Survey of circulating retinol (Vitamin A) and tocopheral (Vitamin E) concentrations in nesting marine turtles

Although marine turtles are relatively well-studied endangered and threatened species, critical discontinuities exist in the literature regarding numerous significant blood values, especially those of free-ranging populations. Gaining a better understanding of marine turtle ecological physiology is an urgent priority, considering the impact such information could have on conservation management plans and population health assessments [Bolten and Bjorndal, 1992; Raphael et...

Routine dietary husbandry influences sensory evaluation in leopard tortoises (Stigomochelys pardalis)

Controlled sensory evaluations objectively assess physical and/or chemical characteristics that may influence food preference. Such evaluations are valuable to determine food properties that may encourage, or discourage food intake. Multiple factors influence animal behavior and subsequent choice. These must be strictly controlled so specific treatments can be considered in relative isolation. Six, subadult female leopard tortoises (Stigmochelys pardalis) participated in...

Pyramiding is not caused by excess calcium and/or phosphorus in young Red-eared sliders, Trachemys scripta elegans

Pyramiding, is a condition in which the scutes of the carapace of turtles become deformed and elevated, taking on a pyramid shape. Pyramiding is believed to be a nutritional problem, however its exact cause is unknown. Given that the turtle carapace is composed largely of bone, it was hypothesized that it may be caused by an imbalance in dietary calcium...

Evolution of diets for Herbivorous and Omnivorous Reptiles at the Philadelphia Zoo: From Mystery Toward Science

At the Philadelphia Zoo the diets for herbivorous and omnivorous reptiles evolved over a period of years. Prior to 1992. the diets had been formulated solely by the former curator. Analysis of the general salad fed to smaller species of herbivorous and omnivorous reptiles (Animal Nutritionist – N-2) indicated unbalanced levels of fat-soluble vitamins. In addition. one of the salad’s...