Fróðskaparrit - 31.12.2000, Page 141

Analyses of Mercury and Organochlorines
in Individual Marine Mammals from the
Faroe Islands
145
Kanningar av kyksilvri og organokloridum í einstøkum havsúgdjórum
í Føroyum
Maria Dam
Food and Environmental Agency, FO-IOO Tórshavn, Faroe Islands. Email: mariadam@hfs.fo
Úrtak
í alt vóru 14 congen av PCB ávíst, eins og seks isomer
av DDT, tríggir parlarar av toxaphene, fimm sløg av
chlordanum, 8-hexachlorohexane, hexachlorobenzene
og mirex. í alt vóru 100 grindahvalir (Globicephala
melas), 28 springarar (Lagenorhyncus acutus) og 30 lát-
urkópar (Halichoerus grypus) kannaðir hvør sær. Eisini
er kyksilvursinnihaldið víst í tvøsti av sama tali av djór-
um, og fyri springarar eru hesar kanningar gjørdar á
teimum somu einstaklingunum, sum vóru kannaðir fyri
persistent lívrunnin evni. Urslitini eru víst sum miðal-
virði fyri teir ymisku bólkamar av ungum og vaksnum
kall- og kvenndjórum, men eisini í myndum, har dálk-
ingarevnir eru víst sum funktión av kropslongd (hvalir)
ella aldur (kópar). Hægstu konsentratiónirnar av
persistentum lívrunnum evnum vóm ávíst í vaksnum
kalldjórum ella í ungdjórum. Innihaldið av kyksilvri var
hægst í fullvaksnum grindahvali. Hægsta innihaldið av
CB 153, 6.7 mg/kg fiti, varð funnið í brimlum. Hægsta
innihaldið av p,p’~DDE, 18.6 mg/kg fiti, varð funnið í
vaksnum springarahannum. Trans-nonachlor var tað
chlordanið, sum varð funnið í hægstu konsentratiónum,
og hægsta innihaldið av trans-nonachlor, 4.8 mg/kg fiti,
varð funnið í vaksnum springarahannum.
Abstract
In all, 14 congeners of PCB are reported as well as six
isomers of DDT, three parlars of toxaphene, five
representatives of the chlordane group of compounds, 8-
hexachlorohexane, hexachlorobenzene, and Mirex. In
all, 100 pilot whales (Globicephala melas), 28 white-
sided dolphins (Lagenorhyncus acutus), and 30 grey
seals (Halichoerus grypus) where analysed individual-
ly. The mercury concentration in muscle samples taken
from the same number of individuals of these three
species is provided also. In the case of the white-sided
dolphins, the muscle mercury analyses were done on the
same individuals as the persistent organic pollutants
(POPs) analyses. The results are given as mean values
for groups of juveniles and adult males and females, and
are also shown as pollutant concentration vs. individual
body length (odontocetes) or age (seal). The highest
concentrations of the persistent chlorinated organic
pollutants were found in adult males and juveniles. The
concentration of mercury was highest in the group of
adult male pilot whales. The highest concentration of
CB 153, 6.7 mg/kg lipid, was found in the adult male
group of grey seals. The highest concentration of p,p’-
DDE, 18.6 mg/kg lipid, was found in the white-sided
dolphin males. Trans-nonachlor was the dominant
chlordane compound and the group with the highest
trans-nonachlor concentration, equal to 4.8 mg/kg lipid,
was the adult males of the white-sided dolphins.
Fróðskaparrit 48. bók 2001: 145-174