Çaklı, Şükran Ege University - Faculty of Fisheries - Department of Fishery and Processing Technology, Turkey , Yünlü, Aslı Cadun Ege University - Faculty of Fisheries - Department of Fishery and Processing Technology, Turkey , Dinçer, M.Tolga Ege University - Faculty of Fisheries - Department of Fishery and Processing Technology, Turkey , Doğan, Serap Balıkesir University - Faculty of Science and Literature - Department of Biology, Turkey , Koçak, Cengiz Ege University - Faculty of Fisheries - Department of Hydrobiology, Turkey

Comparison of polyphenol oxidase activity in different parts of deep water pink shrimp (Parapenaeus longirostris) by using L-DOPA substrate in Marmara Sea during the fishing season

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Melanosis is a major problem associated with the marketing loss of deep water pink shrimp. This is mediated by polyphenoloxidase (PPO), activity. To better understanding of PPO characteristics should pave a way for lowering melanosis so tissue distribution of polyphenol oxidase (PPO) activity was studied in deep water pink shrimp (Parapenaus longristris) post mortem. Activity analyzed in 7 different tissues; the head (cephalothorax+carapace), carapace, exoskeleton of the abdomen, pereopods, pleopods, uropods and telson individually. Due to the results, PPO activity of deep water pink shrimp was determined to be lower from head to telson during the research period. Partial tissue distribution showed that the highest activity was determined in the parts between head and the abdomen by using 70% ammonium sulfate fractions. But statistical significant correlation cannot be detected between the genders. And also comparison between the PPO levels of deep water pink shrimp during the fishing season was performed. The importance of these species came from their economic values, and no available data about the PPO activity in the literature could be observed in Marmara Sea. The determined data showed us the seasonal activity levels of male and female shrimps in Marmara Sea.

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Shrimp , PPO activity , black spot , melanosis

Ege Journal Of Fisheries an‎d Aquatic Sciences

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