Fróðskaparrit - 31.12.2000, Blaðsíða 162

166
INDIVIDUAL ANALYSES OF MERCURY AND ORGANOCHLORINES
IN MARINE MAMMALS FORM THE FAROE ISLANDS
grey seals
□ males
■ females
age, yrs.
Fig. 10. The concentration of p.p'-DDE in grey seal blubber is plotted as afunction ofage. The 22-year-old male
with the highest p,p’-DDE concentration, 4,525 pg/kg lipid, is excluded in thefigure.
Mynd 10. Innihaldið av p,p’-DDE í láturkópaspiki er víst sum funktión av aldri. Tann 22 ára gamli brimilin við tí
hægsta p,p’-innihaldinum, tað sama sum 4525 pg/kg av feitti, er ikki við á myndini.
male with the lowest body burden was mea-
sured at 440 cm body length. The average
adult female body length in the material of
466 individuals was 430 cm.
Pesticides
The pesticides analysed were chlordanes,
B-HCH, Mirex, HCB (hexachlorobenzene),
DDT, and toxaphene. The chlordanes are a
class of cyclopentadiene compounds of
which the compounds cis (a)- and trans (y)
-chlordane and cis- and trans-nonachlor
were present in the original commercial
pesticide product, whereas oxychlordane is
the semi-degraded metabolite of these
(USEPA, 1998). B-HCH is present as an
impurity in the technical hexachloroben-
zene formulation, where the gamma isomer
(lindane) is the actual active ingredient
(Waxman, 1998). The organochlorine
compound Mirex has been used mainly on
the North American continent. In the US,
it has been used as a pesticide and in small-
er amounts in Canada as a flame retardant
(AMAP, 1998). Toxaphene is a mixture of
chlorinated bornanes and was the world’s
w s dolphins dnnnn
V) _ T3 □
Q " B □ „
□ males ■ females
jt i nnnn - 3° □ cPD □
30
E 0 - ■ ■ ° ° ■ ■ ■■ ■ n-m
1C 30 150 200 250 3C body length, cm
Fig. ll. The concentration of
p,p'-DDE, in pg/kg lipid, in
white-sided dolphin blubber is
plotted as afunction ofbody
length for males and females.
Mynd 11. Innihaldið av p,p'-
DDE í hvítskjórutum
springaraspiki er víst sum
funktión av kropslong á hann-
og honhvølum.