Tag Secchi disk

• Environmental & Social Responsibility

  February 11, 2019

  Thoughts on pond fertilization

  Prof. Boyd provides additional insights into fertilization of aquaculture ponds, discussing phytoplankton requirements, organic and inorganic fertilizers, and other relevant aspects of pond management. 

• Environmental & Social Responsibility

  November 1, 2014

  Light penetration in water

  Light penetrating water is scattered and absorbed exponentially as it passes downward. The presence of dissolved organic matter and suspended solids further impedes light penetration, and different types of solids absorb different wavelengths. 

• Feed Sustainability

  March 1, 2011

  Multiple methods for phytoplankton assessment

  The simplest tool for assessing phytoplankton abundance in aquaculture ponds is the Secchi disk. An electronic turbidimeter can be used to measure the amount of light scattered by a water sample.