scholarly journals Assessment of the Ecological Health of Afrotropical Rivers Using Fish Assemblages: A Case Study of Selected Rivers in the Lake Victoria Basin, Kenya

2021 ◽  
Vol 2 ◽  
Author(s):  
Alfred O. Achieng ◽  
Frank O. Masese ◽  
Tracey J. Coffey ◽  
Phillip O. Raburu ◽  
Simon W. Agembe ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Fish Assemblages ◽  
Lake Victoria ◽  
Principal Component ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Lake Victoria Basin ◽  
Anthropogenic Pressures ◽  
Species Tolerance

Streams and rivers are globally threatened ecosystems because of increasing levels of exploitation, habitat degradation and other anthropogenic pressures. In the Lake Victoria Basin (LVB) in East Africa, these threats are mostly caused by unsustainable land use; however, the monitoring of ecological integrity of river systems has been hampered by a lack of locally developed indices. This study assessed the health of four rivers (Nzoia, Nyando, Sondu–Miriu and Mara) on the Kenyan side of the LVB using physicochemical water quality parameters and a fish-based index of biotic integrity (IBI). Fish tolerance ranking was derived from principal component analysis of water quality parameters, and the concept of niche breadth (NB). The relationship between fish species and water quality parameters was examined with canonical correspondence analysis, whereas community metrics and stressors were evaluated through Pearson network correlation analysis. Fish species richness, trophic structures, taxonomic composition and species tolerance were used to generate the metrics for fish-based IBI. NB showed that most of the fish species were moderately tolerant to poor water. Moderately tolerant and intolerant fish species were negatively correlated with a high level of organic loading in the Mara River. Fish-based IBI scores for the rivers ranged from 26 to 34, with Sondu–Miriu scoring the lowest. Our results show that the cumulative effect of stressors can adequately rank fish species tolerance according to the disturbance gradients and further develop regional metrics to assess river health. Despite the fact that fish communities are declining, continual management and enforcement of environmental regulations are important, with conservation and management of headwaters and low-order streams being essential while they are still species rich.

scholarly journals Assessing Fish Species Tolerance in the Huntai River Basin, China: Biological Traits versus Weighted Averaging Approaches

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1843 ◽  
Author(s):  
Xiao-Ning Wang ◽  
Hai-Yu Ding ◽  
Xu-Gang He ◽  
Yang Dai ◽  
Yuan Zhang ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Fish Assemblages ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Weighted Averaging ◽  
Biological Traits ◽  
Quantitative Studies ◽  
Tolerant Species ◽  
Species Tolerance

Fish species tolerance used as a component of fish-index of biological integrity (F-IBI) can be problematic as it is usually classified using the historical data, data from literature or expert judgments. In this study, fish assemblages, water quality parameters and physical habitat factors from 206 sampling sites in the Huntai River Basin were analyzed to develop tolerance indicator values (TIVs) of fish based on a (Fb-TIVs) and the weighted averaging (WA) method (FW-TIVs). The two quantitative methods for fish tolerance were then compared. The FW-TIVs and Fb-TIVs of fish species were calculated separately using a WA inference model based on ten water quality parameters (WT, pH, DO, SC, TDS, NH3, NO2−, NO3−, TP, Cl−, and SO42−), and six biological traits (lithophilic spawning, benthic invertivores, cold water species, equilibrium or periodic life history strategies, families of Cottidae, and species distribution range). Fish species were then classified into biological traits approach three categories (tolerant species, moderately tolerant species, and sensitive species). The results indicated that only 30.3% fish species have the same classification based on FW-TIVs and Fb-TIVs. However, the proportion of tolerant species based on two methods had a similar response to environmental stress, and these tolerant species were correlated with PCA axes 1 site scores obtained by (FW-TIVs, p < 0.05, R2 = 0.434; Fb-TIVs, p < 0.05, R2 = 0.334) and not correlated with PCA axis 2 site scores (FW-TIVs, p > 0.05, R2 = 0.001; Fb-TIVs, p > 0.05, R2 = 0.012) and PCA axis 3 site scores (FW-TIVs, p > 0.05, R2 = 0.000; Fb-TIVs, p > 0.05, R2 = 0.013). The results of linear regression analyses indicated that Fb-TIVs can be used for the study of fish tolerance. Fish tolerance assessments based on FW-TIVs requires long-term monitoring of fish assemblages and water quality parameters to provide sufficient data for quantitative studies. The Fb-TIV method relies on the accurate identification of fish traits by an ichthyologist. The two methods used in this study can provide methodological references for quantitative studies of fish tolerance in other regions, and are of great significance for the development of biological assessment tools.

