Investigation of Phytoplankton and Physico-chemical Parameters in Nursery, Growout and Broodstock Ponds

Abstract

The study measures the relationship between physicochemical variables with the cell density of phytoplankton in different stages of pond – nursery ponds, grow out ponds and brood stock ponds. The study was conducted on nine fish ponds as three from each category of pond at Natore Government Fish Farm in Bangladesh, during the months of January to June in 2012. The observed physicochemical variables– water temperature, transparency, dissolved oxygen, pH, ammonia-nitrogen, total alkalinity and total hardness – were found within the standard ranges. Four groups of phytoplankton– Bacillariophyceae, Chlorophyceae, Cyanophyceae and Euglenophyceae– werefound among the ponds where Euglenophyceae was recorded highest number almost in all ponds over the study period. Total abundance of different groups of phytoplankton was recorded as mean (±SD) cell density (cell/l) 62.77±2.16×104, 47.22±0.69×104, and 77.12±3.42×104 in nursery pond, grow out pond and brood stock pond, respectively. Overall phytoplankton was found better in brood stock pond than others. Total phytoplankton density has been exhibited significantly positive correlation with DO and inverse relation with water temperature, pH, ammonia-nitrogen and total alkalinity in case of nursery pond. In case of grow out pond, total phytoplankton density has been exhibited significantly positive correlation with temperature and transparency, and significantly negative correlation with others physicochemical characteristics. In case of brood stock pond, total phytoplankton density has no significant relationship with any physicochemical variables of water.

Unravelling the diversity and assemblage of phytoplankton in homestead ponds of central coastal belt, Bangladesh

“…and Ulothrix spp. were found as the dominant genera by other researchers (Affan et al., 2005; Begum et al., 2007; Chowdhury et al., 2007; Hossain et al., 2013), which agrees with present study. According to cluster analysis, no significant isolation of phytoplankton genera cleared a constant pattern of the phytoplankton assemblages.…”

“…The high diversity of phytoplankton was observed in the homestead ponds with variation in dominant genus from station to station for the phytoplankton assemblage. High diversity of phytoplankton was also reported by other researchers (Begum et al., 2007; Chowdhury et al., 2007; Hossain et al., 2013; Khan & Bari, 2019; Khan et al., 2019). The phytoplankton genera such as Aphanizomenon sp., Aphanocapsa sp., Microcystis spp.…”

“…Maximum density of phytoplankton was 422.00 ± 48.50 × 10 4 cells L −1 and minimum was 52.00 ± 18.00 × 10 4 cells L −1 in the homestead ponds of Noakhali. Similar abundance of phytoplankton also found in the aquaculture ponds (Hossain, Alam, Alam, Kamal, & Galib, 2013; Khan et al., 2019) that signify the capability of homestead ponds for aquaculture. Phytoplankton abundance at different stations exhibited different trends may be due to variations in environmental parameters.…”

Recording Thirteen New Species of Phytoplankton in Euphrates River Environment in Iraq

“…This agrees with Tas et al [37] in Cernek Lake in Turkey, which may be due to their preference for moderate temperatures, as has been found by other studies [12]. Staurodesmus cuspidatus appeared in location 1 (pH 7.22), which was considered the lowest pH among other locations, while Stichosiphon sansibaricus appeared in summer season (June), which may be returned to increased temperature of water, as mentioned by Hossain et al [38] who reported that Cyanophyta had a positive correlation with the temperature of water in Nursery Lake in Bangladesh. Also, Phacus anacoelus var.…”

Diversity and distribution of plankton community and physico-chemical parameters in wishpond, wishpond-aquaponics system and traditional fish pond

“…Live organisms of the water consist of several groups and among these, plankton is very important for fish production. Phytoplankton is the basic of primary production of all types of water bodies and is used as food by fish directly or indirectly (Hossain et al, 2013). The microscopic plankton algae of the ponds are critical food for planktivorous fish species (carps) as well as the larvae of commercially important crustaceans and fin fishes.…”