keyword
MENU ▼
Read by QxMD icon Read
search

cheetah

keyword
https://www.readbyqxmd.com/read/28679462/analysis-of-zp1-gene-reveals-differences-in-zona-pellucida-composition-in-carnivores
#1
C Moros-Nicolás, A Leza, P Chevret, A Guillén-Martínez, L González-Brusi, F Boué, M Lopez-Bejar, J Ballesta, M Avilés, M J Izquierdo-Rico
The zona pellucida (ZP) is an extracellular envelope that surrounds mammalian oocytes. This coat participates in the interaction between gametes, induction of the acrosome reaction, block of polyspermy and protection of the oviductal embryo. Previous studies suggested that carnivore ZP was formed by three glycoproteins (ZP2, ZP3 and ZP4), with ZP1 being a pseudogene. However, a recent study in the cat found that all four proteins were expressed. In the present study, in silico and molecular analyses were performed in several carnivores to clarify the ZP composition in this order of mammals...
July 6, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28602789/age-associated-and-deslorelin-induced-declines-in-serum-anti-m%C3%A3-llerian-hormone-concentrations-in-female-cheetahs-acinonyx-jubatus
#2
Ned J Place, Adrienne E Crosier, Pierre Comizzoli, Jennifer B Nagashima, Holly Haefele, Anne Schmidt-Küntzel, Laurie L Marker
Anti-Müllerian hormone (AMH) is widely used in human medicine to non-invasively estimate the size of the ovarian follicle reserve and to predict the ovarian response to gonadotropin stimulation in the context of assisted reproductive technologies (e.g., IVF). These applications of AMH testing have recently expanded to non-human mammals, with production animals, such as cows, goats and sheep being the primary focus of AMH research. However, few investigations have involved exotic species, and in particular carnivores...
June 8, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28525778/inferior-vena-cava-collapsibility-detects-fluid-responsiveness-among-spontaneously-breathing-critically-ill-patients
#3
Keith A Corl, Naomi R George, Justin Romanoff, Andrew T Levinson, Darin B Chheng, Roland C Merchant, Mitchell M Levy, Anthony M Napoli
PURPOSE: Measurement of inferior vena cava collapsibility (cIVC) by point-of-care ultrasound (POCUS) has been proposed as a viable, non-invasive means of assessing fluid responsiveness. We aimed to determine the ability of cIVC to identify patients who will respond to additional intravenous fluid (IVF) administration among spontaneously breathing critically-ill patients. METHODS: Prospective observational trial of spontaneously breathing critically-ill patients...
May 12, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28475209/the-relationship-between-direct-predation-and-antipredator-responses-a-test-with-multiple-predators-and-multiple-prey
#4
Scott Creel, Egil Dröge, Jassiel M'soka, Daan Smit, Matt Becker, Dave Christianson, Paul Schuette
Most species adjust their behavior to reduce the likelihood of predation. Many experiments have shown that antipredator responses carry energetic costs that can affect growth, survival and reproduction, so that the total cost of predation depends on a trade-off between direct predation and risk effects. Despite these patterns, few field studies have examined the relationship between direct predation and the strength of antipredator responses, particularly for complete guilds of predators and prey. We used scan sampling in 344 observation periods over a four-year field study to examine behavioral responses to the immediate presence of predators for a complete antelope guild (dominated by wildebeest, zebra and oribi) in Liuwa Plains National Park, testing for differences in response to all large carnivores in the ecosystem (lions, spotted hyenas, cheetahs and African wild dogs)...
May 5, 2017: Ecology
https://www.readbyqxmd.com/read/28424462/dietary-behaviour-of-man-eating-lions-as-revealed-by-dental-microwear-textures
#5
Larisa R G DeSantis, Bruce D Patterson
Lions (Panthera leo) feed on diverse prey species, a range that is broadened by their cooperative hunting. Although humans are not typical prey, habitual man-eating by lions is well documented. Fathoming the motivations of the Tsavo and Mfuwe man-eaters (killed in 1898 in Kenya and 1991 in Zambia, respectively) may be elusive, but we can clarify aspects of their behaviour using dental microwear texture analysis. Specifically, we analysed the surface textures of lion teeth to assess whether these notorious man-eating lions scavenged carcasses during their depredations...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28363055/cardiorespiratory-effects-of-dexmedetomidine-butorphanol-midazolam-dbm-a-fully-reversible-anesthetic-protocol-in-captive-and-semi-free-ranging-cheetahs-acinonyx-jubatus
#6
A Margarita Woc Colburn, Suzan Murray, Lee-Ann C Hayek, Laurie Marker, Carlos R Sanchez
Multiple anesthesia protocols have been used in the cheetah ( Acinonyx jubatus ). Twenty healthy, captive cheetahs were immobilized with dexmedetomidine (15.8 ± 1.9 μg/kg), butorphanol (0.22 ± 0.03 mg/kg), and midazolam (0.18 ± 0.03 mg/kg) by intramuscular injection. Induction, recumbency, and recovery times were recorded, and physiologic parameters were monitored. Anesthesia was antagonized with atipamezole (0.125 ± 0.02 mg/kg) and naltrexone (0.1 ± 0.014 mg/kg) intramuscularly. All cheetahs were safely anesthetized with this protocol...
