Table 1 Summary information for the sampled minnow Phoxinus phoxinus populations (11 native and 29 introduced; location number refers to Fig. 1). Location name, river name, sample size of minnow, number of minnows infected with Gyrodactylus spp., and infection intensity (summed number of Gyrodactylus spp.) in the population are given. Three measures of mean population specific genetic variability are also given: heterozygosity, gene diversity and allelic richness (with standard deviations)

Native

1*

Sørkedalselva

Lysaker

55

17

41

0.514 (0.115)

0.527 (0.370)

1.527 (0.355)

2*

Fallselva

Drammen

41

9

14

0.603 (0.093)

0.567 (0.386)

1.567 (0.356)

3*

Hunnselva

Glomma

45

11

19

0.578 (0.112)

0.585 (0.340)

1.585 (0.294)

4*

Elverum

Glomma

18

13

27

0.605 (0.156)

0.675 (0.356)

1.673 (0.291)

5*

Julussa

Glomma

10

10

28

0.532 (0.107)

0.604 (0.362)

1.600 (0.321)

6*

Søre Osa

Glomma

20

10

12

0.564 (0.132)

0.598 (0.356)

1.596 (0.312)

7*

Femunden

Trysil

22

8

11

0.536 (0.111)

0.618 (0.343)

1.616 (0.289)

8*

Sørli

Sørli

19

10

16

0.472 (0.103)

0.500 (0.351)

1.499 (0.327)

9*

Stuorajavri

Alta

21

10

35

0.621 (0.186)

0.592 (0.371)

1.590 (0.348)

10*

Tana

Tana

25

6

7

0.579 (0.161)

0.594 (0.348)

1.594 (0.302)

11

Asdøltjern

Lier

40

0

0

0.509 (0.120)

0.533 (0.369)

1.532 (0.342)

12

Sagelva

Åros

54

1

1

0.474 (0.114)

0.481 (0.369)

1.481 (0.351)

13

Fiskebekktjern

Trysil

20

0

0

0.525 (0.178)

0.582 (0.344)

1.580 (0.301)

14

Landsjøen

Trysil

17

0

0

0.503 (0.148)

0.564 (0.338)

1.561 (0.297)

Introduced

15*

Ørteren

Hallingdal

20

5

11

0.522 (0.092)

0.544 (0.367)

1.543 (0.336)

16*

Strandavatn

Hallingdal

33

14

32

0.575 (0.119)

0.566 (0.341)

1.566 (0.300)

17*

Stolsvatnet

Hallingdal

60

35

129

0.526 (0.118)

0.582 (0.330)

1.581 (0.282)

18*

Hustjern

Hallingdal

16

5

6

0.514 (0.123)

0.485 (0.355)

1.486 (0.334)

19*

Hallingsdalselva

Hallingdal

22

10

18

0.517 (0.090)

0.560 (0.379)

1.559 (0.348)

20*

Tisleia

Begna

40

15

36

0.567 (0.113)

0.577 (0.300)

1.578 (0.243)

21*

Bygdin

Vinstra

36

5

6

0.468 (0.120)

0.484 (0.340)

1.484 (0.315)

22*

Vinstri

Vinstra

28

18

20

0.545 (0.113)

0.576 (0.290)

1.575 (0.231)

23*

Vinstervatna Ø

Vinstra

122

11

14

0.599 (0.129)

0.606 (0.294)

1.606 (0.232)

24*

Birisjøen

Sjoa

21

10

12

0.632 (0.098)

0.555 (0.315)

1.557 (0.270)

25*

Otta

Otta

8

8

21

0.477 (0.118)

0.534 (0.371)

1.530 (0.342)

26

Mjåvatn

Tovdal

18

0

0

0.495 (0.148)

0.516 (0.332)

1.515 (0.299)

27

Totak

Skien

20

1

1

0.514 (0.090)

0.499 (0.385)

1.500 (0.367)

28

Møsvatn

Skien

17

0

0

0.381 (0.134)

0.489 (0.332)

1.477 (0.295)

20

Follsjå

Skien

15

0

0

0.409 (0.163)

0.453 (0.367)

1.449 (0.351)

30

Stigstuv

Numedal

52

0

0

0.515 (0.117)

0.536 (0.333)

1.536 (0.296)

31

Lægreid

Hallingdal

54

0

0

0.549 (0.111)

0.576 (0.346)

1.576 (0.303)

32

Tunhovd

Numedal

33

1

1

0.529 (0.098)

0.536 (0.379)

1.536 (0.353)

33

Kippesjøen

Etna

17

0

0

0.526 (0.134)

0.509 (0.357)

1.509 (0.343)

34

Heggefjorden

Begna

25

4

4

0.559 (0.135)

0.563 (0.338)

1.564 (0.297)

35

Vinstrervana V

Vinstra

44

0

0

0.545 (0.117)

0.586 (0.292)

1.585 (0.230)

36

Grovi

Otta

20

1

1

0.464 (0.065)

0.496 (0.418)

1.495 (0.405)

37

Jølstervatn

Jølster

38

0

0

0.501 (0.102)

0.505 (0.373)

1.505 (0.352)

38

Lesjaskogsvatn

Gubransdal

16

2

2

0.577 (0.102)

0.580 (0.323)

1.579 (0.273)

39

Glasåtjhern

Glomma

10

0

0

0.677 (0.115)

0.620 (0.365)

1.619 (0.315)

40

Essandsjøen

Nea

30

3

3

0.441 (0.128)

0.540 (0.391)

1.538 (0.365)

41

Risvatnet

Inna

20

0

0

0.409 (0.099)

0.442 (0.396)

1.441 (0.387)

42

Limingen

Namsen

20

0

0

0.595 (0.095)

0.586 (0.339)

1.586 (0.294)

43

Store Majavatn

Vefsna

16

0

0

0.419 (0.061)

0.421 (0.393)

1.422 (0.388)