| derivation of sperm from xenografted testis cells and tissues of the peccary (tayassu tajacu). | because the collared peccary (tayassu tajacu) has a peculiar leydig cell cytoarchitecture, this species represents a unique mammalian model for investigating testis function. taking advantage of the well-established and very useful testis xenograft technique, in the present study, testis tissue and testis cell suspensions from immature collared peccaries (n=4; 3 months old) were xenografted in scid mice (n=48) and evaluated at 2, 4, 6, and 8 months after grafting. complete spermatogenesis was ob ... | 2014 | 24324205 |
| ungulate biomass in relation to feeding strategy within amazonian forests. | the relationship between diet and biomass was examined in the amazonian ungulates (red brocket deer, grey brocket deer, collared peccary, white-lipped peccary, and lowland tapir) of northeastern peru. tropical forest ungulates have lower biomasses than savanna or grassland ungulates, because in tropical forests the majority of primary production occurs in the canopy, well out of reach from terrestrial herbivores. within the amazonian ungulates, species that supplement their diet with animal mate ... | 1989 | 28312652 |
| seasonal variation in serum testosterone, testicular measurements and semen characteristics in the collared peccary (tayassu tajacu). | blood samples and testicular measurements were obtained from 4-8 captive adult collared peccaries monthly for 18 months and from wild adult males during summer (n = 16) and winter (n = 22) seasons. serum concentrations of testosterone were determined by radioimmunoassay. semen samples were collected monthly by electroejaculation from captive males for 1 year. serum testosterone concentrations and testicular measurements varied in a low-amplitude circannual pattern, with maximum mean testosterone ... | 1989 | 2704003 |
| urea concentration in collared peccary milk as an indicator of protein nutritional status. | milk urea nitrogen (un) concentration was examined as a possible index to protein-energy intake in female collared peccaries (tayassu tajacu). captive adults were bred and assigned to one of four experimental diets through gestation and lactation. females fed a high protein diet produced milk with un concentrations exceeding those of low-protein-fed females. a low energy intake tended to elevate un concentrations in milk. | 1987 | 3625919 |
| histology of palate and soft palate tonsil of collared peccary (tayassu tajacu). | peccaries are characterized by a prominent skin gland, known as scent gland, which is located in the middle of the rump. these animals are able to survive in a great variety of habitats, from humid tropical forests to semi-arid areas. they are omnivorous animals, and their diet includes fibrous material, vegetables, fruits, small vertebrates and insects. collared peccary hard palate and soft palate tonsils were studied, macroscopic morphometric data were collected and tissue samples were paraffi ... | 2014 | 24033496 |
| first postpartum estrus and pregnancy in the female collared peccary (tayassu tajacu) from the amazon. | the onset of sexual cycle postpartum was described in the collared peccary (tayassu tajacu). serum progesterone and 17beta-estradiol profiles, vaginal smears and external genitalia were analyzed in 20 animals housed with their piglets during the first postpartum month. the appearance of external genitalia showed no variation in any of the females: a shallow, reddish vulva, and vaginal mucus were constant features throughout the study. based on hormonal profiles and vaginal smear cell patterns, 1 ... | 2006 | 16837033 |
| ovarian features of the wild collared peccary (tayassu tajacu) from the northeastern peruvian amazon. | in this study, the ovaries of 27 wild collared peccaries (tayassu tajacu) from the amazonian region of northeastern peru were examined macroscopically and microscopically, and expression of major steroidogenic enzymes was detected by immunohistochemistry. our observations suggest a mean ovulation rate of 2.3 +/- 0.6 follicles and a low rate of reproductive wastage (0.4 +/- 0.6 oocytes or embryos per pregnancy). the collared peccary seems to exhibit follicular waves involving the synchronous grow ... | 2006 | 16516212 |
| ovarian folliculogenesis in collared peccary, pecari tajacu (artiodactyla: tayassuidae). | the sustainability and production of collared peccary (pecari tajacu) has been studied in the last few years; however, further information on its reproduction is necessary for breeding systems success. understanding folliculogenesis aspects will contribute to effective reproductive biotechniques, which are useful in the preservation and production of wildlife. the aim of this study was-to evaluate the ovarian folliculogenesis in collared peccary. ovaries from six adult females of collared peccar ... | 2012 | 22458237 |
