Impacts of cage culture on physico-chemical and bacteriological water quality in Lake Volta, Ghana

Clottey, Michelle Naa Kordei; Asmah, Ruby; Ofori-Danson, Patrick K.; Ameworwor, Miriam Yayra; Karikari, Anthony Yaw

doi:10.2989/16085914.2016.1255587

Cited by 9 publications

(12 citation statements)

References 10 publications

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“…However, the concentration observed for this study (0.16 mg/L) by far fell in line with the nitrate levels obtained by [22] in Lake Volta (0.2 -1.70 mg/L) and elsewhere in Nigeria (0.10 -2.60 mg/L) by [23]. The level of nitrate in the lake was far below the W.H.O limit of 10 mg/L.…”

Section: Nitratesupporting

confidence: 85%

Pesticide and Nutrient Loads of Lake Bosomtwe in the Ashanti Region of Ghana

Kuffour¹,

Essumang²,

Akotoye³

et al. 2021

JWARP

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Pollution of Lake Bosomtwe is a major concern in Ghana due to its derived socio-economic benefits such as employment, ecotourism and major protein source to the people in the basin. Besides these benefits, the lake water is used for domestic purposes and has since served as the drinking water source to the people. However, the use of agrochemicals within the basin has intensified within the last decade. The problems associated with fertilizer and pesticide use in the Bosomtwe basin seem to carry with it a higher price, which, if not identified and checked, will overshadow the desired benefits of the lake. This study assesses pesticide and nutrient loads of Lake Bosomtwe in the Ashanti Region of Ghana. Fifty-four (54) lake water samples were collected from September 2016 to February 2017. Pesticide samples were extracted using the solid phase extraction method and GCMS to identify the pesticides present in the water samples and determine their loads. The data obtained were analyzed using Statistical Product Service Solutions (SPSS version 20) for descriptive statistics. The concentration of dichlorvos was a bit lower when compared with the WHO/USEPA guidelines of 5 ppb for surface water. Diazinon had a mean concentration of 0.28 ± 0.03 ppb which was higher than the WHO 0.05 ppb and USEPA 0.04 ppb for surface water bodies. The detection of diazinon confirms the findings from the field survey, which revealed that diazinon, is an active ingredient of a pesticide with a trade name "Akate suro", which was extensively used by cocoa farmers along the banks of the lake. The mean concentration recorded for nitrate and phosphate were 0.15 ± 0.05 mg/L and 0.40 ± 0.12 mg/L respectively. The pesticides application inventory and implications of pesticide and nutrient loads on the lake are discussed in the paper.

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Section: Nitratesupporting

confidence: 85%

Pesticide and Nutrient Loads of Lake Bosomtwe in the Ashanti Region of Ghana

Kuffour¹,

Essumang²,

Akotoye³

et al. 2021

JWARP

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“…Phosphate-phosphorus is not harmful at low concentrations but becomes harmful at higher levels thus higher doses of phosphate tend to interrupt digestion in both humans and animals (Samah, 2012). The phosphate concentrations in this study was within the range obtained by Clottey et al (2016) which ranged from 0.057 -0.291 mg/l in stratum II of the Volta Lake. The phosphate levels observed in this study was also similar to Ameworwor (2014) who recorded 0.057 -0.29 mg/l and 0.029-0.43 mg/l at both farmed and control sites respectively.…”

Section: Fish Cage Culture Impact On Water Qualitysupporting

confidence: 83%

“…The counts were above the Water Resources Commission recommended limit of <1000cfu/100 ml of total coliforms for aquaculture. Clottey et al (2016) also observed TC levels of 132 -1708 cfu/100 ml in stratum II of the Volta Lake. The counts of faecal coliform bacteria at the farmed site was significantly higher than the control site (P = 0.046).…”

Section: Microbiological Quality Of the Study Areamentioning

confidence: 65%

“…According to Chapman (1992), waters that are not contaminated have little levels of ammonia normally smaller than 0.1 mg/l. Clottey et al (2016) also observed low ammonianitrogen levels at both farmed (<0.001 -0.444) and control (<0.001 -0.242) sites. The concentrations of ammonia-nitrogen in the study site during the study period was not alarming which may be due to low anthropogenic activities reaching the area.…”

