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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]
  • Histological changes in juvenile common carp (Cyprinus carpio L.) fed on
           high levels of chromium chloride hexahydrate

    • Authors: Arafat AHMED; Genan AL-BAİRUTY, Raghda A. KAREEM
      Abstract: We designed this experiment to examine the impact of high levels of dietary Cr(III) on the histological structure of the gut, liver, kidney and spleen of the juvenile common carp (Cyprinus carpio L.; average weight 15 ± 0.69 g). Fish were fed on different levels of dietary Cr as chromium chloride CrCl3.6H2O (0.0, 4.0, 6.0 and 8.0 mg) Cr/kg diet for 10 weeks at 25 ± 1.5ºC. At the end of the experiment, no mortalities were recorded. High levels of dietary Cr impaired the normal histological structure of the tested organs. Different Cr treatments showed signs of toxicity in the liver and gut that involved the appearance of foci of inflammatory cells, pyknotic nuclei, foci of melanomacrophages, vacuole formation, degeneration of hepatocytes and erythrocytes aggregation in the liver and lifting of the lining epithelium, vacuolation, surface erosion in the intestine. The kidney of Cr treatments showed remarkable changes that include renal tubular separation, cytoplasmic vacuolation, aggregation of red blood cells, degeneration of renal tubules, necrosis of hematopoietic tissue and oedema. Injuries and damage were observed in the spleens of fish fed with Cr-fortified diets, including necrosis, depletion of lymphoid tissues and vacuoles formation. In conclusion, ingestion of high levels of dietary Cr (III) generated adverse health effects, and the application of Cr (III) in fish diets should be cautious.
      PubDate: Fri, 01 Jul 2022 00:00:00 +030
  • The Biggest Black Sea Salmon (Salmo labrax PALLAS, 1814) in Turkey

    • Authors: Eyüp ÇAKMAK
      Abstract: Salmonids are one of the species that is widely distributed in the world and have strong cultivation characteristics. Therefore, many studies have been conducted on the bioecological characteristics, culture characteristics, meat yield and quality of salmonid species. However, there are very few reports on the biggest known sizes of these species. This study was prepared to introduce the largest Black Sea salmon (Salmo labrax PALLAS, 1814) caught in the Black Sea Region of Turkey. In addition, this study is the first to introduce the largest Black Sea salmon in our country.
      PubDate: Fri, 01 Jul 2022 00:00:00 +030
  • Overview of Fish Farming Using Floating Cages along the Shatt al-Arab
           River in Basrah Province, Southern Iraq

    • Authors: Arafat AHMED
      Abstract: The current study was carried out during the period of September 2018–March 2019 aiming at providing an overview of fish farming projects using floating cages in Basrah province, southern Iraq. The primary strategy for data collection was through a questionnaire. The study showed that the first cage farm was established in Abul-Khaseeb district in 2008, and the number of certified farms is 37 with a total number of 466 cages. Cultivated carp fish were obtained from local hatchers in Basrah and Babylon. Fish farms are similar in the quality of feed used, cages' design, and raw materials involved in their manufacture. The results also showed that fish farmers are educated, and more than 40% of them are university graduates. In Basrah, women have a vital role in the operation, maintenance, and management of fish farms as well. The total production of certified farms in the province amounted to 544 tons per season. The survey results showed that cage farming in Shatt al-Arab is profitable in the absence of the saltwater intrusion phenomenon.
      PubDate: Fri, 01 Jul 2022 00:00:00 +030
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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