The effect of environmental factors on the fatty acid composition of copepods and Artemia in the Sfax solar saltern (Tunisia) |
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| Affiliation: | 1. Department of Science and Environment, Roskilde University, DK-4000 Roskilde, Denmark;2. Institute of Marine Biology, National Taiwan Ocean University, Keelung 20224, Taiwan;3. Department of Plant and Environmental Sciences, University of Copenhagen, DK-1871 Frederiksberg C, Denmark;4. DHI Water & Environment (S) Pte Ltd, 1 Cleantech Loop, #03-05 CleanTech One, 637141, Singapore;1. School of Life Sciences, Xiamen University, Xiamen 361005, China;2. Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361005, China |
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| Abstract: | The biochemical composition and abundance variation of zooplankton (copepods and Artemia salina) were determined in four ponds of increasing salinity (A5, A16, C41 and M2) in the Sfax solar saltern (Tunisia). The zooplankton community was dominated by copepods in the ponds A5, A16 and C41. The pond M2 was marked by the presence of only Artemia salina. Our results showed the dominance of total saturated fatty acids (SFA), which made up 57%–95% of total fatty acids (TFA). SFA 16:0 and 18:0 dominate in all ponds. A. salina showed the highest amounts of the total monounsaturated (MUFA) and polyunsaturated fatty acids (PUFA), this indicates that this species could be employed in hatcheries and used as food source for some aquarium species. Fatty acids of herbivory, proportion of all diatom markers to all flagellate markers (D/F), were negatively correlated with the total zooplankton (r = −0.998, p < 0.05). A. salina was negatively correlated with a biomarker for carnivory polyunsaturated fatty acids/saturated fatty acids (PUFA/SFA) (r = −0.959, p < 0.05). The dietary quality of zooplankton seems to be dependent on food availability in the four studied ponds. |
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| Keywords: | Sfax solar saltern Fatty acids Copepods TFA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0035" }," $$" :[{" #name" :" text" ," _" :" total fatty acids SFA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0045" }," $$" :[{" #name" :" text" ," _" :" saturated fatty acids PUFA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0055" }," $$" :[{" #name" :" text" ," _" :" polyunsaturated fatty acids MUFA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0065" }," $$" :[{" #name" :" text" ," _" :" monounsaturated fatty acids HUFA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0075" }," $$" :[{" #name" :" text" ," _" :" high unsaturated fatty acids D/F" },{" #name" :" keyword" ," $" :{" id" :" kwrd0085" }," $$" :[{" #name" :" text" ," _" :" proportion of all diatom markers to all flagellate markers EPA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0095" }," $$" :[{" #name" :" text" ," _" :" eicosapentaenoic acid (20:5 (n−3)) DHA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0105" }," $$" :[{" #name" :" text" ," _" :" docosahexaenoic acid (22:6 (n−3)) ARA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0115" }," $$" :[{" #name" :" text" ," _" :" arachidonic acid (20:4 (n−6)) PUFA/SFA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0125" }," $$" :[{" #name" :" text" ," _" :" polyunsaturated fatty acids/saturated fatty acids DHA/EPA" },{" #name" :" keyword" ," $" :{" id" :" kwrd0135" }," $$" :[{" #name" :" text" ," _" :" docosahexaenoic acid/eicosapentaenoic acid (22:6(n−3)/20:5(n−3)) FATMS" },{" #name" :" keyword" ," $" :{" id" :" kwrd0145" }," $$" :[{" #name" :" text" ," _" :" fatty acid trophic markers |
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