Search results for: André Ganswindt

Items from 1 to 20 out of 37 results

article

Fence‐related mortalities of Temminck's pangolin (Smutsia temminckii) in South Africa quantified through a citizen science approach

Leandra Stracquadanio, Samuel Penny, André Ganswindt, Niall Burnside, more

African Journal of Ecology > 62 > 1 > n/a - n/a

Fence mortalities threaten Temminck's pangolin (Smutsia temminckii) in South Africa. Temminck's pangolins are bipedal, which leads to contact between their unprotected abdomens and electrified wires. We report findings of an online survey of landowners, managers and conservationists to investigate associations between mortalities, fence type and fence perimeter‐area ratio, and between mortalities...

article

Hyaenas play unique ecosystem role by recycling key nutrients in bones

Andrew J. Abraham, Andrea B. Webster, Jessica Jordaan, Tomos O. Prys‐Jones, more

African Journal of Ecology > 60 > 1 > 81 - 86

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Behavioural change during dispersal and its relationship to survival and reproduction in a cooperative breeder

Natasha D. Harrison, Nino Maag, Paul J. Haverkamp, André Ganswindt, more

Journal of Animal Ecology > 90 > 11 > 2637 - 2650

The ability of dispersing individuals to adjust their behaviour to changing conditions is instrumental in overcoming challenges and reducing dispersal costs, consequently increasing overall dispersal success. Understanding how dispersers' behaviour and physiology change during the dispersal process, and how they differ from resident individuals, can shed light on the mechanisms by which dispersers...

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Vaccination against GnRH as a prelude to surgical castration of horses

John R. Birrell, Martin L. Schulman, Alma E. Botha, André Ganswindt, more

Equine Veterinary Journal > 53 > 6 > 1141 - 1149

Background Surgical castration is one of the most frequently performed surgeries in horses and is associated with various post‐surgical complications ranging in severity. Objectives We investigated the effects of administering an anti‐GnRH vaccine to colts for reduction of testis size on the incidence of complications associated with their subsequent surgical castration. Study design Randomised...

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Unforeseen consequences of conservation management practices: case study on herding rhino as an anti‐poaching measure

María C. Fàbregas, Geoffrey T. Fosgate, André Ganswindt, Henk Bertschinger, more

Animal Conservation > 24 > 3 > 412 - 423

The current biodiversity crisis calls for effective conservation measures. However, some measures may have unforeseen negative consequences on individual species. Herding, a management practice currently used in some wildlife species to protect animals from poachers, can cause habituation to humans, which unintentionally might increase their risk of being poached at a later time. Herding could also...

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Sexual selection and endocrine profiles in wild South African giraffe (Giraffa camelopardalis giraffa)

Ciska P. J. Scheijen, Fred B. Bercovitch, Ilse Luther‐Binoir, Andre Ganswindt, more

African Journal of Ecology > 59 > 1 > 299 - 304

article

Decadal shift in foraging strategy of a migratory southern ocean predator

Gideon L. Berg, Els Vermeulen, Luciano O. Valenzuela, Martine Bérubé, more

Global Change Biology > 27 > 5 > 1052 - 1067

Rapid anthropogenic environmental change is expected to impact a host of ecological parameters in Southern Ocean ecosystems. Of critical concern are the consequences of these changes on the range of species that show fidelity to migratory destinations, as philopatry is hypothesized to help or hinder adaptation to climate change depending on the circumstances. Many baleen whales show philopatry to...

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Behavioral and adrenocortical responses of captive white rhino adolescents to the introduction of a new calf

María Cayetana Fàbregas, André Ganswindt, Geoffrey T. Fosgate, Henk J. Bertschinger, more

acta ethologica > 2019 > 22 > 3 > 227-231

Changes in group composition are not exclusive to zoos and conservation breeding centers. The recent increase in poaching of African rhino species has accelerated the arrival of orphan calves at rehabilitation centers. Introducing new members into an existing group is often stressful for many mammal species. However, when young animals are involved, such responses may be reduced or absent. The goal...

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Changes in prolactin, cortisol and testosterone concentrations during queen succession in a colony of naked mole-rats (Heterocephalus glaber): a case study

Katarina Medger, Nigel C. Bennett, Stefanie B. Ganswindt, Andre Ganswindt, more

The Science of Nature > 2019 > 106 > 5-6 > 1-7

Colonies of naked mole-rats (Heterocephalus glaber, NMRs) are characterised by an extreme skew in lifetime reproductive success with only one female and one to three male consorts in a colony. The rest of the individuals in a colony are reproductively suppressed and much research has been focussed on elucidating that mechanism. The dopamine system and prolactin have recently been implicated in the...

