Changes during fishing season in the fat content and fatty acid profile of edible muscle, liver and gonads of anchovy (<i>Engraulis encrasicolus</i>) caught in the Turkish Black Sea

Tufan, Bekir; Koral, Serkan; Köse, Sevim

doi:10.1111/j.1365-2621.2011.02562.x

Cited by 33 publications

(30 citation statements)

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“…In general, fat and FA content in fish vary greatly both between and within fish species as values are mainly influenced by feeding as well as further factors such as the geographical location of the fishing ground, season, food availability, water temperature, age and size of the fish and the maturation status [42-47]. This can be seen in the fact that published data varies to a great extent with respect to FA content in fish.…”

Section: Discussionmentioning

confidence: 99%

Survey of n- 3 and n-6 polyunsaturated fatty acids in fish and fish products

2012

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BackgroundThe imbalance of the n-3/n-6 ratio in the Western diet is characterised by a low intake of n-3 long-chain (LC) PUFA and a concurrent high intake of n-6 PUFA. Fish, in particular marine fish, is a unique source of n-3 LC PUFA. However, FA composition of consumed fish changed, due to the increasing usage of n-6 PUFA-rich vegetable oils in aquaculture feed and in fish processing (frying) which both lead to a further shift in n-6 PUFA to the detriment of n-3 LC PUFA.The aim of this study was to determine the ratio of n-3/n-6 including the contents of EPA and DHA in fish fillets and fish products from the German market (n=123). Furthermore, the study focussed on the FA content in farmed salmon compared to wild salmon as well as in processed Alaska pollock fillet, e.g., fish fingers.ResultsTotal fat and FA content in fish products varied considerably depending on fish species, feed management, and food processing. Mackerel, herring and trout fillets characteristically contained adequate dietary amounts of absolute EPA and DHA, due to their high fat contents. However, despite a lower fat content, tuna, pollock, and Alaska pollock can contribute considerable amounts of EPA and DHA to the human supply.Farmed salmon are an appropriate source of EPA and DHA owing to their higher fat content compared to wild salmon (12.3 vs. 2.1 wt %), however with elevated SFA, n-9 and n-6 FA contents representing the use of vegetable oils and oilseeds in aquaculture feed. The n-3/n-6 ratio was deteriorated (2.9 vs. 12.4) but still acceptable. Compared to pure fish fillets, breaded and pre-fried Alaska pollock fillet contained extraordinarily high fat and n-6 PUFA levels.ConclusionsSince fish species vary with respect to their n-3 LC PUFA contents, eating a variety of fish is advisable. High n-6 PUFA containing pre-fried fish support the imbalance of n-3/n-6 ratio in the Western diet. Thus, consumption of pure fish fillets is to be favoured. The lower n-3 PUFA portion in farmed fish can be offset by the higher fat content, however, with an unfavourable FA distribution compared to wild fellows.

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Section: Discussionmentioning

confidence: 99%

Survey of n- 3 and n-6 polyunsaturated fatty acids in fish and fish products

2012

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“…Diğer mevsimlerde depoladığı glikojeni üreme dönemi olan yaz aylarında kullandığı ve bu dönemi takip eden sonbahar mevsiminde literatür ile uyumlu olarak en düşük değerine indiği saptanmıştır. Balıklarda ve diğer su ürünlerinde yağ asidi kompozisyonu türe, cinsiyete, üreme dönemine, su sıcaklığına, mevsimlere, yaşadığı coğrafyaya bağlı olan besin öğelerinin miktar ve çeşitliliğine göre önemli değişimler göstermektedir (Tufan, 2011). Çalışmamızda DYA grubunda en baskın yağ asitlerinin palmitik ve stearik asit olduğu gözlenmiştir.…”

Section: Tartişma Ve Sonuçunclassified

“…Bu açıdan da bakıldığında deniz salyangozunun değerli bir besin olduğu tekrar ortaya çıkmaktadır. Günlük alınması önerilen Σn3 miktarı 450 mg'dır (Tufan, 2011). Çalışmamızda elde edilen verilere göre 100 g deniz salyangozunuzda 100 mg Σn3 tespit edilmiş ve bu miktar yaklaşık olarak günlük ihtiyacın üçte birini karşılamaktadır.…”

Section: Tartişma Ve Sonuçunclassified

Seasonal variation of meat yield and nutritional composition of sea snail (Rapana venosa Valenciennes, 1846 ) captured from Eastern Black Sea Region

