Tag phytoplankton

• 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. 

• Animal Health & Welfare

  August 20, 2018

  Dissolved oxygen dynamics

  Dissolved oxygen management is the most important requirement of aquaculture pond water quality. DO concentration below 3 mg/L is stressful to shrimp. 

• Environmental & Social Responsibility

  December 11, 2017

  Factors affecting efficiency of commercial fertilizers in aquaculture

  Intensification of pond aquaculture involves the use of commercial fertilizers such as urea and triple superphosphate to stimulate phytoplankton blooms. There is no objective way of determining the ideal fertilization rate for an individual pond. 

• Environmental & Social Responsibility

  December 4, 2017

  Properties of common commercial fertilizers in aquaculture

  Commercial nitrogen and phosphorus fertilizers are widely used in aquaculture production systems to stimulate phytoplankton growth and the food web that provides natural food organisms beneficial to stocked fish fry and shrimp postlarvae. 

• Environmental & Social Responsibility

  September 4, 2017

  The impact of atmospheric carbon dioxide, alkalinity in freshwater aquaculture

  Changes in atmospheric carbon dioxide concentration should have little effect on rising alkalinity concentration in aquaculture systems. Climate change is of greater concern in freshwater aquaculture than is an increase in alkalinity. 

• Animal Health & Welfare

  August 21, 2017

  Phytoplankton and its impact on water quality

  Phytoplankton has several important effects on water quality, including removing ammonia nitrogen from water and absorbing nutrients from the water for its growth. Abundance of blue-green algae tends to increase as nutrient inputs in aquafeeds or fertilizers increase. 

• Environmental & Social Responsibility

  April 24, 2017

  Phytoplankton in aquaculture ponds: Friend or foe?

  A vigorous phytoplankton bloom will support a healthy benthic community and will contribute significantly to stabilising and maintaining adequate pond water and bottom quality. 

• Feed Sustainability

  April 17, 2017

  Understanding the oxygen demand of aquafeeds

  Manufactured aquafeeds, if improperly managed, can result in undesirable oxygen demand that can reduce dissolved oxygen levels and pollution through effluents, and stress cultured animals. 

• Animal Health & Welfare

  January 30, 2017

  El fitoplancton es un componente crítico de los ecosistemas de estanques acuícolas

  Los organismos fitoplanctónicos, o microalgas, son muy abundantes en los estanques de acuacultura y tienen un papel crítico en estos ecosistemas, influyendo significativamente en la ecología general del estanque y en la calidad del agua. El manejo adecuado de las 

• Environmental & Social Responsibility

  January 9, 2017

  The inevitable pH fluctuations of aquaculture pond water

  It is one of the most commonly measured water quality variables in aquaculture, and probably the most misunderstood water quality variable in aquaculture. The pH levels in water have a propensity to change rapidly, but this is a natural phenomenon