country.
• ...
Give us your feedback
After trying the Fran-Spat-Pool let us know what
results you get…
Email us at massoyster@gmail.com
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Highly efficient oyster spat production technique for restoration

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Oyster restoration requires reproduction. This presentation discusses a technique for producing large amounts of fertile gametes (spat) in an intertidal zone. It produces enormous amounts of spat at low cost, from few oysters with little human intervention.

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Highly efficient oyster spat production technique for restoration

  1. 1. Highly Effective Oyster Spat Production Technique The Fran-Spat-Pool June 2015 Compiled by the Massachusetts Oyster Project www.massoyster.org
  2. 2. The Ideal Spat Production Method for Oyster Restoration • Would produce millions of fertile spat • Would be low cost • Would require minimum infrastructure • Would provide multiple sets per season • Would be easy to manage
  3. 3. It only takes 16 oysters • A female will produce 2-115 million eggs in a spawn. • A male will produce a billion sperm. • With 16 oysters at least 5 are likely to be female producing a total of 150 million eggs. • The key is keeping them in a small area so that the eggs are exposed to sperm and not lost in the current. • The heavy eggs tend to sink to the bottom.
  4. 4. Here is what you need • A kiddie pool 4 feet in diameter- available in drug stores in the spring for $8 • 16-20 oysters • Rocks to hold kiddie pool in place (sand may be preferable as it is easier to clean.) • A location to place the kiddie pool towards the high end of the intertidal zone.
  5. 5. Why it works • The pool is flushed every 11 hours with the tides • If the tide recedes on a sunny day, the pool water temperature rises. • The oysters respond by releasing their gametes. • Those eggs and sperm are concentrated in a small volume so the fertilization rate is very high. • The next tidal cycle allows the fertile spat to move out of the pool and into the local environs. I am a Spat. I will grow into an oyster.
  6. 6. Think about the location to maximize the spat settlement. • Do place your Fran- Spat-Pool – Deep in the estuary so that released spat have a longer area to settle before getting washed to sea. – Near natural sinks or pools that will hold the oysters at low-tide. – Near substrate that oysters can attach to. • Avoid placing your Fran Spat Pool – On the open ocean where spat will be swept away – Areas with high flow or flushing rates as the spat can be carried away – Areas with high wave action that can disturb your Fran-Spat-Pool
  7. 7. Cost per oyster cannot be beat. • Pool $8 • Oyster stock $25 • Total cost $33 • Spat Produced 200 million – 2 turns of 100 million each. We assume • only 5 oysters are females producing eggs (it could be 10!) • and that each produces 30 million or 150 million eggs each turn. (they can put out up to 115 million eggs) • There is a 66% fertilization rate for 100 million vital spat each turn or 200 million oysters. • If 5% of the spat survive that is 10 million oysters The cost per oyster is 3/10,000ths of a cent! Or 0.00003 cents per oyster!
  8. 8. Ongoing results • You will not see oysters setting in the pool. • Assuming you place the Fran-Spat-Pool in May, you should see settled oysters in the area within 6 months. • You should think about rinsing the oyster pools periodically.
  9. 9. Disclaimer • Mass Oyster has produced this presentation as a service to oyster restoration programs around the country. • Our intention is to add to the programs a new tool- the Fran-Spat-Pool so that they can overcome some of the cost hurdles of oyster restoration. • We encourage all parties interested in using the Fran- Spat-Pool technique to first speak with their local Department of Marine Fisheries to ensure that they are in compliance with local regulations. • We also ask that you use the name Fran-Spat-Pool to honor its originator.
  10. 10. Give us your feedback After trying the Fran-Spat-Pool let us know what results you get… Email us at massoyster@gmail.com

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