African Journal of Aquatic Science最新文献

South African coastal outlets and estuaries: what defines an estuary versus an outlet? 南非沿海出海口和河口：河口和出海口的定义是什么？

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-12-15 DOI: 10.2989/16085914.2023.2288342

A. Whitfield

引用次数: 0

Water quality monitoring and measuring physicochemical parameters using wireless sensor networks 利用无线传感器网络进行水质监测和理化参数测量

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-12-13 DOI: 10.2989/16085914.2023.2277955

N. Satyanarayana Murthy, SF Ahamed

引用次数: 0

A bibliometric study on diatom DNA meta-barcording for water quality monitoring: a global perspective 用于水质监测的硅藻 DNA 元记录文献计量学研究：全球视角

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-12-13 DOI: 10.2989/16085914.2023.2282493

EO Mbao, J. Nyika, T. Sheng, B. Ochieng, L. Sitoki, SO Oduor, N. Kitaka, L. Olaka, C. Tan

引用次数: 0

Analysis of freshwater diatom deformities in the Karoo, South Africa 南非卡鲁淡水硅藻畸变分析

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-12-11 DOI: 10.2989/16085914.2023.2282491

M. Holmes, EE Campbell, M. de Wit, J.C. Taylor

引用次数: 0

Effect of abattoir activities on the quality of water and surrounding soil of the Anwai River in Asaba, Nigeria 屠宰场活动对尼日利亚阿萨巴 Anwai 河水质和周围土壤的影响

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-10-02 DOI: 10.2989/16085914.2023.2288346

OT Fatunsin, IG Enenya, P. Ebomese

{"title":"Effect of abattoir activities on the quality of water and surrounding soil of the Anwai River in Asaba, Nigeria","authors":"OT Fatunsin, IG Enenya, P. Ebomese","doi":"10.2989/16085914.2023.2288346","DOIUrl":"https://doi.org/10.2989/16085914.2023.2288346","url":null,"abstract":"The Anwai River is the most important river in Asaba, Nigeria, because of its many uses, and these include abattoir activities. The aim of this study was to assess the surface water and surrounding soil of the Anwai River for the effects of abattoir activities during the wet and dry seasons of 2020. The quality of soil and water samples was analysed using standard procedures as set by the American Public Health Association. Results of water analyses showed that pH, total dissolved solids and total suspended solids varied from 6.45 to 6.67, 13.50 mg L−1 to 24.42 mg L−1, and 2.19 ± 0.04 mg L−1 to 10.79 mg L−1, respectively. Soil pH, total organic content, Pd and Cr had a range of 5.83 to 7.65 pH units, 0.15 to 2.74%, 1.88 ± 0.03 to 22.8 ± 0.28 mg kg−1, and 0.86 ± 0.03 to 4.87 ± 0.04 mg kg−1, respectively. There were significant differences between Upstream, Midstream (by the abattoir) and Downstream samples; however, there were no significant differences between dry and wet season results for most of the parameters. Midstream values for the water quality index were 104.89 and 119.34 in the dry and wet seasons, respectively, which showed that the Midstream water samples were poor. The findings of this study showed that the abattoir activities were negatively impacting river water and soil quality.","PeriodicalId":7864,"journal":{"name":"African Journal of Aquatic Science","volume":"25 1","pages":"404 - 415"},"PeriodicalIF":1.4,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139324407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validation of the generic name Prescottiella gen. nov. (Desmidiales, Zygnematophyceae): a rare African desmid 属名Prescottiella gen.

