scholarly journals Anopheles breeding in relation to aquatic vegetation and certain physico-chemical parameters in rice fields of Purnia district

2013 ◽  
Vol 14 (1&2) ◽  
pp. 121-125
Author(s):  
B. N. Pandey ◽  
Ranjana Kumari
Keyword(s):  
Aquatic Vegetation ◽  
Control Program ◽  
Larval Survival ◽  
Rice Fields ◽  
Chemical Parameters ◽  
Blue Green Algae ◽  
Physico Chemical ◽  
Vector Control Program ◽  
Mosquito Breeding ◽  
Chemical Factors

Anopheles breeding in relation to aquatic vegetation and certain physico-chemical parameters was studied in rice fields of Purnia district. Association of larvae with different types of aquatic vegetation in different proportions was observed. Maximum Anopheles larvae were found associated with green and blue green algae. It indicates that algae encountered mosquito breeding by providing food and shelter followed by Ipomea, Hydrilla and water hyacinth. Among physico-chemical parameters pH, temperature, turbidity, electrical conductivity, DO, nitrate, carbonate and phosphate showed positive correlation while chloride and bicarbonate showed negative correlation. It can be concluded that aquatic vegetation usually growing in rice fields influences Anopheles breeding and their abundance varies with the occurrence and intensity of each aquatic plant. Physico-chemical factors also exert impact on larval survival and emergence. Thus, such factors should be considered when designing an integrated vector control program. However, a detailed study on the role of other interrelated factors such as predator-parasitie relationship, cultivation practices, emergence rate etc is needed for full understanding of the subject. Although the specific soil type was not analyzed in this survey, other reports indicated that there is variation in development of Anopheles larva among the different soil types

scholarly journals Diurnal vertical migration of some cladocerans in relation to the physico-chemical factors in a fish pond

1970 ◽  
Vol 20 (2) ◽  
pp. 147-154 ◽  
Author(s):  
AS Bhuiyan ◽  
S Akhter ◽  
MMA Quddus
Keyword(s):  
Key Words ◽  
Vertical Migration ◽  
Fish Pond ◽  
Chemical Parameters ◽  
Surface Layers ◽  
Diurnal Vertical Migration ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Diurnal Movement ◽  
The Relationship

Diurnal vertical migration of four genera of cladocerans, namely Diaphanosoma sp., Daphnia sp., Moina sp. and Bosmina sp., during March to December, 2007 showed that the number of Diaphanosoma sp. was 501 units/1 in the surface layers, 172 units/l in the middle layers and 190 units/l in the bottom layers. The yearly number of Daphnia sp. in surface, middle and bottom layerss was 362 units/l, 46 units/l and 189 units/l respectively. In surface, bottom and middle layers, the number of Moina sp. was 159, 71 and 32 units/l, respectively. Bosmina sp. was 78 units/l in surface, 31 units/l in the middle and 33 units/l in the bottom layers. The number of Diaphanosoma sp., Daphnia sp., Moina sp., Bosmina sp., were 455, 149, 259 and 358 units/l, respectively in the morning, 63, 176, 142, 43 units/l at noon and 107, 55, 28, 59 units/l, respectively in the evening. Throughout the study period the cladocerans were always abundant near the surface during morning and evening. Among the factors responsible for the diurnal movement of cadoceran, light played the most important factor. The relationship between the physico-chemical factors and the cladoceran occurrence in the pond was also explored. Key words: Cladocera; Diurnal migration; Physico-chemical parameters; Fish pond DOI: http://dx.doi.org/10.3329/dujbs.v20i2.8975 DUJBS 2011; 20(2): 147-154

scholarly journals Distribution and Diversity of Macrophytes in Relation to Some Physico-Chemical Factors in the Ketar River, Ziway Catchment, Ethiopia

2021 ◽  
Author(s):  
Yadesa Chibsa ◽  
Seyoum Mengistou ◽  
Demeke Kifle
Keyword(s):  
Relative Frequency ◽  
Nutrient Loading ◽  
Anthropogenic Activities ◽  
Pistia Stratiotes ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Significant Difference ◽  
Chemical Factors ◽  
Floating Macrophytes ◽  
Favorable Conditions