March 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28333126/cheetahs-have-a-stronger-constitutive-innate-immunity-than-leopards
#7
Sonja K Heinrich, Heribert Hofer, Alexandre Courtiol, Jörg Melzheimer, Martin Dehnhard, Gábor Á Czirják, Bettina Wachter
As a textbook case for the importance of genetics in conservation, absence of genetic variability at the major histocompatibility complex (MHC) is thought to endanger species viability, since it is considered crucial for pathogen resistance. An alternative view of the immune system inspired by life history theory posits that a strong response should evolve in other components of the immune system if there is little variation in the MHC. In contrast to the leopard (Panthera pardus), the cheetah (Acinonyx jubatus) has a relatively low genetic variability at the MHC, yet free-ranging cheetahs are healthy...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28325981/tracking-data-from-nine-free-roaming-cheetahs-acinonyx-jubatus-collared-in-the-thabazimbi-area-limpopo-province-south-africa
#8
Kelly Marnewick, Samantha Page-Nicholson, Lizanne Roxburgh, Michael J Somers
BACKGROUND: In partnership with the University of Pretoria, the Endangered Wildlife Trust's Carnivore Conservation Programme collared six male and three female free-roaming Cheetahs (Acinonyx jubatus) in the Thabazimbi area in Limpopo Province, South Africa. This study was undertaken to determine the spatial ecology of free-roaming Cheetahs that occur outside of formal protected areas on private ranchland, where they frequently come into conflict with, and are sometimes killed by, private landowners...
2017: Biodiversity Data Journal
https://www.readbyqxmd.com/read/28320259/levosimendan-for-hemodynamic-support-after-cardiac-surgery
#9
RANDOMIZED CONTROLLED TRIAL
Giovanni Landoni, Vladimir V Lomivorotov, Gabriele Alvaro, Rosetta Lobreglio, Antonio Pisano, Fabio Guarracino, Maria G Calabrò, Evgeny V Grigoryev, Valery V Likhvantsev, Marcello F Salgado-Filho, Alessandro Bianchi, Vadim V Pasyuga, Massimo Baiocchi, Federico Pappalardo, Fabrizio Monaco, Vladimir A Boboshko, Marat N Abubakirov, Bruno Amantea, Rosalba Lembo, Luca Brazzi, Luigi Verniero, Pietro Bertini, Anna M Scandroglio, Tiziana Bove, Alessandro Belletti, Maria G Michienzi, Dmitriy L Shukevich, Tatiana S Zabelina, Rinaldo Bellomo, Alberto Zangrillo
BACKGROUND: Acute left ventricular dysfunction is a major complication of cardiac surgery and is associated with increased mortality. Meta-analyses of small trials suggest that levosimendan may result in a higher rate of survival among patients undergoing cardiac surgery. METHODS: We conducted a multicenter, randomized, double-blind, placebo-controlled trial involving patients in whom perioperative hemodynamic support was indicated after cardiac surgery, according to prespecified criteria...
May 25, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28259021/gas-chromatography-mass-spectrometry-profiles-of-urinary-organic-acids-in-healthy-captive-cheetahs-acinonyx-jubatus
#10
Adrian Stephen Wolferstan Tordiffe, Mari van Reenen, Fred Reyers, Lodewyk Jacobus Mienie
In captivity, cheetahs (Acinonyx jubatus) frequently suffer from several unusual chronic diseases that rarely occur in their free-ranging counterparts. In order to develop a better understanding of their metabolism and health we documented the urine organic acids of 41 apparently healthy captive cheetahs, in an untargeted metabolomic study, using gas chromatography-mass spectrometry. A total of 339 organic acids were detected and annotated. Phenolic compounds, thought to be produced by the anaerobic fermentation of aromatic amino acids in the distal colon, as well as their corresponding glycine conjugates, were present in high concentrations...
