Fróðskaparrit - 31.12.2000, Page 157

KANNINGAR AV KYKSILVRI OG ORGANOKLORIDUM
I EINSTØKUM HAVSUGDJORUM I FØROYUM
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Fig. 5. The relative concentrations ofthe PCB congeners relative to that ofCB 153 are shownfor the three species
analysed.
Mynd 5. Tað lutfalsliga innihaldið av PCB-kongenunum í mun til CB 153 eru víst fyri tey trý sløgini, sum vórðu
kannað.
Table 16. Precision ofSum Chlordane results,
which were calculated as the sum of individually
quantified chlordanes a-chlordane, y-chlordane,
cis-nonachlor, trans-nonachlor, and oxychlordane.
Talva 16. Neyvleikin í sum-klordanúrslitunum eru
víst. Sum-klordanúrslitini vórðu roknað út sum
samløgan av teimum einstøku klordanunum.
# Ref. Sum Chlordane gg/kg lipid mean std. dev std. dev%
56F 656 40 6%
58M 7367 1020 14%
S8M 2730 19 1%
S14F 6774 55 1%
S21M 5375 350 7%
S37M 7698 269 3%
S66F 5325 342 6%
T27F 2530 51 2%
T49F 2536 46 2%
T104F 2202 32 1%
T115F 1295 48 4%
T126F 4586 44 1%
H14F 457 19 4%
H53F 668 65 10%
H68F 609 3 1%
All (n = 15) 4%
a factor 7 higher CB 153 concentration than
the adult female, whereas among pilot
whales the difference is approximately 3
(3.5 and 2.8 in the Sandavágur and Tór-
shavn 24 September 1997 pods, respective-
ly, Table 6).
The explanation for the differences
among the species studied may be sought in
the age differences within the groups. This
is best exemplified by comparing the juve-
nile group of seals to the juvenile group of
pilot whales wherein the former is com-
prised of almost entirely one- to three-year-
old individuals, and the latter includes
males of an age equivalent of 10 to 15 years
(up to 480 cm) (Bloch et al., 1993). With
the present material from white-sided dol-
phin, it is reasonable to assume that the rea-
son for the high difference between males
and females stems from the overall pres-
ence of older males, as indicated in the fig-
ures where Mirex is plotted as function of
body length (Fig. 8). Influences from oth-
er sources, however, are possible as cofac-