Sympatry in four species of Rhinichthys (Pisces), including the first documented occurrences of R. umatilla in the Canadian drainages of the Columbia River

1988 ◽  
Vol 66 (8) ◽  
pp. 1846-1856 ◽  
Author(s):  
Alex E. Peden ◽  
Grant W. Hughes
Keyword(s):  
Water Quality ◽  
Future Development ◽  
Columbia River ◽  
Large Rivers ◽  
Separate Study ◽  
Species Status ◽  
River Systems ◽  
Historical Changes ◽  
The Status ◽  
Hydroelectric Projects

Four species of Rhinichthys (R. cataractae, R. falcatus, R. osculus, and R. umatilla) are recognized in Canadian sections of the Columbia River, with sympatry occuring between all species except R. falcatus and R. osculus. Species status of the latter is supported by morphological dissimilarity between it and the morphologically similar R. falcatus and R. umatilla. Populations of R. umatilla from the Similkameen, Kettle, and Columbia (including Kootenay and Slocan) rivers have morphological and pigmentary differences, but are identifiable with R. umatilla of the lower Columbia River. Canadian R. osculus are similar to historically known populations near the Colville and Little Spokane rivers of northeastern Washington. Populations from more distant tributaries of the Columbia system are variable in morphology and habitat and require separate study to determine their relationships to Canadian populations. Rhinichthys osculus was apparently replaced by R. umatilla in the Colville River, an event that may have been correlated with historical changes of water quality or flooding by the Roosevelt Reservoir. Because R. umatilla prefers swift clear portions of large rivers, it is potentially in conflict with hydroelectric projects. Though not immediately threatened, the status of this species in Canada should be monitored in connection with future development of river systems.

Water quality status of rivers in the coastal city of Manado, North Sulawesi Province, Indonesia

2014 ◽  
pp. 8
Author(s):  
Markus T Lasut ◽  
Adianse Tarigan
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Government Regulation ◽  
Organic N ◽  
Coastal City ◽  
North Sulawesi ◽  
The Status ◽  
Water Quality Status ◽  
The Government ◽  
Quality Status

A study on water quality status of three riverine systems, S. Bailang (SB), S. Maasing (SM), and S. Tondano (ST), in coastal city of Manado, North Sulawesi Province, has been conducted to measure several water quality parameters, to analyse source and quality of wastewater discharge, and to assess the status of the rivers related to the water quality. Measurement of the parameters was conducted using three indicators, i.e. organic (BOD5) and in-organic (N-NO3 and P-PO4), and pathogenic microorganism (Escherichia coli [EC] and total coliform [TC]). The result showed that the level of water quality varied between the rivers. The average level of water quality (based on the observed parameters) in SB, respectively, was 0.317 mg/l, 0.093 mg/l, 2 mg/l, >2420 MPN, and  >2420 MPN; in SM, respectively, was 0.029 mg/l, 1.859 mg/l, 17.7 mg/l, >2420 MPN, and >2420 MPN; and in ST, respectively, was 0.299 mg/l, 0.252 mg/l, 3.5 mg/l, >2420 MPN, and >2420 MPN. The level of water quality between the rivers was not significantly different (p>0.05), except based on the parameter of N-NO3 which was significantly different (p<0.01). The status of the observed rivers varied based on the classes of their water utilities (according to the Government Regulation of Indonesia, No. 82, 2001); mostly was "unsuitable". Kajian tentang status kualitas air di 3 perairan sungai di kota pesisir Manado, S. Bailang (SB), S. Maasing (SM), dan S. Tondano (ST), Provinsi Sulawesi Utara, telah dilakukan yang bertujuan untuk mengukur beberapa parameter kualitas air, menganalisis sumber dan kualitas buangan limbah domestik, dan menilai status ketiga perairan sungai tersebut. Tiga indikator digunakan, yaitu: bahan organik (BOD5), bahan anorganik (N-NO3 dan P-PO4), dan mikroorganisme patogenik (Escherichia coli [EC] dan coliform total [TC]). Hasil kajian menunjukkan bahwa tingkat kualitas air perairan tersebut berbeda-beda. Konsentrasi rerata parameter kualitas air  (BOD5, N-NO3, P-PO4, EC, dan TC) di SB, berturut-turut, sebesar 0.317 mg/l, 0.093 mg/l, 2 mg/l, >2420 MPN, dan >2420 MPN; di SM, berturut-turut, sebesar 0.029 mg/l, 1.859 mg/l, 17.7 mg/l, >2420 MPN, dan >2420 MPN; dan di ST, berturut-turut, sebesar 0.299 mg/l, 0.252 mg/l, 3.5 mg/l, >2420 MPN, dan >2420 MPN. Konsentrasi kualitas air ketiga sungai tersebut tidak berbeda secara signifikan (p>0.05), kecuali parameter N-NO3 (p<0.01). Secara umum, kondisi kualitas air ketiga sungai tersebut, menurut Peraturan Pemerintah No. 82, 2001) berada dalam status “tidak cocok” untuk peruntukannya.

