Heavy metals in tissues from loggerhead turtles (Caretta caretta) from the southwestern Mediterranean (Spain)

García-Fernández, Antonio J.; Gómez‐Ramírez, Pilar; Martínez-López, Emma; Hernández-García, A.; María-Mójica, Pedro; Romero, Diego; Castillo, Juan José; Bellido, Juan Jesús

doi:10.1016/j.ecoenv.2008.05.003

Cited by 63 publications

(40 citation statements)

References 44 publications

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“…We have also made comparisons with other species (Dermochelys coriacea, Chelonia mydas or Natator depressus) when the information was deemed relevant. To enable comparisons, all published results in dry weight have been estimated regarding wet weight using the humidity percentage content in blood (80%) reported by Guirlet et al (2008) and obtained by García-Fernández et al (2009) for liver and kidney (75% and 64% respectively). Finally, according to Walton (2001), our number of samples (41 blood and 13 tissues) suggest a probability of 99% (in blood) or 50% (in tissues) that the population will be fall between the lower and upper limits of the observed values.…”

Section: Discussionmentioning

confidence: 99%

“…In marine turtles, as in mammals, Cd does not perform any known role in biological systems, and it is only poorly excreted, resulting in long-term storage, specially in kidney, organ to which Cd shows a clear tropism (Storelli and Marcotrigiano, 2003;Frías-Espericueta et al, 2006;Andreani et al, 2008;Storelli et al, 2008;García-Fernández et al, 2009;D'Ilio et al, 2011). Usually, Cd accumulation in liver and kidney is mainly due to the binding of this metal by metallothionein (MT) (Andreani et al, 2008), which is heavy metal regulatory and detoxifying intracellular proteins to both physiological (Zn, Cu, Se) and xenobiotic (Cd, Pb, As) elements (ATSDR, 1999a and ATSDR, 1999b; Cherian et al, 2003;Andreani et al, 2008).…”

Section: Cadmiummentioning

confidence: 99%

“…Biomonitoring of long-living species has become an important tool in biotoxicology because it can serve both to provide baseline measurements for further studies into the health status of this population and to increase knowledge about the pollution levels in the areas where these turtles live. Furthermore, data regarding those contaminants are scarce and widely dispersed across the world, taken in regions such as Australia (Gordon et al, 1998), US (Aguirre et al, 1994;Homer et al, 2000;Perrault et al, 2011), Japan Sakai et al, 2000), UK (Godley et al, 1998), Mediterranean Coast (Storelli et al, 1998 andStorelli et al, 2005;Godley et al, 1999;Storelli and Marcotrigiano, 2003;Franzellitti et al, 2004;Kaska et al, 2004;Maffuci et al, 2005;García-Fernández et al, 2009;Jerez et al, 2010), African Atlantic (Torrent et al, 2004;Camacho et al, 2013) and Brazil (Carneiro da Silva et al, 2013).…”

Section: Introductionmentioning

confidence: 97%

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Metals and metalloids in whole blood and tissues of Olive Ridley turtles ( Lepidochelys olivacea ) from La Escobilla Beach (Oaxaca, Mexico)

Cortés-Gómez

Fuentes-Mascorro

Romero

2014

Marine Pollution Bulletin

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Section: Discussionmentioning

confidence: 99%

Section: Cadmiummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Metals and metalloids in whole blood and tissues of Olive Ridley turtles ( Lepidochelys olivacea ) from La Escobilla Beach (Oaxaca, Mexico)

Cortés-Gómez

Fuentes-Mascorro

Romero

2014

Marine Pollution Bulletin

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“…Sublethal exposure to certain heavy metals during the developing stages can alter gonadal steroid hormones, as well as adrenal and thyroid hormones (Colborn 2002;Dawson 2000), which could be the cause of potentially serious effects on the survival of certain particularly sensitive or vulnerable populations (García-Fernández et al 2009). Among metals, lead and cadmium are of special concern due to their toxicity and because they are common environmental contaminants.…”

Section: Introductionmentioning

confidence: 99%

Blood δ-ALAD, lead and cadmium concentrations in spur-thighed tortoises (Testudo graeca) from Southeastern Spain and Northern Africa

et al. 2009

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Mediterranean spur-thighed tortoise (Testudo graeca) is actually included in the IUCN as vulnerable species. Its main European population is located in southeastern Spain. Although a great deal of information has been acquired on the internal medicine and survey and even parasitological fauna on these animals, there are no references about contaminants levels in this species. The objectives of this study were to compare the levels of two metals (cadmium and lead) in the blood of spur-thighed tortoises from two different populations, one from Southeastern of Spain (n = 22) and the other from North of Africa (n = 39), kept in captivity at the Santa Faz Recuperation Centre (Alicante, Spain) and to investigate the relationship between their blood levels of lead and their blood delta-aminolevulinic acid dehydratase (delta-ALAD) activity. Blood lead and cadmium concentrations were higher in tortoises from African than in those from Spain. Moreover, a negative and significant correlation (P < 0.05) was found between delta-ALAD activity and blood lead levels, indicating the suitability of this enzyme as biomarker for lead in this species.

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“…[10][11][12]). The substitution approach has been used in the development of recent databases of radionuclide transfer parameters for wildlife where <20% of the data were LOD values, compiled under European Commission and International Atomic Energy Agency programmes [13][14][15].…”

Section: Current Norms In Environmental Radioactivity Researchmentioning

confidence: 99%

Limit of detection values in data analysis: Do they matter?

2011

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Abstract. Data sets containing values below the limit of detection (LOD) are known as 'censored data sets'. Such data sets are encountered regularly in most fields of environmental contaminant research. The current norm within environmental radioactivity research is to use substitution methods when analysing data sets that include values below the LOD, commonly replacing each LOD value with a value equal to half the LOD (LOD/2). However, this approach has no statistical basis and has implications when summarising or comparing data sets because it can lead to underestimates or overestimates of both the mean and the standard deviation. To remove the need to apply substitution methods, over the last four decades other fields of environmental science have been adopting statistical techniques developed for medical research applications. Despite the long history of applying these techniques in other fields and two recent environmental radioactivity publications that have used survival analysis techniques, there still seems to be reluctance within the environmental radioactivity research community to adopt these 'new' methods. This paper introduces the statistical techniques that can be used in place of LOD substitution, presents some guidance on the applicability of these techniques for different levels of data censoring and provides some examples of the use of these methods in various contexts. It is hoped the present paper will contribute to the evidence-base supporting the use of survival analysis within the field of environmental radioactivity research and go some way to changing the current norm of substitution using LOD/2.

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Heavy metals in tissues from loggerhead turtles (Caretta caretta) from the southwestern Mediterranean (Spain)

Cited by 63 publications

References 44 publications

Metals and metalloids in whole blood and tissues of Olive Ridley turtles ( Lepidochelys olivacea ) from La Escobilla Beach (Oaxaca, Mexico)

Metals and metalloids in whole blood and tissues of Olive Ridley turtles ( Lepidochelys olivacea ) from La Escobilla Beach (Oaxaca, Mexico)

Blood δ-ALAD, lead and cadmium concentrations in spur-thighed tortoises (Testudo graeca) from Southeastern Spain and Northern Africa

Limit of detection values in data analysis: Do they matter?

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