Classification and Prediction of Goldfish Population and Water Quality Using a Potentiometric E-Tongue

2017 ◽  
Vol 60 (4) ◽  
pp. 1037-1044
Author(s):  
Zhenbo Wei ◽  
Yu Zhao ◽  
Jun Wang
Keyword(s):  
Neural Network ◽  
Water Quality ◽  
Pattern Recognition ◽  
Comprehensive Evaluation ◽  
Back Propagation ◽  
Correlation Coefficients ◽  
Principal Component ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Pattern Recognition Methods

Abstract. In this study, a potentiometric E-tongue was employed for comprehensive evaluation of water quality and goldfish population with the help of pattern recognition methods. Four water quality parameters, i.e., pH and concentrations of dissolved oxygen (DO), nitrite (NO2-N), and ammonium (NH3-N), were tested by conventional analysis methods. The differences in water quality parameters between samples were revealed by two-way analysis of variance (ANOVA). The cultivation days and goldfish population were classified well by principal component analysis (PCA) and canonical discriminant analysis (CDA), and the distribution of each sample was clearer in CDA score plots than in PCA score plots. The cultivation days, goldfish population, and water parameters were predicted by a T-S fuzzy neural network (TSFNN) and back-propagation artificial neural network (BPANN). BPANN performed better than TSFNN in the prediction, and all fitting correlation coefficients were &gt;0.90. The results indicated that the potentiometric E-tongue coupled with pattern recognition methods could be applied as a rapid method for the determination and evaluation of water quality and goldfish population. Keywords: Classify, E-tongue, Goldfish water, Prediction.

scholarly journals Study on suitability of Derawan Island as marine tourism destination towards development of sustainable tourism in the new capital city candidate of Indonesia

2021 ◽  
Vol 890 (1) ◽  
pp. 012072
Author(s):  
O R Simarangkir ◽  
P B Utami ◽  
Ricky ◽  
Nani ◽  
F Tawang ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Sustainable Tourism ◽  
Coral Community ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Capital City ◽  
Index Formula ◽  
Marine Tourism ◽  
Suitability Index

Abstract Derawan Island is one of the leading tourist destinations in Kalimantan Timur Province which is a candidate for the new capital city of Indonesia. Marine tourism on Derawan Island relies on the potential of marine resources so that a suitability study is needed for the development of sustainable tourism. This study aims to determine the suitability of marine tourism, especially the interest in diving and snorkeling in sites of Derawan Island. Data collection was carried out by surveying in December 2020 at five snorkeling and six popular dive sites in Derawan Island. Data on coral community, the number of coral fish species, and the water quality parameters are used to analyze the suitability of marine tourism. Line Intercept Transect (LIT) method was used to collecting coral community data, Underwater Visual Census (UVC) method was used to collect data on the abundance of reef fish species, and in situ water quality parameters. Tourism suitability index formula (IKW) using the four classification marine tourism suitability matrix was used to analyze the data. The results of the analysis show the suitability index for diving tourism as a whole is in suitable to very suitable category, while the snorkeling tourism suitability index is in the suitable category.

Genotoxic effects on fish species and water quality parameters of two tributaries of the Sinos River, Southern Brazil

2018 ◽  
Vol 21 (3/4) ◽  
pp. 161 ◽  
Author(s):  
Thaís Dalzochio ◽  
Leonardo Airton Ressel Simões ◽  
Mateus Santos De Souza ◽  
Gabriela Zimmermann Prado Rodrigues ◽  
Lucas José Schvambach ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Southern Brazil ◽  
Genotoxic Effects

scholarly journals Intensification of “mola” (Amblypharyngodon mola) culture in homestead ponds

2020 ◽  
Vol 9 (2) ◽  
pp. 23-29
Author(s):  
SN Mona ◽  
S Sultana ◽  
KK Ahmed ◽  
N Khan ◽  
KA Huq ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Stocking Density ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Culture Period ◽  
Total Biomass ◽  
Supplementary Feed ◽  
By Products ◽  
Indigenous Fish Species

