The heart mitochondrial properties and the aerobic capacity (VO2max) of the rat (Sprague-Dawley breed) and the Cuban iguana (Cyclura nubila) were used to evaluate the relationship between the oxidative capacity of the heart and the maximum oxygen delivery rate. Both species are active at body temperatures of 37-39 degrees C, have similar heart mitochondrial volumes [Vmt; 0.43 +/- 0.02 ml (S.E.M...

Prey animals can reduce their risk of predation by detecting potential predators before encounters occur. Some animals gain information about nearby predators by eavesdropping on heterospecific alarm calls. Despite having well-developed ears, most lizards do not use vocal information for intraspecific communication, and few studies have shown practical use of the ears in wild lizards. Here, we ...

Meta-Object Protocols (MOPs) are an important aspect of object-oriented re ective programming. A number of C++ extensions have been implemented that include certain re ective features, however none of these provides a fully featured MOP. In this paper, we describe an extended version of C++ called Iguana that allows various features of the C++ language to be rei ed and their implementations (dy...

The amplitude of the b-wave of the electroretinogram (ERG) varies with a circadian rhythm in the green iguana; the amplitude is high during the day(or subjective day) and low during the night (or subjective night). Dopamine and melatonin contents in the eye are robustly rhythmic under constant conditions; dopamine levels are high during the subjective day, and melatonin levels are high during t...