مقايسه تركيب شيميايي و پروفايل اسيد چرب كپور دريايي (Cyprinus carpio) در دو محيط طبيعي و پرورشي

Comparison of the chemical composition and fatty acids profile of wild carp (Cyprinus carpio) in natural and cultivated environments

هدف از انجام اين مطالعه تعيين تركيب شيميايي و پروفايل اسيدهاي چرب بافت عضلاني ماهي كپور دريايي پرورشي و كپور دريايي وحشي بود. آناليز تقريبي نمونه‌ها نشان داد كه در بين شاخص‌هاي مورد مطالعه (پروتئين، چربي، خاكستر و رطوبت) تفاوت معني‌داري در بين كپور دريايي پرورشي و كپور دريايي وحشي وجود نداشت (0.05

The present paper aimed at evaluating nutritional value and fatty acid profile of muscle textures of Caspian Sea wild carp and farmed wild carp. No significant differences were found between chemical composition indices (total lipid, crude protein, moisture and ash contents) (P>0.05). Following determination of fatty acid profiles in the Caspian Sea wild carp and farmed wild carp, fatty acid compositions in two groups of fish were found to be significantly different in terms of various fatty acid groups and ratios. In both fish, Palmitic acid (C16:0) and Oleic acid (C18:1 ω-9 cis) were found to be the most abundant saturated and monounsaturated fatty acids, respectively. Saturated fatty acid (SFA), monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) rates were estimated to be 26.71%, 52.57% and 17.68% in farmed wild carp and 22.78%, 40.53% and 25.06% in Caspian Sea wild carp, respectively. Oleic acid was significantly higher in farmed wild carp than the Caspian Sea one (P≤0.05). Linoleic acid (C18:2 ω-6) and decosahexaenoic acid (DHA, C22:6 ω-3) were the most abundant PUFA in farmed wild carp and Caspian Sea wild carps, respectively. ω-3 fatty acids were measured to be 15.79 and 6.16 gr/100 gr lipid in wild and farmed carps, respectively. ω-3 fatty acids content in Caspian sea wild carp was significantly higher than that of farmed wild carp (P≤0.05). ω-3/ω-6 ratio 1.69 and 0.76 in Caspian sea wild carps and farmed carps, respectively, that in both group exceeded the eligible rates proposed by nutritionists. PUFA/SFA ratios were 1.10 and 0.66 in Caspian sea wild carp and framed one, respectively; the rates exceeded the eligible rate (0.45) recommended by HMSO. Considering exceeding PUFA/SFA and ω-3/ω-6 ratios in both Caspian Sea wild carp and farmed wild carps, both fish were considered invaluable fisheries and nutritional resources. It is noteworthy that Caspian Sea wild carp is more nutritious than farmed counterparts thank to its higher rates of PUFA, ω-3, EPA+DHA, ω-3/ω-6 and PUFA/SFA.