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Noninvasive measurements of ovarian activity in Beira antelope (Dorcatragus megalotis)

Tanja E. Wolf, Abdi Arif, Nigel C. Bennett, André Ganswindt

Reproduction in Domestic Animals > 54 > 2 > 275 - 279

As the natural habitat of more and more species becomes depleted, captive breeding programmes have become established to bring species back from the brink of extinction. Monitoring the reproductive status of an individual is essential in order to improve breeding success. Traditional methods have involved stressful blood sampling, and thus noninvasive methods have been proven to be reliable alternatives...

article

Detection of Simonsiella spp. in the Vagina of Lions and Leopard in Oestrus

Isabel Callealta, Andre Ganswindt, Sara Goncalves, Abraham Mathew, more

Reproduction in Domestic Animals > 53 > 6 > 1605 - 1608

Reports of the vaginal flora of wild cats such as lions or leopards are scarce. The micro‐organisms most commonly found in the vagina of clinically healthy cats are aerobic bacteria such as coagulase‐negative Staphylococcus, Streptococcus canis, and Escherichia coli. Simonsiella spp are large Gram‐negative bacteria belonging to the Neisseriaceae family, typically found in the oral cavity and upper...

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Faecal glucocorticoid metabolite monitoring as a measure of physiological stress in captive and wild vervet monkeys

Christopher Young, Andre Ganswindt, Richard McFarland, Charon de Villiers, more

General and Comparative Endocrinology > 2017 > 253 > C > 53-59

The development of non-invasive techniques to analyse physiological stress in mammalian species has revolutionised field-based endocrinology. However, careful validation of the methods used to determine faecal glucocorticoid metabolite (fGCM) and other hormone concentrations are required on a species- and sex-specific basis. In this study, we performed an adrenocorticotropic hormone (ACTH) stimulation...

article

Heart Rate Variability in Healthy, Adult Pony Mares During Transrectal Palpation of the Reproductive Tract by Veterinary Students

Elize van Vollenhoven, Lizelle Fletcher, Patrick Collin Page, André Ganswindt, more

Journal of Equine Veterinary Science > 2017 > 58 > C > 68-77

Few studies exist on evaluating stress in animals used for veterinary student training. The aim of this study was to (1) assess the stress response of habituated mares during student transrectal palpations of the reproductive tract; (2) determine the recovery period; and (3) evaluate the effect of the mares' experience and age on the stress response. Heart rate variability (HRV) was employed to quantify...

article

Effects of lions on behaviour and endocrine stress in plains zebras

Stéphanie Périquet, Peter Richardson, Elissa Z. Cameron, André Ganswindt, more

Ethology > 123 > 9 > 667 - 674

Living under predation risk may alter both behaviour and physiology of potential prey. In extreme cases, such alterations may have serious demographic consequences, and recent studies support that non‐lethal effects of predation may have broad ecological consequences. However, behavioural and physiological responses to predation risk may be related to trade‐offs associated with resource acquisition...

article

Non‐invasive assessment of adrenocortical function as a measure of stress in the endangered golden langur

Jatin Sarmah, Chaya R. Hazarika, Elizabeth V. Berkeley, Stefanie B. Ganswindt, more

Zoo Biology > 36 > 4 > 278 - 283

The golden langur (Trachypithecus geei) is an endangered primate endemic to northern India and Bhutan. The main stressors to the species are habitat degradation and fragmentation. Non‐invasive fecal glucocorticoid metabolite (fGCM) analysis is a powerful tool for assessing stress associated with environmental disturbances in wildlife. However, interspecific differences in glucocorticoid metabolism...

article

The effect of alphacypermethrin-treated mesh protection against African horse sickness virus vectors on jet stall microclimate, clinical variables and faecal glucocorticoid metabolites of horses

Patrick Page, Andre Ganswindt, Johan Schoeman, Gert Venter, more

BMC Veterinary Research > 2017 > 13 > 1 > 1-8

Background African horse sickness (AHS) is of importance to health and international trade in horses worldwide. During export from and transit through AHS endemic countries or zones, physical and chemical measures to protect horses from the vectors of AHS virus (AHSV) are recommended by the World Organization for Animal Health. Protection of containerized air transport systems for horses (jet stalls)...