Abstract Distribution and diversity of macrophytes in relation to some physico-chemical factors in the Ketar River were studied from December, 2017 to November, 2018. Physico-chemical parameters and macrophytes were collected from three stations along the river for eight months. Onsite measurements and laboratory work of physico-chemical was analyzed as recommended by APHA [31]. Macrophytes were collected manually using belt transect method. Except for pH and surface water temperatures, all the physico-chemical parameters measured showed no significant difference spatially. During the study period, sixteen macrophyte species belonged to fourteen families were identified. Among the identified macrophyte, 11 of them were emergent, while 3 were rooted with floating leaves and 2 free-floating. Free-floating macrophytes were shared the highest abundance followed by emergent. This research observed that the site (site 3) that was exposed to minimal human impact was rich in diversity and abundance of macrophytes. All the sites were dominated by emergent macrophytes that attained the highest relative frequency followed by rooted emergent species. Azolla nilotica and Pistia stratiotes were shared the highest abundance and were the dominant macrophyte with the relative frequency of 7.24% and density of 40.91%, and 7.93% and 26.54%, respectively. Under a favorable environment, nutrient loading from nearby creates more favorable conditions for the infestation of the invasive species (A. nilotica and P. stratiotes) to flourish and out-compete the other species of macrophyte. Therefore, anthropogenic activities that enhance nutrient addition to the River should be regulated.

The Physico-chemical Factors of Water in Relation to Mosquito Breeding in Trinidad

1932 ◽  
Vol 23 (4) ◽  
pp. 477-496 ◽  
Author(s):  
Mary V. F. Beattie
Keyword(s):  
Carbon Dioxide ◽  
Dissolved Oxygen ◽  
Nitrogen Content ◽  
Organic Nitrogen ◽  
Rice Field ◽  
Ammonia Nitrogen ◽  
Physico Chemical ◽  
Mosquito Breeding ◽  
Chemical Factors

1. An analysis of rice-field and canal waters was made over a period of 1 year.2. The incidence of Anopheles tarsimaculatus in these fields and canals was noted.3. The chemical factors estimated were pH, carbon dioxide, organic nitrogen, dissolved oxygen, nitrites, nitrates, phosphates and ammonia nitrogen.4. No correlation was found between the incidence of A. tarsimaculatus and the following factors: pH, carbon dioxide, organic nitrogen, dissolved oxygen, nitrites, nitrates and phosphates.5. In nature the female A. tarsimaculatus seemed to prefer waters with a low ammonia nitrogen content, larvae being rarely found in water with a content greater than 0·04 parts per 100,000. In the laboratory the larvae of A. tarsimaculatus lived several days in waters with an ammonia nitrogen content as high as 0·12 parts per 100,000. Therefore it was concluded that ammonia nitrogen had some bearing upon the prevalence of this Anopheles, affecting the oviposition of the female rather than the growth of the larvae.

scholarly journals Evaluation Trial on Production Performance of Freshwater Mud Eel (Monopterus cuchia) in Farmer’s Pond

2020 ◽  
pp. 9-15
Author(s):  
Parvez Chowdhury ◽  
A. F. M. Shofiquzzoha ◽  
Anuradha Bhadra
Keyword(s):  
Aquatic Vegetation ◽  
Fish Meal ◽  
Stocking Density ◽  
Production Performance ◽  
Total Production ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Net Profit ◽  
Evaluation Trial ◽  
Supplementary Feed

The experiment was conducted to evaluate the production performance of freshwater mud eel (Monopterus cuchia) with supplementary feed for a period of 5 months in field level. Two ponds were selected for this experiment in Maulovibazar district. Baby cuchia having weight of 50-70 g were stocked in ponds at a stocking density of 10/m2 in filter net. Liming (CaO) was done in all the ponds at rate of 250 kg/ha. A safety shelter for cuchia was developed by installing bamboo root, plastic and bamboo-made hollow pipe, aquatic vegetation and necessary objects in the pond. Different physico-chemical parameters were found to be within the acceptable ranges for M. cuchia culture in all ponds. Supplementary feed composed of fish paste (50%), fish meal (40%), rice bran (5%) and wheat flour (5%) was applied at the rate of 2-3% of body weight. After 5 months of rearing, total production obtained were 28.3±1.09 and 31.9±2.56 kg from pond-1 and pond-2, respectively. The highest production was obtained from pond-2 and lowest production was obtained in pond-1. The net profit gained from pond-1 and pond-2 were tk 2559 and 3211 per decimal, respectively.

Spatial and seasonal variations in physico-chemical parameters of the Imo River Estuary, Niger Delta, Nigeria

2020 ◽  
Vol 35 (1) ◽  
pp. 29-38
Author(s):  
L. E. Obuba ◽  
A.A. Nlewadim ◽  
A. Uka
Keyword(s):  
Water Quality ◽  
Coastal Wetlands ◽  
River Estuary ◽  
Oxygen Demand ◽  
Principal Component ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Analysis Of Results