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-10-02 DOI: 10.2989/16085914.2023.2258176

S. Janse van Vuuren, A. Levanets

引用次数: 0

A preliminary study into the detection of fish environmental DNA in selected South African estuaries 南非部分河口鱼类环境 DNA 检测初步研究

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-10-02 DOI: 10.2989/16085914.2023.2288341

Keneilwe Thekiso, Tshoanelo Miya, Dominique A Cowart

{"title":"A preliminary study into the detection of fish environmental DNA in selected South African estuaries","authors":"Keneilwe Thekiso, Tshoanelo Miya, Dominique A Cowart","doi":"10.2989/16085914.2023.2288341","DOIUrl":"https://doi.org/10.2989/16085914.2023.2288341","url":null,"abstract":"Environmental DNA (eDNA) is a powerful technique for the non-invasive and comprehensive monitoring of entire ecosystems. Despite its many advantages, the use of eDNA in South Africa as an assessment tool for fish biodiversity is largely underutilised. This study was performed as an initial screening to assess the efficiency of the eDNA method for characterising fish communities in South African waters using the metabarcoding approach. Water samples were collected from eight estuaries and vacuum filtered using 0.45 μm nylon membrane filters. DNA was extracted from the filters, and sample extracts underwent PCR assaying using MiFish primers for the 12S rRNA gene, prior to being sequenced on the Illumina MiSeq platform. The resulting sequence data produced 1 574 092 raw reads, which resulted in 119 operational taxonomic units (OTUs) after filtering and clustering. Taxonomic assignment of the OTUs produced four different taxonomic groups and one group representing unidentified sequences. The group with the highest number of OTUs (54%) was assigned to fish taxa consisting of 12 families and 22 genera identified across all estuaries, with only 16 taxa identified to species level. As this was a preliminary study, few samples were collected, and therefore several recommendations for a more comprehensive study design are provided. Overall, these results support the hypothesis that the eDNA metabarcoding approach can efficiently detect fish species in South African estuarine environments.","PeriodicalId":7864,"journal":{"name":"African Journal of Aquatic Science","volume":"26 1","pages":"393 - 403"},"PeriodicalIF":1.4,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139324079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Monogenean parasites of Pseudocrenilabrus philander (Weber, 1897) (Teleostei: Cichlidae) in the middle Limpopo River basin, southern Africa 非洲南部林波波河流域中部的菲鱼伪crenilabrus（Weber，1897）的单基因寄生虫（Teleostei：丽鱼科）

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-07-03 DOI: 10.2989/16085914.2023.2218433

I. Walter, I. Přikrylová, M. Barson, W. Luus-Powell

{"title":"Monogenean parasites of Pseudocrenilabrus philander (Weber, 1897) (Teleostei: Cichlidae) in the middle Limpopo River basin, southern Africa","authors":"I. Walter, I. Přikrylová, M. Barson, W. Luus-Powell","doi":"10.2989/16085914.2023.2218433","DOIUrl":"https://doi.org/10.2989/16085914.2023.2218433","url":null,"abstract":"The study aimed to isolate and describe the monogenean parasites of the southern mouthbrooder, Pseudocrenilabrus philander (Weber, 1897), an endemic fish species of the Limpopo River basin in southern Africa. During summer and winter between November 2013 and August 2014, 86 specimens of P. philander were collected from the Nwanedi River (South Africa) and Bubi River (Zimbabwe). Monogenean parasites were isolated from the skin, gills and stomach. Morphometric evaluations revealed the presence of six species from three genera: Enterogyrus coronatus Pariselle, Lambert & Euzet, 1991, Gyrodactylus thlapi Christison, Shinn & van As, 2005, Cichlidogyrus philander Douëllou, 1993, Cichlidogyrus tilapiae Paperna, 1960, and Cichlidogyrus sp. 1 and sp. 2. Morphological and metrical characterisations of the species found during the present study are presented in detail. The presence of C. philander from the Nwanedi River as well as E. coronatus and C. tilapiae from the Bubi River represent new geographical records. Pseudocrenilabrus philander is reported for the first time to host C. tilapiae.","PeriodicalId":7864,"journal":{"name":"African Journal of Aquatic Science","volume":"48 1","pages":"327 - 337"},"PeriodicalIF":1.4,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41346253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Limnological features and water-quality changes of two Ethiopian Rift Valley lakes, Lake Abaya and Lake Chamo 埃塞俄比亚大裂谷两个湖泊Abaya湖和Chamo湖的湖泊特征和水质变化

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-07-03 DOI: 10.2989/16085914.2023.2218411

