Summary
Oxygen consumption and blood lactate concentration in the snakesColuber constrictor, Crotalus viridis, Lichanura roseofusca andMasticophis flagellum and whole body lactate concentration inCrotalus viridis andMasticophis flagellum were determined under standard conditions and after a bout of maximal activity induced by a 5 min period of mechanical stimulation. Observations were made atT b=35°C inColuber, Crotalus, andMasticophis and 32°C inLichanura. Maximal oxygen consumption inColuber andMasticophis was twice that ofCrotalus and 4 x that ofLichanura (Fig. 1). Post-active whole body lactate concentration inMasticophis was twice that ofCrotalus (Fig. 2). Immediately post-active and 30 min post-active blood lactate concentration inColuber andMasticophis was 1.5 x and 3.5 x that ofCrotalus andLichanura, respectively (Fig. 3). These data support conclusions that: (a) maximal energy production by these snakes correlates well with their respective modes of predation and defense, the highly active predatorsColuber andMasticophis being capable of the greatest net energy production during activity; (b)Coluber andMasticophis exhibit aerobic scopes as high or higher than any other comparably sized reptile heretofore investigated; (c) weight specific anaerobic metabolism probably does not decrease with increasing body size in reptiles; (d) anaerobic metabolism provides >50% of net energy production during five minutes of activity in all species examined (Table 1).
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Ruben, J.A. Aerobic and anaerobic metabolism during activity in snakes. J Comp Physiol B 109, 147–157 (1976). https://doi.org/10.1007/BF00689414
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DOI: https://doi.org/10.1007/BF00689414