engleski

Morphometric characteristics, condition factor and heavy metal concentrations of Atlantic chub mackerel (Scomber colias) from the Adriatic Sea

The aim of the study was to determine and describe morphometric characteristics, length– weight relationship, condition factor and heavy metal concentrations in the muscle tissue of Atlantic chub mackerel (Scomber colias) from the North Adriatic Sea. Sampling (n=100) was performed during November 2018 by a purse-seine net. Morphomeristics were obtained with graph paper and calliper for all sampled fish, while heavy metal concentrations were measured in digested fish muscles (n=10) by high resolution inductively coupled plasma mass spectrometry (HR ICP-MS, Element 2, Thermo Finnigan). The maximum ratio range of body proportion was noted in standard and fork length and the minimum was noted in proportion of body depth and fork length. Length–weight relationships of Scomber colias indicate positive allometry growth W=0.003 x L3.339 with condition factor values as noted CF = 0.88±0.08. Measured metals in fish muscle tissue showed the following concentration ranges: a) macro elements: K>Na>Mg>Ca (< 7 mg kg-1) ; b) essential trace metals/metalloids: Fe>Zn>Se>Cu>Mn (< 5 mg kg- 1), Ni (< 0.03 mg kg-1) ; c) nonessential metals/metalloids: As>Rb>Sr>Cs (< 5 mg kg-1), Cd>Tl>Ag>Sb (< 0.03 mg kg-1). Correlation among various metals and fish morphometry was not significant, so potential metal accumulation with fish growth was not confirmed. Average Cd levels in fish muscle (0.8 mg kg-1) did not exceed maximum permitted levels for Cd in foodstuffs (50 mg kg-1), pointing to safe human consumption of Atlantic chub mackerel from the North Adriatic Sea.

Scomber colias ; morphometric characteristics ; condition factor ; heavy metals ; North Adriatic Sea

nije evidentirano