Section: Fish Cage Culture Impact On Water Qualitymentioning

confidence: 77%

“…These values were comparable with observations by Clottey (2014) who recorded 56.68 μs/cm at the Kpeve section of the Volta lake, and Antwi & Ofori-Danson (1993 ) 62.0 -77.5 µs/cm at Kpong., the low conductivity values confirms the low ionic content of the Volta Lake (Karikari et al, 2013). According to Clottey et al (2016), the low ionic content of the Volta Lake which indicates its low conductivity makes it favourable for the growth of aquatic life. Turbidity reflects the existence of dissolved and suspended organic and inorganic materials and also plankton and other microorganisms.…”

Section: Fish Cage Culture Impact On Water Qualitymentioning

confidence: 99%

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Effects of Fish Cage Culture on Water and Sediment Quality in the Gorge Area of Lake Volta in Ghana: A Case Study of Lee Fish Cage Farm

Osei¹,

Asmah²,

Aikins

et al. 2019

gjs

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The study determined the impacts of fish cage farming on the gorge area of Lake Volta. Water and sediment samples were collected from six sites in the Lee Cage Farm; four from sections with cages and two from about 1300 m upstream of the farm which served as the control. Water quality variables monitored were pH, temperature, dissolved oxygen, nitrate-nitrogen, ammonia-nitrogen, orthophosphate, faecal coliforms and total coliforms. Variables monitored in the sediment were organic matter, total carbon, total nitrogen and total phosphorus. There were variations in water quality between the farmed and control sites but the differences were not significant (p > 0.05). The mean counts of total coliform in the water ranged from 940 - 3318 cfu/100 ml while faecal coliforms ranged from 113 - 552 cfu/100 ml at the farmed site. The mean total coliform count at the control site ranged from 837 - 6960 cfu/100 ml while the faecal coliforms ranged from 48 - 120 cfu/100 ml. Therefore, there was significant variation between the faecal coliforms count at the two sites (p = 0.046). The results suggest that the general microbiological quality of the water at the study area was unacceptable.

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Contaminants of Emerging Concern in the Lower Volta River, Ghana, West Africa: The Agriculture, Aquaculture, and Urban Development Nexus

Chester

Gordon

Hartmann

et al. 2022

Enviro Toxic and Chemistry

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Contaminants of emerging concern (CECs) are ubiquitous in aquatic environments across all continents and are relatively well known in the developed world. However, few studies have investigated their presence and biological effects in low‐ and middle‐income countries. We provide a survey of CEC presence in the Volta River, Ghana, and examine the microbial consequences of anthropogenic activities along this economically and ecologically important African river. Water and sediment samples were taken by boat or from shore at 14 sites spanning 118 km of river course from the Volta estuary to the Akosombo dam. Sample extracts were prepared for targeted analysis of antimicrobial CECs, N,N‐diethyl‐meta‐toluamide, and per‐ and polyfluoroalkyl substances (PFAS; water only). Concurrent samples were extracted to characterize the microbial community and antibiotic‐resistant genes (ARGs). Antibiotics and PFAS (PFAS, 2–20 ng/L) were found in all water samples; however, their concentrations were usually in the low nanograms per liter range and lower than reported for other African, European, and North American studies. N,N‐Diethyl‐meta‐toluamide was present in all samples. The number of different genes detected (between one and 10) and total ARG concentrations varied in both water (9.1 × 10−6 to 8.2 × 10−3) and sediment (2.2 × 10−4 to 5.3 × 10−2), with increases in gene variety at sites linked to urban development, sand mining, agriculture, and shellfish processing. Total ARG concentration spikes in sediment samples were associated with agriculture. No correlations between water quality parameters, CEC presence, and/or ARGs were noted. The presence of CECs in the lower Volta River highlights their global reach. The overall low concentrations of CECs detected is encouraging and, coupled with mitigation measures, can stymie future CEC pollution in the Volta River. Environ Toxicol Chem 2022;41:369–381. © 2021 SETAC

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Impacts of cage culture on physico-chemical and bacteriological water quality in Lake Volta, Ghana

Cited by 9 publications

References 10 publications

Pesticide and Nutrient Loads of Lake Bosomtwe in the Ashanti Region of Ghana

Pesticide and Nutrient Loads of Lake Bosomtwe in the Ashanti Region of Ghana

Effects of Fish Cage Culture on Water and Sediment Quality in the Gorge Area of Lake Volta in Ghana: A Case Study of Lee Fish Cage Farm

Contaminants of Emerging Concern in the Lower Volta River, Ghana, West Africa: The Agriculture, Aquaculture, and Urban Development Nexus

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