Heavy metal content in farmed rainbow trout in relation to aquaculture area and feed pellets-Reference-Cited by-同舟云学术

Heavy metal content in farmed rainbow trout in relation to aquaculture area and feed pellets

Published:2019-10-31 Issue: Volume: Page:329-338
ISSN:2308-4057
Container-title:Foods and Raw Materials
language:en
Short-container-title:

Author:

Majlesi Majid¹,Malekzadeh Janmohammad¹,Berizi Enayat²,Toori Mehdi Akbartabar¹

Affiliation:

1. School of Health and Nutrition Sciences, Yasuj University of Medical Sciences

2. School of Nutrition and Food Sciences, Shiraz University of Medical Sciences

Abstract

Fish contamination by heavy metals, even at low levels, has an adverse effect on human health. Mercury (Hg), cadmium (Cd), and lead (Pb) are the most common heavy metals that contaminate sea foods. Rainbow trout is a fish species which is widely cultured in fresh water regions, e.g. in Yasuj, southwest of Iran. Heavy metal contamination was measured in three different culture areas (A, B, and C), with three different feed pellets used in Yasuj farms (I, II, and III). The sampling was conducted during February-April 2018 and the metals were measured using cold vapour atomic absorption with a Perkin Elmer 4100. The mean values of Hg, Cd, and Pb levels in the muscular tissue of the samples were 0.022, 0.105, and 1.07 mg/kg, respectively. Concentrations of Hg and Cd in edible tissues of rainbow trout were lower than the permitted values set by the WHO, the FDA, and the EC. The samples fed on mixture pellets III showed a significantly higher Hg content and a lower concentration of Cd in the muscle tissue compared to those given feed mixtures I and II (P < 0.05). Pearson correlation tests revealed significant correlations between the Cd and Pb concentrations and the weight of the fish samples (r = –0.519, r = –0.580). The lowest Cd concentration (0.076 mg/kg–1) was found in site A located close to the spring and not polluted by sewage from urban or rural areas. The study showed a correlation between the concentration of heavy metals in the fish samples and their weight, the degree of pollution, and the feeding mixture used in the farms.

Publisher

Kemerovo State University

Subject

Food Science

Link

http://jfrm.ru/files/archive/14/13.pdf

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