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دراسة محتوى الاحماض الدهنية في زيوت بعض الاسماك في بيئتين مختلفتين في مدينة البصرة، العراق == Study of Fatty acid content in oils for some fishes from different environments in Basrah, Iraq
Author name:
ندى رافد عثمان
Supervisor name:
امجد كاظم رسن | ضياء فالح الفكيكي
General topic:
Agricultural sciences
Specific topic:
Zoology - Fish And Marine Wealth
Degree:
Master
University:
University Of Basrah - Faculty Of Agriculture - Department Of Fish And Marine Wealth
Language:
Arabic
University location:
Basrah
First pages:
31T1873 - p.pdf
Abstract:
The current study was conducted during the period from October 2013 until September 2014 to estimate the fatty acids for three types of marine fish Acanthopagrus arabicus, Chelon subviridis and Cynoglossus arel also three types of river fish, Leuciscu svorax, Coptodon zillii and Carassius auratus.The results analyzed statistically using statistical program SPSS and using the complete randomized design CRD with three replicates and studied factors tested using the rate least significant difference test R.L.S.D at the level of probability (0.05) where indicated the results of statistical analysis that the presence of difference (P <0.05) in fat content between the species studied except A. arabicus with C. subviridis and A. arabicus with L. svorax and C. subviridis with L. svorax and C. arel with C. zillii as there are no significant differences (P <0.05), the highest percentage of fat in A. arabicus for spring (4.23%) while the lowest rate in C. arel for summer (1.75%), while the humidity was between statistical analysis to the absence of significant differences (P> 0.05) between the fish species except L. svorax with the rest of the species, where they found significant differences (P <0.05) between them, with the highest percentage of moisture in C. arel in summer as it stood at 79.14% and the lowest percentage of moisture in A. arabicus in spring (70.8%), as the results indicated an inverse relationship between humidity and fat by the differences of the seasons and for the most of the species studied. Characterized C. arel for autumn by higher contents of ash (8.1%) and achieved significant differences(P<0.05) between the species except C. subviridis with C. zillii and C. auratus with L. svorax as there were no significant differences (P> 0.05), while the lowest percentage was in L. svorax for winter (1.24%), while, the results of protein content showed no significant difference (P>0.05) except L. svorax with A. arabicus, C. subviridis and C.Barel, C. auratus and C. zillii, as well as C. arel and C. zillii, because there were no significant differences among them, A. arabicus achieved the highest value in spring (20.12%) and the lowest rate it was for C. arel in summer (14.18%).The oil extracted by organic solvent, and the fatty acids estimated using the gas chromatography - mass spectrometry (calculated on the total amount of the fatty acids), the content and the percentage of saturated fatty acids (SFA) during winter, spring, summer and autumn 25 - 45%, 23 - 40%, 15 - 45%, 40 - 30% respectively, and the proportion of unilateral unsaturated fatty acids double bond MUSA 40 - 15%, 40 - 22%, 18 - 45% and 46 - 27%, respectively, and the proportion of fatty acids multi - unsaturated double bond 35 - 10%, 45 - 13%,17 - 44% and 42 - 20%, respectively .the palmitic acid C16 : 0 occupied the highest proportion among the fatty acids during the seasons of the year except autumn, where was the palmitoleic acid the highest one among the acids.The uncommon fatty acids studied also during the four seasons and8 - Octadecenoic acid has won the highest one among all the fatty acids in the seasons except winter, which saw Heptadecanoic acid has the highest rate.The types of omega - 3 Docosahexaenoic acid (DHA, 22 : 6 n - 3) and Eicosapentaenoic acid (EPA, 20 : 5 n - 3) examined also for the studied fish types during the four seasons where the proportion of EPA high in winter (68.73%), followed by summer as it was 50.59%, while the second type of omega - 3 DHA was the rate of increase convergent during the four seasons, which saw summer the highest rate (49.27%) and the lowest rate was in autumn (40.15%).