Variations in the water quality of the Imo River estuary was investigated by measuring values of selected physico-chemical parameters. Samples were collected bi-monthly between April 2015 and March 2016, covering the dry and wet seasons of the year. Three stations were selected: upstream (Kalibiama), midstream (Opobo) and downstream (Queenstown). Analysis of results showed that physico-chemical parameters were affected more on seasonal than spatial scale. Principal component analysis carried out indicated that values of most of the parameters recorded within the stations clustered together. On the other hand, dispersed values were recorded in months and seasons with significant variations at (p≤0.05) among most parameters. The high spatial variations in phosphates, suspended solids and lead could be associated to human activities like laundry and waste disposal within Opobo and Kalibiama stations. While, high seasonal variability in most parameters could be associated with intense sunshine, cloud cover and tidal intrusion/dilution due to runoff. It can be concluded that nutrient fluxes due to nitrogenous fertilizers are not a problem within the estuary. However, chemical factors and biodegradable components which cause fluctuations in biological oxygen demand are more of the challenge. Keywords: Land-use, nutrient flux, water-quality, pollution, coastal wetlands.

scholarly journals Study on the occurrence and abundance of noxious Microcystis spp. in pangasiid catfish (Pangasianodon hypophthalmus) ponds

2020 ◽  
Vol 9 (1) ◽  
pp. 1-8
Author(s):  
Saleha Khan
Keyword(s):  
Feeding Rate ◽  
Algal Bloom ◽  
Silver Carp ◽  
Seasonal Abundance ◽  
Hypophthalmichthys Molitrix ◽  
Blue Green Algae ◽  
Pangasianodon Hypophthalmus ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Peak Abundance

As microalgal blooms are very common and making serious problems in water bodies throughout Bangladesh, an investigation was carried out to see the composition and succession of noxious blue-green algae in pangasiid catfish (Pangasianodon hypophthalmus) ponds. During the course of the study, 20 species of Cyanophyceae were recorded, and among them Microcystis aeruginosa was the most abundant compared to other species. Significant occurrence of Microcystis viridis was also observed. Efforts were made to study certain physico-chemical factors and their influence on the composition and seasonal abundance of these species. Peak abundance of M. aeruginosa was observed from July to August. Moderately higher water temperature, lower rainfall and NO3-PO4 enrichment increased the biomass of both M. aeruginosa (168.72×103cells/L) and M. viridis (8×103cells/L) in the experimental ponds. Higher feeding rate in monoculture of pangasiid catfish (P. hypophthalmus) made the ponds hyper nutrified by unutilized feed and fish excreta that supported the higher abundance of these Cyanophyceae. In composite culture ponds, silver carp (Hypophthalmichthys molitrix) effectively grazed down the microalgae and as a result, algal bloom was not noticed.

scholarly journals EVALUATION OF THE RIVERS VILNIA AND SIESARTIS ECOTOXICOLOGICAL STATE BASED ON MORPHOLOGICAL INDEXES OF JUVENILE ATLANTIC SALMON (SALMO SALAR L.) / SIESARTIES IR VILNIOS UPIŲ EKOTOKSIKOLOGINĖS BŪKLĖS ĮVERTINIMAS PAGAL ATLANTINĖS LAŠIŠOS (SALMO SALAR L.) JAUNIKLIŲ MORFOLOGINIUS RODIKLIUS

2015 ◽  
Vol 7 (4) ◽  
pp. 424-429 ◽  
Author(s):  
Gintarė Sauliutė ◽  
Gintaras Svecevičius
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Physiological State ◽  
Chemical Parameters ◽  
Specific Chemical ◽  
Atlantic Salmon Salmo Salar ◽  
Physico Chemical ◽  
Salmon Juvenile ◽  
Chemical Factors ◽  
Somatic Index

Objective of the study – to evaluate ecotoxicological state of two probably differently polluted salmon rivers: the Vilnia and Siesartis based on Atlantic salmon (Salmo salar L.) juvenile’s morphological indexes. Statistical analysis of estimated fish morphometric parameters and morphological indexes showed that the Vilnia and Siesartis Rivers’ salmon juveniles differ significantly. Condition factor (CF) and the gills-somatic index (GSI) were found to be the most sensitive biomarkers reflecting the physiological state of the fish. The Vilnia River salmon juvenile CF and GSI value was significantly different as compared with the Siesartis River’s salmon juvenile indexes, apparently, due to the increased water pollution. Since according to the classical physico-chemical parameters, both rivers’ water was very similar [no significant differences were found (p > 0.1)], it was suggested that here exist other non-specific chemical factors (pollutants) in water, which determine fish physiological and indicate river ecotoxicological states. Tyrimo tikslas – įvertinti dviejų galimai skirtingai užterštų lašišinių upių Vilnios ir Siesarties ekotoksikologinę būklę pagal atlantinės lašišos (Salmo salar L.) jauniklių morfologinius rodiklius. Statistiškai apdorojus ir apskaičiavus žuvų morfometrinius parametrus bei morfologinius rodiklius, nustatyta, kad tirtos Vilnios ir Siesarties žuvys gerokai skiriasi. Žuvų įmitimo koeficientas (IK) ir žiaunų somatinis indeksas (ŽSI) – jautriausi biožymenys, atspindintys žuvų fiziologinę būklę. Vilnios upėje lašišų jauniklių IK ir ŽSI vertės gerokai skyrėsi, lyginant su Siesarties upės lašišų jauniklių rodikliais, tikriausiai dėl didesnės vandens taršos pirmojoje upėje. Kadangi pagal klasikinius fizinius ir cheminius vandens parametrus upės buvo labai panašios [patikimų skirtumų nenustatyta (p > 0,1)], galima teigti, kad egzistuoja kiti, nespecifiniai cheminiai veiksniai (teršalai) vandenyje, kurie lemia žuvų fiziologinę bei indikuoja upių ekotoksikologinę būklę.

