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Table 2 Coefficients of between-species Spearman correlations in various years of the 1979–2013 period for the survival (at age of 0.3 to 0.8, 0.8 to 1.8, and over 1.8 year)

From: Is food supply for shellfish-eating birds in the western Wadden Sea affected by the between-species synchrony in year-to-year fluctuations of bivalve population parameters?

Age (years)

0.3–0.8

0.8–1.8

1.8+

CerastodermaMytilus

+ 0.21 (25)

− 0.05 (9)

− 0.29 (8)

CerastodermaMya

+ 0.34 (30)

− 0.10 (9)

− 0.10 (8)

CerastodermaLimecola

+ 0.15 (37)

+ 0.22 (21)

+ 0.14 (16)

MytilusMya

+ 0.36 (19)

− 0.54 (6)

− 0.62 (5)

MytilusLimecola

− 0.21 (22)

− 0.44 (11)

− 0.13 (15)

MyaLimecola

+ 0.20 (29)

+ 0.18 (10)

0.08 (15)

  1. The numbers of years (n) in each comparison is indicated between brackets, being the number of years in which the 2 species involved were sufficiently numerous (> 5 m−2 at the start of the period). There were no significant correlations