Effects of Restraint Stress on Circulating Corticosterone and Met Enkephalin in Chickens: Induction of Shifts in Insulin Secretion and Carbohydrate Metabolism
This study examined the effects of acute restraint stress in the presence or absence of naltrexone on the circulating concentrations of insulin, glucose, Met-enkephalin and corticosterone in 14-week-old chickens [design: 2 sex × 2 stress/non-stress × 2 +/- naltrexone]. In chickens (five male and five females per treatment) subjected to restraint for 30 min, there […]
Commonalities in Management and Husbandry Factors Important for Health and Welfare of Captive Elephants in North America and Thailand
This review paper is a synthesis of results from multiple studies that we have conducted over the past several years using similar methodologies to identify factors related to welfare of captive populations of elephants in North American zoos and Thailand tourist camps. Using multiple conservation physiology tools, we found that, despite vastly disparate management systems, […]
Glucose regulation in captive Pongo pygmaeus abeli, P. p. pygmaeus, andP. p. abeli x P. p. pygmaeus orangutans
Abstract 10.1002/1098-2361(2000)19:33.3.CO;2-D Intravenous glucose tolerance tests (IVGTT) were performed on 30 anesthetized, captive Sumatran (Pongo pygmaeus abeli), Bornean (P. p. pygmaeus), and hybrid (P. p. ablie x P. p. pygmaeus) orangutans, and fasted blood samples were taken from two additional juvenile orangutans in 11 U.S. zoos from 1989 to 1997. The age range of animals […]
Effects of comfort food on food intake, anxiety-like behavior and the stress response in rats
It has been suggested that access to high caloric food attenuates stress response. The present paper investigates whether access to commercial chow enriched with glucose and fat, here referred to as comfort food alters behavioral, metabolic, and hormonal parameters of rats submitted to three daily sessions of foot-shock stress. Food intake, anxiety-like behaviors, and serum […]
Chronic stress, energy balance and adiposity in female rats
Stress preferentially increases the consumption of high fat foods in women, suggesting the interaction of these two factors may disproportionately predispose women toward excess weight gain. In the present study, female rats were exposed to a chronic high fat or chow diet and were exposed to 4 weeks of chronic variable stress (CVS) or served […]
Chronic restricted access to food leading to undernutrition affects rat neuroendocrine status and olfactory-driven behaviors
Previous studies have demonstrated that olfactory-driven behaviors in rats are influenced by short-term caloric restriction, partly through the modulation of olfactory sensitivity by appetite-modulating hormones or peptides such as insulin and leptin. Here, we addressed the issue of a long-term modulation of their neuroendocrine status by evaluating the effect of chronic food restriction in rats […]
Metabolic health assessment of zoo elephants: Management factors predicting leptin levels and the glucose-to-insulin ratio and their associations with health parameters
Screening for metabolic-related health problems can enhance animal welfare, so the purpose of this study was to conduct the first metabolic health assessment of zoo elephants and use epidemiological methods to determine how factors in the captive environment were associated with metabolic hormone concentrations. In addition, we examined relationships between metabolic status and several fitness […]