| the spermatogonial stem cell niche in the collared peccary (tayassu tajacu). | in the seminiferous epithelium, spermatogonial stem cells (sscs) are located in a particular environment called the "niche" that is controlled by the basement membrane, key testis somatic cells, and factors originating from the vascular network. however, the role of leydig cells (lcs) as a niche component is not yet clearly elucidated. recent studies showed that peccaries (tayassu tajacu) present a peculiar lc cytoarchitecture in which these cells are located around the seminiferous tubule lobes ... | 2012 | 22262689 |
| abdominal exploration in captive collared peccaries (tayassu tajacu) by ultrasonography. | this study determines the morphology and ultrasound features of the abdominal organs in male, nestling and healthy collared peccaries. the bladder wall is hyperechogenic, with a thickness of 0.2 ± 0.08 cm. the kidneys present a well-defined cortex, medulla and pelvis, and the dimensions are 2.56 ± 0.3 × 4.6 ± 0.8 cm for the left and 2.51 ± 0.4 × 4.86 ± 1.1 cm for the right kidney. the spleen has a uniform echotexture over its entire surface. the largest dimensions of the liver are 2.0 ± 0.57 cm ... | 2012 | 22220558 |
| sem and neurohistological observations of nerve endings in the middle region of the tongue of the collared peccary (tayassu tajacu): a silver impregnation method. | the presence of lingual papillae and the nerve endings in the middle region of the tongue mucosa of collared peccary (tayassu tajacu) were studied using scanning electron microscopy and light microscopy, based upon the silver impregnation method. the middle region of tongue mucosa revealed numerous filiform and fungiform papillae. the thick epithelial layer showed epithelial cells and a dense connective tissue layer containing nerve fibre bundles and capillaries. the sensory nerve endings, inten ... | 2011 | 21138465 |
| volatile components in dorsal gland secretions of the collared peccary,tayassu tajacu (tayassuidae, mammalia). | secretions of the dorsal gland of free-ranging adult male and female collared peccaries (tayassu tajacu) were analyzed by gas chromatography-mass spectrometry. both sexes contain (2e,6e,10e)-geranylgeraniol; squalene (alle isomer); and the following isomers of springene, a diterpene homolog of β-farnesene: (3e,6e,10e)-α-springene, (3z,6e,10e)-α-springene, and (6e,10e)-β-springene. a diterpene alcohol and an additional isomer each of squalene and springene also were observed. straight- and branch ... | 1996 | 24226086 |
| validation of a fecal glucocorticoid metabolite assay for collared peccaries (pecari tajacu). | the possibility of assessing endogenous adrenal activity in the collared peccary (pecari tajacu) was tested by using an adrenocorticotropic hormone (acth) challenge in a fecal glucocorticoid metabolite (fgm) assay. feces were collected from 12 captive adult male peccaries beginning 48 hr prior to challenge; six of these animals received the challenge as an acth injection and the other six were injected with saline solution. feces collection ended 120 hr after injections. as a control, feces were ... | 2012 | 22779230 |
| influence of digestive morphology on resource partitioning in amazonian ungulates. | resource partitioning of diet and habitat use was studied in the entire amazonian ungulate community of northeastern peru, which comprises the red brocket deer (mazama americana), grey brocket deer (m. gouazoubira), collared peccary (tayassu tajacu), white-lipped peccary (t. pecari), and lowland tapir (tapirus terrestris). each ungulate species partitioned at least one type of resource from every other species. digestive morphology had a greater influence on resource partitioning of diet than bo ... | 1991 | 28312040 |
| natural habitat, housing, and restraint of six selected neotropical animals in trinidad and tobago with the potential for domestication. | this paper highlights the natural habitat, housing, and restraint needs of 6 neotropical animals that are found in trinidad and tobago with the potential for domestication: agouti (dasyprocta leporina), lappe/paca (cuniculus paca/agouti paca), capybara (hydrochoerus hydrochaeris), manicou/opossum (didelphis marsupialis insularis), collared peccary (tayassu tajacu/pecari tajacu), and red brocket deer (mazama americana). the year of the earliest reference cited was 1950 and the most recent was 201 ... | 2020 | 32300488 |
