Dinâmica espacial dos parâmetros físicos e químicos da água em viveiros de piscicultura

O Brasil apresenta características que podem fazer do seu território o grande celeiro mundial para produção de organismos piscícolas cultivados. No entanto, para isso, é fundamental estudar os parâmetros físico e químico da água das áreas de cultivo, para que se possam buscar estratégias para evitar erros de manejos. Com isso, objetivou-se avaliar a dinâmica espacial dos parâmetros físicos e químicos da água de viveiros de piscicultura e sua relação de dependência. O estudo foi realizado em um viveiro escavado em terreno natural, localizado em uma propriedade, adjacente à fazenda experimental da escola de Medicina Veterinária e Zootecnia, da Universidade Federal do Tocantins, no município de Araguaína. Os pontos para coleta no grid foram obtidos através de GPS, considerando as dimensões da área total. Em cada ponto georreferenciado, foram realizadas coletas em duas profundidades diferentes, uma a 20 cm da superfície da água (profundidade 1), e outra a 20 cm do fundo do tanque (profundidade 2), totalizando 108 amostras. Ocorreu grande variabilidade entre as profundidades para maioria das variáveis. Na estatística descritiva foi observado coeficiente de variação de grau moderado apenas para oxigênio dissolvido. Na análise dos semivariogramas, apenas a variável condutividade elétrica demonstrou efeito pepita puro. Foi verificada dependência espacial entre as variáveis estudadas nas duas profundidades. Através da geoestatística, foi possível evidenciar alteração na distribuição espacial dos parâmetros físicos e químicos: oxigênio dissolvido, temperatura da água e pH, mas não foi útil para condutividade elétrica, dada sua baixa variabilidade espacial. Os parâmetros físicos e químicos da água dos tanques de piscicultura são influenciados pelas práticas de manejo, sendo facilmente detectado através dos mapas de isolinhas.Spatial dynamics of the physical and chemical parameters of water in fish farmsAbstract: Brazil presents, characteristics that can make of its territory, the world's great barn for the production of cultivated fish organisms. However, for this it is fundamental to study the physical and chemical parameters of the water in the growing areas, so that strategies can be sought to avoid handling errors. The aim of this study was to evaluate the spatial dynamics of the physical and chemical parameters of fish pond water and their relationship of dependence. The study was carried out in a nursery excavated on natural land, located on a property, adjacent to the experimental farm of the Veterinary Medicine and Animal Science School, Federal University of Tocantins, in the municipality of Araguaína. The points for collection on the grid were obtained by GPS, considering the size of the total area. In each georeferenced point samplings were performed in two different depths, one 20 cm from the tank bottom (depth first) and the other at 20 cm from the water surface (depth 2) totaling 108 samples. There was major variation between depths for most variables. Descriptive statistics was observed moderate variation coefficient only for dissolved oxygen. In the analysis of semivariograms, only the variable electrical conductivity showed pure nugget effect. spatial dependence was found between the variables at both depths. The mesh used was effective in showing the spatial distribution of physical - chemical parameters: dissolved oxygen, water temperature and pH, but it was not useful for electrical conductivity, given its low spatial variability. The physical and chemical parameters of the water of the fish ponds are influenced by the management practices, being easily detected through the isoline maps.

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Counseling on Good Water Quality for the Cultivation of Batak Fish in Toba Lake Waters

Mattawang: Jurnal Pengabdian Masyarakat ◽

10.35877/454ri.mattawang310 ◽

2021 ◽

Vol 2 (1) ◽

pp. 23-26

Author(s):

Herna Febrianty Sianipar ◽

Theresia Monika Siahaan ◽

Apriani Sijabat

Keyword(s):