April 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28166968/interspecies-somatic-cell-nuclear-transfer-in-asiatic-cheetah-using-nuclei-derived-from-post-mortem-frozen-tissue-in-absence-of-cryo-protectant-and-in%C3%A2-vitro-matured-domestic-cat-oocytes
#11
F Moulavi, S M Hosseini, N Tanhaie-Vash, S Ostadhosseini, S H Hosseini, M Hajinasrollah, M H Asghari, H Gourabi, A Shahverdi, A D Vosough, M H Nasr-Esfahani
Recent accomplishments in the field of somatic cell nuclear transfer (SCNT) hold tremendous promise to prevent rapid loss of animal genetic resources using ex situ conservation technology. Most of SCNT studies use viable cells for nuclear transfer into recipient oocytes. However, preparation of live cells in extreme circumstances, in which post-mortem material of endangered/rare animals is improperly retained frozen, is difficult, if not impossible. This study investigated the possibility of interspecies-SCNT (iSCNT) in Asiatic cheetah (Acinonyx jubatus venaticus), a critically endangered subspecies, using nuclei derived from frozen tissue in absence of cryo-protectant at -20 °C and in vitro matured domestic cat oocytes...
March 1, 2017: Theriogenology
https://www.readbyqxmd.com/read/28157864/laser-shocked-energetic-materials-with-metal-additives-evaluation-of-chemistry-and-detonation-performance
#12
Jennifer L Gottfried, Eric J Bukowski
A focused, nanosecond-pulsed laser has been used to ablate, atomize, ionize, and excite milligram quantities of metal-doped energetic materials that undergo exothermic reactions in the laser-induced plasma. The subsequent shock wave expansion in the air above the sample has been monitored using high-speed schlieren imaging in a recently developed technique, laser-induced air shock from energetic materials (LASEM). The method enables the estimation of detonation velocities based on the measured laser-induced air-shock velocities and has previously been demonstrated for organic military explosives...
January 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/28111069/mechanical-characterization-and-comparison-of-energy-storage-and-return-prostheses
#13
Stacey M Rigney, Anne Simmons, Lauren Kark
The suitability of finite element analysis (FEA) for standardizing the mechanical characterization of energy storage and return (ESAR) prostheses was investigated. A methodology consisting of both experimental and numerical analysis was proposed and trialed for the Vari-flex(®) Modular(TM), Flex-foot Cheetah and Cheetah Xtreme by Össur(®) and a 1E90 Sprinter by Ottobock(®). Gait analysis was conducted to determine suitable orientation angles for non-destructive testing (NDT) of the ESAR prostheses followed by a quasi-static inverse FEA procedure within COMSOL Multiphysics(®), where the NDT conditions were replicated to determine the homogenized material properties of the prostheses...
January 20, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28103269/wildlife-population-dynamics-in-human-dominated-landscapes-under-community-based-conservation-the-example-of-nakuru-wildlife-conservancy-kenya
#14
Joseph O Ogutu, Bernard Kuloba, Hans-Peter Piepho, Erustus Kanga
Wildlife conservation is facing numerous and mounting challenges on private and communal lands in Africa, including in Kenya. We analyze the population dynamics of 44 common wildlife species in relation to rainfall variation in the Nakuru Wildlife Conservancy (NWC), located in the Nakuru-Naivasha region of Kenya, based on ground total counts carried out twice each year from March 1996 to May 2015. Rainfall in the region was quasi-periodic with cycle periods dependent on the rainfall component and varying from 2...
2017: PloS One
https://www.readbyqxmd.com/read/28070283/spatial-and-temporal-avoidance-of-risk-within-a-large-carnivore-guild
#15
Egil Dröge, Scott Creel, Matthew S Becker, Jassiel M'soka
Within a large carnivore guild, subordinate competitors (African wild dog, Lycaon pictus, and cheetah, Acinonyx jubatus) might reduce the limiting effects of dominant competitors (lion, Panthera leo, and spotted hyena, Crocuta crocuta) by avoiding them in space, in time, or through patterns of prey selection. Understanding how these competitors cope with one other can inform strategies for their conservation. We tested how mechanisms of niche partitioning promote coexistence by quantifying patterns of prey selection and the use of space and time by all members of the large carnivore guild within Liuwa Plain National Park in western Zambia...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28069967/when-protected-areas-prove-insufficient-cheetah-and-protection-reliant-species
#16
Joshua R Ginsberg
No abstract text is available yet for this article.
