Influence of pig dung dose on zooplankton productivity in microcosm
Songmo Berlin, Nana Towa Algrient, Efole Ewoukem Thomas, ET Tchoumboue
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.
Songmo Berlin, Nana Towa Algrient, Efole Ewoukem Thomas, ET Tchoumboue. Influence of pig dung dose on zooplankton productivity in microcosm. International Journal of Fisheries and Aquatic Research, Volume 3, Issue 3, 2018, Pages 28-34