Heavy metals content of three marine fish species

Date

10-1995

Degree

Bachelor of Science in Agricultural Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Lilia S. P. Madamba

Abstract

Heavy metals are among the water pollutants that may be absorbed by fishes. For this study, the levels of heavy metals such as cadmium, copper, lead and zinc in round scad (Decapterus sp.), mullet (Solar cruminophthalmus), and long ;jawed anchovy (Stolephorus commersoni) from Lingayen Gulf and Tayabas Bay were analyzed by atomic absorption spectrophotometry.

Liver and kidney exhibited the highest level of heavy metals with mean concentration (wet basis) of 3.37 ppm Cu, 1.22 ppm Pb, 0.52 ppm Cd and 45.88 ppm Zn. Gills had lower concentration with stems values (wet basis) of 2.28 ppm Cu, 0.74 ppm Pb, 0.38 ppm Cd and 36.09 ppm Zn. The inedible tissue composed of head, tails, fins, bones and entrails showed a lesser mean concentration (wet basis) of 1.77 ppm, 0.64 ppm, 0.28 ppm and 22.43 ppm for Cu, Pb, Cd and Zn, respectively. Heavy metals are present in lowest level in the edible tissues which had mean concentration (wet basis) of 1.02 ppm, 0.17 ppm, 0.21 ppm and 12.32 ppm for Cu, Pb, Cd, and Zit respectively.

The concentrations of heavy metals were highest in onnivorous fish (round scad), less its herbivore (mullet) and least in carnivorous fish (long-jawed anchovy) except for zinc concentration where the highest was in mullet. The mean Cu concentration (wet basis) for all the tissues of round scud, mullet, and long-jawed anchovy are 2.44 ppm, 1.89 ppm and 0.61 ppm, respectively and 0 78 ppm, 0.61 ppm and 0.12 ppm for lead (Pb) concentration. The Zn concentrations are 29.89 ppm for mullet, 28.82 ppm for round semi and 10.92 ppm for long-jawed anchovy.However.no significant differences among fish sates were noted for cadmium

Generally, heavy metal concentrations were found to be higher in samples taken lions Lingayen Gulf than those from Tayabas Bay except for Zn concentration where species taken limn Tayabas Bay have higher level. The levels of heavy metals is the fish samples are still below the allowable maximum concentration set for safe human consumption

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1995 A13 M37

Document Type

Thesis

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