Nutritional Composition and Fatty Acids Content of Neogobius melanostomus caught in Central Black Sea

Öz

The aim of this study was to investigate the effects of gender and months on nutrient components and fatty acids contents of Neogobius melanostomus known as round goby caught in the Middle Black Sea (Ordu). The average protein, lipit, moisture and ash values of these male species were 19.14-20.70%, 2.89-1.22%, 77.81-79.13% and 1.19-1.36%, respectively, while female values were 18.54-20.47%, 1.01-1.22% , 77.87-79.69% and 1.22-1.37%, respectively. The percentages of saturated fatty acids (SFA), monounsaturated fatty acids (MUFA) and polyunsaturated fatty acids (PUFA) of the Neogobius melanostomus species were in the range of 27.18-31.14%, 14.55-18.99% and 29.21-37.61% in male species whereas these values were 25.86-28.94%, 15.71-19.73% and 28.52-33.92% in females species, respectively. The main fatty acids observed were palmitic acid (C16: 0), stearic acid (C18: 0), palmitoleic acid (C16: 1), oleic acid (C18: 1n9), vaccenic asit (C18: 1n7), erucic acid (C22:1n9), linoleic acid (C18: 2n6), eicosapentaenoic acid (EPA, C20: 5n3) and decosahexaenoic acid (DHA, C22: 6n3). High amounts of Omega-3 fatty acids, especially EPA and DHA, were detected in both sexes. w6/w3 ratios were determined at low rates in both sexes. It was determined that the monthly period and gender were effective on the nutrient components and fatty acid content of Neogobius melanostomus species.

Anahtar Kelimeler

• Neogobius melanostomus,Black Sea,nutrient composition,fatty acid

Karadeniz’de Yakalanan Neogobius melanostomus Türünün Besin Madde Bileşenleri ve Yağ Asitleri İçeriği Üzerine Cinsiyet ve Ayların Etkileri

Öz

Bu çalışmada, Karadeniz’de (Ordu) yakalanan Kum Kayabalığı olarak bilinen Neogobius melanostomus türünün besin madde bileşenleri ve yağ asitleri içeriği üzerine cinsiyet ve aylık değişimlerin etkileri araştırılmıştır. İncelenen erkek bireylerde ortalama protein, lipit, nem ve kül değerleri sırasıyla %19.14-20.70, %2.89-1.22, %77.81-79.13 ve %1.19-1.36 aralığında belirlenmiş iken dişi bireylerde ise bu değerler sırasıyla %18.54-20.47, %1.01-1.22, %77.87-79.69 ve %1.22-1.37 olarak belirlenmiştir. N. melanostomus türünde doymuş yağ asitleri, tekli doymamış yağ asitleri ve çoklu doymamış yağ asitleri oranları erkek bireylerde sırasıyla %27.18-31.14, %14.55-18.99 ve %29.21-37.61 aralığında, dişi bireylerde ise sırasıyla %25.86-28.94, %15.71-19.73 ve %28.52-33.92 aralığında olduğu tespit edilmiştir. N. melanostomus türünde belirlenen temel yağ asitlerinin; palmitik asit (C16:0), stearik asit (C18:0), palmitoleik asit (C16:1), oleik asit (C18:1n9), vaksenik asit (C18:1n7), erüsik asit (C22:1n9), linoleik asit (C18:2n6), eikosapentaenoik asit (EPA) ve dekosaheksaenoik asit (DHA) olduğu tespit edilmiştir. Her iki eşey grubununda yüksek miktarda Omega-3 yağ asitleri özellikle EPA ve DHA içerdiği tespit edilmiştir. w6/w3 oranı her iki cinsiyettede düşük oranlarda belirlenmiştir. Aylık değişimlerin ve eşeysel farklılıkların Karadeniz’de yakalanan N. melanostomus türünün besin madde bileşenleri ve yağ asitleri içeriği üzerine etkili olduğu belirlenmiştir.

Anahtar Kelimeler

• Karadeniz,Neogobius melanostomus,besinsel kompozisyonu,yağ asidi

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