Seawater Salinity
Mostrando 1-12 de 59 artigos, teses e dissertações.
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1. Assessing the growth of Arctic charr (Salvelinus alpinus) (Linnaeus, 1758) in four salinities, under experimental conditions
Resumo Estudos em Salvelinus alpinus, Charr Ártico, indicam que tem baixa capacidade de hiposmorregulação ou adaptação ao mar em períodos de inverno nas águas do Ártico. A investigação determina o melhor nível de salinidade para cultivar esta espécie no Chile. Determinou-se o peso adequado para se unir ao mar pela análise da atividade da Na +, K
Braz. J. Biol.. Publicado em: 02/12/2019
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2. Salinity and stable oxygen isotope relationship in the Southwestern Atlantic: constraints to paleoclimate reconstructions
Abstract: Stable isotopes have been widely used in the literature both to discuss current ocean circulation processes, as well as to reconstitute paleoceanographic parameters. The distribution of oxygen and deuterium stable isotopes in seawater (δ18Osw and δDsw) at the Western Tropical South Atlantic border was investigated to better understand the main fr
An. Acad. Bras. Ciênc.. Publicado em: 30/09/2019
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3. Effects of salinity on the physiology of the red macroalga, Acanthophora spicifera (Rhodophyta, Ceramiales)
ABSTRACT Salinity is an important abiotic factor since it is responsible for the local and/or regional distribution of algae. In coastal regions, salinity changes with prevailing winds, precipitation and tide, and particularly in extreme intertidal conditions. Acanthophora spicifera is a red seaweed that occurs in the supratidal region in which changes in ab
Acta Bot. Bras.. Publicado em: 21/09/2017
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4. Strategy for Correction of Matrix Effect on the Determination of Pesticides in Water Bodies Using SPME-GC-FID
This paper investigates a strategy as a quality control parameter, using standard surrogate and determination of a relation factor for determination of parathion-methyl, chlorpyriphos and cypermethrin pesticides in environmental aqueous matrices with distinct characteristics (river water, estuarine, seawater and weir water), using the technique of solid phas
J. Braz. Chem. Soc.. Publicado em: 2017-06
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5. Occurrence of potentially pathogenic Vibrio in oysters (Crassostrea gigas) and waters from bivalve mollusk cultivations in the South Bay of Santa Catarina
Introduction This research aimed to identify and quantify potentially pathogenic Vibrio from different cultivations of bivalve shellfish in the State of Santa Catarina, Brazil, and water regions in the South Bay, as well as correlate the incidence of these microorganisms with the physicochemical parameters of marine waters. Methods Between October 2008 an
Rev. Soc. Bras. Med. Trop.. Publicado em: 2014-06
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6. Growth and osmoregulation in Salmo salar L. juveniles 1+, 1½ + and 2+ reared under restrained salinity
The freshwater phase of Atlantic salmon Salmo salar L vary between one and eight years. The reduction of the freshwater phase is desirable to reduce freshwater usage, human resources and to increase year round availability of pan-sized salmon. Three trials were conducted to investigate the possibility of supply the market in a year-round basis, with pan-size
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-02
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7. PCA: uma ferramenta para identificação de traçadores químicos para água de formação e água de injeção associadas à produção de petróleo
This study describes the use of Principal Component Analysis to evaluate the chemical composition of water produced from eight oil wells in three different production areas. A total of 609 samples of produced water, and a reference sample of seawater, were characterized according to their levels of salinity, calcium, magnesium, strontium, barium and sulphate
Quím. Nova. Publicado em: 2013
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8. Zooplankton of an urban coastal lagoon: composition and association with environmental factors and summer fish kill
Zooplankton may be regarded as a sensitive tool for monitoring environmental variations in coastal lagoons due to their ability to immediately react to changes in the water column trophic features and salinity levels. As a coastal lagoon with a broad history of anthropic influence, Rodrigo de Freitas Lagoon (Rio de Janeiro, Brazil) is widely used for water s
Zoologia (Curitiba). Publicado em: 2011-06
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9. Levantamento dos níveis de radioatividade natural em águas do alto Vale do Ribeira à planície costeira do litoral sul do Estado de São Paulo / Assessment of natural radioctivity levels in waters from Higher Ribeira Valley until the southern Sao Paulo State coastal plain
The complex exchange of fluvial, subsurface and seawater within a coastal area directly affects global biogeochemical cycles and the application of isotopic tracers, mainly natural radionuclides from U and Th series, is a powerful tool to track sources and sinks of trace elements and nutrients to this systems. The unique Ra signature applied to quantify the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/11/2010
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10. Efeito da salinidade da água do mar no rendimento, composição e atividades biológicas de frações polissacarídicas da Chlorophyta Caulerpa cupressoides var. flabellata
Polissacarídeos sulfatados de algas marinhas têm sido descritos por apresentarem diversas atividades farmacológicas. No entanto, nada se sabe a respeito da influência da salinidade da água do mar na estrutura de polissacarídeos sulfatados de algas verdes e nas atividades farmacológicas por eles desempenhadas. Por isso, objetivo principal deste trabalh
Publicado em: 2010
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11. Effects of temperature and stocking density on the growth and survival of juvenile of Litopenaeus schmitti. / Efeito da temperatura e densidade de estocagem no crescimento e sobrevivência de juvenis de Litopenaeus schmitti.
The white shrimp Litopenaeus schmitti is considered a promising species concerning aquaculture; however, there is limited information regarding its growth in captivity. This study aimed to evaluate the effects of temperature and stocking density, as well as the juvenile survival rate of raised L. schmitti in captivity. This study was carried out at the Marin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/09/2009
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12. Biodegradação de óleo diesel por candida lipolytica em água do mar.
The biodegradation of hydrocarbons by natural population of microorganism represents one of the primary mechanisms by which diesel oil and others hydrocarbons pollutants are eliminated or transformed in the environment. It is generally accepted today that petroleum hydrocarbon, can be degraded by microorganisms as long as a few factors, such as nutrients, or
Publicado em: 2009