Hossain, Samiha, Md Mofizur Rahman, Masuma Akter, and Shuva Bhowmik
Abstract
The present study was designed to estimate zooplankton abundance qualitatively and quantitatively in various types of earthen fish ponds of Noakhali region, Bangladesh. Experimental ponds were categorized as culture, household and unused and samples were drawn from 15 May to 15 November, 2012 during the entire study period using a plankton net (90 µm mesh size). Zooplankton enumeration was done on Sedgewick-Rafter counting chamber (SR cell). Water quality parameters were measured and found within the optimal ranges for zooplankton growth. Temperature varied from 25-30 C; transparency, 25-43 cm; pH, 6.0-9.0; Dissolved Oxygen (DO), 3.50-5.00 mg L; conductivity, 338-573 ppm and salinity 0 ppt. Four groups of zooplankton viz.; Rotifera, 1 Cladocera, Copepoda and Crustacean larvae consisting of 14 genera were identified. Total zooplankton density was found 5550, 2655 and 1670 units/l respectively in culture, household and unused pond. Rotifera was found most dominant group with the density of 2100 ind/l, 983 ind/l and 1370 ind/l respectively in culture, household and unused pond. Lowest density was found for Cladocera with 890 ind/l, 500 ind/l and 200 ind/l respectively in culture, household and unused pond. In culture pond, percentage of Rotifers, Copepod, Cladocerans and Crustacean larvae were 38%, 23%, 16% and 23% respectively. In household pond, percentage composition of zooplankton group was 37%(Rotifers), 37%(Copepod), 19%(Cladocerans) and 7%(Crustacean larvae). And in unused pond, Rotifers, Copepod, Cladocerans and Crustacean larvae were found 53%, 27%, 8% and 12% respectively. Rotifer was found more abundantly (54%) in unused pond whereas Copepoda was in household pond (37%). The results of the present study can be used to measure the seasonal changes of water quality parameters and its effects on zooplankton production in the fish ponds.
World Journal of Fish and Marine Sciences 7 (5): 387-393, 2015
ISSN 2078-4589
© IDOSI Publications, 2015
DOI: 10.5829/idosi.wjfms.2015.7.5.95307
https://www.researchgate.net/profile/Shuva-Bhowmik/publication/288827388_Species_Composition_and_Abundance_of_Zooplankton_Population_in_Freshwater_Pond_of_Noakhali_District_Bangladesh/links/5684b17008ae197583938845/Species-Composition-and-Abundance-of-Zooplankton-Population-in-Freshwater-Pond-of-Noakhali-District-Bangladesh.pdf