Nutrient composition of the marine snail (<i>Hexaplex trunculus</i>) from the Tunisian Mediterranean coasts

Zarai, Zied; Frikha, Fakher; Balti, Rafik; Miled, Nabil; Gargouri, Youssef; Mejdoub, Hafedh

doi:10.1002/jsfa.4309

Cited by 34 publications

(38 citation statements)

References 34 publications

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“…Indeed, this station located in the Bizerte lagoon is characterized by low hydrodynamics leading to high accumulation of contaminants. The concentrations registered in the present analyses (35.4-179.0 μg/g dw) are lower than those reported in H. trunculus from Sfax (243-534 μg/g dw; Zarai et al 2011). The Cr contamination in the studied stations was weak and decreased throughout the sampling period.…”

Section: Discussioncontrasting

confidence: 83%

“…In SF, the phosphoric acid factory started reducing its activity since many years, aiming to cease definitely the production in 2016, after being transferred to a non-coastal area in order to protect the marine environment around Sfax. Compared to analogous studies, the present levels of Cu in H. trunculus (31.9-363.1 μg/g dw) are higher than those reported for this species in the Bizerte lagoon (8-235, 41.6-241.1), France (33-134), and Spain (17.7-47.2) (Roméo et al 2006;Gharbi-Bouraoui et al 2008;Catsiki and Arnoux 1987;María-Cervantes et al 2009) but lower than those registered in Sfax (450.9 μg/g dw) and Italy (976 μg/g dw) (Lorenzini and Orlando 1994;Zarai et al 2011).…”

Section: Discussionmentioning

confidence: 59%

“…Regarding the Zn concentrations in H. trunculus recorded in the present study (197-564.6 μg/g dw), these values are in the same range of those reported in France (540-744 μg/g dw) and Italy (520 μg/g dw) (Catsiki and Arnoux 1987;Lorenzini and Orlando 1994). In contrast, higher concentrations were registered in the Bizerte lagoon (up to 1320 μg/g dw, Roméo et al 2006), Sfax (675.6 μg/g dw; Zarai et al 2011), and Spain (up to 3130 μg/g dw, María-Cervantes et al 2009). …”

Section: Discussionmentioning

confidence: 82%

“…In the same species, higher concentrations were detected in Sfax (29.98-42.15 μg/ g dw, Zarai et al 2011). In July 2010, Ni concentrations in the crab C. maenas were below the LOD in MJ and were 5.5-5.7 μg/g dw in the Bizerte channel (Ben Khedher et al 2014).…”

Section: Discussionmentioning

confidence: 86%

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Bioaccumulation of trace metals in Hexaplex trunculus: spatial and temporal trends from 2004 to 2011 along the Tunisian coast

Lahbib

Mleiki

Menif

2016

Environ Sci Pollut Res

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Cd, Zn, Cu, As, Fe, Cr, Ni, Al, and Pb were analyzed in the edible and inedible parts of the muricid gastropod Hexaplex trunculus sampled along the Tunisian coast in 2004, 2007, and 2011. The concentration ranges (μg/g dry weight) in the whole soft tissue were 0.1-19.2 for Cd, 198.7-564.6 for Zn, 31.9-363.1 for Cu, 12.8-177.8 for As, 35.4-179.0 for Fe, 0.0-5.8 for Cr, 0.1-4.6 for Ni, 1.0-41.4 for Al, and 0.0-0.6 for Pb. The highest concentrations were recorded in Gabès for Cd, Menzel Jemil for Zn and Cu, Bizerte channel for As, Zarat for Cr and Pb, and Tunis North Lake for Fe, Al, and Ni. The European standards compiled by FAO for mollusks were exceeded in several localities. The temporal trends revealed a decreasing metal contamination in most sampling stations from 2004 to 2011. The calculated intake of metals (μg/week/kg body weight) through human consumption of the snail edible portion varied from 0.0 to 4.4 of Cd, 55.9 to 172.1 of Zn, 8.7 to 92.7 of Cu, 3.0 to 42.6 of As, 9.5 to 49.1 of Fe, 0.0 to 1.52 of Cr, 0.0 to 1.4 of Ni, and 0.3 to 11.4 of Al. Comparison of these metal intakes with those of the standard provisional tolerable weekly intake (PTWI) values stipulated by the WHO recommends precaution in terms of human consumption of this marine snail.

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Section: Discussioncontrasting

confidence: 83%

Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 86%

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Bioaccumulation of trace metals in Hexaplex trunculus: spatial and temporal trends from 2004 to 2011 along the Tunisian coast

Lahbib

Mleiki

Menif

2016

Environ Sci Pollut Res

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“…By comparison, studies on predatory gastropod whelks have generally found higher protein than that reported for herbivores, for example, the Muricidae Chicoreus ramosus 36% (Xavier Ramesh and Ayyakkannu ); Hexaplex trunculus 48% (Zarai et al. ); Rapana venosa 55.88 ± 2.04% (Celik et al. ) and as high as 80% in Thais haemastoma (Belisle and Stickle ).…”

Section: Discussionmentioning

confidence: 88%

Investigation of nutritional properties of three species of marine turban snails for human consumption

Lah

Smith

Savins

et al. 2016

Food Science & Nutrition

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Turban snails (family Turbinidae) are gastropod molluscs that are harvested for human consumption yet little is known about the nutritional properties of these snails, particularly from Australian waters. This study compares the proximate composition (ash, moisture, protein, and lipid content), fatty acid profiles, mineral, and trace element content of three species of turbinid snails; Turbo militaris, Lunella undulata, and Lunella torquata from northern New South Wales, Australia. They were all found to have relatively high protein in their flesh (16.0% to 18.5% of the fresh weight). L. torquata had a significantly higher lipid content (8.5% w/w) than L. undulata (5.2% w/w), whereas T. militaris (5.6% w/w) was not significantly different to either. Analysis with gas chromatography showed there was no significant difference in monounsaturated fatty acid (MUFA) content, with an average of approximately 14% of the total fatty acids in all three species. However, saturated fatty acids (SFA) were significantly higher in T. militaris (41%), whereas polyunsaturated fatty acids (PUFA) were significantly higher in L. undulata (46%). The ratio of n−3/n−6 fatty acids ranged from 1.1 in T. militaris to 1.4 in L. torquata, which is good for human health and comparable to other high value gastropods. The results indicate that T. militaris, L. undulata, and L. torquata provide a good source of essential elements such as zinc, selenium, and iron. At the location studied, toxic metals and metalloids were below safe recommended standards for human consumption. Overall, this study confirms the suitability of turban snails as a nutritional food for human consumption.

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Proximate composition, amino acid and fatty acid profiles of marine snail Rapana venosa meat, visceral mass and operculum

et al. 2017

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Nutrient composition of the marine snail (Hexaplex trunculus) from the Tunisian Mediterranean coasts

Abstract: This study suggests that H. trunculus is an important source of protein and essential amino acids. Furthermore, the snail lipidic fraction contains high proportions of polyunsaturated fatty acids benefical for human health.

Cited by 34 publications

References 34 publications

Bioaccumulation of trace metals in Hexaplex trunculus: spatial and temporal trends from 2004 to 2011 along the Tunisian coast

Bioaccumulation of trace metals in Hexaplex trunculus: spatial and temporal trends from 2004 to 2011 along the Tunisian coast

Investigation of nutritional properties of three species of marine turban snails for human consumption

Proximate composition, amino acid and fatty acid profiles of marine snail Rapana venosa meat, visceral mass and operculum

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