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Table 3 Mean lengths (mm) of E. directus in the North Sea

From: The fate of an immigrant: Ensis directus in the eastern German Bight

Literature

Study side

Years

1

2

3

4

Mühlenhardt-Siegel et al. (1983)

DK, Blåvandshuk-beach

48

109

137

152

D, Sylt

43

94

124

–

Swennen et al. (1985)

D, Langeness (intertidal)*

27–30

78–84

–

–

Dörjes (1992)

D, Großer Vogelsand**

10–50

60–105

–

–

Luczak et al. (1993)

F, Dunkerque***

35

–

–

–

Cadée et al. (1994)

NL, Sublittoral

59

120

134

–

Beukema and Dekker (1995)

NL, lower intertidal

64

126

144

–

Armonies and Reise (1999)

D, Sylt (intertidal)

43

97

127

133

This study

Amrumbank

35

88

129

149

Eiderstedt

40

70

–

138

Vogelsand

–

82+

92++

117+

  1. Table modified after Armonies and Reise (1999)
  2. * Range of average from three sites
  3. ** Range of average from three sites studied over 10 years, estimated from graph
  4. *** Age: ½ year
  5. +Age: 2 ½ and 4 ½ years respectively
  6. ++Age: 3 ¼ years
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Helgoland Marine Research

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