Authors : Alalibo, B.; Ehiedu, K. P.

Volume/Issue : Volume 11 - 2026, Issue 3 - March

Google Scholar : https://tinyurl.com/4xevsv4a

Scribd : https://tinyurl.com/mpf8eehw

DOI : https://doi.org/10.38124/ijisrt/26mar2088

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Abstract : The abattoir and industrial waste cause a great impact on the zooplankton communities by depleting dissolved oxygen, increasing nutrient level and species abundance and distribution. This study reveals the variation in physicochemical parameters and the effect of industrial waste and industrial waste on zooplankton abundance and diversity in New Calabar River, Choba, Nigeria. The study area was located on the eastern side of the lower Niger Delta river which is about 15km from Port Harcourt and 98km long with three sampling stations- Abattoir (Station 1), indomie discharge facility (station 2), dredging (station 3) within the study location. Samples were collected once a month for six (6) months (March – May, 2015). Results obtained for the mean monthly variations of physicochemical parameter are pH 6.30±0.09 - 6.80±0.06, temperature ranged between 25.00±0.00 0C - 28.00±1.00 0C salinity between 13.43±2.11- 17.00±1.53 ppt, Total Dissolved Solids range between 17.97±2.95 - 23.27±0.92mg/L, Transparency had the values (56.17±1.09m - 86.60±3.10m, phosphates ranged from 0.02±0.00mg/L - 0.11±0.03mg/L, nitrates 0.11±0.02mg/L - 0.82±0.060mg/L, Biological Oxygen Demand ranged from 20.00±2.31mg/L - 27.00±1.26mg/L and Dissolved Oxygen ranged from 2.70±0.35mg/L - 7.40±0.03mg/L. Three zooplankton phyla were recorded, they were dominated by Copepoda with the highest abudance made up of Anomalocera patersoni, Temora lungicornis, Centropages typicus, Calanus finmarchicus, Pseudocalanus elongatus, then the Cladocera made up of Bosmina longirostris, Alona affinis, Moina dubia, Trichura spp and then the Ostracoda with the least abundance Conchoecia spp. The highest species diversity, richness and evenness value in Shannon-Weiner index, Specie evenness index, Margalef index and Simpson index was found in station one. It was concluded that the discharge of industrial and abattoir waste causes the disruption of water quality and abundance and distribution of zooplankton. Therefore, there should be regular monitoring of the water status.

Keywords : Abattoir, Industrial Waste, Abundance, Distribution, Zooplankton.

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