Zooplankton Biomass and Density Using Two Mesh Sizes in Khor Al-Zubair, Iraq | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 142, Volume 29, Issue 4, July and August 2025, Page 2629-2642 PDF (552.51 K) | ||||
| DOI: 10.21608/ejabf.2025.446055 | ||||
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| Authors | ||||
| Alaa Maytham; Naeem Hammadi | ||||
| Abstract | ||||
| The study was conducted in Khor Al-Zubair in the northwest of the Arabian Gulf within the Basra Governorate, over a six-month period from January to June 2024. Three sampling stations were selected for the study. The first station is near the mangrove nursery at coordinates (30° 19' 20.2'' N, 47° 49' 02.6'' E). The second station is positioned near the command of the Iraqi naval force at (30° 13' 08.9'' N, 47° 51' 54.0'' E), while the third station is situated near the Free Zone at (30° 09' 10.2'' N, 47° 54' 09.5'' E). Zooplankton samples were collected using two types of Hydro-Bios plankton nets: one with a mesh size of 50μm and a nozzle diameter of 30cm, and another with a mesh size of 100μm and a nozzle diameter of 40cm. To calculate zooplankton density, expressed as individuals per liter (ind/L), results for the 50μm net showed a density of 0.2319ind/ L at the first station, 0.0374ind/ L at the second station, and 0.0179ind/ L at the third station. For the 100μm net, the density was 4.0982ind/ L at the first station, 3.2601ind/ L at the second station, and 1.9293ind/ L at the third station. The biomass of zooplankton was evaluated through several approaches, including wet weight, dry weight, displacement volume, and standing stock. In addition, environmental parameters such as water temperature, salinity, and dissolved oxygen were measured to assess their potential influence on zooplankton abundance and distribution. | ||||
| Keywords | ||||
| Biomass; Zooplankton; Khor Al-Zubair; Iraq | ||||
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