Carbon Dioxide ◽

Water Quality ◽

Dissolved Oxygen ◽

Fish Farming ◽

Chemical Parameters ◽

Measuring Devices ◽

Physical And Chemical Parameters ◽

Lake Waters ◽

Physical And Chemical ◽

Very High

This service aims to provide information about the value of good water quality and demonstrate directly the tools used to measure it which aim to cultivate Batak fish based on biological, physical and chemical parameters such as temperature, dissolved oxygen, carbon dioxide, pH, and provide information on the names of measuring devices. . This service has been carried out in Gorat Village, Toba Samosir Regency with the method of counseling and material discussion (exposure and question and answer), as well as the practice of measuring water quality externally and analyzing the results of its value. The results of the counseling show that many fish farmers do not understand the value of good water quality for batak fish cultivation and not many know the equipment that can be used to check water quality. From this counseling, it can be seen that the interest of fish farmers and the community is very high, and they become more aware of the value of good water quality for fish farming and know the equipment. Abstrak Pengabdian ini bertujuan untuk memberikan penyuluhan tentang nilai kualitas air yang baik dan mendemonstrasikan langsung alat yang digunakan mengukurnya yang bertujuan untuk membudidayakan ikan batak berdasarkan parameter biologi, fisika dan kimia seperti suhu, oksigen terlarut, karbondioksida, pH, serta memberikan informasi nama alat-alat pengukurnya. Pengabdian ini telah dilakukan di Desa Gorat, Kabupaten Toba Samosir dengan metode penyuluhan dan diskusi materi (paparan dan tanya jawab), serta praktek pengukuran kualitas air secara eksitu dan menganalisis hasil nilainya. Hasil penyuluhan menunjukan bahwa banyaknya petani ikan yang belum paham tentang nilai kualitas air yang baik untuk budidaya ikan batak serta belum banyak yang mengetahui peralatan yang dapat digunakan untuk memeriksa kualitas air. Dari penyuluhan ini terlihat animo petani ikan dan masyarakat sangat tinggi, dan mereka menjadi lebih paham tentang nilai kualitas air yang baik untuk budidaya ikan serta mengetahui peralatannya.

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ANALISIS KESESUAIAN PERAIRAN UNTUK BUDIDAYA IKAN KERAPU BEBEK (Cromileptes altivelis) DI PERAIRAN PULAU TEGAL TELUK LAMPUNG

e-Jurnal Rekayasa dan Teknologi Budidaya Perairan ◽

10.23960/jrtbp.v6i2.p719-728 ◽

2018 ◽

Vol 6 (2) ◽

pp. 719 ◽

Cited By ~ 2

Author(s):

Desti Rizki Anggraini ◽

Abdullah Aman Damai ◽

Qadar Hasani

Keyword(s):

Water Quality ◽

Dissolved Oxygen ◽

Water Depth ◽

Current Velocity ◽

Sampling Location ◽

Selling Price ◽

Chemical Parameters ◽

Foreign Markets ◽

Physical And Chemical Parameters ◽

Physical And Chemical

Tegal Island is part of Lampung Bay which has potential to be the location of aquaculture. One of kind fish that can be cultivated in these area is the humpback grouper (Cromileptes altivelis). Humpback grouper is the most popular fish species in local and foreign markets that have the highest selling price. The purpose of this study were to know the physical and chemical parameters in Tegal Island waters, to know the suitability of the waters for the humpback grouper cultivation in the waters of Tegal Island. The research was conducted in May 2017. The sampling location was 4 stations. The range of water quality values in Tegal island were water depth (15-25 m), dissolved oxygen (7 – 8 mg/l), brightness (5-10 m), salinity (30-34 ppt), temperature (28 – 32°C ), current velocity (20 – 50 m/s), pH (7,7 – 8,0), nitrate (0,9 – 3,2 mg/l) and phosphate (0,2 – 0,5 mg/l). The results showed that the waters of Tegal Island had appropriate water suitability level (St 3), corresponding marginally (St 1 and St 2) and unsuited (St 4) for the cultivation of humpback grouper.

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Influence of biological removal of lactose on the physical and chemical parameters of crude sweet whey

Acta Scientifica Naturalis ◽

10.2478/asn-2019-0023 ◽

2019 ◽

Vol 6 (2) ◽

pp. 123-129

Author(s):

Kamel Acem ◽

Tassadit Saadi ◽

Nouria Benali

Keyword(s):

Electrical Conductivity ◽

Dry Matter ◽

Freshwater Ecosystems ◽

Operating Conditions ◽

Chemical Parameters ◽

Biological Removal ◽

Physical And Chemical Parameters ◽

Sweet Whey ◽

Physical And Chemical

Abstract The crude sweet whey is an effluent and a co-product of cooked and pressed cheeses and casein, released into the environment without prior treatment (case of Cheese Dairy Sidi Saada, Yellel, Relizane, Algeria) affect the quality of freshwater ecosystems (Oued Mina, Relizane, Algeria).Our study focused on the control of the physical and chemical parameters of crude sweet whey and delactosed whey.The results showed that the applied bioprocess modified the physical and chemical parameters of crude sweet whey such as :density,dry matter,refractive index,viscosity,ash,pH and electrical conductivity, acidity,proteins and lactose; for this purpose these findings depended on the operating conditions, and the composition of the whey put in treatment.

