Relationships of dissolved oxygen with chlorophyll-a and phytoplankton composition in tilapia ponds

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dc.contributor.authorKunlasak, Kornkanok
dc.contributor.authorChitmanat, Chanagun
dc.contributor.authorWhangchai, Niwooti
dc.contributor.authorPromya, Jongkon
dc.contributor.authorLebel, Louis
dc.date.accessioned2014-12-12T16:01:03Z
dc.date.available2014-12-12T16:01:03Z
dc.date.copyright2013
dc.date.issued2013-09
dc.description.abstractThis study investigated the relationships among the parameters of dissolved oxygen, chlorophyll-a and phytoplankton composition in tilapia ponds. Each pond (a total of 18 ponds) was sampled once in the dry, winter season between Jan-uary and March and again early in the rainy season between May and June. The data were analyzed by examining cor-relations among parameters as affected by season, altitude and culture system. Observations were made at sites located in 5 selected provinces of northern Thailand: Chiangrai, Chiangmai, Phayao, Lampang and Nakornsawan. Mean eleva-tion of these areas range from 25 to 582 meters above sea level (masl) and were categorized into low (<400 masl) and high (>400 masl) elevation sites. Ponds were 0.8 - 2.0 m deep, 0.16 - 0.64 ha in area and could be further categorized into high and low input systems.Mean air temperature in winter ranged between 16.5˚C - 35.8˚C while mean water temperature ranged between 25.5˚C - 27.1˚C. In rainy season, air temperature ranged between 22.0˚C - 37.3˚C and wa-ter temperature ranged between 29.4˚C - 31.8˚C. The amount of chlorophyll-a in both seasons were comparable (p > 0.05), but chlorophyll-a in high input system was significantly higher (p < 0.05) than in low input ponds. Only weak correlation was found between chlorophyll-a, DOmax and DOmin. Multifactor-ANOVA was used to analyze the differ-ence of total bacteria and filamentous cyanobacteria in ponds based upon elevation, culture systems and season. Result shows that there is a significant interaction observed between elevation, culture system and season (p < 0.05). Species diversity and composition of phytoplankton in fish ponds in 2 seasons revealed the presence of 90 genera of phytop-lankton under all 7 divisions. Divisions Chlorophyta and Cyanophyta had the most number of genera identified in both seasons with Pediastrum spp., and Scendesmus spp., and Anabaena spp. as dominant genera/genus, respectively.en
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dc.identifier.citationKunlasak, K., Chitmanat, C., Whangchai, N., Promya, J., & Lebel, L. (2013). Relationships of Dissolved Oxygen with Chlorophyll-a and Phytoplankton Composition in Tilapia Ponds. International Journal of Geosciences, 4, 46-53. http://dx.doi.org/10.4236/ijg.2013.45B008en
dc.identifier.urihttp://hdl.handle.net/10625/53440
dc.language.isoen
dc.publisherScientific Researchen
dc.subjectDISSOLVED OXYGENen
dc.subjectCHLOROPHYLL-Aen
dc.subjectPHYTOPLANKTON COMPOSITIONen
dc.subjectTILAPIA PONDSen
dc.subjectELEVATIONen
dc.subjectSEASONSen
dc.subjectTHAILANDen
dc.subjectAQUACULTURE TECHNIQUESen
dc.subjectCLIMATE SENSITIVE DISEASESen
dc.subjectFISH PRODUCTIONen
dc.subjectENVIRONMENTAL HEALTHen
dc.subjectWATER QUALITYen
dc.subjectOREOCHROMIS NILOTICUS Len
dc.titleRelationships of dissolved oxygen with chlorophyll-a and phytoplankton composition in tilapia pondsen
dc.typeJournal Article (peer-reviewed)en
idrc.copyright.holderScientific Research
idrc.dspace.accessIDRC Onlyen
idrc.noaccessDue to copyright restrictions the full text of this research output is not available in the IDRC Digital Library or by request from the IDRC Library. / Compte tenu des restrictions relatives au droit d'auteur, le texte intégral de cet extrant de recherche n'est pas accessible dans la Bibliothèque numérique du CRDI, et il n'est pas possible d'en faire la demande à la Bibliothéque du CRDI.en
idrc.project.componentnumber107087001
idrc.project.number107087
idrc.project.titleAquaculture intérieure et adaptation aux changements climatiques dans le nord de la Thaïlandeen
idrc.recordsserver.bcsnumberIC01-4758-18
idrc.rims.adhocgroupIDRC SUPPORTEDen

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