Trophic status and phytoplankton diversity of two dam ponds in Eastern Cameroon (Central Africa)

Tenkeu, Janvier Kengne; Kayo, Raoul Polycarpe Tuekam; Tchapgnouo, Joseph Guy Nzieleu; Tchakonté, Siméon; Kamdem, Gwladys Joelle Mogue; Medjo, Pascale Banga; Kueppo, Eric Joselly Kouedem; Edoa, François Désiré Owona; Tsane, Cécile Rita Boudem; Togouet, Serge Hubert Zébazé

doi:10.22161/ijeab.61.19

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…These microorganisms are mostly filter feeders of small organic particles (fresh algal detritus and bacteria) (16). Their presence in Bertoua can therefore be related to the relatively high algal biomass blooms in this pond (17). In terms of relative abundance, rotifers appeared more important than cladocerans.…”

Section: Structure Of Zooplankton Groupsmentioning

confidence: 93%

Specific diversity and abundance of communities of microcrustaceans and rotifers in two ponds, Mokolo and Mopa in the city of (Bertoua, Cameroon)

Joelle¹,

Janvier²,

Nvondo³

et al. 2022

World J. Adv. Res. Rev.

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One of the major challenges of aquatic ecology is to understand how anthropization affects biodiversity and what the consequences on the functioning of hydrosystems. Physicochemical and zoolanktonic variables studied in two ponds (Mokolo and Mopa) in the city of Bertoua, with two sampling stations (surface and depth) per pond and data collected monthly from March 2016 to April 2017 (14 months) allowed us to appreciate the spatial and seasonal dynamics of zooplankton in relation to anthropogenic disturbances. Abiotic variables of the ponds show that they are highly anthropized with relatively high temperatures (> 23 °C), low water transparency (< 70 cm) despite the shallow depth of the ponds (< 170 cm), average oxygenation (> 50%) with hypoxia (< 35%) recorded in the rainy season, high mineralization of the waters, high levels of nutrients, organic matter and photosynthetic pigments (> 30 µg/L). These characteristics allow to classify these water bodies in the category of hypereutrophic ponds. Biological data show fairly diverse ponds with 63 species identified in Mokolo Pond representing 17.89% of the total abundance. In Mopa Pond, 75 species were identified representing 21.30% of the total abundance. This study allowed us to deduce that the structure and dynamics of microcrustaceans communities are under the control of different processes that interact simultaneously. It is mainly influenced by the season, predation and by the depth of sampling, the month and the station having no influence on this distribution.

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Section: Structure Of Zooplankton Groupsmentioning

confidence: 93%

Specific diversity and abundance of communities of microcrustaceans and rotifers in two ponds, Mokolo and Mopa in the city of (Bertoua, Cameroon)

Joelle¹,

Janvier²,

Nvondo³

et al. 2022

World J. Adv. Res. Rev.

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“…Several works have been carried out on determining water quality in pond systems [24][25][26][27][28][29][30]; in aquaponics systems [10], in concrete tanks [25,30,31] and in tanks [32][33][34][35][36][37]. Based on literature, there are studies on the effect of commercial and local feeds on the water quality of C. gariepinus reared in flow-through holding tanks [35,38].…”

Section: Introductionmentioning

confidence: 99%

Water Quality Effects on Survival and Weight of Tank-Raised African Catfish (Clarias gariepinus, Burchell, 1822) Fed Commercial and Farm-made Feeds

Nindum,

Tchiedjo Marie Laure D.,

Boudem Tsane Cecile R.

et al. 2023

JEAI

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The present study was carried out to assess the effect of water quality on survival and weight of tank-raised Clarias gariepinus fed with commercial and farm-made feeds. Nine hundred juveniles (15.15± 3.48g; 128.366± 9.67mm) were stocked in 09 IBC (Intermediate Bulk Container) tanks (1m3 each) at a density of 100 fish/tank and fed with imported (Le), locally pelleted (Lpe) and locally extruded (Lex) feeds thrice a day for 16 weeks. Water quality parameters (water temperature, suspended particles, turbidity, colour, total dissolved solids, electrical conductivity, pH, dissolved oxygen, nitrates, nitrites, ammonia and phosphates) were measured every fortnightly using standard methods. Survivals were determined from the initial and final counts of studied fish and body weight was determined biweekly using a sensitive electronic balance. Regardless of dietary treatments and rearing period, studied water parameters did not differ significantly (p>0.05) except for Total Dissolved Solids (TDS), electrical conductivity (EC), pH and nitrites (p<0.05). The study also revealed that all the parameters were within acceptable or desirable ranges for fish farming except for dissolved oxygen and ammonia which were below (<3mg/l) and above (>0.05mg/l) optimal recommended ranges respectively. In addition, water temperature, turbidity, total dissolved solids, pH and ammonia had a significant effect (p<0.05) on the survival and weight of African catfish. The study concluded that dissolved oxygen and ammonia could have detrimental effects on studied fish growth. However, the fact that the studied fish were exposed short term in holding water as an exchange of water was carried out every day and a complete exchange every fortnightly with well oxygenated water, significantly contributed in reducing the abnormal contents of dissolved oxygen and ammonia. This implies that if best management practices are respected, the studied feeds will not deteriorate holding tank waters and thus not affect fish productivity.

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Trophic status and phytoplankton diversity of two dam ponds in Eastern Cameroon (Central Africa)

Cited by 2 publications

References 9 publications

Specific diversity and abundance of communities of microcrustaceans and rotifers in two ponds, Mokolo and Mopa in the city of (Bertoua, Cameroon)

Specific diversity and abundance of communities of microcrustaceans and rotifers in two ponds, Mokolo and Mopa in the city of (Bertoua, Cameroon)

Water Quality Effects on Survival and Weight of Tank-Raised African Catfish (Clarias gariepinus, Burchell, 1822) Fed Commercial and Farm-made Feeds

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