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 TypeThesis
Year of Publication1967
AuthorsPrieto, Jr. AA
Number of Pages25
Date Published1967
UniversityNew Mexico State University
CityLas Cruces, New Mexico
Thesis TypeM.S. Thesispp
Call Number00261
Keywordsdissertation, dissertations, lizard,physiology, lizard,thermoregulation, Phrynosoma, Phrynosoma,thermoregulation, reptile, Phrynosoma, reptile,horned lizard, theses, thesis
AbstractPhysiological responses to temperature were studied in Phyrnosoma cornutum and P. douglassi.... The results of these studies indicate that the wide range of distribution of P. douglassi is in part due to its wide zone of thermo-mobility and low CTMin as compared to P. cornutum. Differences in the oxygen pulse values of the two species at two temperature extremes differences in the cardiac output and efficiency. P. douglassi may have a more efficient mechanism for the transport of oxygen by the respiratory pigments of the blood at low temperatures than P. cornutum.