Sirirat Chatvijitkul
Auburn University, USA
Title: Pollution potential indicators for feed-based fish and shrimp culture
Biography
Biography: Sirirat Chatvijitkul
Abstract
Biochemical oxygen demand, acidification potential and elemental waste loads from feed were determined for production of channel catfish Ictalurus punctatus, tilapia Oreochromis spp. Atlantic salmon Salmo salar, rainbow trout Oncorhynchus mykiss, and white leg shrimp Litopenaeus vannamei. Loads of these variables in culture systems (system loads) at typical FCRs ranged from 1090-1500 kg t-1 for biochemical oxygen demand, 270-440 kg t-1 for acidification potential, 1186-1885 kg t-1 for carbon dioxide, 35.9-63.5 kg t-1 for nitrogen, and 6.1-15.9 kg t-1 for phosphorus. Using these estimates as representative of feed-based aquaculture and literature data on the proportions of system waste loads typically discharged to the environment (environmental loads), the approximate amounts of waste generated globally by feed-based aquaculture were estimated small in comparison to approximate estimates of global anthropogenic waste. Nevertheless, aquaculture should lessen its environmental waste load and reducing waste load by improving FCR will be discussed.