scholarly journals Relationship Among the Physico-Chemical Parameters of Soil and Water in Different Wetland Ecosystems

2020 ◽  
Vol 32 (7) ◽  
pp. 1681-1690
Author(s):  
Bibhu Prasad Panda ◽  
Manas Barik ◽  
Biswajita Mahapatra ◽  
Siba Prasad Parida ◽  
Aditya Kishore Dash ◽  
...  
Keyword(s):  
Research Work ◽  
Chemical Properties ◽  
Analytical Techniques ◽  
Wetland Ecosystem ◽  
Chemical Parameters ◽  
Wetland Ecosystems ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Soil And Water

The quality of life in water bodies depends on their physico-chemical properties and biodiversity. These physico-chemical properties are being disturbed by continuous addition of industrial, municipal and agricultural wastes which make them unfit for different organisms. This study describes the physico-chemical factors in soil and water of all sampled wetlands and the relationship among them in wetland ecosystem. All these analysis were done by using analytical techniques as described by standard methods for examination of water and wastewater. Physico-chemical parameters of water and soil also interlinked and correlated among each other. Sometimes these parameters work as a cycle to maintain the equilibrium in the ecosystem. Higher level of research work is needed to control the source of pollution to wetlands. By controlling the physico-chemical parameters of habitat, the diversity, density and richness of various wetland dependent species can be controlled in wetland ecosystem.

Avifaunal diversity and water quality analysis of an inland wetland

1970 ◽  
Vol 4 ◽  
pp. 1-32
Author(s):  
Deshkar Sonal ◽  
Rathod Jagruti ◽  
Padate Geeta
Keyword(s):  
Arid Zone ◽  
Abiotic Factors ◽  
Quality Analysis ◽  
Bird Diversity ◽  
Chemical Parameters ◽  
Resident Species ◽  
Water Quality Analysis ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Physical And Chemical

The key physical and chemical parameters of one of the major habitats for birds - the wetlands are known to influence congregation of migratory and resident species of birds. The present study deals with the interactions between these abiotic factors and bird diversity of one such pond in semiarid zone of Gujarat, India. The pond was visited twice in a month. During each visit waterfowl census was carried out and water samples were also collected to document changes in physico-chemical parameters over the seasons. The aggregation of birds in the area is mainly related to the increase in migratory population of birds during winter. The variations in bird aggregations as well as physico-chemical factors are discussed.  Key Words: Abiotic factors; Gujarat; physico-chemical parameters; semi-arid zone; waterfowl; wetlandDOI: 10.3126/jowe.v4i0.4151Journal of Wetlands Ecology, (2010) Vol. 4, pp 1-32

scholarly journals Monthly variation in physico-chemical properties of Kosi River in Almora district, Uttrakhand

2014 ◽  
Vol 15 (1&2) ◽  
pp. 201-205
Author(s):  
Pramod Kumar ◽  
Hem Chandra Upadhyay ◽  
Anupama Pandey
Keyword(s):  
Monsoon Season ◽  
Chemical Properties ◽  
Total Alkalinity ◽  
Strong Impact ◽  
Monthly Variation ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Free Carbon Dioxide ◽  
Chemical Factors ◽  
Total Dissolved Solid

The present investigation was carried out on the Kosi River, an important tributary of the river Ramgangafrom January 2012 to December 2012. Kosi is a spring fed river. The constituents monitored included water temperature, current velocity, pH, total dissolved solid, total solids, conductivity, dissolved oxygen, free carbon dioxide, total alkalinity and hardness. Throughout the study period, the water was found hard and a significant variation of the rest parameters were observed. The present study also revealed that the physico-chemical parameters showed a great seasonal variation and velocity of water andtotal solids were found to be highest in monsoon season that had a strong impact on other physico-chemical factors of the river.

Sign in / Sign up

Export Citation Format

Share Document