| endoparasites of selected native non-domesticated mammals in the neotropics (new world tropics). | in this review, information was summarized on endoparasites found in six non-domesticated neotropical animals. these mammals have the potential to be domesticated. the animals included three rodents, agouti (dasyprocta leporina), lappe (agouti paca), and capybara (hydrochoerus hydrochaeris); a marsupial, manicou (didelphis marsupialis insularis); and an artiodactyl, the collared peccary (tayassu tajacu/peccari tajacu) and a ruminant (the red brocket deer, mazama americana). while there are many ... | 2019 | 31671585 |
| nutrition of six selected neo-tropical mammals in trinidad and tobago with the potential for domestication. | this review highlights the available literature on the nutrition of six neo-tropical animals with the potential for domestication-the agouti (dasyprocta leporina/d. aguti), lappe (agouti paca), capybara (hydrochoerus hydrochaeris), manicou/opossum (didelphis marsupialis insularis), collared peccary (peccary tajucu) and the red brokcet deer (mazama americana). over 100 references were used, spanning over 100 years. the earliest being 1915 and the most recent being 2018. the references used in thi ... | 2018 | 29757965 |
| a review on trichinella infection in south america. | trichinella spp. causes human trichinellosis by means of the consumption of raw or inadequately treated meat from domestic or game animals. in the americas, as well as in other continents, trichinella infection is a health issue for humans and has a negative impact on the pork meat market, generated by people's fear of becoming infected with the parasite. the distribution of human cases and the sources of this disease in humans and animals were analysed in this report, which summarizes the infor ... | 2020 | 32949838 |
| progesterone and estradiol-17β as a potential method for pregnancy diagnosis in the collared peccary (pecari tajacu). | in this study, the period of pregnancy of nine collared peccary females has been monitored through the analysis of serum progesterone and estradiol-17β profiles. serum concentrations of progesterone increased by day 4 after conception, reaching concentrations of 33.4±5.6 ng/ml on day 10. between days 10 and 130 progesterone values were maintained between 20 and 60 ng/ml. in the collared peccary, embryonic estradiol synthesis is first observed in the systemic circulation by day 15 of pregnancy. b ... | 2012 | 22546524 |
| anatomicohistological characteristics of the tubular genital organs of the female collared peccary (tayassu tajacu) from north-eastern amazon. | the present study examines anatomical and histological characteristics of tubular genital organs and its relationships with the reproductive state of 24 wild adult collared peccary (tayassu tajacu) females. the tunica mucosa of the uterine tube presents a pseudostratified, intermittently ciliated columnar epithelium. the epithelial secretory cells of pregnant females and females in the luteal phase of the oestrous cycle became taller than the ciliated cells and showed abundant apical secretory b ... | 2004 | 15027946 |
| histological organization of collared peccary (tayassu tajacu) lip. | collared peccary (tayassu tajacu) belongs to the tayassuidae family that is characterized by a dorsal scent gland located in the middle of the hump. it can be found from south-west united states to argentina. it is a very well-adapted animal that can survive different environments, having a varied diet. very little morphological information of the animal is available, except that concerning the reproductive tract. this study describes the histological organization of the collared peccary lip. th ... | 2007 | 17535351 |
| hepatitis e virus (hev) infection in captive white-collared peccaries (pecari tajacu) from uruguay. | hepatitis e virus (hev) infection is a major cause of acute hepatitis worldwide. clinical presentation of hepatitis e mainly occurs as an acute and self-limited disease, though chronic cases are now being commonly reported in immunocompromised individuals. in high-income developed areas and non-endemic regions, hev is mainly transmitted by the zoonotic route through direct contact with infected animals or by consumption of contaminated meat products. although pigs and wild boars are the main res ... | 2020 | 32799421 |
