Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, Oman
Harmful Algal Blooms (HABs) can have a significant impact on the distribution and survival of coastal fishes and invertebrates, and consequently they can affect local economies where fishing is an important activity. In October 2005, extensive algal blooms with brownish/orange discoloured water and...
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| Format: | Article |
| Language: | English |
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Sultan Qaboos University
2008-01-01
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| Series: | Journal of Agricultural and Marine Sciences |
| Subjects: | |
| Online Access: | https://journals.squ.edu.om/index.php/jams/article/view/681 |
| _version_ | 1828770658385920000 |
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| author | Saud S. Al Busaidi Khalfan M. Al Rashdi Hamed M. Al Gheilani Shehla Amer |
| author_facet | Saud S. Al Busaidi Khalfan M. Al Rashdi Hamed M. Al Gheilani Shehla Amer |
| author_sort | Saud S. Al Busaidi |
| collection | DOAJ |
| description | Harmful Algal Blooms (HABs) can have a significant impact on the distribution and survival of coastal fishes and invertebrates, and consequently they can affect local economies where fishing is an important activity. In October 2005, extensive algal blooms with brownish/orange discoloured water and fish mortalities were observed east of Masirah Island. Satellite images revealed cooler upwelled surface water along a broad front just prior to the event, followed by a gradual warming period coinciding with the mortalities. Depth profiles of dissolved oxygen (DO), temperature, salinity and pH taken on 19th October (during the fish mortality event) showed a pronounced thermocline at ~15 m depth and minimum DO of 0.82 ml/L at 25 m depth, and a slight improvement in DO to 1.3 ml/L was measured on 22nd October (after the event). Demersal fishes of several families were prominent among mortalities. No bacterial infestation was found in fish samples and no human poisoning was reported. Planktological data showed that marine dinoflagellates Noctiluca scintillans and Prorocentrum micans and toxic blooms of cyanobacterium Trichodesmium erythraeum were present. |
| first_indexed | 2024-12-11T14:11:08Z |
| format | Article |
| id | doaj.art-2b318106ba984392b7a94d9070bb902b |
| institution | Directory Open Access Journal |
| issn | 2410-1060 2410-1079 |
| language | English |
| last_indexed | 2024-12-11T14:11:08Z |
| publishDate | 2008-01-01 |
| publisher | Sultan Qaboos University |
| record_format | Article |
| series | Journal of Agricultural and Marine Sciences |
| spelling | doaj.art-2b318106ba984392b7a94d9070bb902b2022-12-22T01:03:26ZengSultan Qaboos UniversityJournal of Agricultural and Marine Sciences2410-10602410-10792008-01-01130647210.24200/jams.vol13iss0pp64-72665Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, OmanSaud S. Al Busaidi0Khalfan M. Al Rashdi1Hamed M. Al Gheilani2Shehla Amer3Ministry of Fisheries Wealth, Marine Science & Fisheries Center, Muscat, OmanMinistry of Fisheries Wealth, Aquaculture Center, Muscat, OmanMinistry of Fisheries Wealth, Marine Science & Fisheries Center, Muscat, OmanNizwa University, Nizwa, OmanHarmful Algal Blooms (HABs) can have a significant impact on the distribution and survival of coastal fishes and invertebrates, and consequently they can affect local economies where fishing is an important activity. In October 2005, extensive algal blooms with brownish/orange discoloured water and fish mortalities were observed east of Masirah Island. Satellite images revealed cooler upwelled surface water along a broad front just prior to the event, followed by a gradual warming period coinciding with the mortalities. Depth profiles of dissolved oxygen (DO), temperature, salinity and pH taken on 19th October (during the fish mortality event) showed a pronounced thermocline at ~15 m depth and minimum DO of 0.82 ml/L at 25 m depth, and a slight improvement in DO to 1.3 ml/L was measured on 22nd October (after the event). Demersal fishes of several families were prominent among mortalities. No bacterial infestation was found in fish samples and no human poisoning was reported. Planktological data showed that marine dinoflagellates Noctiluca scintillans and Prorocentrum micans and toxic blooms of cyanobacterium Trichodesmium erythraeum were present.https://journals.squ.edu.om/index.php/jams/article/view/681red tide, upwelling, fish mortalities, arabian sea, oman |
| spellingShingle | Saud S. Al Busaidi Khalfan M. Al Rashdi Hamed M. Al Gheilani Shehla Amer Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, Oman Journal of Agricultural and Marine Sciences red tide, upwelling, fish mortalities, arabian sea, oman |
| title | Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, Oman |
| title_full | Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, Oman |
| title_fullStr | Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, Oman |
| title_full_unstemmed | Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, Oman |
| title_short | Hydrographical Observations during a Red Tide with Fish Mortalities at Masirah Island, Oman |
| title_sort | hydrographical observations during a red tide with fish mortalities at masirah island oman |
| topic | red tide, upwelling, fish mortalities, arabian sea, oman |
| url | https://journals.squ.edu.om/index.php/jams/article/view/681 |
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