Physiological responses to temperature in the horned lizards <i>Phrynosoma cornutum</i> and <i>Phrynosoma douglassi</i>

TitlePhysiological responses to temperature in the horned lizards Phrynosoma cornutum and Phrynosoma douglassi
Publication TypeJournal Article
Year of Publication1971
AuthorsPrieto, Jr. AA, Whitford WG
Date Published1971
Call Number00451
Keywordsarticle, articles, journal, journals, lizard,physiology, lizard,thermoregulation, Phrynosoma, Phrynosoma,thermoregulation, reptile, Phrynosoma, reptile,horned lizard

In the laboratory, Phrynosoma cornutum and Phrynosoma douglassii from central New Mexico had mean preferred body temperatures of 38.5 C and 35 C respectively.... Differences in the oxygen pulse values of these species at high and low temperature extremes indicate differences in the cardiac output and efficiency. It is suggested that P. douglassii may have a more efficient transport of oxygen by the respiratory pigments at low temperatures than P. cornutum.