Vertical distribution of zooplankton in Lake Nasser
The composition and distribution of zooplankton communities in three depths (surface, 10–5 m and 20–15 m depths) along main channel of Lake Nasser were studied in 2013. The density of total zooplankton was increased to maximum during winter and autumn at surface water (39,362 and 63,100 Ind. m−3, re...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2015-01-01
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| Series: | Egyptian Journal of Aquatic Research |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1687428515000217 |
| _version_ | 1818133396540358656 |
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| author | Nehad Khalifa Khaled A. El-Damhogy M. Reda Fishar Amr M. Nasef Mahmoud H. Hegab |
| author_facet | Nehad Khalifa Khaled A. El-Damhogy M. Reda Fishar Amr M. Nasef Mahmoud H. Hegab |
| author_sort | Nehad Khalifa |
| collection | DOAJ |
| description | The composition and distribution of zooplankton communities in three depths (surface, 10–5 m and 20–15 m depths) along main channel of Lake Nasser were studied in 2013. The density of total zooplankton was increased to maximum during winter and autumn at surface water (39,362 and 63,100 Ind. m−3, respectively) and gradually decreased with depth until attaining the lowest average density at 20–15 m (12,460 and 8976 Ind. m−3). During spring and summer, zooplankton was irregularly distributed through the water profile, where the highest average density was recorded at 10–5 m depth (66,007 and 66,734 Ind. m−3). Copepoda was the dominant zooplankton group at all depths, it represented about 70–76.2% of the total zooplankton count. Cladocera formed about 13.4%, 14.5% and 11% of total zooplankton density for surface, 10–5 m and 20–15 m depth. It was decreased with increasing depth during winter and autumn; however it attained its maximum density at 10–5 m depth during spring and summer. Rotifera average density decreased with increasing depth. The dominant zooplankton species inhabiting Lake Nasser were strongly temperature-dependent. The study recommends the introduction of some pelagic fish species to consume the high persistence of zooplankton community at the upper 10 meters of water column. |
| first_indexed | 2024-12-11T08:52:04Z |
| format | Article |
| id | doaj.art-e5e4c3db34724bf8b36c3b48b6cfeb7b |
| institution | Directory Open Access Journal |
| issn | 1687-4285 |
| language | English |
| last_indexed | 2024-12-11T08:52:04Z |
| publishDate | 2015-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Egyptian Journal of Aquatic Research |
| spelling | doaj.art-e5e4c3db34724bf8b36c3b48b6cfeb7b2022-12-22T01:14:00ZengElsevierEgyptian Journal of Aquatic Research1687-42852015-01-0141217718510.1016/j.ejar.2015.03.002Vertical distribution of zooplankton in Lake NasserNehad Khalifa0Khaled A. El-Damhogy1M. Reda Fishar2Amr M. Nasef3Mahmoud H. Hegab4National Institute of Oceanography and Fisheries, 101 Kasr El Aini Street, Cairo, EgyptZoology Department, Faculty of Science, Al-Azhar University, Cairo, EgyptNational Institute of Oceanography and Fisheries, 101 Kasr El Aini Street, Cairo, EgyptZoology Department, Faculty of Science, Al-Azhar University, Cairo, EgyptNational Institute of Oceanography and Fisheries, 101 Kasr El Aini Street, Cairo, EgyptThe composition and distribution of zooplankton communities in three depths (surface, 10–5 m and 20–15 m depths) along main channel of Lake Nasser were studied in 2013. The density of total zooplankton was increased to maximum during winter and autumn at surface water (39,362 and 63,100 Ind. m−3, respectively) and gradually decreased with depth until attaining the lowest average density at 20–15 m (12,460 and 8976 Ind. m−3). During spring and summer, zooplankton was irregularly distributed through the water profile, where the highest average density was recorded at 10–5 m depth (66,007 and 66,734 Ind. m−3). Copepoda was the dominant zooplankton group at all depths, it represented about 70–76.2% of the total zooplankton count. Cladocera formed about 13.4%, 14.5% and 11% of total zooplankton density for surface, 10–5 m and 20–15 m depth. It was decreased with increasing depth during winter and autumn; however it attained its maximum density at 10–5 m depth during spring and summer. Rotifera average density decreased with increasing depth. The dominant zooplankton species inhabiting Lake Nasser were strongly temperature-dependent. The study recommends the introduction of some pelagic fish species to consume the high persistence of zooplankton community at the upper 10 meters of water column.http://www.sciencedirect.com/science/article/pii/S1687428515000217Lake NasserVertical distributionZooplanktonCopepoda |
| spellingShingle | Nehad Khalifa Khaled A. El-Damhogy M. Reda Fishar Amr M. Nasef Mahmoud H. Hegab Vertical distribution of zooplankton in Lake Nasser Egyptian Journal of Aquatic Research Lake Nasser Vertical distribution Zooplankton Copepoda |
| title | Vertical distribution of zooplankton in Lake Nasser |
| title_full | Vertical distribution of zooplankton in Lake Nasser |
| title_fullStr | Vertical distribution of zooplankton in Lake Nasser |
| title_full_unstemmed | Vertical distribution of zooplankton in Lake Nasser |
| title_short | Vertical distribution of zooplankton in Lake Nasser |
| title_sort | vertical distribution of zooplankton in lake nasser |
| topic | Lake Nasser Vertical distribution Zooplankton Copepoda |
| url | http://www.sciencedirect.com/science/article/pii/S1687428515000217 |
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