Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand

© Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey. The purpose of this research was to determine the levels of odorous compounds (geosmin or 2-methylisoborneol (MIB) that potentially cause off-flavor problems in fish reared in integrated, high-nutrient-load ponds in northern...

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Main Authors: Pornpimol Pimolrat, Niwooti Whangchai, Chanagun Chitmanat, Tomoaki Itayama, Louis Lebel
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/54054
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spelling th-cmuir.6653943832-540542018-09-04T10:07:06Z Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand Pornpimol Pimolrat Niwooti Whangchai Chanagun Chitmanat Tomoaki Itayama Louis Lebel Agricultural and Biological Sciences © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey. The purpose of this research was to determine the levels of odorous compounds (geosmin or 2-methylisoborneol (MIB) that potentially cause off-flavor problems in fish reared in integrated, high-nutrient-load ponds in northern Thailand. Water samples were collected from threetilapia ponds located in Chiangrai province, every month from May 2013 to May 2014. Geosmin and MIB were analyzed by gas chromatography-mass spectrometry. The physico-chemical parameters were determined using standard techniques. The concentration of geosmin in water samples ranged between 0.01 and 0.06 μg L<sup>-1</sup>, while that of MIB ranged between 0.09 and 0.11 μg L<sup>-1</sup>. The concentration of geosmin was positively correlated (r=0.84; P<0.01) with the density of cyanobacteria and chlorophyll a (r=0.57; P<0.01) in the water. The highest concentration of MIB (0.11 μg L<sup>-1</sup>) was observed in October, and over all samples, concentrations were positively correlated (r=0.56; P<0.01) with culture period but negatively correlated with light intensity (r=-0.39; P<0.05). Seven genera of cyanobacteria were most frequently encountered, namely: Anabaena sp., Oscillatoria sp., Pseudanabaena sp., Lyngbya sp., Phormidium sp., Planktolyngbya sp. and Synchococcus sp. The detailed patterns of association found suggest that Anabaena sp. and Oscillatoria sp. were the biological origins of geosmin, whereas the source of MIB was Pseudanabaena sp.These findings are an important step towards the prediction, control and management of the off-flavor problem in tilapia culture in high-nutrientload ponds. 2018-09-04T10:07:06Z 2018-09-04T10:07:06Z 2015-01-01 Journal 13032712 2-s2.0-84940981224 10.4194/1303-2712-v15_2_09 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84940981224&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/54054
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
Pornpimol Pimolrat
Niwooti Whangchai
Chanagun Chitmanat
Tomoaki Itayama
Louis Lebel
Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand
description © Published by Central Fisheries Research Institute (CFRI) Trabzon, Turkey. The purpose of this research was to determine the levels of odorous compounds (geosmin or 2-methylisoborneol (MIB) that potentially cause off-flavor problems in fish reared in integrated, high-nutrient-load ponds in northern Thailand. Water samples were collected from threetilapia ponds located in Chiangrai province, every month from May 2013 to May 2014. Geosmin and MIB were analyzed by gas chromatography-mass spectrometry. The physico-chemical parameters were determined using standard techniques. The concentration of geosmin in water samples ranged between 0.01 and 0.06 μg L<sup>-1</sup>, while that of MIB ranged between 0.09 and 0.11 μg L<sup>-1</sup>. The concentration of geosmin was positively correlated (r=0.84; P<0.01) with the density of cyanobacteria and chlorophyll a (r=0.57; P<0.01) in the water. The highest concentration of MIB (0.11 μg L<sup>-1</sup>) was observed in October, and over all samples, concentrations were positively correlated (r=0.56; P<0.01) with culture period but negatively correlated with light intensity (r=-0.39; P<0.05). Seven genera of cyanobacteria were most frequently encountered, namely: Anabaena sp., Oscillatoria sp., Pseudanabaena sp., Lyngbya sp., Phormidium sp., Planktolyngbya sp. and Synchococcus sp. The detailed patterns of association found suggest that Anabaena sp. and Oscillatoria sp. were the biological origins of geosmin, whereas the source of MIB was Pseudanabaena sp.These findings are an important step towards the prediction, control and management of the off-flavor problem in tilapia culture in high-nutrientload ponds.
format Journal
author Pornpimol Pimolrat
Niwooti Whangchai
Chanagun Chitmanat
Tomoaki Itayama
Louis Lebel
author_facet Pornpimol Pimolrat
Niwooti Whangchai
Chanagun Chitmanat
Tomoaki Itayama
Louis Lebel
author_sort Pornpimol Pimolrat
title Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand
title_short Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand
title_full Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand
title_fullStr Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand
title_full_unstemmed Off-flavor characterization in high-nutrient-load tilapia ponds in Northern Thailand
title_sort off-flavor characterization in high-nutrient-load tilapia ponds in northern thailand
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84940981224&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/54054
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