Quantitative and qualitative survey on phytoplankton during rearing months in earthen ponds of warm water fish at Sijaval cultivation center

Subject Areas : New Technologies in Aquaculture Development

Received: 2021-02-03 Accepted : 2021-02-03 Published : 2014-08-23

Keywords: Keywords: Phytoplankton, Rearing ponds, Sijaval cultivation center,

Abstract :

Abstract[1] This study was carried out to evaluate the quantitative and qualitative variations of phytoplankton community during 4 months (April, May, June, July) in earthen ponds of warm water fishes with different phytoplankton production potential (weak, fair, suitable) according to the filed observations by the workshop specialists. Results indicated that amongst identified phytoplankton phyla during rearing seasons, the highest and the lowest percentage abundance (%) were belonged to Cyanophyta (54.48%) and Chlorophyta (0.67%), respectively. The most and the least values of phytoplankton diversity were observed in April with 41 genera and May with 27 genera. Analysis of monthly changes in cell abundance of genera from different phytoplankton phyla revealed no significant difference. There was no significant difference among phytoplankton abundances of each phyla in different rearing earthen ponds (P>0.05). Moreover, no significant difference was detected among cell abundances of different sampling months in each pond (P>0.05). Biodiversity indices analysis (Shannon, Simpson, Margalef and Evenness) showed no significant difference among various sampling months and different rearing ponds as well (P>0.05). These findings confirm undesirable condition in phytoplankton load of rearing ponds and their contamination to organic matter during the studied months.   * Corresponding Authors; Email: [e-mail]