Concentrations of total mercury and methylmercury in red snow crabs (Chionoecetes japonicus) caught off the coast of Japan

Kakimoto, Sachiko; Yoshimitsu, Masato; Akutsu, Kazuhiko; Kiyota, Kyohei; Fujiwara, Takuya; Watanabe, Takahiro; Kajimura, K.; Yamano, Tetsuo

doi:10.1016/j.marpolbul.2019.04.062

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…Furthermore, in a review of the mercury levels in C. sapidus at 11 sites along the USA Atlantic seaboard, mean muscle mercury levels ranged from 0.042 to 0.445 mg kg −1 [24]. Snow crabs Chionoecetes japonicus in Japanese waters were found to have 0.3-0.56 kg −1 levels of mercury, with a mean of 0.21 [38].…”

Section: Discussionmentioning

confidence: 99%

“…It can also readily pass across the placenta to the fetus and the fetus brain [40]. Previous analysis found that methylmercury accounts for 98-100% of the total mercury in blue crab Callinectes sapidus muscle and 93-97% in whole crabs [41], and 77-99% in red snow crab Chionoecetes japonicus muscle [38]. It is expected that methylmercury will also be the predominant form found in G. grapsus in the Galápagos Archipelago.…”

Section: Discussionmentioning

confidence: 99%

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Mercury Levels in the Crab Grapsus grapsus across the Galápagos Archipelago

Jackson,

Brandao

et al. 2024

Fishes

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The levels of mercury (Hg) were examined in the leg muscle of the crab Grapsus grapsus from five sites on four islands within the Galápagos archipelago. Mercury values obtained using a Milestone DMA 80 evo direct mercury analyzer varied both within and among sites. Total mercury concentrations (mg kg−1 dry weight) ranged from the lowest at a protected location at Isabela Island (0.06 ± 0.02) to the highest at the San Cristóbal urban location (2.04 ± 0.069). Crabs from South Plaza Island also had surprisingly high levels of mercury with a mean of 1.2 ± 0.6. Values from urban sites at Isabela Island and Academy Bay, Santa Cruz, had intermediate values. When converted to wet weight, crabs from both San Cristóbal and South Plaza were within or above the levels (0.3–0.5 mg kg−1 wet weight set by various government agencies) considered potentially harmful to human health if ingested. A lesser number of both oysters and barnacles were also analyzed for mercury at South Plaza and Academy Bay, and while the values were lower compared to the crabs, they followed the same pattern of elevated levels at South Plaza compared to Academy Bay. It is unclear as to whether the mercury comes from natural sources, such as volcanism, or anthropogenic causes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Mercury Levels in the Crab Grapsus grapsus across the Galápagos Archipelago

Jackson,

Brandao

et al. 2024

Fishes

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“…Some are heavy metals, whose concentrations can exceed the allowable values, such as in East China marine sediment [ 3 ]. In other cases, the pollutants are microplastics, such as those detected in the sediment of the Baltic Sea [ 4 ], in the Atlantic Ocean [ 5 ], and on the Japanese shore [ 6 ]. In this sense, aquaculture is a promising alternative to guarantee that high-quality ingredients are obtained from good management practices applied in aquatic resources.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Collagen from Three Genetic Lines (Gray, Red and F1) of Oreochromis niloticus (Tilapia) Skin in Young and Old Adults

et al. 2022

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From tilapia (Oreochromis niloticus) farming, the by-products have been identified as a source of collagen that could be used for the development of dermocosmetics or pharmaceutical products. However, the characteristics of collagen related to a specific strain or culture must be well defined prior to its application. Collagen was extracted from the skin of three strains of tilapia: red YY males (YY: two Y-type sex chromosomes), XX gray females, and the F1: offspring of crossing red YY males with XX gray females; at different ages in the adult phase, using acetic acid and pepsin enzyme. The characteristics of acid-soluble collagen (ASC) and pepsin-soluble collagen (PSC) were shown by SDS-PAGE band profiles to be similar to bovine collagen type I (SIGMA), the PSC of gray tilapia being more fragile to temperature changes, consistent with the results of fractional viscosity. The characteristics of the F1 progeny were prioritized for being a commercially productive and sustainable source for the extraction of collagen, and the ASC form, being the one with the greatest stability and advantage over PSC, of importance to our investigations, leads to a controlled digestion as in the case of peptide induction, and also in the development of natural products in the pharmaceutical and/or dermocosmetic industry. Evaluations of the triple helix structure by FT-IR, X-ray diffraction and UV–visible spectroscopy give similar results between the strains: red, gray, and F1, and between ages in the adult form F1 (15, 24, and 36 months of age). Consequently, the skin of tilapia in adult form is recommended sustainably for up to 24 months of age where the collagen is obtained with the use of acetic acid without enzymatic treatment.

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