The research was carried out with small indigenous fish species (SIS) named mola (Amblypharyngadan mola) in monoculture system to intensify production in farmers’ homestead ponds with 50% household women involvement during June to December, 2016. Brood mola was stocked at the rate of 2, 4 and 6 m-2 with three replications in each treatment. Supplementary feed (27.1% protein) consisted of commonly available agricultural by-products was provided daily at the rate of 2% of the total biomass along with natural feed as mola is planktivorous species. Seven different water quality parameters were measured fortnightly and found within cultivable range. Gross production of mola were obtained 520.59±23.4, 599.06±258.87, 1063.94±42.87 kg ha-1 from T1, T2 and T3, respectively after 4 months’ culture period. The yield of T3 was significantly greater (P < 0.05) than T1 and T2. The highest gross production was obtained in T3 where stocking density was 6 brood mola m-2. Int. J. Agril. Res. Innov. Tech. 9(2): 23-29, December 2019

Assessment of Water Quality Parameters on Uzuncayır Dam Lake Using Principal Component and Cluster Analysis

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Banu KUTLU ◽  
Azime KÜÇÜKGÜL ◽  
Osman SERDAR ◽  
Rahmi AYDIN ◽  
Durali DANABAŞ
Keyword(s):  
Water Quality ◽  
Cluster Analysis ◽  
Principal Component ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
And Cluster Analysis

scholarly journals Statistical Assessment of Water Quality Parameters for Pollution Source Identification in Sukhnag Stream: An Inflow Stream of Lake Wular (Ramsar Site), Kashmir Himalaya

2014 ◽  
Vol 2014 ◽  
pp. 1-18 ◽  
Author(s):  
Salim Aijaz Bhat ◽  
Gowhar Meraj ◽  
Sayar Yaseen ◽  
Ashok K. Pandit
Keyword(s):  
Water Quality ◽  
Cluster Analysis ◽  
Principal Component ◽  
Pollution Source ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Accumulation Factor ◽  
Kashmir Himalaya ◽  
And Cluster Analysis ◽  
Maximum Similarity

The precursors of deterioration of immaculate Kashmir Himalaya water bodies are apparent. This study statistically analyzes the deteriorating water quality of the Sukhnag stream, one of the major inflow stream of Lake Wular. Statistical techniques, such as principal component analysis (PCA), regression analysis, and cluster analysis, were applied to 26 water quality parameters. PCA identified a reduced number of mean 2 varifactors, indicating that 96% of temporal and spatial changes affect the water quality in this stream. First factor from factor analysis explained 66% of the total variance between velocity, total-P, NO3–N, Ca2+, Na+, TS, TSS, and TDS. Bray-Curtis cluster analysis showed a similarity of 96% between sites IV and V and 94% between sites II and III. The dendrogram of seasonal similarity showed a maximum similarity of 97% between spring and autumn and 82% between winter and summer clusters. For nitrate, nitrite, and chloride, the trend in accumulation factor (AF) showed that the downstream concentrations were about 2.0, 2.0, and 2.9, times respectively, greater than upstream concentrations.

scholarly journals Water quality index as a tool for wetland restoration

Water Policy ◽  
2017 ◽  
Vol 19 (3) ◽  
pp. 390-403 ◽  
Author(s):  
Nitin Bassi ◽  
M. Dinesh Kumar
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Urban Areas ◽  
Quality Index ◽  
Action Plan ◽  
Water Quality Monitoring ◽  
Quality Parameters ◽  
Water Bodies ◽  
Water Quality Parameters ◽  
Anthropogenic Pressures

Worldwide, wetlands are subjected to increasing anthropogenic pressures resulting in loss of their hydrological and ecological functions. Such impacts are more pronounced in the case of wetlands in urban areas which are exposed to land use changes and increased economic activities. In many Indian cities, natural water bodies such as lakes are heavily polluted due to runoff from farmlands in urban and peri-urban areas and discharge of untreated domestic and industrial wastewater. The major constraint for restoring such water bodies is difficulty in devising a concrete action plan for analysing different sets of water quality parameters. Hence, a water quality index (WQI), which is a tool to analyse large amounts of data on different water quality parameters, is computed for one of the biggest natural lakes in the metropolitan city of Delhi. The mean WQI of the lake was estimated to be 46.27, which indicates a high level of water pollution. The paper discusses how these findings can be used for informing policies on management of wetlands. The paper also suggests establishment of a community based water quality monitoring and surveillance system, backed by infrastructural support from the State, in order to restore the wetlands in urban areas.

