Biological Conservation and Stress

Hofer, Heribert; East, Marion L.

doi:10.1016/s0065-3454(08)60370-8

Cited by 92 publications

(65 citation statements)

References 392 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concentrations of glucocorticoids (corticosterone in birds) are often taken as a direct measurement of the allostatic demand an animal experiences [8]. In the laboratory, rats exposed to constant white light had both elevated baseline corticosterone concentrations and nonnormal, arrhythmic corticosterone release [9].…”

Section: Introductionmentioning

confidence: 99%

Stressful colours: corticosterone concentrations in a free-living songbird vary with the spectral composition of experimental illumination

et al. 2015

View full text Add to dashboard Cite

Organisms have evolved under natural daily light/dark cycles for millions of years. These cycles have been disturbed as night-time darkness is increasingly replaced by artificial illumination. Investigating the physiological consequences of free-living organisms in artificially lit environments is crucial to determine whether nocturnal lighting disrupts circadian rhythms, changes behaviour, reduces fitness and ultimately affects population numbers. We make use of a unique, large-scale network of replicated field sites which were experimentally illuminated at night using lampposts emanating either red, green, white or no light to test effect on stress hormone concentrations (corticosterone) in a songbird, the great tit (Parus major). Adults nesting in white-light transects had higher corticosterone concentrations than in the other treatments. We also found a significant interaction between distance to the closest lamppost and treatment type: individuals in red light had higher corticosterone levels when they nested closer to the lamppost than individuals nesting farther away, a decline not observed in the green or dark treatment. Individuals with high corticosterone levels had fewer fledglings, irrespective of treatment. These results show that artificial light can induce changes in individual hormonal phenotype. As these effects vary considerably with light spectrum, it opens the possibility to mitigate these effects by selecting street lighting of specific spectra.

show abstract

Section: Introductionmentioning

confidence: 99%

Stressful colours: corticosterone concentrations in a free-living songbird vary with the spectral composition of experimental illumination

et al. 2015

View full text Add to dashboard Cite

show abstract

“…If many physiological, endocrinological, and behavioral parameters are simultaneously measured, misinterpretation can be obviated to some extent (Clark et al, 1997). A potential indicator of animal welfare is the absence of stress (Hofer and East, 1998). Assessment of animal stress levels aids in welfare monitoring and improves our understanding of animal biology (Young and Hallford, 2013).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variations in immunoreactive cortisol and fecal immunoglobulin levels in Sichuan golden monkey (Rhinopithecus roxellana)

Huang¹,

Li²,

Wu³

et al. 2014

Turk J Zool

View full text Add to dashboard Cite

The Sichuan golden monkey is deserving of conservation and the welfare of this species is receiving increasing attention. However, it is difficult to identify physiological parameters for assessing its conservation status. In the present study, we employed noninvasive sampling methods and immunochemical assays to determine if measurements of cortisol and immunoglobulin in feces allowed monitoring of physiological status. The results indicated that the cortisol and immunoglobulin concentrations in feces could serve as biomarkers for monitoring stress and immune status, and that there was a relationship between stress and the immune response. A tendency toward seasonal fluctuation in immunoreactive cortisol and fecal immunoglobulin concentrations emerged, indicating that these indices could be useful tools for monitoring the welfare of the monkey and could be used in the field of wildlife research.

show abstract

“…A potential indicator of animal welfare is the absence of stress, but to date there is no standard definition of stress and no single biochemical assay system to measure stress. 18 Repeated administration of dexamethasone to mares in oestrus is associated with decreased uterine oedema, suppression of LH and a high rate of ovulation failure. 19 Egypt holds different horse breeds pure Arabian, several European breeds and native breeds.…”

Section: Introductionmentioning

confidence: 99%

Stress and its effects on horses reproduction

AboEl-Maaty

2011

Vet Sci Develop

View full text Add to dashboard Cite

A total of 90 mares and horses were subjected to blood sampling for determining the effect of management (farm), reproductive condition, sex, age, breed and month of the year during breeding on circulating levels of cortisol and sex hormones. Blood samples were collected from December to the following June from four farms. Blood sera underwent testosterone, estradiol, progesterone and cortisol assaying using ELISA kits. Cortisol levels were significantly low in lactating mares during their foal heat but significantly high levels were recorded in both repeat breeder mares and horses used for racing. High and significant testosterone and estradiol levels were recorded in both stallions used for breeding especially after semen collection and early pregnant mares. Similar testosterone levels were recorded in both early pregnant mares and racing horses but high levels were recorded in stallions. Estradiol was high in both early pregnant and mares with endometritis but the highest levels were observed in stallions. Horses held in private farms had high cortisol levels compared to those of governmental farms. In contrast to mares, horses had low cortisol and high estradiol levels. Cortisol levels were high from April to June (Spring and early summer) compared to its levels from December to March (Winter). Arab horses had low cortisol compared to native and imported foreign breeds. In conclusion, environmental condition, exercise, breed, management and the purpose of raising horses all are affecting its cortisol levels.

show abstract

Biological Conservation and Stress

Cited by 92 publications

References 392 publications

Stressful colours: corticosterone concentrations in a free-living songbird vary with the spectral composition of experimental illumination

Stressful colours: corticosterone concentrations in a free-living songbird vary with the spectral composition of experimental illumination

Seasonal variations in immunoreactive cortisol and fecal immunoglobulin levels in Sichuan golden monkey (Rhinopithecus roxellana)

Stress and its effects on horses reproduction

Contact Info

Product

Resources

About