Bioaccumulation and Trophic Transfer of Heavy Metals in

Overview

This source page is a mechanical bulk-ingest record for a PDF in the methylmercury infant-formula research pull. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.

Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

• Development (NIMRD) “Grigore Antipa”, 300 Mamaia Blvd., 900581 Constanta, Romania; aoros@alpha.rmri.ro
• Received: 11 February 2025 in maintaining biodiversity, regulating food webs, and supporting nutrient cycling (1).
• Revised: 29 March 2025 In addition to their ecological importance, marine fish have significant economic value
• where seafood supports livelihoods and local economies (2). The fishing industry further
• 2025, 15, 59. https://doi.org/10.3390/ has emerged as one of the most persistent environmental challenges. Heavy metals (HMs)
• jox15020059 such as mercury (Hg), cadmium (Cd), and lead (Pb) are highly toxic and non-degradable,
• Copyright: © 2025 by the author. allowing them to persist in aquatic environments long after their initial introduction (4).
• distributed under the terms and pollutants at much higher rates than natural sources (5–7).
• licenses/by/4.0/). bodies (8). Agricultural activities also play a role, as fertilizers and pesticides containing
• increasing contamination levels (9). Additionally, fossil fuel combustion, especially from
• nants across wide oceanic regions (11). Over time, metals accumulate in marine sediments,
• where they act as long-term reservoirs of contamination (12). These sediments serve as
• where they can be absorbed by plankton, benthic organisms, and fish (13). Through this
• ments, and diet (15–17). Bioaccumulation causes metals to progressively build up in fish
• contaminated seafood (18). Heavy metal contamination disrupts marine biodiversity and
• ets accumulate hazardous concentrations of toxic metals (19). Given these risks, continuous
• and human health from the long-term impacts of heavy metal pollution (20).
• strategies to mitigate the long-term effects of heavy metal contamination (22).
• published between 2015 and 2024, using the keywords “heavy metals” AND “marine fish”
• AND “bioaccumulation”. After applying the inclusion criteria, 141 relevant articles were
• total number of reviewed studies to 235. The findings from this literature review have
• viewer (24,25) on the selected Web of Science records, focusing on co-occurrence anal-
• coupling (to reveal research clusters based on shared references). Figure 1 presents a cita-
• 10 citations from other documents within the dataset are shown. Each node represents a
• similarity of their citation relationships. This map highlights the most locally4 of 38
• J. Xenobiot. 2025, 15, x FOR PEER REVIEW influential
• Figure 1. Citation network of the selected Web of Science records (minimum local citations ≥ 10)
• Figure 1. Citation network of the selected Web of Science records (minimum local citations ≥ 10) (18,26–42).
• 3. Bioaccumulation of Heavy Metals in Marine Fish, Trophic Transfer,
• Figure 2b shows the bibliographic coupling network of sources, highlighting journals
• 3. Bioaccumulation of Heavy Metals in Marine Fish, Trophic Transfer,
• dermal absorption, and ingestion of contaminated prey or sediments (50,51). The extent
• mechanisms in marine fish is provided in Tables 1 and 2.
• dermal absorption, and ingestion of contaminated prey or sediments (50,51). The extent of
• physiological traits of the fish species (52).
• initial detoxification processes (26,53,54). In benthic environments, dermal contact with
• report higher metal levels in demersal fish than in pelagic species (27,43,55–57).
• tions (28,44). Seasonal influences have also been recorded, with higher bioaccumulation
• noted during dry periods when metal concentrations are less diluted (29).
• tention (5,30,56). Methylmercury, being lipophilic, tends to accumulate in fatty tissues,
• particularly muscle (58). These retention patterns are directly linked to metal toxicity
• tracing shows that it plays a major role in the total metal burden (60). Such multi-pathway

Methods (brief)

• 2022 (69) species collected from levels due to anthropogenic inputs, while offshore fish
• Diplodus bellottii, Caranx of Cd, Pb, and Fe—particularly in benthic feeders—due to
• et al., 2019 (38) America)/streaked prochilod concentrating silver, copper, mercury, and zinc, while muscle tissues
• (Prochilodus lineatus)/Ag, As, showed lower metal levels. Non-muscle tissues exhibited selective
• 2022 (69) samples from various increasing with the trophic level, while copper biomagnified only in offshore
• species collected from fish, suggesting regional environmental or dietary influences. In contrast,
• 77. Al Solami, L. Heavy Metal Content in Coral Reef-Associated Fish Collected from the Central Red Sea, Saudi Arabia. Ocean.
• Fish Collected from Southeast Coast, Tamil Nadu, India: Implication on Pollution. Reg. Stud. Mar. Sci. 2023, 66, 103167. (CrossRef)
• 125. Friedmann, A.S.; Kimble Costain, E.; MacLatchy, D.L.; Stansley, W.; Washuta, E.J. Effect of Mercury on General and Reproductive
• mass spectrometry enables the visualization of organic matter chemotype shifts in coastal seawater. Chemosphere 2021, 271, 129450.
• 183. Gullestad, P.; Abotnes, A.M.; Bakke, G.; Skern-Mauritzen, M.; Nedreaas, K.; Søvik, G. Towards Ecosystem-Based Fisheries
• 215. Mermillod-Blondin, F.; Rosenberg, R. Ecosystem Engineering: The Impact of Bioturbation on Biogeochemical Processes in Marine
• 216. Mermillod-Blondin, F. The Functional Significance of Bioturbation and Biodeposition on Biogeochemical Processes at the

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

• Fish — marine, predatory (tuna, swordfish, shark, king mackerel)
• Fish — marine, non-predatory (sardines, anchovies, salmon, cod)
• Shellfish (shrimp, crab, lobster, clams, oysters, mussels)
• Seaweed/kelp foods (nori, wakame, kombu, dulse — as food products)
• Mercury
• Mercury
• Cadmium
• Lead
• Arsenic
• Nickel
• Aluminum
• Tin
• Chromium

Verification notes

• Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing wiki/sources/ pages before creation.
• Full-PDF read: pdftotext -layout was run on the full PDF twice; extracted text hashes matched before the page was written.
• Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
• Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
• HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.