Koral¹,

Kıran²

2017

EgeJFAS

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Öz: Bu çalışmada Doğu Karadeniz Bölgesinde ticari olarak avcılığı yapılan deniz salyangozunun (Rapana venosa) mevsime bağlı olarak et verimi, besin ve yağ asidi kompozisyonundaki değişimler incelenmiştir. Giresun, Trabzon, Rize ve Artvin illerindeki toplam 12 istasyondan tüplü ve serbest dalış yöntemi ile örneklemeler yapılmıştır. Deniz salyangozlarının % net et verimleri yaz ve sonbahar mevsimlerinde ilkbahar ve kış mevsimlerine göre daha yüksek tespit edilmiştir. Dört mevsimin genel ortalaması ise % 19,50 olarak saptanmıştır. Biyokimyasal parametrelerden % kuru madde, % ham kül, % ham protein ve % ham yağ miktarı mevsimlere ve istasyonlara bağlı olarak değişiklikler göstermekle beraber mevsimlere göre elde edilen minimum ve maksimum değerler sırasıyla % 23, 87-25,36, % 2,23-2,35, % 15,36-17,16, % 0,46-0,73 olarak bulunmuştur. Doymuş yağ asitleri grubundaki mevsimsel ortalamalarda palmitik (C16:0) ve stearik asit (C18:0) değerleri en düşük oranda yaz mevsiminde en yüksek oranda ise kış mevsiminde tespit edilmiştir. Toplam doymuş yağ asitlerindeki (ΣDYA) mevsimsel değişimin istatistiki açıdan önemli (p>0.05) olmadığı gözlenmiştir. Toplam tekli doymamış yağ asidi (ΣTDYA) miktarları 30,45 mg/100g ile 54,84 mg/100g arasında değişim göstermiş olup yaz ve ilkbahar mevsimlerinde bulunan değerler diğer mevsimlerden elde edilen değerler ile karşılaştırdığında farkın önemli (p<0.05) olduğu tespit edilmiştir. Yağ asidi grupları arasında en yüksek miktar 119,05 mg/100g değeri ile ÇDYA grubunda bulunmuştur. Bu grupta en yüksek miktarlar arişidonik (C20:4n6), eikosapentaenoik (C20:5n3), dokosahegzaenoik (C22:6n3) asitlerde tespit edilmiştir. Yaz ve sonbahar mevsimlerinde EPA ve DHA miktarlarındaki değişim istatistiki açıdan diğer mevsimlerle karşılaştırıldığında farkın önemli (p<0,05) olduğu bulunmuştur. Toplam EPA+DHA miktarı ise 27,40 ile 93,42 mg/100g arasında olup Σn6/Σn3 oranı ise 1,10 ile 0,90 arasında değişmiştir. Çalışma neticesinde Doğu Karadeniz Bölgesindeki deniz salyangozunun besin kompozisyonu üzerine istasyonlar arası farklılığın ve mevsimsel değişimlerin etkileri olduğu belirlenmiştir. Anahtar kelimeler: Deniz salyangozu, Rapana venosa, et verimi, yağ asidi kompozisyonu, Doğu KaradenizAbstract: In this study, changes in meat yield, nutritional and fatty acid composition depending on seasons of sea snail (Rapana venosa) captured commercially in the Eastern Black Sea Region were investigated. The samples were collected from total twelve stations in Giresun, Trabzon, Rize and Artvin by scuba and free diving. Sea snail length and weight ranged from 52.85 to 74.27 mm, and from 66.71 to 78.97 g. Meat yields (%) in summer and autumn were higher than spring and winter. Average meat yields were determined as 19.50 %. Amounts of dry matter, crude ash, crude protein and crude fat percent in biochemical parameters were changed depending on seasons and stations, minimum -maximum values of the seasons were found as 23.87-25.36 %, 2.23-2.35 %, 15.36-17.16 %, 0.46-0.73 %, respectively. The lowest and highest seasonal average...

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“…Seasonal variations in total SFA, PUFA, DHA and some other FA levels were reported by past studies for different fish species (Tufan et al ., ). The changes were usually attributed to different factors, mainly on reproduction period of fish, the availability and the type of feed.…”

Section: Discussionmentioning

confidence: 97%

Variations in lipid and fatty acid contents in different body parts of Black Sea whiting, Merlangius merlangus euxinus (Nordmann, 1840)

Tufan

Köse

2013

Int J of Food Sci Tech

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Summary Whiting is a commercially important fish species of the world. This study demonstrates monthly variations in lipid and fatty acid (FA) contents of muscle, liver and roes of Black Sea whiting, Merlangius merlangus euxinus. Significant changes occurred in lipid contents between months (P < 0.05) with the highest values representing in liver 33.8–64.5%. Total polyunsaturated fatty acids (PUFA) in all groups were higher than total saturated and monounsaturated FAs with significant variations between months (P < 0.05). The highest PUFA of muscles, livers and roes were 60.0, 45.9 and 50.9%, respectively. The main FA was docosahexaenoic acid (DHA) of muscle tissue and roes, while oleic acid was the major FA in livers. Although about 164–357 g in muscle tissue or 224–392 g of whiting roe are necessary to consume to cover 1 g day−1 of eicosapentaenoic acid (EPA)+DHA for a healthy diet, only as low as 5.5–10.0 g of liver would be enough to cover the same amount of daily EPA+DHA requirement. The results indicated that whiting livers constitute a rich and underexploited source of polyunsatured FAs. Furthermore, the results may aid further research on the nutritional studies, the physiology and stock management of whiting species.

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Changes during fishing season in the fat content and fatty acid profile of edible muscle, liver and gonads of anchovy (Engraulis encrasicolus) caught in the Turkish Black Sea

Abstract: This study aimed to determine the fat content and fatty acid (FA) composition of anchovy (Engraulis encrasicolus, Linnaeus, 1758) in their edible muscle, liver and gonad during the catching season (between

Cited by 33 publications

References 43 publications

Survey of n- 3 and n-6 polyunsaturated fatty acids in fish and fish products

Survey of n- 3 and n-6 polyunsaturated fatty acids in fish and fish products

Seasonal variation of meat yield and nutritional composition of sea snail (Rapana venosa Valenciennes, 1846 ) captured from Eastern Black Sea Region

Variations in lipid and fatty acid contents in different body parts of Black Sea whiting, Merlangius merlangus euxinus (Nordmann, 1840)

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