Table 1. Measured guanylurea concentrations in medium and in tissue, mortality, biometric data, developmental and biochemical parameters of larval brown trout exposed to guanylurea.
All data are displayed as arithmetic means ± standard deviations. The heart rate was only evaluated for the negative control and the highest guanylurea concentration.
| Larval brown trout | ||||||
|---|---|---|---|---|---|---|
| Nominal water concentrations [µg/L] | 0 | 10 | 100 | 1000 | ||
| Measured (real) water concentrations | <LoQ | 9.0 ± 0.9 µg/L | 117.3 ± 5.3 µg/L | 1254 ± 33 µg/L | ||
| Internal concentration (average for 3 replicates) [ng/g] | <LoQ | <LoQ | <LoQ | 10.65 | ||
| Mortality [%] | 5.6 ± 1.6 | 2.2 ± 3.1 | 6.7 ± 2.7 | 3.3 ± 0.0 | ||
| Time to hatch (dpf) | 55.5 ± 3.0 | 56.8 ± 1.6 | 57.0 ± 1.1 | 56.2 ± 2.1 | ||
| Heart rate [bpm] | 59.2 ± 5.1 | n.e. | n.e. | 59.4 ± 4.3 | ||
| Body weight [g] | 0.50 ± 0.11 | 0.50 ± 0.14 | 0.51 ± 0.13 | 0.50 ± 0.12 | ||
| Body length [cm] | 3.8 ± 0.3 | 3.7 ± 0.3 | 3.8 ± 0.3 | 3.7 ± 0.3 | ||
| Condition factor [g/cm3] | 0.92 ± 0.10 | 0.94 ± 0.09 | 0.92 ± 0.11 | 0.99 ± 0.11 | ||
| Lipid peroxide level [CHP-equiv./mg wet weight] | 18.01 ± 5.57 | 16.97 ± 4.61 | 18.55 ± 7.14 | 19.48 ± 5.24 | ||
Notes.
- LoQ
- limit of quantification
- n.e.
- not evaluated
- bpm
- beats per minute
- dpf
- days post fertilisation