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Mediterranean Fisheries and Aquaculture Research
Number of Followers: 2  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2618-6551
Published by Mersin Universitesi Homepage  [5 journals]
  • Determination of Distribution Status of Non-native Species Trachemys
           scripta elegans (Wied-Neuwied, 1839) in Mersin-Anamur Freshwater Systems

    • Authors: Mehmet Ali ELDELEKLİOĞLU; Nuray ÇİFTÇİ, Deniz AYAS
      Abstract: This study aimed to determine the distribution status of Trachemys scripta elegans (Wied-Neuwied, 1839), a non-native species, in the Mersin-Anamur Freshwater systems. The distribution of the species in Mamure Castle and Alyanak Wetland was observed in the pre-spawning and post-spawning periods. In both sampling periods, 40 individuals could be sampled from Mamure Castle. In the Alyanak wetland, only six individuals were observed in the pre-spawning period. No individuals could be sampled due to the wetland's size, the water's depth and turbidity, the density of the vegetation that allows the individuals to hide, the speed of the individuals, and the team's experience of catching freshwater turtles. In the study, the individuals of T. scripta elegans were detected for the first time outside the moat area of Mamure Castle and in Alyanak Wetland, a place without connection with the moat area. In addition, the number of individuals sampled from the moat of Mamure Castle before and after the spawning period, female-male ratio, and maturation status was determined. The morphometric characteristics of the sampled individuals were measured, and differences depending on maturation and sex were determined.
      PubDate: Fri, 30 Jun 2023 00:00:00 +030
  • Biochemical and Antimicrobial Properties of Alburnus tarichi Roe Protein

    • Authors: Mehmet BERKÖZ; Oruç YUNUSOĞLU, Ferbal ÖZKAN YILMAZ, Arzu ÖZLÜER HUNT, Serap YALIN, Ömer TÜRKMEN
      Abstract: The protein hydrolysates with antioxidant and antimicrobial potential have become a theme of great interest for pharmaceutical, nutraceuticals, as well as food processing and preservation indus-tries. On the other hand, chemical composition of fish protein hydrolysates is significant in nutri-tion perspective of human health. Hence, in the present study proximate and amino acid composi-tions, antioxidant and antimicrobial activities of Alburnus tarichi roe protein hydrolysate was esti-mated. Protein, lipid, moisture, and ash content were found to be 87.24±0.1, 0.72±0.04, 8.79±0.3, and 7.01±0.09%, respectively. Glutamic acid, aspartic acid, lysine, leucine and alanine were found to be the most dominant amino acids, whereas, cysteine was found to be the lowest amino acid in roe protein hydrolysate. The IC50 value of roe protein hydrolysate for DPPH radical and hydroxyl-radical scavenging activities were 54.33 μg/mL and 77.02 μg/mL, respectively. The reducing power of A. tarichi roe protein hydrolysate was analyzed, the optical density values of roe protein hydroly-sate and gallic acid at 700 nm were 0.45±0.03 and 1.14±0.09, respectively. Roe protein hydrolysate had shown maximum zone of inhibition against Klebsiella pneumoniae (11.1±0.30 mm) followed by Salmonella enterica (10.7±0.46 mm), Proteus mirabilis (10.1±0.35 mm) and Candida albicans (8.7±0.34 mm). The results demonstrated the importance of amino acid composition in determin-ing the bioactive potential of the peptides. The results showed that roe protein hydrolysates of A. tarichi was proved to show good effect on antioxidant and antimicrobial activities and can be used a source for nutraceuticals and pharmaceuticals.
      PubDate: Fri, 30 Jun 2023 00:00:00 +030
  • Fattening of Mangrove Crab Scylla serrata Fed with Two Different Diets
           (Stingray and Trash Fish)

    • Authors: Enraıda IMBUK; Suada İNDANAN, Satra SAİLADJAN, Keriman YÜRÜTEN ÖZDEMİR, Jurmin SARRİ
      Abstract: Fattening of mangrove crab S. serrata has been practiced in the Philippines and is considered ecologically sustainable. Trash fish is one of the best natural foods for fattening crab cultures. Meanwhile, stingray also contains plentiful proteins; however, they are not economically valuable in the southern Philippines, causing them to be discarded by most people owing to their unpleasant taste. Considering this, this study aimed to determine the effects of two different diets on mangrove crab fattening using modified plastic cages in mangroves. The experiment was conducted at Sitio Sindang, Indanan, Sulu, Philippines, for 30 days fattening period. Adult crabs (n=12) weighing 100 to 110 grams were reared in modified plastic cages measuring 17 cm x 24.5 cm x 6 cm. Plastic cages were partitioned into six compartments; each contained one crab. Two types of experimental feed, namely: stingray (Taeniura sp.) (chopped stingray) as Treatment 1 and trash fish (Sardinella sp.) (entrails of fish and chopped trash fish) as Treatment 2, were given to the experimental crabs. The amount of feed given to the crab was calculated based on the 10% body weight. The result showed that the use of stingrays as a source of feed was significantly higher (p>0.05) in the weight of mangrove crabs during the early ten days; however, the superiority disappeared after 30 days. Both treatments did not significantly (p
      PubDate: Fri, 30 Jun 2023 00:00:00 +030
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