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Table 2 Hyalella azteca—mean survival, weight, and reproduction

From: Chronic toxicity of tire and road wear particles to water- and sediment-dwelling organisms

Treatment Day 28 mean % survival (SD) Day 28 mean dry weight per organism (mg) (SD) Day 42 mean % survival (SD) Day 42 mean dry weight per organism (mg) (SD) Day 42 mean # young per female (SD)
Laboratory control 95 (12) 0.354 (0.021) 86 (20) 0.456 (0.069) 6.6 (2.8)
Reference sediment (unmixed) 96 (12) 0.366 (0.068) 89 (10) 0.422 (0.081) 2.8 (1.8)*
Reference sediment (mixed) 97 (6) 0.276 (0.007) 86 (16) 0.404 (0.031) 4.1 (0.8)*
TRWP spiked sediment 96 (5) 0.298 (0.050) 90 (12) 0.409 (0.063) 3.0 (1.4)*
  1. * Statistically significant decrease relative to lab control based on Tukey pairwise multiple comparison test (unmixed, p = 0.002; mixed, p = 0.049; TWP, p = 0.003)