scholarly journals Seasonal changes in European whitefish muscle and invertebrate prey fatty acid composition in a subarctic lake

2019 ◽  
Vol 64 (11) ◽  
pp. 1908-1920 ◽  
Author(s):  
Ossi Keva ◽  
Patrik Tang ◽  
Reijo Käkelä ◽  
Brian Hayden ◽  
Sami J. Taipale ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Seasonal Changes ◽  
Invertebrate Prey ◽  
Subarctic Lake

Seasonal changes in fatty acid composition of estuarine intertidal biofilm: Implications for western sandpiper migration

2019 ◽  
Vol 224 ◽  
pp. 94-107 ◽  
Author(s):  
Peter J. Schnurr ◽  
Mark C. Drever ◽  
Hedy J. Kling ◽  
Robert W. Elner ◽  
Michael T. Arts
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Seasonal Changes ◽  
Western Sandpiper

Seasonal changes in the fatty acid composition of Argentine stem weevil,Hyperodes bonariensis(Coleoptera: Curculionidae)

1981 ◽  
Vol 8 (1) ◽  
pp. 79-82 ◽  
Author(s):  
S. L. Goldson ◽  
R. M. Emberson ◽  
R. Bickerstaffe
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Seasonal Changes

scholarly journals Seasonal changes in abundance, lipid and fatty acid composition of Calanus euxinus in the South-eastern Black Sea

2017 ◽  
Vol 64 (3) ◽  
Author(s):  
N. Sen Ozdemir ◽  
A. M. Feyzioglu ◽  
F. Caf ◽  
I. Yildiz
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Black Sea ◽  
Lipid Content ◽  
Seasonal Changes ◽  
Total Lipid Content ◽  
Trophic Levels ◽  
The South ◽  
South Eastern

Seasonal changes in abundance, lipid and fatty acid composition of Calanus euxinus Hulsemann, 1991 were analysed monthly during the period from March 2012 to February 2013. The highest abundance of C. euxinus was recorded in February (847 ind. m-3) during the sampling period. Female and male C. euxinus peaked in February (587 ind. m3, 169 ind. m-3, respectively). However, copepodites peaked in November (107 ind. m-3). Average total lipid content was determined as percentage (%) and per individual (mg ind-1). It was proportionally highest in February (7.03%) and lowest in September (3.02%). However, average lipid content per individual was highest in February (0.11 mg ind-1) and lowest in September and November (0.04 mg ind-1). Major fatty acids in C. euxinus were identified as 16:0, 16:1 n-7, EPA and DHA. ΣSFA, ΣMUFA, ΣPUFA and ΣHUFA were observed to be correlated with temperature. ΣSFA and ΣMUFA increasedwith the rise in temperature (r2=0.74, r2=0.73, p<0.05, respectively) whereas ΣPUFA and ΣHUFA increased as temperature decreased (r2=-0.73, r2=-0.80, respectively, p<0.05). Additionally, while ΣPUFA and ΣHUFA increased (r2=0.61, r2=-0.68, respectively, p<0.05), ΣMUFA decreased (r2=-0.68, p<0.05) as chlorophyll-a increased. It was observed that the degree of unsaturation increased as temperature decreased. Results of the study revealed that C. euxinus has rich lipid content as well as fatty acid composition and it plays an important role in the South-eastern Black Sea ecosystem functionalities especially having key role in energy fluxes to higher trophic levels.

scholarly journals Seasonal Changes in Fatty Acid Composition of the Wood Thrush

The Condor ◽  
1994 ◽  
Vol 96 (3) ◽  
pp. 791-794 ◽  
Author(s):  
Courtney J. Conway ◽  
William R. Eddleman ◽  
Kenneth L. Simpson
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Seasonal Changes ◽  
Wood Thrush

Seasonal Changes in Fatty Acid Composition of Cod Liver, Flesh, Roe, and Milt Lipids

1967 ◽  
Vol 24 (3) ◽  
pp. 613-627 ◽  
Author(s):  
P. M. Jangaard ◽  
R. G. Ackman ◽  
J. C. Sipos
Keyword(s):  
Fatty Acids ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Seasonal Changes ◽  
Lower Percentage ◽  
Medium Size ◽  
Large Fish ◽  
Significant Difference ◽  
Fatty Acid Compositions

The fatty acid compositions of lipids from an isolated population of inshore cod (Gadus morhua L.) caught near Terence Bay, Nova Scotia, were determined each month on pooled samples of representative fish. Cod liver oil was studied over a period of 17 months, cod flesh for 12 months with the fatty acid compositions of milt, roe, flesh, and liver lipids being determined from some large, individual fish.The fatty acids of flesh lipids were independent of sex and showed very little, if any, seasonal changes except a slight variation in the long-chain monounsaturated acid 20:1 (max 2.8% vs. avg 1.6% and 1.1%). This was especially evident in large fish where the maximum (3.7%) coincided with the period of best "condition," August to November. There was also a significant difference between large and medium size fish in that in very large fish the content of 22:6 was much lower (26% vs. 33%). Liver oils in female fish contained increasing amounts of 20:1 (4.5 to 14.9%) and 22:1 (1.8 to 12.3%) fatty acids with increased fat content of the liver, maxima occurring in late summer and fall. In the male fish this seasonal trend was not as obvious. No other acids showed any definite seasonal variation. In the fatty acids of roe and milt lipid no definite relationship could be established between ripening and fatty acid composition. The fatty acids of the milt were similar to the roe except for a higher percentage of 18:1 and lower percentage of 16:1. The unsaponifiable matter was higher in milt than in roe lipids.These results indicate that due to the large variations that can occur in the fatty acid content of lipids from individual fish, a single analysis could give a fatty acid composition quite different from the average of a large number of determinations.

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