Fróðskaparrit - 01.07.2004, Síða 80

78
MERCURY IN LIVER, EGGS AND FEATHER OF BLACK GUILLEMOT
CEPPHUS GRYLLE FAEROENSISIN THE FARÓE ISLANDS
1.5
Mercury in body feather
y = 1.1032x-0.3717
R2 = 0.8482
2.5 3 3.5 4 4.5
Hg in contour feather from the back, mg/kg.
5.5
Figure 5. Mercury in body featherfrom black guillemots is given. The body feathers were taken from under one
wing andfrom the back between the wings of the birds. One bird with a very high mercury concentration (Cg-
0058) has been excludedfrom the figure. Modifiedfrom Olsen et al., 2003.
♦ Hestoy
■ Sveipur
I Linear (Sveipur)
y = 1.3211x- 1.3329
R2 = 0.7739
Fig. 7. Mercury concentration in black guillemot liver (in mg/kg dw) is seen u.v. that of feathers (in mg/kg). The
feather mercury concentration used is the mean of the measured concentration in the bodyfeathers under the wing
and body feathers from the back between the wings. A bird witli very high mercury concentration (Cg-0058) has
been excluded from the figure. The birds marked as Sveipur were taken at this site in June 1996 (4 adult females
and 3 juvenile males), the ones marked as Hestoy were taken there in August 1996 (2 adult males and 5 juveniles
both sexes). Modified from Olsen et al., 2003.
live birds. The results are given in Fig. 3 as
a plot of mercury concentration in feathers
under one wing and the concentration of
mercury in feathers from the back. In the
figure the outlier (Cg0058) has been ex-
cluded so as not to distort the regression co-
efficient, but a plot including this outlier
(not shown) has a similar equation for the
regression line, but then with y = 1,14x-
0,49.