Table 2 Morphometric measurements annual mean and total range values, seasonal niche broad, and seasonal prey diversity
From: Selective foraging by non-native rainbow trout on invertebrates in Patagonian streams in Argentina
NyF ( n = 109) | CVA ( n = 60) | |||
|---|---|---|---|---|
Biological parameters | Mean ± SD | Range | Mean ± SD | Range |
Fish length (cm) | 11.1 ± 7.0 | 2.6 to 44.2 | 11.3 ± 4.2 | 5.2 to 9.6 |
Fish weight (g) | 44.6 ± 157.0 | 0.1 to 988.7 | 20.3 ± 21.2 | 1.6 to 84.7 |
Diet broad | Levin's index | |||
Early autumn | 0.032 | 0.263 | ||
Late winter | 0.247 | 0.169 | ||
Late spring | 0.331 | 0.588 | ||
Late summer | 0.037 | 0.332 | ||
Prey diversity | Shannon index | |||
Early autumn | 1.82 | 3.37 | ||
Late winter | 3.44 | 1.98 | ||
Late spring | 3.54 | 1.98 | ||
Late summer | 1.25 | 3.46 | ||