An overview of the distribution, abundance and biological diversity of plankton in the direction of aquaculture development in Taham Dam lake

Document Type : Article

Authors

1 1Inland Waters Aquaculture Research center, Iranian Fisheries Science Research Institute (IFSRI).

2 Inland Water Aquaculture Reseach center - Bandar-e Anzali

3 Inland Waters Aquaculture Reseach center, Iranian Fisheries Science Research Institute

Abstract

Teham Dam is a lake located 15 kilometers northwest of Zanjan city, which besides its main use, which is the supply of drinking water, has many ecological values. In this plan, 6 study stations were considered in the area of the dam lake and its inlets and outlets. Surveys were conducted every 45 days in spring, summer and autumn. For phytoplankton sampling from each station, one liter of water without passing through the zooplankton net, and for zooplankton sampling, 30 liters of water was filtered by a manual zooplankton net (Apstein net) with a 55 micron mesh. Finally, the samples were fixed with 4% formalin and transferred to the laboratory for study. In phytoplankton surveys, a total of 5 branches and 41 phytoplankton genera were identified, among which Cyclotela and Asterionella from Ochrophyta and Ankistrodesmus and Chlorogonium from Chlorophyta were the most abundant. Acrophyta has 56.2% of the annual abundance of phytoplankton. In the zooplankton studies, 5 branches and 19 genera were identified, and the highest diversity and abundance is related to the Rotifera branch with the dominant genera Ascomorpha, Synchaeta and Pedalia and the Daphnia genus from the Arthropoda branch. Rotifera has 79.8% annual abundance of zooplankton. The comparison of planktonic observations and water environmental factors showed that the production in this dam lake depends on the water volume and the extent of the lake, and Tehmakhzani dam has the talent and suitable species of zooplankton for feeding and rearing fish and their larvae.

Keywords

Main Subjects

Ecology and Water Resources
Volume 6, Issue 2
October 2024
Pages 23-41

Files

Share

How to cite

Statistics