Vol. 3, Issue 3 (2018)
Influence of pig dung dose on zooplankton productivity in microcosm
Author(s): Songmo Berlin, Nana Towa Algrient, Efole Ewoukem Thomas, ET Tchoumboue
Abstract: An experiment on the influence of pig dung dose on the production of zooplankton was conducted in microcosm for 28 days. The experimental plan consisting of 5 treatments corresponding to the D0 (control), D10, D15, D20 and D25 g per 50 l of water was randomly distributed and in three replicates in 15 identical plastic containers of capacity. 60 l. One third (1/3) of each fertilizer dose was administered once a week as maintenance fertilizer. The zooplankton was seeded with a density of 12; 11 and 2 ind / l respectively of rotifers, copepods and cladocerans. Physico-chemical and zooplanktonic characteristics were collected every 7 days. Mean values of all physico-chemical characteristics of water remained very close to one dose and showed no significant difference (p> 0.05). The highest density values (6914.2 ind / l) and zooplankton biomass (1139.14 μgPS / l) were obtained with the D25 g dose, followed by 5448.2 ind / l and 626, 27 μgPS / l respectively with the dose D20 g. The lowest density values (606.4 ind / l) and the lowest zooplankton biomass (93.91 μgPS / l) were recorded with the dose D0 g. The D25 g positively increased the nutrient content in the water as well as the production of zooplankton.
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