Evaluation of physiological stress in Australian wildlife: Embracing pioneering and current knowledge as a guide to future research directions

Narayan, Edward

doi:10.1016/j.ygcen.2015.12.008

Cited by 21 publications

(17 citation statements)

References 92 publications

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“…It is not feasible to discuss all of those harms here. However, the harms associated with stressrelated pathologies deserve some comment as they are complex and are an area of active research for Australian species (Brearley et al 2013;Bradshaw 2015;Narayan 2015;Hing et al 2016;McAlpine et al 2017). Notably, physiological stress responses to human-modified landscapes have been documented for several Australian marsupials (Brearley et al 2012;Johnstone et al 2012b;Davies et al 2013;Hing et al 2014;Narayan and Williams 2016).…”

Section: Evaluating the Harm That Land Clearing Causesmentioning

confidence: 99%

The invisible harm: land clearing is an issue of animal welfare

Finn

Stephens

2017

Wildl. Res.

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Link to the published version of this paper: http://www.publish.csiro.au/WR/WR17018 If you require a copy for non-commercial purposes, you may request one from: h.finn@curtin. Link to the published version of this paper: http://www.publish.csiro.au/WR/WR17018 If you require a copy for non-commercial purposes, you may request one from: h.finn@curtin.edu.au 2 Abstract 27Land clearing is a significant environmental issue in Australia and an area of active

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Section: Evaluating the Harm That Land Clearing Causesmentioning

confidence: 99%

The invisible harm: land clearing is an issue of animal welfare

Finn

Stephens

2017

Wildl. Res.

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“…It may be that these responses affect future reproductive function related to polygyny, polyandry, and monogamy, and in turn sperm morphological characteristics. Further, bird species can be affected by heat stress 49. This might impair spermatogenesis by reducing testicular germ cell proliferation and increasing apoptosis 50.…”

Section: Sperm Size and Reproductive Function In Bird Speciesmentioning

confidence: 99%

Recent advances in bird sperm morphometric analysis and its role in male gamete characterization and reproduction technologies

Santiago-Moreno¹,

Esteso²,

Villaverde‐Morcillo³

et al. 2016

Asian J Androl

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Postcopulatory sexual selection through sperm competition may be an important evolutionary force affecting many reproductive traits, including sperm morphometrics. Environmental factors such as pollutants, pesticides, and climate change may affect different sperm traits, and thus reproduction, in sensitive bird species. Many sperm-handling processes used in assisted reproductive techniques may also affect the size of sperm cells. The accurately measured dimensions of sperm cell structures (especially the head) can thus be used as indicators of environmental influences, in improving our understanding of reproductive and evolutionary strategies, and for optimizing assisted reproductive techniques (e.g., sperm cryopreservation) for use with birds. Computer-assisted sperm morphometry analysis (CASA-Morph) provides an accurate and reliable method for assessing sperm morphometry, reducing the problem of subjectivity associated with human visual assessment. Computerized systems have been standardized for use with semen from different mammalian species. Avian spermatozoa, however, are filiform, limiting their analysis with such systems, which were developed to examine the approximately spherical heads of mammalian sperm cells. To help overcome this, the standardization of staining techniques to be used in computer-assessed light microscopical methods is a priority. The present review discusses these points and describes the sperm morphometric characteristics of several wild and domestic bird species.

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“…Cortisol (CORT) is another important hormone, generally used as stress marker also in wild animals [15], but the evaluation of its plasma concentrations is considered as poorly reliable since the hypothalamic-pituitary-adrenal axis is instantaneously activated upon stressful stimuli, such as restraint and blood sampling [16]. This is partially why, in the last years, alternative matrices for hormones' and other analytes' quantification have been proposed, including hair and feces, capable of providing different information regarding a longer timespan [17][18][19], also in red deer [20,21] and other frequently hunted ungulates [22]. For example, fecal CORT was proven to increase during late pregnancy with 10-year old females showing higher levels in comparison to five-year old hinds.…”

Section: Introductionmentioning

confidence: 99%

Progesterone and Cortisol Levels in Blood and Hair of Wild Pregnant Red Deer (Cervus Elaphus) Hinds

Ventrella

Elmi

Bertocchi

et al. 2020

Animals

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The red deer (Cervus elaphus L., 1758) is one of the largest deer species in the world. Females are seasonal polyestrous, with negative photoperiod: the increase of the night peak of melatonin determines the secretion of GnRH and, therefore, LH and FSH. To date there is little information regarding the hormonal control during pregnancy for this species; this could be due to the difficulty of sampling wild subjects, while farmed animals’ hormonal concentrations may not reflect the physiology of the animal in a natural state. In this study we evaluated the concentration of cortisol and progesterone, extracted from blood and hair, on 10 wild and pregnant red deer females. Belonging to the population of the Bolognese Apennines (Italy), the hinds were sampled in the January–March 2018 period, according to the regional selective hunting plan. Plasma progesterone (P4) ranged from a minimum of 1.9 to a maximum of 7.48 ng/mL; while hair P4 concentrations varied from 41.68 to 153.57 pg/mg. The plasma and hair cortisol ranges are respectively 0.4–2.97 ng/mL and 0.03–0.55 pg/mg; the only significant correlation was found between hair concentration of P4 and the date of death. The results of this preliminary study represent a small step towards a better knowledge of this species’ physiology during pregnancy.

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Evaluation of physiological stress in Australian wildlife: Embracing pioneering and current knowledge as a guide to future research directions

Cited by 21 publications

References 92 publications

The invisible harm: land clearing is an issue of animal welfare

The invisible harm: land clearing is an issue of animal welfare

Recent advances in bird sperm morphometric analysis and its role in male gamete characterization and reproduction technologies

Progesterone and Cortisol Levels in Blood and Hair of Wild Pregnant Red Deer (Cervus Elaphus) Hinds

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