| retrospective characterization of reproductive tract lesions in relation to age, parity, and contraception in captive suidae and tayassuidae. | reproductive management in zoos requires contraception or physical separation of sexes to ensure captive population viability, but information is sparse on the effects of parity, age, and contraceptive use on lifetime reproductive health in captive suidae and tayassuidae species. this retrospective study evaluated reproductive tissues and histories from babirusa (babyrousa babyrussa), red river hog (potamochoerus porcus), visayan warty pig (sus cebifrons), common warthog (phacochoerus africanus) ... | 2019 | 30690318 |
| environmental effects on collared peccaries (pecari tajacu) serum testosterone, testicular morphology, and semen quality in the caatinga biome. | the objective of the study was to understand the influence of climatic variations in a semiarid environment on serum testosterone, testicular morphology and semen quality in collared peccaries (pecari tajacu). reproductive metrics (semen quality, testicular morphometry and testosterone serum profiles) of 10 mature males were measured monthly for 18 months. meteorological data (rainfall, air temperature, relative humidity, wind speed and radiant heat load) also were recorded during the same perio ... | 2019 | 30597387 |
| cryopreservation of collared peccary (pecari tajacu l., 1758) epididymal sperm using extenders based on tris and powdered coconut water (acp®-116c). | summarythe aim of this study was to establish a functional freezing-thawing protocol for epididymal sperm of collared peccaries (pecari tajacu l., 1758) by comparing different extenders. the epididymal sperm from 12 sexually mature males was recovered by retrograde flushing using tris-based or coconut water-based (acp®-116c) extenders. after initial evaluation, samples were diluted and frozen with the same extenders to which 20% egg yolk and 6% glycerol were added. after 2 weeks, thawing was per ... | 2018 | 30220256 |
| neospora caninum-specific antibodies in free-ranging white-lipped peccaries ( tayassu pecari) from the peruvian amazon: detection of antibodies in serum and evaluation of indirect fluorescent antibody test with heterologous secondary antibody. | neospora caninum is a coccidian parasite originally reported in dogs and widely prevalent in numerous species of wild and domestic animals and has as definitive hosts some species of canids. the white-lipped peccary (wlp) ( tayassu pecari) is a tayassuidae mammal, found from mexico to south of brazil and north of argentina. it is a game species with great economic importance in the peruvian amazon. blood samples from 101 wlps were collected from near or within three different conservation reserv ... | 2018 | 30212339 |
| collared peccary (pecari tajacu) are susceptible to porcine reproductive and respiratory syndrome virus (prrsv). | collared peccary (pecari tajacu) and pigs (sus scrofa) are two members of superfamily suoidea that coexist in the americas and share some of the same viral infections. although porcine reproductive and respiratory syndrome virus (prrsv) is among the most impactful pathogens of swine on a worldwide basis, the susceptibility of peccaries to prrsv has not been investigated. in this study, three peccaries were intramuscularly inoculated with a prrsv-2 field virus. one prrsv-inoculated pig served as ... | 2018 | 29964321 |
| serologic survey for selected viral and bacterial swine pathogens in colombian collared peccaries ( pecari tajacu) and feral pigs ( sus scrofa). | in south america, wild populations of peccaries coexist with domestic and feral pigs, with poorly understood consequences. we captured 58 collared peccaries ( pecari tajacu) and 15 feral pigs ( sus scrofa) in locations of colombia where coexistence of these species is known. blood samples were tested for antibodies against four viral agents, classical swine fever virus (csfv), aujeszky's disease virus (adv), porcine circovirus (pcv-2), and vesicular stomatitis virus (new jersey and indiana subty ... | 2018 | 29902129 |
| reproductive performance of captive collared peccaries (tayassu tajacu) in the eastern amazon. | this study analyses reproductive parameters resulting from 74 parturitions in a population of captive collared peccaries in the eastern amazon (belém, state of pará, brazil) during a 65-month survey. parturitions were homogeneously distributed throughout the year. the average litter size was 1.85 newborns per parturition. collared peccary females had a newborn sex ratio of 52.6% females and 47.4% males. the mean age at first parturition was 639, although, the earliest first parturition occurred ... | 2007 | 17101243 |