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PARAMETER FISIKA DAN KIMIA AIR KOLAM IKAN NILA HITAM (Oreochromis niloticus)

Jurnal Sains Natural ◽

10.31938/jsn.v8i1.107 ◽

2018 ◽

Vol 8 (1) ◽

pp. 24 ◽

Cited By ~ 1

Author(s):

Meilinda Pramleonita ◽

Nia Yuliani ◽

Ridha Arizal ◽

Supriyono Eko Wardoyo

Keyword(s):

Water Quality ◽

Oreochromis Niloticus ◽

Pond Water ◽

Fish Pond ◽

Secchi Disk ◽

Chemical Parameters ◽

Physical And Chemical Parameters ◽

The Difference ◽

Physical And Chemical

Physical and Chemical Parameters of Water Fish Pond Black Nile Tilapia (Oreochromis niloticus) Water is a natural resource that is essential for the survival of humans and other creatures, role of water is essential for life on earth, especially fish in the water habitat. Fish need a comfortable environment in order to be healthy and growing optimally. Therefore, the water, used as a habitat of life for the fish, have certain requirements. So the quality of the water must be very noted. Tilapia is a freshwater fish that has a great tolerance towards the environment, therefore it is highly appreciated by fish farmers in Indonesia. Study of physical and chemical parameters in water of tilapia fish pond was done due to lack of review of water quality of tilapia fish pond. The review is based on a sampling of water, i.e. morning and afternoon. A review of the pond water quality was expected to assist fish farmers got information about the qualities of water of tilapia fish pond in physical and chemical characteristics. The method of this research was Grab (momentarily) methods in water sampling. Testing of water samples in physics done visually for color parameters, temperature using a thermometer device, and brightness parameters was using the secchi disk. In testing the chemical parameters were measurement of pH was using a pH meter Winkler method was done for the parameters of dissolved oxygen (DO). Titrimetric method was done for the parameters of total hardness, and carbon dioxide, whereas for ammonia parameter was done by spectrophotometric method were measured using UV-Vissible. After testing all the parameters then interpretation was done for the parameter data. The results showed the water quality of tilapia fish pond in the area Laladon – Bogor was not yet qualified for a good fish pond water based on ISO 7550: 2009 Product ion of tilapia growing level in calm water pond, for parameter Ammonia levels should be <0.02 mg / L, and based on PPNo.8, on water Quality Standard by 2001. The difference in the parameter levels in the morning and during the day due to the process of respiration at night by the aquatic organisms that produce CO2 gas and the process of photosynthesis during the day by plankton, microalgae, and other aquatic plants to produce a compound O2. The existence of other human activities during the day also affects the difference in the data levels in the morning and day time.Keywords: Tilapia, pond water qualityABSTRAK Air merupakan sumber daya alam yang sangat penting bagi kelangsungan hidup manusia dan makhluk lainnya, Peranan air sangat penting bagi makhluk hidup di bumi terutama ikan yang berhabitat di dalam air. Ikan membutuhkan lingkungan yang nyaman agar dapat hidup sehat dan tumbuh secara optimal. Oleh karena itu air yang digunakan sebagai sumber kehidupan bagi ikan, memiliki persyaratan tertentu. Sehingga kualitas dari air harus sangat di perhatikan. Ikan nila merupakan ikan air tawar yang memiliki nilai toleransi yang besar terhadap lingkungannya sehingga sangat diminati oleh petani ikan di Indonesia. Studi parameter fisika dan kimia pada air kolam ikan nila dilakukan karena kurangnya peninjauan terhadap kualitas air kolam ikan nila. Peninjauan tersebut dilakukan berdasarkan waktu pengambilan sampel air, yaitu pada pagi dan siang hari. Peninjauan kualitas air kolam diharapkan dapat membantu para petani ikan mendapatkan informasi mengenai kelayakan kolam ikan nila secara fisika dan kimia. Metode yang dilakukan penelitian ini adalah metode Grab (sesaat) untuk pengambilan sampel air. Pengujian sampel air secara fisika dilakukan secara visual untuk parameter warna, suhu dengan menggunakan alat pengukur suhu, dan metode secchi disk untuk parameter kecerahan. Pada pengujian parameter kimia dilakukan pengukuran pH dengan alat pengukur pH. Metode Winkler dilakukan untuk parameter dissolved oxygen (DO). Metode titrimetrik dilakukan untuk parameter s kesadahan total, dan karbondioksida, sedangkan untuk parameter ammonia dilakukan dengan metode spektrofotometri yang diukur dengan menggunakan alat spektrofotometer UV-Vissible. Setelah dilakukan pengujian semua parameter maka dilakukan interpretasi data hasil penelitian. Hasil penelitian menunjukan kualitas air kolam ikan nila di daerah Laladon – Bogor belum memenuhi syarat untuk air kolam ikan yang baik berdasarkan SNI 7550:2009 Produksi ikan nila tingkat pembesaran di kolam air tenang, untuk parameter Ammonia dengan kadar <0,02 mg/L, dan berdasarkan Baku Mutu PPNo.82 tahun 2001. Terjadinya perbedaan kadar pada pagi dan siang hari dikarenakan terjadinya proses respirasi pada malam hari oleh organisme air sehingga menghasilkan senyawa CO2 dan terjadinya proses fotosintesis pada siang hari oleh plankton, mikroalga, dan tanaman air lainnya sehingga menghasilkan senyawa O2. Adanya aktifitas lain pada siang hari juga mempengaruhi terjadinya perbedaan kadar pada pagi dan siang hari.Kata kunci : Ikan nila, Kualitas air kolam

