Oysters show significantly higher growth rate and survival on Biorock electrical structures

Fri, 03/23/2012 - 03:54 -- admintps

Thesis by Nikola Berger, 2009

ABSTRACT

Since Europeans settled in the Hudson Bay area in the 17 th century, oysters filled the estuary until the 20th century when the last oyster beds collapsed from over harvesting, siltation, diseases and pollution. Oyster reefs historically were very important to the NY/NJ bay area— economically and ecologically. A group of non-profit organizations in the NY/NJ Bay area have been trying to bring the American oyster Crassostrea virginica, back for various reasons—among them, habitat improvement, storm surge and coastal erosion protection, spawning grounds for other marine life and the oyster’s water "filtering" capacity. Different projects have been in the works to create oyster reefs with mixed results. The Oyster Growth study that I have been involved with and is described in this paper is examining one possible way to help jump-start a reef by growing larger oysters in a shorter amount of time. The method we examined, known as Biorock TM Technology, has shown to increase coral growth during coral reef restoration projects. The technology works by using electrostatically mediated calcium carbonate deposition on submerged metal structures. The accreted minerals may be more bio-available to the oyster on the metal structure and therefore, possibly promote oyster shell growth. One goal of this study was to see if this method can be used to aid in oyster reef restoration....Read more: See attached pdf

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