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28031805/in-the-absence-of-a-landscape-of-fear-how-lions-hyenas-and-cheetahs-coexist
#17
Alexandra Swanson, Todd Arnold, Margaret Kosmala, James Forester, Craig Packer
Aggression by top predators can create a "landscape of fear" in which subordinate predators restrict their activity to low-risk areas or times of day. At large spatial or temporal scales, this can result in the costly loss of access to resources. However, fine-scale reactive avoidance may minimize the risk of aggressive encounters for subordinate predators while maintaining access to resources, thereby providing a mechanism for coexistence. We investigated fine-scale spatiotemporal avoidance in a guild of African predators characterized by intense interference competition...
December 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28028225/the-global-decline-of-cheetah-acinonyx-jubatus-and-what-it-means-for-conservation
#18
Sarah M Durant, Nicholas Mitchell, Rosemary Groom, Nathalie Pettorelli, Audrey Ipavec, Andrew P Jacobson, Rosie Woodroffe, Monika Böhm, Luke T B Hunter, Matthew S Becker, Femke Broekhuis, Sultana Bashir, Leah Andresen, Ortwin Aschenborn, Mohammed Beddiaf, Farid Belbachir, Amel Belbachir-Bazi, Ali Berbash, Iracelma Brandao de Matos Machado, Christine Breitenmoser, Monica Chege, Deon Cilliers, Harriet Davies-Mostert, Amy J Dickman, Fabiano Ezekiel, Mohammad S Farhadinia, Paul Funston, Philipp Henschel, Jane Horgan, Hans H de Iongh, Houman Jowkar, Rebecca Klein, Peter Andrew Lindsey, Laurie Marker, Kelly Marnewick, Joerg Melzheimer, Johnathan Merkle, Jassiel M'soka, Maurus Msuha, Helen O'Neill, Megan Parker, Gianetta Purchase, Samaila Sahailou, Yohanna Saidu, Abdoulkarim Samna, Anne Schmidt-Küntzel, Eda Selebatso, Etotépé A Sogbohossou, Alaaeldin Soultan, Emma Stone, Esther van der Meer, Rudie van Vuuren, Mary Wykstra, Kim Young-Overton
Establishing and maintaining protected areas (PAs) are key tools for biodiversity conservation. However, this approach is insufficient for many species, particularly those that are wide-ranging and sparse. The cheetah Acinonyx jubatus exemplifies such a species and faces extreme challenges to its survival. Here, we show that the global population is estimated at ∼7,100 individuals and confined to 9% of its historical distributional range. However, the majority of current range (77%) occurs outside of PAs, where the species faces multiple threats...
January 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28026881/intrinsic-factors-adrenal-gland-morphology-and-disease-burden-in-captive-cheetahs-acinonyx-jubatus-in-south-africa
#19
Nina Gillis-Germitsch, Pamela-Rose Vybiral, Daryl Codron, Marcus Clauss, Antoinette Kotze, Emily P Mitchell
Adrenal gland weight (AW) and corticomedullary ratio (ACMR) are used as indicators of stress in animals. Captive cheetahs (Acinonyx jubatus) have higher ACMRs than free-ranging ones and stress has been linked to gastritis, amyloidosis, glomerulosclerosis, and myocardial fibrosis. We reviewed age, sex, body weight (BW), kidney weight (KW), and left AW and ACMR with necropsy findings in 51 South African captive cheetahs. Eleven common histopathologic lesions were counted for each animal as measure of its disease burden...
January 2017: Zoo Biology
https://www.readbyqxmd.com/read/27992457/comparative-serum-fatty-acid-profiles-of-captive-and-free-ranging-cheetahs-acinonyx-jubatus-in-namibia
#20
COMPARATIVE STUDY
Adrian S W Tordiffe, Bettina Wachter, Sonja K Heinrich, Fred Reyers, Lodewyk J Mienie
Cheetahs (Acinonyx jubatus) are highly specialised large felids, currently listed as vulnerable on the IUCN red data list. In captivity, they are known to suffer from a range of chronic non-infectious diseases. Although low heterozygosity and the stress of captivity have been suggested as possible causal factors, recent studies have started to focus on the contribution of potential dietary factors in the pathogenesis of these diseases. Fatty acids are an important component of the diet, not only providing a source of metabolisable energy, but serving other important functions in hormone production, cellular signalling as well as providing structural components in biological membranes...
2016: PloS One
keyword
keyword
38512
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"