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Influence of chemical composition and inorganic admixtures on the electrical conductivity of hydrating cement pastes

Journal of Materials Research ◽

10.1557/jmr.1989.0215 ◽

1989 ◽

Vol 4 (1) ◽

pp. 215-223 ◽

Cited By ~ 23

Author(s):

M. Perez-Pena ◽

D. M. Roy ◽

F. D. Tamás

Keyword(s):

Electrical Conductivity ◽

Cementitious Materials ◽

Heat Of Hydration ◽

Chemical Compositions ◽

Chemical Parameters ◽

Cement Pastes ◽

Rate Of Development ◽

Wide Range ◽

Physical And Chemical Parameters ◽

Physical And Chemical

Electrical conductivity of cementitious materials with a wide range of chemical compositions has been studied during the first 24 h of hydration. Relationships between heat of hydration and electrical conductivity curves are discussed. Results are tentatively explained in terms of some physical and chemical parameters. Further evidence that the electrical conductivity of hydrating cement pastes is related to the hydration mechanisms operating in these systems was obtained. The order in which the cations of inorganic admixtures (chlorides and hydroxides) were found to increase the peak and rate of development of the electrical conductivity is the same order that they have been found to increase the heat liberated upon hydration of systems containing these admixtures.

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Physical and chemical parameters of selected river waters in Davao City

UIC Research Journal ◽

10.17158/524 ◽

2016 ◽

Vol 19 (2) ◽

Cited By ~ 1

Author(s):

Noel V. Laud ◽

Hanah Jane R. Rosel ◽

Jonal T. Bungabong ◽

Terence Jay M. Resada ◽

Kenler S. Alonsagay ◽

...

Keyword(s):

Dissolved Oxygen ◽

Comparative Method ◽

Water Discharge ◽

Sediment Discharge ◽

Chemical Parameters ◽

River Waters ◽

Physical And Chemical Parameters ◽

Ph Level ◽

Physical And Chemical

The rapid increase in population, urbanization, and industrialization reduces the quality of Philippine waters, especially in densely populated areas and regions of industrial and agricultural activities. In Davao City, there is a need to regularly monitor the quality of river waters to assure their normal conditions. This study assessed the water conditions of Talomo River and Davao River. Specifically, it aimed to measure the changes in pH level, dissolved oxygen, water temperature, coliforms and transparency. A descriptive comparative method was used to evaluate the waters of the two rivers, specifically in terms of contaminants and other pollutants. In gathering data, the researchers implemented the standard chemical and physical protocols on pH level, dissolved oxygen, Coliforms, Temperature, Transparency and Visual, daily water discharge and sediment discharge measurements. Findings revealed that the waters from the two rivers have high alkalinity; with dissolved oxygen greater than 7.5 mg/L; high fecal coliform count in CFU at 16,000 colonies per 100 mL; high degree of turbidity; experience drastic change of temperature; and indicate an increase of water discharge after the rain. It also showed disparity in sediment discharge with Davao River reporting a greater value compared to Talomo River. These parameters indicate that the two rivers have deteriorated in terms of quality waters when compared to the previous assessments as reported by Environmental Management Bureau (EMB).<div> </div>Keywords:Physical and chemical parameters, Davao river, Talomo river, descriptivecomparative, Davao City, Philippines.

