The influence of incubation temperature on offspring traits varies across northern and southern populations of the American alligator (<i>Alligator mississippiensis</i>).

Egg mass and survival Egg masses at the two southern populations (FLW: x̄ = 85.1, SE: 3.08; FLE: x̄ = 86.9, SE: 3.29) were greater relative to the two northern populations (SCW: x̄ = 74.9, SE: 3.31 and SCE: x̄ = 80.9, SE: 3.08), but only a nearly significant difference was observed between SCW and FLE ( β = −11.98, t = −2.57, p = .073; Figure 1b ).

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