A. Dagne, H. Tadesse, K. Teshome

{"title":"Limnological features and water-quality changes of two Ethiopian Rift Valley lakes, Lake Abaya and Lake Chamo","authors":"A. Dagne, H. Tadesse, K. Teshome","doi":"10.2989/16085914.2023.2218411","DOIUrl":"https://doi.org/10.2989/16085914.2023.2218411","url":null,"abstract":"We conducted a study in Lake Abaya and Lake Chamo, the two largest Ethiopian Rift Valley lakes, between 2016 and 2019, to evaluate their limnological features and infer longer-term changes in some water-quality parameters. Data generated through in situ measurements and laboratory analyses of physico-chemical parameters and the plankton communities were compared with results from the literature. Turbidity, salinity, nitrates and soluble reactive phosphorous showed an increasing trend in Lake Abaya, while in Lake Chamo conductivity, salinity, nitrates and soluble reactive phosphorous showed an increasing trend. In both lakes the water transparency and chlorophyll a concentration showed a declining trend. Despite higher available nutrients in Lake Abaya compared with Lake Chamo, higher turbidity with suspended solids contributed to lower chlorophyll-a concentrations and lower zooplankton abundance. The abundances of rotifers and crustaceans were lower in Lake Abaya compared with Lake Chamo. The mean trophic state index using total phosphorus, Secchi depth and chlorophyll-a shows that both lakes are in a eutrophic state. Our findings are consistent with previous studies and indicate that changes in major limnological features are a signal to take intervention measures to prevent further ecological degradation and to sustain the ecological services and livelihoods of fishers who are directly dependent on the lakes.","PeriodicalId":7864,"journal":{"name":"African Journal of Aquatic Science","volume":"48 1","pages":"237 - 246"},"PeriodicalIF":1.4,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69845799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Relationship between sediment grain sizes and macroinvertebrate distribution along the Isiukhu River, western Kenya 肯尼亚西部Isiukhu河沿岸沉积物粒度与大型无脊椎动物分布的关系

IF 1.4 4区环境科学与生态学

African Journal of Aquatic Science Pub Date : 2023-07-03 DOI: 10.2989/16085914.2023.2231486

Emmanuel Mzungu, A. Sifuna, W. Shivoga

{"title":"Relationship between sediment grain sizes and macroinvertebrate distribution along the Isiukhu River, western Kenya","authors":"Emmanuel Mzungu, A. Sifuna, W. Shivoga","doi":"10.2989/16085914.2023.2231486","DOIUrl":"https://doi.org/10.2989/16085914.2023.2231486","url":null,"abstract":"The current study investigated the relationship between sediment grain sizes and macroinvertebrate distribution along the Isiukhu River, a tropical stream in western Kenya. Ten sites in total were selected from the upstream, midstream and downstream areas. Sampling of sediments and macroinvertebrates was carried out twice a month from March 2018 to March 2019. Sediment was characterised as polymodal and extremely poorly sorted at the upstream; trimodal and extremely poorly sorted in the midstream; and polymodal and extremely poorly sorted towards the downstream of the river. Upstream sediments were fine gravelly mud and very coarse gravelly mud, while downstream sediments were very coarse gravelly muddy very fine sand and very fine gravelly, clayey very fine sand, indicating sediments became finer downstream. The study identified 993 individual macroinvertebrates from 21 families. Highest mean abundance (100 ± 9.2) was recorded at Kimangeti (upstream) while least was at Mutono (11 ± 0.7) (downstream). A regression model of the relationship between mean sediment grain size and mean macroinvertebrate abundance indicated that sediment grain size accounted for 28.7% of the spatial variability of macroinvertebrate abundance. The connection between sediment size and macroinvertebrate abundance and diversity in the Isiukhu River highlights that control of soil erosion in this catchment is important for the ecology of this river.","PeriodicalId":7864,"journal":{"name":"African Journal of Aquatic Science","volume":"48 1","pages":"274 - 286"},"PeriodicalIF":1.4,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42831854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0