Optimal escape theory predicts escape behaviors beyond flight initiation distance: risk assessment and escape by striped plateau lizards Sceloporus virgatus

Pterin-based ornamental coloration predicts yolk antioxidant levels in female striped plateau lizards (Sceloporus virgatus).

1. Maternal investment in egg quality can have important consequences for offspring fitness. For example, yolk antioxidants can affect embryonic development as well as juvenile and adult phenotype. Thus, females may be selected to advertise their yolk antioxidant deposition to discriminatory males via ornamental signals, perhaps depending on the reproductive costs associated with signal product...

Striped plateau lizards (Sceloporus virgatus) do not exhibit behavioral syndromes in exploratory and anti-predator contexts

Morphometry of Growth in Hatchling Striped Plateau Lizards (Iguanidae: Sceloporus virgatus)

I studied the ontogenetic development of body shape and the influence of food availability on the development of body shape in hatchling striped plateau lizards (Sceloporus uirgatus) over the first seven to eight weeks of their life. Body mass showed positive growth relative to snout-vent length. Head width, head length, and femur length showed negative growth relative to snout-vent length. No ...

Increased mite parasitism as a cost of testosterone in male striped plateau lizards Sceloporus virgatus

1. Testosterone (T) co-ordinates the seasonal and sex-specific expression of numerous physiological, behavioural and morphological traits that contribute to male reproductive success. However, increased susceptibility to parasitism has been proposed as a potential cost of elevated plasma T. 2. During the spring breeding season, male striped plateau lizards Sceloporus virgatus harbour significan...

Simulation and perturbation analysis of escape oscillator

The dynamical behaviour of the forced escape oscillator, which depends on the parameter values we considered, have been studied numerically using the techniques of phase portraits and Poincar'{e} sections. Also, we employed perturbation methods such as Lindstedt's method to obtain the frequency-amplitude relation of escape oscillator.