scholarly journals Ichthyofauna of Endemic Fish in Towuti Lake, Luwu Timur Regency, South Sulawesi, Indonesia

2021 ◽  
pp. 20-30
Author(s):  
. Jayadi ◽  
Muhammad Natsir Nessa ◽  
Andi Tamsil ◽  
. Harlina ◽  
. Ernaningsih ◽  
...  
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Quality Parameters ◽  
Descriptive Statistics ◽  
Water Quality Parameters ◽  
South Sulawesi ◽  
Fish Samples ◽  
Survival And Growth ◽  
Endemic Fish ◽  
Lake Towuti

Aims: The aims of this study to determine the biodiversity of endemic fish in Lake Towuti, Luwu Timur Regency South Sulawesi, Indonesia. Study Design: The research was conducted by survey Place and Duration of Study: The research was carried out in February until March 2021 in Tanjung Timbala; Tanjung Lengkobutanga; Tanjung Bakara; Tanjung Saone and. Tanjung Tominanga at Lake Towuti, Luwu Timur Regency South Sulawesi, Indonesia. Methodology: Fish samples were carried out every week using a trap net for 8 weeks. Fish samples obtained from each station were separated according to species. Fish samples were preserved with 4% formalin and then immersed in 70% alcohol before species identification was conducted. Data analysis in this research used descriptive statistics. Results: The endemic fish species was found is telamtherina bonti Telmatherina bonti, Telmatherina celebensis, Paratherina striata, Tominanga sanguicauda, Tominanga aurea Oryzias profundicola, Oryzias matanensis, Oryzias marmoratus, Mugilogobius hitam, Glossogobius flavipinnis, Glossogobius matanensis and Dermogenys megarhamphus. The percentage of endemic fish caught at each station on Lake Towuti was different. The water quality parameters obtained are as follows Temperature: 26.40⁰C-30.30⁰C, pH: 6.35-9.03, dissolved oxygen (DO):6.25-8.95 mg/L and NO3-N: 0.023-0.066 mg/L.This water quality were suitable for the survival and growth of endemic fish. Conclusion: Endemic fish families were obtained such as Telmatheridae, Adrianichthyidae, Gobiidae and Hemiramphidae and a total of twelve endemic fish species were found in this study. The number of endemic fish was found to be different at the station. Water quality parameters play an important role in the distribution and existence of endemic fish in Lake Towuti.

scholarly journals EVALUATING SURFACE WATER QUALITY AND WATER MONITORING PARAMETERS IN THE TIEN RIVER, VIETNAMESE MEKONG DELTA

2021 ◽  
Vol 83 (3) ◽  
pp. 29-36
Author(s):  
Thanh Giao Nguyen ◽  
Vo Quang Minh
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Monitoring Program ◽  
Oxygen Demand ◽  
Surface Water Quality ◽  
Principal Component ◽  
Water Quality Monitoring ◽  
Quality Parameters ◽  
Water Monitoring ◽  
Water Quality Parameters

The study aimed to evaluate the surface water quality of the Tien River and identify water quality parameters to be monitored using the water quality monitoring data in the period of 2011 - 2019. The water samples were collected at five locations from Tan Chau to Cho Moi districts, An Giang province for three times per year (i.e., in March, June, and September). Water quality parameters included temperature (oC), pH, dissolved oxygen (DO), total suspended solids (TSS), nitrate (NO3--N), orthophosphate (PO43--P), biological oxygen demand (BOD), and coliforms. These parameter results were compared with the national technical regulation on surface water quality QCVN 08-MT: 2015/BTNMT, column A1. Principal component analysis (PCA) was used to identify the sources of pollution and the main factors affecting water quality. The results of this study showed that DO concentration was lower and TSS, BOD, PO43--P, coliforms concentrations in the Tien river exceeded QCVN 08-MT: 2015/BTNMT, column A1. pH, temperature, and NO3--N values were in accordance with the permitted regulation. The water monitoring parameters were seasonally fluctuated. DO, BOD, TSS, and coliforms concentrations were higher in the rainy season whereas NO3--N and PO43--P were higher in the dry season. The PCA results illustrated that pH, TSS, DO, BOD, PO43--P and coliforms should be included in the monitoring program. Other indicators such as temperature and NO3--N could be considered excluded from the program to save costs. 

Sign in / Sign up

Export Citation Format

Share Document