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Lake and Reservoir Management Volume 30, 2014 - Issue 3
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Original Articles

Hypolimnetic oxygenation in Twin Lakes, WA. Part II: Feeding ecology of a mixed cold- and warmwater fish community

Megan M. SkinnerWashington State University, School of the Environment, PO Box 646410, Pullman, WA99164
,
Barry C. MooreWashington State University, School of the Environment, PO Box 646410, Pullman, WA99164Correspondence[email protected]
&
Mark E. SwansonWashington State University, School of the Environment, PO Box 646410, Pullman, WA99164
Pages 240-249 | Published online: 13 May 2014

Figures & data

Figure 1 Prey in >299 mm largemouth bass stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 1 Prey in >299 mm largemouth bass stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 2 Prey in 200–299 mm largemouth bass stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 2 Prey in 200–299 mm largemouth bass stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 3 Prey in 100–199 mm largemouth bass stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 3 Prey in 100–199 mm largemouth bass stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 4 Prey in golden shiner stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 4 Prey in golden shiner stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 5 Prey in brook trout stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 5 Prey in brook trout stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 6 Prey in rainbow trout stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 6 Prey in rainbow trout stomachs, expressed as percent by weight. Widths of hatched areas on the y-axis are proportional to percent weight. Top graphs are for 2005 in (a) North Twin Lake and (b) South Twin Lake; bottom graphs are for 2012 in (c) North Twin Lake and (d) South Twin Lake.
Figure 7 Schoener's Diet Overlap Index for brook trout and golden shiner diets between North Twin (NT) and South Twin (ST) lakes in (a) 2005 and (b) 2012 and for rainbow trout and golden shiner diets between NT and ST in (c) 2005 and (d) 2012. Diet overlap >60% is considered biologically significant and is represented by the horizontal dashed line.
Figure 7 Schoener's Diet Overlap Index for brook trout and golden shiner diets between North Twin (NT) and South Twin (ST) lakes in (a) 2005 and (b) 2012 and for rainbow trout and golden shiner diets between NT and ST in (c) 2005 and (d) 2012. Diet overlap >60% is considered biologically significant and is represented by the horizontal dashed line.

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