Ecological Archives E089-025-A2

James E. Byers, April M. H. Blakeslee, Ernst Linder, Andrew B. Cooper, and Timothy J. Maguire. 2008. Controls of spatial variation in the prevalence of trematode parasites infecting a marine snail. Ecology 89:439–451.

Appendix B. Sampled intertidal sites: locations, sample sizes, and trematode prevalences.

Sites of sampled Littorina littorea populations from north to south with their latitude, longitude, total number of snails, individual trematode species occurrences (Cl = Cryptocotyle lingua, Cp = Cercaria parvicaudata, Rr = Renicola roscovita, Mp = Microphallus pygmaeus, Ms = Microphallus similis, Double (Cl and Cp) = double infection of Cryptocotyle lingua and Cercaria parvicaudata), and overall trematode prevalence. Sites highlighted in bold are at the Isles of Shoals.

Site

Latitude

Longitude

n

Trematode sp. occurrences

Overall prevalence

Cl

Cp

Rr

Mp

Ms

Double (Cl and Cp)

Prout's Neck, Maine

43º 31.65

70º 19.23

185

9

0

0

0

0

0

0.049

Wells National Estuarine Reserve, Maine

43º 20.07

70º 32.55

174

14

4

0

0

0

0

0.103

York Cliffs, Maine

43º 12.26

70º 35.41

164

5

0

0

0

0

0

0.030

York, Maine

43º 08.95

70º 37.40

167

2

1

1

0

0

1

0.030

Cedar Point, Great Bay, New Hampshire

43º 07.77

70º 51.12

163

5

1

1

0

0

0

0.043

Hilton Park, Great Bay, Durham, New Hampshire

43º 07.21

70º 49.63

157

3

0

0

0

0

0

0.019

Adams Point, Great Bay, New Hampshire

43º 05.38

70º 51.94

151

1

0

0

0

0

0

0.007

Kittery, Maine

43º 05.03

70º 42.70

169

10

0

0

0

0

0

0.059

Fort Stark, Newcastle, New Hampshire

43º 03.55

70º 42.77

167

4

1

0

0

0

0

0.030

Odiorne State Park, Rye, New Hampshire

43º 02.59

70º 42.65

178

20

1

0

0

0

0

0.118

Duck Island

43º 00.38

70º 36.16

203

52

6

1

0

0

0

0.291

Rye Harbor, New Hampshire

43º 00.22

70º 44.99

169

8

2

0

0

0

0

0.059

Larus Ledge, Appledore Island

42º 59.47

70º 37.07

190

88

2

0

0

0

0

0.474

Broad Cove, Appledore Island

42º 59.38

70º 36.75

194

13

1

0

0

0

0

0.072

Transect 5, Appledore Island

42º 59.35

70º 37.06

250

59

1

0

0

0

1

0.244

Appledore Ledges, Appledore Island

42º 59.09

70º 36.79

279

77

1

1

1

1

0

0.290

Smuttynose Island

42º 58.85

70º 36.46

205

63

0

0

0

0

0

0.307

Star Island

42º 58.70

70º 36.79

214

36

2

0

0

0

0

0.178

White Island

42º 58.12

70º 37.62

198

21

0

0

0

0

0

0.106

Hampton, New Hampshire

42º 55.32

70º 49.40

164

1

1

0

0

0

0

0.012

Plum Island, Massachussetts

42º 47.45

70°49.06

167

1

0

0

0

0

0

0.006

Gloucester, Massachussetts

42º 36.49

70º 40.58

178

15

2

0

0

0

0

0.096

Plymouth, Massachussetts

41º 57.85

70º 40.12

170

29

3

0

0

0

0

0.188

Monument Beach, Buzzard's Bay, Massachussetts

41º 42.20

70º 37.02

166

1

3

0

0

0

0

0.024

Vineyard Haven, Martha's Vineyard, Massachussetts

41º 27.52

70º 35.16

148

2

6

0

0

0

0

0.054

Oak Bluffs, Martha's Vineyard, Massachussetts

41º 25.94

70º 33.43

175

3

2

0

0

0

0

0.029

Point Judith, Rhode Island

41º 21.77

71º 28.83

178

7

6

0

0

0

0

0.073

Stonington, Connecticut

41º 19.66

71º 54.37

216

1

1

0

0

0

0

0.009



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