Historical Changes in Water Quality at German Branch in the Choptank River Basin

2008 ◽  
Vol 199 (1-4) ◽  
pp. 353-369 ◽  
Author(s):  
Adrienne J. Sutton ◽  
Thomas R. Fisher ◽  
Anne B. Gustafson
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Historical Changes ◽  
Choptank River

scholarly journals Hydrochemical assessment of water quality for irrigation: A case study of the wetland complex of Guerbes-Sanhadja, North-East of Algeria

2018 ◽  
Vol 38 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Sihem Hedjal ◽  
Derradji Zouini ◽  
Abdelwaheb Benamara
Keyword(s):  
Water Quality ◽  
Quality Parameters ◽  
Irrigated Agriculture ◽  
Sodium Absorption ◽  
Sodium Absorption Ratio ◽  
North East ◽  
The Status ◽  
Wetland Complex ◽  
Eastern Algeria ◽  
Irrigation Quality

AbstractThe wetland complex of Guerbes-Sanhadja (north-eastern Algeria), has experienced in recent years a certain economic expansion, particularly agricultural, about 47% of the useful agricultural area marked by several varieties of crops ranging from market gardening to speculative crops, requiring large quantities of water for irrigation purposes, however the swampy areas are the main sources used for irrigation purposes in this practice. It is therefore necessary for this water to have physicochemical properties adapted to plants, in particular the absence of salinity. This study was done to evaluate the status of the swamps areas quality and its suitability for irrigated agriculture. To achieve this objective, water samples from ten swamps areas water were collected from Guerbes-Sanhadja in February and June of 2016. The water quality of these swamps was estimated from different water quality parameters such as pH and electrical conductivity (EC), the chemical parameters like Na+, K+, Ca2+, HCO3−, SO42−, Cl−, BOD5, NO3−, NO2−, NH4+ and PO43−. Based on the physico-chemical analyses, irrigation quality parameters like sodium absorption ratio (SAR), percent sodium (% Na), residual sodium carbonate (RSC), permeability index (PI), magnesium hazard (MH) were calculated. The results showed that the overall concentration of nitrate was very high. About 60 percent of the swampy areas had suitable water quality for chloride, and they had a concentration below the permissible limit for crop irrigation. From the Richards diagram, it is observed that most of the samples from the study area fall in the good to permissible classes for irrigation purpose.

scholarly journals Biological Water Quality Indices Performance Based on Aquatic Insects in Recreational Rivers

2021 ◽  
Vol 32 (1) ◽  
pp. 89-103
Author(s):  
Ahmad Hadri Jumaat ◽  
◽  
Suhaila Abdul Hamid ◽  
Keyword(s):  
Water Quality ◽  
Aquatic Insects ◽  
Aquatic Insect ◽  
Working Party ◽  
Biotic Index ◽  
Biological Index ◽  
Biological Water ◽  
The Status ◽  
Suitable Index ◽  
Abundance And Distribution

Abundance and distribution of aquatic insects respecting to several water chemical parameters from six rivers were studied in order to determine the performance of biological index in monitoring the water quality. A total of 960 individuals of aquatic insects from nine orders were recorded using kick and drag sampling techniques. Lubok Semilang had the greatest number of aquatic insects with 250 individuals, followed by Telaga Tujuh (181 individuals) and Sungai Durian Perangin (171 individuals). EPT (Ephemeroptera, Plecoptera and Trichoptera) order were the most dominant order recorded in all six rivers. Lata Kekabu had more diverse and richer aquatic insect assemblages based on ecological indices compared to the other five rivers. In order to evaluate the water quality of recreational rivers in Malaysia, Family Biotic Index (FBI), Malaysian Family Biotic Index (MFBI) and Biological Monitoring Working Party (BMWP) were used and compared with Water Quality Index to determine the water quality at the study areas. Results demonstrated that the biotic indices were more sensitive towards changes in water parameters than the WQI. Among all the biological indices, MFBI was the most suitable index to be adopted in Malaysian river water assessment as it is more reliable in assessing the status of water quality.

Studies in Australian amphibia II..Taxonomy, ecology and evolution of the genus Heleioporus Gray (Anura : Leptodactylidae)

1967 ◽  
Vol 15 (2) ◽  
pp. 367 ◽  
Author(s):  
AK Lee
Keyword(s):  
Species Status ◽  
Breeding Sites ◽  
Ephemeral Ponds ◽  
Mating Call ◽  
The Status ◽  
Water Courses ◽  
Species Groups ◽  
Western Australian ◽  
Winter Rain

The status of the five existing species of the genus Heleioporus Gray, H. albopunctatus Gray, H. australiacus (Shaw), H. eyrei (Gray), H. inornatus Lee & Main, and H. psammophilus Lee & Main are confirmed on the basis of morphological and behavioural criteria and the results of interpopulation in vitro crosses. The Western Australian population, formerly included under H. australiacus, is raised to species status on the basis of consistent differences in morphology and mating call. Each species is redescribed, and descriptions of the larvae and juveniles are included. The results of in vitro crosses support the recognition of two species groups, a bassian group comprising H. australiacus, the H. australiacus-like frog, and H. inornatus, and an eyrean group comprising H. albopunctatus, H. eyrei, and H. psammophilus. The breeding biology of all of the western species appears closely tied to the Mediterranean climate of south-western Australia. All species breed in April and May. Rain sufficient to moisten the soil, and declining temperatures are the two most obvious environmental factors influencing the timing of breeding. Breeding sites include ephemeral ponds and water courses, and the edges of coastal lakes. Breeding occurs before these are covered by water, in winter. Males call from burrows, and copulation, oviposition, and embryonic development all occur at the bottom of these burrows. Where they occur together, the burrows of H. albopunctatus, H. eyrei, and H. psammophilus are found scattered through the centre of a swamp and those of H. inornatus, around the periphery. The eggs are laid in froth, and development to hatching takes between 1 and 3 weeks. Hatching may be delayed by withholding the eggs from water. The period between the onset of calling and hatching of the embryos roughly corresponds to the period between the onset of winter rain and the flooding of larval sites. The larvae of H. albopunctatus, H. eyrei, and H, psammophilus are found in ponds, those of H. inornatus in collapsed, flooded breeding burrows, and those of H. australiacus and the H. australiacus-like frog in creeks.

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