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Diel microdistribution of physical and chemical parameters within the dense Chara bed and their impact on zooplankton

Biologia ◽

10.2478/s11756-007-0080-x ◽

2007 ◽

Vol 62 (4) ◽

Cited By ~ 11

Author(s):

Natalia Kuczyńska-Kippen ◽

Piotr Klimaszyk

Keyword(s):

Dissolved Oxygen ◽

Open Water ◽

Chemical Parameters ◽

Physical Chemical ◽

Physical And Chemical Parameters ◽

Diurnal Distribution ◽

Main Components ◽

Zooplankton Communities ◽

Physical And Chemical ◽

Different Parts

AbstractResearch on the diurnal distribution of physical and chemical parameters within a single macrophyte bed was carried out on the shallow Wielkowiejskie Lake (Poland). A non-parametric statistical analysis was used to compare the water quality features in different parts of a Chara hispida habitat including the middle, both edge (vertical and horizontal) parts of a macrophyte plant, and the open water next to-and above the stonewort stand.The obtained results showed a differentiation in the physical-chemical parameters of the environmental conditions within the Chara hispida stand. The greatest variability was found for dissolved oxygen. Its lowest concentrations were noted in the central part of the macrophyte stand, irrespective of the sampling time.The zooplankton communities within the examined Chara bed were strongly influenced by the concentration of dissolved oxygen. It was also found that two main components of zooplankton communities (rotifers and cladocerans) had a similar trend in their spatial and diurnal distribution within the stonewort stand.

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Co-existence of Epiphytes on Eucheuma Denticulatum (Rhodophyceae) in Varying Depths Cultivated with Verti Net Method

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/934/1/012008 ◽

2021 ◽

Vol 934 (1) ◽

pp. 012008

Author(s):

N Wati ◽

M Kasim ◽

S Salwiyah

Keyword(s):

Dissolved Oxygen ◽

Current Velocity ◽

Environmental Parameters ◽

Chemical Parameters ◽

Eucheuma Denticulatum ◽

Significant Negative Effect ◽

Physical And Chemical Parameters ◽

Negative Effect ◽

Net Method ◽

Physical And Chemical

Abstract The existence of macroepiphytes is one of the issues seaweed farmers often face. This research aimed to explore the co-existence of macroepiphytes with seaweed Eucheuma denticulatum at varying depths using verti net method. Results showed that the highest and the lowest density of macroepiphyte were obtained on day -10 in the depth of 50 cm and 200 cm at 248,4 and 121,28 ind/m2/day, respectively. On day-20, in the depth of 100 cm and 200 cm the densities were 333,54 and 270,01 ind/m2/day, respectively. The most dominant macroepiphyte y is Chatomorpha crasa. Physical and chemical parameters showed a temperature of 29°-30°C, current velocity of 0,050-0,067 m/sec, brightness 92%, salinity 30-33‰, nitrate 0,237-0,0416 mg/L, phosphate 0,0015-0,0036 mg/L and dissolved oxygen 5,7-6,2 mg/L. The obtained optimum environmental parameters and the type of the macroepiphytes did not show any significant negative effect on the growth of E. denticulatum.

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Studi Parameter Fisika Kimia Air pada Areal Budidaya Ikan di Danau Tondano, Desa Paleloan, Kabupaten Minahasa

e-Journal BUDIDAYA PERAIRAN ◽

10.35800/bdp.1.2.2013.1911 ◽

2013 ◽

Vol 1 (2) ◽

Author(s):

Frits Tatangindatu ◽

Ockstan Kalesaran ◽

Robert Rompas

Keyword(s):

Water Quality ◽

Dissolved Oxygen ◽

Optimal Growth ◽

Quality Standard ◽

Chemical Parameters ◽

Culture Area ◽

Physical And Chemical Parameters ◽

Net Cage ◽

Physical And Chemical

The purpose of this research was to analyze the physical and chemical parameters of waters (temperature, turbidity, pH, dissolved oxygen, nitrate, phosphate, ammonia and BOD) around net cage culture area at Peleloan Village, Minahasa Regency and to determine the suitable culture site supporting optimal growth of fish. water quality was measured at three sites. Temperature, turbidity, and pH were measured in situ while dissolved oxygen, nitrate, phosphate, ammonia and BOD were analised in laboratorium. Research results showed water temperature at all observation sites ranged from 25.5-28.2 0C, turbidity 2.02-3.15 m, pH 6.8 – 8.2, DO 7.41-7.77 mg/L, nitrate 0.3-0.5 mg/L, phosphate 0.00-0.4 mg/L, ammonia 0.13-0.77 mg/L. Based on water quality standard criteria stated in PP No. 82, 2001, temperature, turbidity, pH, DO and nitrate at fish culture area were suitable for floating and stick net cage cultures but ammonia at all sites of observation, phosphate at site I at 0.5 m from the bottom and BOD at site III at 0.5 m from the bottom were exceeding the standard criteria. Keywords: water physical and chemical Parameters, floating net cage, Lake Tondano, Paleloan Village

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