Infection with Borrelia afzelii and manipulation of the egg surface microbiota have no effect on the fitness of immature Ixodes ricinus ticks.

The log10-transformed engorged larval weight was a highly significant predictor of the log10-transformed unfed nymphal weight, and the former explained 72.7% of the variation in the latter (Fig. 4 ; regression: F 1, 651 = 1738, p < 0.000001; correlation: r = 0.854, t = 41.859, df = 652, p < 0.000001).

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