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Document Type |
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Thesis |
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Document Title |
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Effect of parasites and heavy metals on Carangoides bajad fish in the Red Sea , Jeddah: Histological and Physiological Studies تأثير الطفيليات والمعادن الثقيلة على أسماك بياض قز في البحر الأحمر - جده :دراسة نسيجية وفسيولوجية |
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Subject |
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Faculty of Science |
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Document Language |
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Arabic |
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Abstract |
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Carangoides bajad fish have economic value and extensive distribution in the Red Sea. Parasites are essential parts of the environment and offer useful information about the hosts and the setting in which they live. Metals are taken up from the aquatic ecology and stored in the muscle tissues and organs of fish. The aim of the present study was to examine stomach,intesten,liver,spleen of C. bajad fish and clarified the histological response due to helminths infection and heavy metals exposure. Also, determine the role of gastrointestinal helminthes in bioremidiating some heavy metals in the muscle tissues of the C. bajad fish was studied. Such studies are poorly discussed in Saudi Arabia. A total of 142 fish were collected randomly from Al-Shoaiba in the Red Sea, Jeddah coast, during the period of July 2020 to June 2021. The intestinal helminthes were collected and processed after the fish were examined. Parasites were identified using morphological and molecular characteristics using a taxonomy keys and gene bank. Flame atomic absorption spectrometry was used to determine the concentration of elements in infected and non-infected fish and parasites. There was much damage such as necrosis, irregularity in the form and size of mucosa layer stomach, necrosis in all layer of intestines and degenerated villus, leucocytic infiltration, isolated of anisakid nematode larvae in the liver within a granuloma, and the inflammatory constituents were concluded within the thickness of the granuloma and increased number melanomacrophage centers (MMCs) in the spleen tissue. The total infection percent in the C. bajad fish was 88%. The most prevalent infected fish weight was 701-1200g with length 36-41.9cm. Three species of Trematoda, one species of Cestoda and tow species of Nematoda were recorded from the body cavity and gastrointestinal system. Mean concentrations of individual heavy metals in cestode, nematode and trematode parasites increased in the order Cd>As > Fe > pb > Zn. Infected fish tissues showed a significant decrease in most heavy metals and the parasites; Cestoda & Nematoda indicated much higher detection skills of metals in the examined parasites than fish organs. Infections with helminthes in marine fish are a biological indication of heavy metal pollution, and their presence can reduce heavy metal bioaccumulation in fish tissues and organs. |
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Supervisor |
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Prof. Osama A. Abuzinadah |
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Thesis Type |
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Doctorate Thesis |
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Publishing Year |
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1444 AH
2023 AD |
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Co-Supervisor |
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Dr. Amaal H. Hassan |
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Added Date |
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Thursday, June 29, 2023 |
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Researchers
| صفاء عبدالله العويضي | Alowaidi, Safaa Abdullah | Researcher | Doctorate | |
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