Moisture content in Dall's porpoise (Phocoenoides dalli) tissues: a reference base for conversion factors between dry and wet weight trace element concentrations in cetaceans

Yang, Jian; Miyazaki, Nobuyuki

doi:10.1016/s0269-7491(02)00239-7

Cited by 49 publications

(17 citation statements)

References 8 publications

(16 reference statements)

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“…Concentrations are expressed on a ww basis . Dry weight (dw) basis concentrations in the literature were converted to wet weight (ww) basis concentrations, assuming a moisture content of 70 % based on the results of Yang and Miyazaki (2003). The mean concentration of total Hg was 0.4 ± 0.16 lg g -1 ww, ranging from 0.07 to 0.79 lg g -1 ww (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Mercury Status of the Amazon Continental Shelf: Guiana Dolphins (Sotalia guianensis, Van Benédén 1864) as a Bioindicator

Moura

Emin-Lima

Hacon

et al. 2012

Bull Environ Contam Toxicol

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Total mercury (Hg) was analyzed in muscle tissue of 27 accidentally captured Guiana dolphins (Sotalia guianensis) in order to evaluate Hg contamination levels present in the Amazon Continental Shelf, in Amapá state, North Brazil. The samples showed a mean concentration of 0.4 ± 0.16 μg/g wet weight (ww), ranging from 0.07 to 0.79 μg/g ww. As observed in several other cetacean species, Hg concentrations presented positive correlations to body length, related to the capacity to bioaccumulate this element throughout life. Hg concentrations were not significantly different between males (mean = 0.38 μg/g ww; n = 15) and females (mean = 0.42 μg/g ww; n = 12). Concentrations were low when compared to results of studies carried out with small cetaceans in the Northern Hemisphere, and with some previous studies in the south-eastern region of Brazil. In contrast with high Hg concentrations normally detected in river dolphin samples from Amazon River tributaries, our results suggest that the Amazon coast contains low levels of Hg in bioavailable form.

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Section: Resultsmentioning

confidence: 99%

Mercury Status of the Amazon Continental Shelf: Guiana Dolphins (Sotalia guianensis, Van Benédén 1864) as a Bioindicator

Moura

Emin-Lima

Hacon

et al. 2012

Bull Environ Contam Toxicol

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“…For analysis of total trace element concentration in liver tissue, 1-5 g of fresh sample was first cut and dried for 12 h at 80°C (Yang and Miyazaki, 2003). About 0.1 g of the dried sample was then weighed in a Teflon PTFE tube, and 1.5 ml purified HNO 3 was added.…”

Section: Methodsmentioning

confidence: 99%

Total and subcellular distribution of trace elements in the liver of a mother–fetus pair of Dall's porpoises (Phocoenoides dalli)

Jian¹,

Kunito²,

Anan³

et al. 2004

Marine Pollution Bulletin

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“…The reported concentrations for both elements are expressed on a wet weight basis in ng/g. Dry weight conversion were performed according Yang and Miyazaki (2003).…”

Section: Cu and Zn Assaymentioning

confidence: 99%

Metallothioneins pattern during ontogeny of coastal dolphin, Pontoporia blainvillei, from Argentina

Polizzi¹,

Romero²,

Boudet³

et al. 2014

Marine Pollution Bulletin

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a b s t r a c tMetallothioneins are signals of metal exposure and widely used in biomonitoring. Franciscana dolphin is an endemic cetacean from the Southwestern Atlantic Ocean, classified as Vulnerable A3d by the IUCN. Metallothionein, copper and zinc in Franciscana were assessed in two geographic groups; one inhabits La Plata River estuary, anthropogenically impacted, and the other inhabits marine coastal ecosystems, with negligible pollution. Despite the environment, hepatic and renal MT concentrations were similar, but there was a declining trend from early to later developmental stages. Metallothionein K/L, Cu and Zn levels corresponded to normal reported ranges. MT was not related with Cd. Fetal concentrations were higher than its mother. These results and the health status of dolphins are suggesting that MT correspond to physiological ranges for the species, and they are closely to homeostasis of Zn and Cu, according to its ontogenetic changes. The information constitutes the first MT information on Franciscana dolphin and can be considered as baseline for the species conservation.

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Moisture content in Dall's porpoise (Phocoenoides dalli) tissues: a reference base for conversion factors between dry and wet weight trace element concentrations in cetaceans

Cited by 49 publications

References 8 publications

Mercury Status of the Amazon Continental Shelf: Guiana Dolphins (Sotalia guianensis, Van Benédén 1864) as a Bioindicator

Mercury Status of the Amazon Continental Shelf: Guiana Dolphins (Sotalia guianensis, Van Benédén 1864) as a Bioindicator

Total and subcellular distribution of trace elements in the liver of a mother–fetus pair of Dall's porpoises (Phocoenoides dalli)

Metallothioneins pattern during ontogeny of coastal dolphin, Pontoporia blainvillei, from Argentina

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