Table 3.

Critical thermal maxima and minima, total length and mass for northern and southern killifish acclimated to a 12 h: 12 h L:D photoperiod and constant temperatures for 21 days

Acc. temp. (°C)Total length (cm)Mass (g) CTMax (°C) CTMin (°C) CTMax (°C) corrected for: CTMin (°C) corrected for:
Population(N)(°C)(N)(°C)LengthMassLengthMass
2.3±0.47NH6.21±0.542.88±0.791528.6±1.0515−1.1±028.628.6−1.1−1.1
GA7.79±0.547.25±0.791530.8±1.4415−1.1±030.830.8−1.1−1.1
7.2±0.11NH6.18±0.542.76±0.771432.0±0.7315−1.1±032.032.0−1.1−1.1
GA7.38±0.955.13±1.921434.6±0.6515−1.1±034.634.6−1.1−1.1
12.4±0.24NH6.21±0.692.91±1.101533.6±0.8715−1.1±033.633.6−1.1−1.1
GA7.40±0.835.83±2.041534.9±0.9315−1.0±0.4135.035.0−1.0−1.0
22.4±0.35NH6.44±0.733.24±1.291538.2±0.45141.7±0.9038.238.21.81.8
GA7.76±0.927.08±2.731539.4±0.20152.9±0.7339.439.42.92.9
26.5±0.28NH5.11±0.913.04±1.281540.4±0.33153.8±0.3640.540.43.63.8
GA6.17±1.116.26±2.731341.4±0.33145.8±0.4141.341.45.85.8
32.1±0.44NH6.57±0.753.33±1.331441.8±0.29145.5±0.4941.741.85.55.5
GA7.82±0.877.13±2.231542.4±0.84157.7±0.4742.442.47.77.7
34.0±0.32NH6.63±0.603.43±1.141541.3±0.71128.6±0.4941.241.28.68.6
GA8.27±3.268.32±3.261542.5±0.96149.6±0.9042.642.69.69.6
  • Values are mean ± s.d.; N, number of fish; Acc. temp., acclimation temperature; NH, northern population; GA, southern population.