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Table 2 Relative comparison of amphipod losses found after 3 h under experimental conditions without N. melanostomus presence

From: Synergistic impacts by an invasive amphipod and an invasive fish explain native gammarid extinction

 

Trial

Substratum

Mortality [%] mean (± SD)

N

G. pulex

D. villosus

A

Single

Presence

1.8 (±3.0)

1.2 (±2.5)

17

Mixed

Presence

1.3 (±2.7)

1.3 (±3.2)

24

Single

Absence

0.9 (±2.0)

1.0 (±2.2)

17

Mixed

Absence

0.3 (±1.3)

0.0 (±0.0)

29

B

Single

Presence

1.8 (±3.0)

1.7 (±2.1)

6

Mixed

Presence

0.7 (±1.8)

0.7 (±1.8)

16

Single

Absence

0.9 (±2.0)

1.3 (±1.4)

6

Mixed

Absence

2.5 (±4.1)

1.9 (±3.1)

15

  1. A G. pulex and D. villosus with the same size class, B D. villosus larger than G. pulex. Single only one species per aquarium, Mixed both species in aquarium