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Editor's choice article

Rainbow trout performance in food-limited environments: implications for future assessment and management

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Pages 159-170 | Received 08 Jul 2011, Accepted 12 Nov 2011, Published online: 01 Mar 2012

Figures & data

Table 1. Morphometry and chemical measures of biological productivity for First Bisby Lake (2002–2005).

Table 2. Spring and fall 2-year-old rainbow trout stocking information for First Bisby Lake (2002–2005).

Figure 1. Mean boat electrofishing CPUE (number of fish captured per hour) for each of four sampling periods for the four stocked cohorts of rainbow trout in First Bisby Lake, 2002–2006. The four sampling periods included Spring 1 (first spring after stocking), Fall 1 (first fall after stocking), Spring 2 (second spring after stocking), and Fall 2 (second fall after stocking). Error bars represent one standard error from the mean. Significant differences were found between seasons not sharing a common letter.

Figure 1. Mean boat electrofishing CPUE (number of fish captured per hour) for each of four sampling periods for the four stocked cohorts of rainbow trout in First Bisby Lake, 2002–2006. The four sampling periods included Spring 1 (first spring after stocking), Fall 1 (first fall after stocking), Spring 2 (second spring after stocking), and Fall 2 (second fall after stocking). Error bars represent one standard error from the mean. Significant differences were found between seasons not sharing a common letter.

Figure 2. Water content (%), Fulton's K, and relative weight of rainbow trout sampled from First Bisby Lake from May to October 2005. Spring data represent values at time of stocking. Horizontal lines on the boxes represent the upper quartile, median, and lower quartile, and the whiskers extend to data extremes. Significant differences were found between dates not sharing a common letter.

Figure 2. Water content (%), Fulton's K, and relative weight of rainbow trout sampled from First Bisby Lake from May to October 2005. Spring data represent values at time of stocking. Horizontal lines on the boxes represent the upper quartile, median, and lower quartile, and the whiskers extend to data extremes. Significant differences were found between dates not sharing a common letter.

Figure 3. Water content (%), Fulton's K, and relative weight for rainbow trout from the initial group, fed group, food-deprived group, and lake group treatments in the food-resource manipulation experiment. Horizontal lines on the boxes represent the upper quartile, median, and lower quartile, and the whiskers extend to data extremes. Significant differences were found between treatments not sharing a common letter.

Figure 3. Water content (%), Fulton's K, and relative weight for rainbow trout from the initial group, fed group, food-deprived group, and lake group treatments in the food-resource manipulation experiment. Horizontal lines on the boxes represent the upper quartile, median, and lower quartile, and the whiskers extend to data extremes. Significant differences were found between treatments not sharing a common letter.

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