Enhancing local fish production through cage aquaculture on the Volta Lake: Impacts on capture fisheries

Ameworwor, Miriam Yayra; Asmah, Ruby; Danson, Patrick K Ofori; Clottey, Michelle N. K.

doi:10.5455/jfcom.20190313031430

Cited by 4 publications

(3 citation statements)

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“…A key objective of the Ghana National Aquaculture Development Plan is to increase output from aquaculture to make up for the short fall in domestic supply from capture fisheries (Fisheries Commission, 2012). Concerns have been raised about the potential impacts of increased cage tilapia production on the ecology of the lake and its other uses (Ameworwor et al, 2019; Asmah et al, 2014). Furthermore, Rurangwa et al, (2015) reported 1200 cages were recently abandoned by producers.…”

Section: Introductionmentioning

confidence: 99%

Waterbody scale assessment using spatial models to identify suitable locations for cage aquaculture in large lake systems: A case study in Volta Lake, Ghana

Asmah

Falconer

Telfer

et al. 2021

Aquaculture Research

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Section: Introductionmentioning

confidence: 99%

Waterbody scale assessment using spatial models to identify suitable locations for cage aquaculture in large lake systems: A case study in Volta Lake, Ghana

Asmah

Falconer

Telfer

et al. 2021

Aquaculture Research

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“…Therefore, the current study shows no influence of cage farms on physico-chemical water parameters. However, slightly higher Chl-a values at the caged station showed possibilities of fish excretion and excess feed which produce necessary nutrients of nitrogen and phosphorus for algal bloom (Demirak et al, 2006;Nyanti et al, 2012;Ameworwor, 2014).…”

Section: Physico-chemical Parameters Nutrients and Chlorophyll Amentioning

confidence: 99%

Environmental impacts of tilapia fish cage aquaculture on water physico-chemical parameters of Lake Kivu, Democratic Republic of the Congo

Lubembe,

Walumona,

Hyangya

et al. 2024

Front. Water

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In Africa, cage aquaculture has been growing due to its potential to address food insecurity concerns, provide livelihoods, and contribute to local economies. However, there is a need for continued research on the sustainability and potential ecological effects of cage aquaculture in African lakes and reservoirs. Even with an adequate amount of water, lakes and reservoirs cannot provide ecosystem services if their water quality is not properly managed. The current study on Lake Kivu, DRC focuses on understanding the effects of tilapia cage aquaculture on selected water quality physico-chemical parameters in the Bukavu sub-basin, DRC. The research was conducted in both caged and uncaged sampling stations, on the spatial and temporal scale from April to September 2023 at three bays serving as sampling stations: two caged (Ndendere, Honga) and one non-caged (Nyofu). Some physico-chemical parameters were measured in situ, whereas chlorophyll a and nutrients analysis were performed at the Institut Supérieur Pédagogique (I.S.P) laboratory in Bukavu. The parameters were used to calculate three indices water quality indices: the water quality index (WQI) to classify the water quality at the stations, the organic pollution index (OPI) to determine the level of organic pollution, the Carlson's Trophic Status Index (CTSI) to classify the trophic state of the stations. Chlorophyll a concentration was a measure of algal biomass. All physico-chemical parameters, apart from DO, ammonium and temperature showed no significant differences among stations and depths. Interaction between stations and between seasons was only observed on turbidity. The WQI for all the sampling stations ranged from medium to good quality (51–90). The OPI for all stations showed minimal level of pollution (4.6–5.0) hence lake's water still organically unpolluted. CTSI results indicated the sampling stations are in a eutrophic state (50 to 70). Fish cage aquaculture does not yet pose harm to the water quality of the two Lake Kivu stations under consideration, according to the study's findings. However with the anticipated growth of cage fish farming activities to meet the rising fish demand, continuous monitoring of water quality in the Lake should be done to inform management decisions and for sustainable aquaculture.

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“…According to [11], Ghana's aquaculture surged at the quickest pace among African countries, at 28% per year from 2006 to 2019. Tis is due to cage aquaculture farming along Lake Volta, well-established breeding procedures, the existence of suitable sites, and signifcant research and development programmes [12,13]. Unfortunately, in late 2018, the infectious spleen and kidney necrosis virus (ISKNV) emerged across tilapia farms in Lake Volta, resulting in substantial fsh mortality in cage systems [14] and hence a decline from 76,000 to 52,000MT in 2018 and 2019, respectively [15].…”

Section: Introductionmentioning

confidence: 99%

Profitability Analysis of Small-Scale Cage Aquaculture Farms in the Volta Lake of Ghana

Magna,

Mensah,

Mabe

et al. 2023

Aquaculture Research

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In Ghana, aquaculture offers acceptable opportunities for generating income. Cage aquaculture has a lot of potential for growth in Lake Volta. In this region, cage aquaculture farmers perform aquaculture in a variety of ways that fall into three major groups: commercial, medium scale, and small scale. In this study, the profitability and production economics of small-scale aquaculture operations in Lake Volta were examined. The average total revenue accrued and the average total costs of production were Gh₵395231.25 and Gh₵267970.15, respectively. The overall gross margin and net return for all the farms were Gh₵130294.02 and Gh₵127,261.10 per cycle, respectively. The overall assessment of the profitability performance indicators such as the benefit-cost ratio (BCR), the return on investment (ROI), the net present value (NPV), the operating expense ratio (OE), the operating profit margin (OPM), and the gross margin ratio (GMR) were 1.47, 47.49%, Gh₵407625.47, 0.77%, 32.20%, and 33.00%, respectively. These indicators showed that small-scale cage fish farming in the study area is profitable. The sensitivity analysis further demonstrated that small-scale cage fish production was robustly profitable. In light of this, the study suggests that stakeholders educate small-scale cage aquaculture farmers on the profitability of the business and make a concerted effort to teach and equip farmers with best management practises (BMPs), water quality management, feeds, and feeding management.

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Enhancing local fish production through cage aquaculture on the Volta Lake: Impacts on capture fisheries

Cited by 4 publications

References 0 publications

Waterbody scale assessment using spatial models to identify suitable locations for cage aquaculture in large lake systems: A case study in Volta Lake, Ghana

Waterbody scale assessment using spatial models to identify suitable locations for cage aquaculture in large lake systems: A case study in Volta Lake, Ghana

Environmental impacts of tilapia fish cage aquaculture on water physico-chemical parameters of Lake Kivu, Democratic Republic of the Congo

Profitability Analysis of Small-Scale Cage Aquaculture Farms in the Volta Lake of Ghana

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