article

Repeatability and Reliability of Heart Rate Variability in Healthy, Adult Pony Mares

Elize van Vollenhoven, Catharina Cornelia Grant, Lizelle Fletcher, André Ganswindt, more

Journal of Equine Veterinary Science > 2016 > 46 > Complete > 73-81

Heart rate variability (HRV) is an important noninvasive method to quantify stress by measuring sympathetic and parasympathetic activity of the autonomic nervous system. Few studies exist on the repeatability and reliability of HRV in equids. The objectives of this study were to (1) compare the effect of different correction factors (CF) available in HRV analysis software on HRV indicator values and...

article

Non-invasive assessment of adrenocortical activity as a measure of stress in giraffe (Giraffa camelopardalis)

Meredith J. Bashaw, Florian Sicks, Rupert Palme, Franz Schwarzenberger, more

BMC Veterinary Research > 2016 > 12 > 1 > 1-13

Background Numbers of giraffes are declining rapidly in their native habitat. As giraffe research and conservation efforts increase, the demand for more complete measures of the impact of conservation interventions and the effects of captive environments on animal health and welfare have risen. We compared the ability of six different enzyme immunoassays to quantify changes in fecal glucocorticoid...

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Female reproductive activity and its endocrine correlates in the African lesser bushbaby, Galago moholi

Juan Scheun, Julia Nowack, Nigel C. Bennett, Andre Ganswindt

Journal of Comparative Physiology B > 2016 > 186 > 2 > 255-264

Steroid hormones play an important role in female reproductive physiology and behaviour and are often used to monitor important female reproductive events. However, such studies are often attempted on captive populations alone, delivering limited data. One such example is the African lesser bushbaby, Galago moholi, for which contradicting observational data exist between captive and free-ranging populations,...

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Profiling patterns of fecal 20-oxopregnane concentrations during ovarian cycles in free-ranging southern white rhinoceros (Ceratotherium simum simum)

Annemieke Catharina van der Goot, Graeme Bruce Martin, Robert Peter Millar, Monique Christina Johanna Paris, more

Animal Reproduction Science > 2015 > 161 > Complete > 89-95

Unlike their wild counterparts, many white rhinoceros females in captivity fail to reproduce successfully such that current captive populations are not self-sustaining. The causes of the problem are poorly understood. Variation in cycle length and long periods of acyclicity are characteristics of the majority of these non-reproducing females in captivity but it is unknown whether these characteristics...

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INFONA - science communication portal

Search results for: André Ganswindt

Fence‐related mortalities of Temminck's pangolin (Smutsia temminckii) in South Africa quantified through a citizen science approach

Hyaenas play unique ecosystem role by recycling key nutrients in bones

Behavioural change during dispersal and its relationship to survival and reproduction in a cooperative breeder

Vaccination against GnRH as a prelude to surgical castration of horses

Unforeseen consequences of conservation management practices: case study on herding rhino as an anti‐poaching measure

Sexual selection and endocrine profiles in wild South African giraffe (Giraffa camelopardalis giraffa)

Decadal shift in foraging strategy of a migratory southern ocean predator

Behavioral and adrenocortical responses of captive white rhino adolescents to the introduction of a new calf

Changes in prolactin, cortisol and testosterone concentrations during queen succession in a colony of naked mole-rats (Heterocephalus glaber): a case study

Noninvasive measurements of ovarian activity in Beira antelope (Dorcatragus megalotis)

Detection of Simonsiella spp. in the Vagina of Lions and Leopard in Oestrus

Faecal glucocorticoid metabolite monitoring as a measure of physiological stress in captive and wild vervet monkeys

Heart Rate Variability in Healthy, Adult Pony Mares During Transrectal Palpation of the Reproductive Tract by Veterinary Students

Effects of lions on behaviour and endocrine stress in plains zebras

Non‐invasive assessment of adrenocortical function as a measure of stress in the endangered golden langur

The effect of alphacypermethrin-treated mesh protection against African horse sickness virus vectors on jet stall microclimate, clinical variables and faecal glucocorticoid metabolites of horses

Repeatability and Reliability of Heart Rate Variability in Healthy, Adult Pony Mares

Non-invasive assessment of adrenocortical activity as a measure of stress in giraffe (Giraffa camelopardalis)

Female reproductive activity and its endocrine correlates in the African lesser bushbaby, Galago moholi

Profiling patterns of fecal 20-oxopregnane concentrations during ovarian cycles in free-ranging southern white rhinoceros (Ceratotherium simum simum)

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