Locomotor impairment of gravid lizards: is the burden physical or physiological?

By Olsson, Shine, Bak‐Olsson. 2000

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REPRODUCTION IN A TYPICAL CAPITAL BREEDER: COSTS, CURRENCIES, AND COMPLICATIONS IN THE ASPIC VIPER (2002, background): “The reality is far more complex: even if reproductive effort is high, its magnitude may not correlate with future reproductive output in simple phenotypic comparisons (Bauwens and Thoen 1981, Brodie 1989, Niewiarowski and Dunham 1994, Olsson et al. 2000).”
Loss of body mass under predation risk: cost of antipredatory behaviour or adaptive fit-for-escape? (2004, background): “However, this reproductive burden could be better related to physiological changes occurring during pregnancy than to the costs of carrying an extra load (as shown in the viviparous skink Niveoscincusmicrolepidotus; Olsson et al. 2000).”
Timing of locomotor impairment and shift in thermal preferences during gravidity in a viviparous lizard (2003, unknown): “Temporal variations in locomotor performances during gestation could originate from (1) gestation effects (Olsson et al. 2000), (2) seasonal variations in locomotor performances independently of gestation, (3) acclimation to laboratory conditions, or (4) training and fatigue effects (Garland et al.…”
Benefits and costs of parental care (2012, background): “In lizards and birds this effect seems to be mediated by muscle condition (e.g. Veasey et al. 2001; Olsson et al. 2000).”