Fig 1.
Yellow perch life stage indices and relationships collected from Pelican Lake, Nebraska, USA from 2004 through 2013.
Fig 2.
Bluegill life stage indices and relationships collected from Pelican Lake, Nebraska, USA from 2004 through 2013.
Fig 3.
Yellow perch and bluegill earliest (left bracket), latest (right bracket), and peak (box) hatch dates (Julian dates) collected from Pelican Lake, Nebraska, USA from 2004 through 2012.
See methods for more details.
Fig 4.
An overview of hatching distributions for larval yellow perch collected from Pelican Lake, Nebraska, USA from 2004 through 2012.
Hatching distributions are presented as the percent of annual totals across Julian dates. Earliest and latest hatch dates are not always depicted due to very low representation compared to other dates (please reference Fig 3 for this information).
Fig 5.
An overview of hatching distributions for larval bluegill collected from Pelican Lake, Nebraska, USA from 2004 through 2012.
Hatching distributions are presented as the percent of annual totals across Julian dates. Earliest and latest hatch dates are not always depicted due to very low representation compared to other dates (please reference Fig 3 for this information).
Fig 6.
Conceptual model illustrating how hatching phenology affects recruitment dynamics across life stages for yellow perch and bluegill (developed from top AICc models–Tables 1 and 2).
Dots represent the start of hatching and arrow lengths represent duration of hatch. Top panels describe life stages with high recruitment variability and bottom panels describe the life stage where recruitment variability has diminished. White backgrounds indicate large abundances during these life stages whereas gray backgrounds indicate small abundances during these life stages.
Table 1.
Akaike’s information criterion rankings to explain larval and age-0 yellow perch abundance (indexed by CPUE) collected from Pelican Lake, Nebraska during 2004–2013.
Results include model coefficients for each variable (in parentheses), the number of parameters (K), Akaike information criterion corrected for smaller sample sizes (AICc), differences in AICc (Δi), weights (wi), and the proportion of variance explained (R2) for each model. Larval and age-0 life stage abundances were log10 + 1 transformed.
Table 2.
Akaike’s information criterion rankings to explain larval, age-0, and age-1 bluegill abundance (indexed by CPUE) collected from Pelican Lake, Nebraska during 2004–2013.
Results include model coefficients for each variable (in parentheses), the number of parameters (K), Akaike information criterion corrected for smaller sample sizes (AICc), differences in AICc (Δi), weights (wi), and the proportion of variance explained (R2) for each model. All life stage abundances and peak hatch dates were log10 + 1 transformed.