Friday, June 26, 2015

Cultch Efficiency: Rationale and setup

Rationale

We are continuing our studies of how aquaculture techniques can be leveraged to increase the growth and survival of oyster spat on shell cultch for oyster restoration.  

Methods

Type/Treatment
Racks and Bags
Bags on Ground
no Bag no Rack
(on ground)
Remote set cultch
6
6
6
Clean cultch
6
6
6
This year we have chosen the following sets of treatments.   We will try to separate out the role of oyster bags and racks on survival and growth of remote set and wild set spat on shell cultch.  Our control treatment will be cultch on the bottom without any protection.  Cultch material consists of 5 kg lots of dried oyster shell which have been out of the water for over one year.  The shells vary in size but are for the most part whole.  On June 24, 2015 mesh bags of oyster shell were placed in the remote settling tank at the hatchery.  The three clean cultch treatments were prepared for deployment on July 1, 2015.

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