Seasonal and sexual changes of chemical composition in puffer fish (Lagocephalus sceleratus) caught from Northeastern Mediterranean


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KÖŞKER A. R., UÇAR Y., AYAS D., ÖZOĞUL F., DURMUŞ M., ÖZOĞUL Y.

TAFT 2015- 5th Trans-Atlantic Fisheries Technology conference (45th WEFTA meeting), Nantes, France, 12 - 15 October 2015, pp.1

  • Publication Type: Conference Paper / Full Text
  • City: Nantes
  • Country: France
  • Page Numbers: pp.1
  • Çukurova University Affiliated: Yes

Abstract

Alien marine species migrate into the Mediterranean via the Suez Canal. Some alien species have economic value, although some species are harmful on ecosystem, native species and human health especially in the eastern Mediterranean. Pufferfish is regarded as one of the “worst alien fishes” of the entire Mediterranean Sea. Because most members of the Tetraodontidae are contain Tetrodotoxin (TTX). However, in the Far East, this fish is considered a delicate fish, especially in Japan where it is prepared by experts. In this study, changes of sexual and seasonal of proximate composition, mineral composition and fatty acid profile of puffer fish (Lagocephalus sceleratus) were investigated. The samples used seasonally were caught by bottom trawl, longline and fishing line from Mersin Bay during the period of December 2012 and November 2013. Nutritional composition analysis showed that the average protein, lipid, moisture and ash content for males were 20.44%, 0.65%, 76.98%, 1.43% and for female individuals were 20.58%, 0.87%, 77.12%, 1.4%, respectively. In terms of fatty acid analysis, 21 different fatty acids have been identified in muscle of puffer fish. Palmitic acid (C16:0), stearic acid (C18:0), linoleic acid (C18:2n6), linolenic acid (C18:3n3), vassenic acid (C18:1 ω 7), arachidonic acid (C20:4ω6), docosadienoic acid (C22:2 cis), eicosapentaenoic acid (C20:5 n3) and docosahexaenoic acid (C20:6n3) were the predominant fatty acids in all samples. The differences in Na, Mg, P, K, Ca, Co, Ni, Cu, Zn, Se and Mo levels of muscle tissue in all seasons were determined as 2729.9-4884.64 µg/g, 1040.0-1477.5 µg/g, 10978.0-20037.0 µg/g, 14593.0-20577.0 µg/g, 196.7-1104.5 µg/g, 0.44-0.69 µg/g, 1.32-2.44 µg/g, 1.69-2.65 µg/g, 28.55-54.22 µg/g, 2.81-3.98 µg/g and 1.00-2.13 µg/g, respectively. The quantity relationships generally found in the metal levels of muscle in all the species were: K > P > Na > Mg > Ca > Zn > Se > Cu > Ni > Mo > Co. Our results showed that pufferfish is highly nutritious seafood in terms of nutritional composition and fatty acid levels. However, consumption of pufferfish is dangerous that due to TTX.