Skip to main content
Zoological Studies

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  
  1. Of Oncorhynchus mykiss (rainbow trout) from Nant y Fall (NyF) and Cabeza de Vaca (CVA) streams (Patagonia, Argentina) during the study period (early autumn, later winter, later spring of 2005, and later summer of 2006).
Back to article page