Biomonitoring Studies Performed with European Eel Populations from the Estuaries of Minho, Lima and Douro Rivers (NW Portugal)

Gravato, Carlos; Faria, Melissa; Alves, Anabela; Santos, Joana; Guilhermino, Lúcia

doi:10.1007/978-1-4020-6364-0_30

Cited by 3 publications

(3 citation statements)

References 54 publications

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“…For example, the exposure of eels to pollution during their development is inducing changes on the biomarkers involved in physiological functions that are determinants for the survival and performance of the eels, namely biotransformation enzymes and antioxidative stress defences, and these alterations may have negative effects on sexual development. In addition, the mechanisms used to face chemical stress need energy which is probably allocated from other functions, such as tissue repair, growth and weight increase, and which are determinants for a successful migration into the reproduction area (Gravato et al, 2008). Ideally, aquaculture operations would be planned with background knowledge of the ecosystems in which the facilities will operate as well as knowledge of the potential environmental, social, and economic effects (both positive and negative) that could be incurred, and the cost:benefit ratio associated with operating, given knowledge of that background (Bergh, 2007).…”

Section: Environmental Impact Of Antibacterial Use In Aquaculturementioning

confidence: 99%

Antibacterial Drugs in Fish Farms: Application and Its Effects

Sekkin¹,

Kum²

2011

Recent Advances in Fish Farms

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The world keeps changing. There are always risks associated with change. To make careful risk assessment it is always needed to re-evaluate the information according to new findings in research. Scientific knowledge is essential in determining the strategy for fish farming. This information should be updated and brought into line with the required conditions of the farm. Therefore, books are one of the indispensable tools for following the results in research and sources to draw information from. The chapters in this book include photos and figures based on scientific literature. Each section is labeled with references for readers to understand, figures, tables and text. Another advantage of the book is the "systematic writing" style of each chapter. There are several existing scientific volumes that focus specially on fish farms. The book consists of twelve distinct chapters. A wide variety of scientists, researchers and other will benefit from this book.

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Section: Environmental Impact Of Antibacterial Use In Aquaculturementioning

confidence: 99%

Antibacterial Drugs in Fish Farms: Application and Its Effects

Sekkin¹,

Kum²

2011

Recent Advances in Fish Farms

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“…Lutra lutra) (Sousa et al, 2008a). Although Minho estuary is considered a reference estuary in ecotoxicological studies due to relatively low human pressures (Cairão et al 2004, Monteiro et al, 2007Moreira et al, 2006), several studies indicated the presence of metals in water, sediments and species (Filgueiras et al, 2004;Gravato et al, 2008;MilHomens et al, 2013;Reis et al, 2009aReis et al, ,b, 2014. Minho estuary is also a threatened area by potential chemical spills, due to its geographical location (Neuparth et al, 2013(Neuparth et al, , 2011.…”

Section: Brief Characterizationmentioning

confidence: 96%

A framework to assess the vulnerability of estuarine systems for use in ecological risk assessment

Ribeiro

Costa

Guilhermino

2016

Ocean & Coastal Management

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“…The activity of the enzymes acetylcholinesterase (AChE), lactate dehydrogenase (LDH), ethoxyresorufin-Odeethylase (EROD) activity of the P450 system, and glutathione S-transferases (GST) have been used in Ecotoxicology mainly because they are involved in neurotransmission, energy production and detoxification, respectively, which are determinant for animal survival and performance (Cajaraville et al 2000;Ferreira et al 2004;Moreira et al 2004;Cunha et al 2005;Quintaneiro et al 2006;Monteiro et al 2007). In recent years, non-enzymatic and enzymatic antioxidants such as reduced (GSH) and oxidised glutathione (GSSG) and their ratio (GSH/GSSG), glutathione peroxidase (GPx), glutathione reductase (GR), superoxide dismutase (SOD), catalase (CAT), as well as lipid peroxidation (LPO), have also been widely used as environmental biomarkers (van der Oost et al 2003;Buet et al 2006;Gravato et al 2007;Lima et al 2007) since several pollutants are able to cause oxidative stress. The activity of the enzyme sodium/potassium adenosine triphosphatase (Na ?…”

Section: Introductionmentioning

confidence: 99%

Yellow eel (Anguilla anguilla) development in NW Portuguese estuaries with different contamination levels

et al. 2009

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The aims of the present study were to compare the health status of yellow eels (Anguilla anguilla) developing in three estuaries of the NW Portuguese coast with different levels of pollution and their physiological responses to combined effects of environmental variation and pollution. For this, a field study was performed using a multi-parameter approach, including eels condition indexes and biomarkers, water quality variables and other environmental factors. Sixteen biological parameters were assessed, namely: hepatosomatic index (LSI), Fulton's condition index (K), lipid peroxidation (LPO), total glutathione (TG), reduced glutathione (GSH), oxidised glutathione (GSSG), GSH/GSSG, and the activity of the enzymes acetylcholinesterase (AChE), lactate dehydrogenase (LDH), sodium-potassium ATPase (Na(+)/K(+)-ATPase), ethoxyresorufin O-deethylase (EROD), glutathione S-transferases (GST), catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx) and glutathione reductase (GR). Ten environmental factors were also measured in water: temperature, salinity, pH, phosphates, nitrates, nitrites, ammonium, silica, phenol and hardness. Globally, the biomarkers indicate exposure and toxic effects of pollutants on eels living in contaminated estuaries. The relationships between biological and environmental variables were assessed through redundancy analysis. K and LSI indexes, AChE and Na(+)/K(+)-ATPase, total glutathione levels and the antioxidant enzymes CAT, GR, and SOD where the factors most discriminating reference (Minho River estuary) from contaminated estuaries (Lima and Douro Rivers estuaries). Moreover, the most striking outcomes of pollutants exposure on biological responses were observed during winter, probably due to a joint effect of cold weather and pollution stress. Altogether, the results indicate that the development of eels in the polluted estuaries of Lima and Douro rivers is interfering with physiological functions determinant for their survival and performance. This may increase the mortality rates during the continental life-phase of the species and decrease the percentage of animals able to successfully complete their oceanic migration and, thus, reduce the contribution of each generation to the next one.

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Biomonitoring Studies Performed with European Eel Populations from the Estuaries of Minho, Lima and Douro Rivers (NW Portugal)

Cited by 3 publications

References 54 publications

Antibacterial Drugs in Fish Farms: Application and Its Effects

Antibacterial Drugs in Fish Farms: Application and Its Effects

A framework to assess the vulnerability of estuarine systems for use in ecological risk assessment

Yellow eel (Anguilla anguilla) development in NW Portuguese estuaries with different contamination levels

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