| phylogenetic divisions among collared peccaries (pecari tajacu) detected using mitochondrial and nuclear sequences. | the collared peccary (pecari tajacu) is one of the three extant recognised species of the family tayassuidae, living in the americas. to understand phylogenetic relationships among collared peccaries, the entire mitochondrial dna control region and cytochrome b as well as partial nuclear gpip and pre-1 p27, pre-1 p642 and tyr sequences from specimens from colombia, argentina, bolivia, mexico, united states and australian zoo animals of unknown origin were analysed. separate and combined analyses ... | 2006 | 16837218 |
| serum estradiol-17beta, vaginal cytology and vulval appearance as predictors of estrus cyclicity in the female collared peccary (tayassu tajacu) from the eastern amazon region. | this report describes the characteristics of estrus in the female collared peccary (tayassu tajacu) from the eastern amazon. two consecutive experiments were performed. the objective of the first experiment was to assess the efficacy of estrus diagnosis by serum estradiol-17beta measurements, vaginal cytology and vulval appearance. the second experiment was designed to evaluate the effectiveness of these features for predicting the period of mating acceptance. in experiment 1, we monitored 56 pr ... | 2007 | 16500049 |
| macroscopic and microscopic aspects of collared peccary and white-lipped peccary placenta. | this study examines middle and late gestational placentae from 13 tayassu tajacu (collared peccary) and 3 tayassu pecari (white-lipped peccary), which are artiodactyla belonging to the family tayassuidae. the chorionic sac of tayassu species is diffuse and chorioallantoic. these epitheliochorial placentae show no trophoblast invasion into the uterine epithelium and there is interdigitation between fetal and maternal microvilli. two distinct regions of the fetomaternal interface can be identified ... | 2006 | 16338470 |
| integrating ultrasonography within the reproductive management of the collared peccary (tayassu tajacu). | ultrasound imaging has been used to elucidate certain aspects of the reproductive biology of wild or endangered species. however, to our knowledge, this tool has not been used for reproductive monitoring of the collared peccary (tayassu tajacu). in this study, real-time ultrasonography was used in 16 collared peccary females to diagnose early pregnancy status and predict gestational age. based on the detection of an embryo, the earliest pregnancy diagnosis was made on day 18 after mating, with t ... | 2005 | 15823342 |
| effect of centrifugation and sugar supplementation on the semen cryopreservation of captive collared peccaries (tayassu tajacu). | the present study is aimed at evaluating the effect of centrifugation for seminal plasma removal and the supplementation of fructose or glucose to the tris-based extender on the kinematic patterns of the motility parameters of frozen-thawed semen obtained from captive collared peccaries (tayassu tajacu). semen samples (n = 14) were collected from 10 sexually mature male collared peccaries by electroejaculation. these samples were further evaluated for parameters such as motility, vigor, sperm vi ... | 2010 | 20858475 |
| influence of the thawing rate on the cryopreservation of semen from collared peccaries (tayassu tajacu) using tris-based extenders. | the objective was to evaluate the influence of the thawing rate on the quality of frozen-thawed (cryopreserved in tris-based extenders) semen obtained from collared peccaries (tayassu tajacu). semen from 13 sexually mature collared peccaries males were collected by electroejaculation, and evaluated for motility, vigor, sperm viability, membrane integrity, and sperm morphology. semen was divided in two equal portions: the first was diluted in tris-fructose and the other in tris-glucose, with egg ... | 2010 | 20580079 |
| fate of native and introduced seeds consumed by captive white-lipped and collared peccaries (tayassu pecari, link 1795 and pecari tajacu, linnaeus 1758) in the atlantic rainforest, brazil. | we studied the role of white-lipped and collared peccaries (tayassu pecari and pecari tajacu) as seed predators and dispersers in the atlantic rainforest of brazil. the atlantic rainforest ecosystem is highly threatened and has experienced dramatic declines in its populations of large mammals. local extinctions can disrupt essential plant-animal interactions such as seed dispersion and seed predation. we tracked seeds from time of consumption to germination to assess the direct impact peccaries ... | 2010 | 20231959 |
| quantifying male-biased dispersal among social groups in the collared peccary (pecari tajacu) using analyses based on mtdna variation. | recent advances in the statistical analysis of microsatellite data permit calculation of sex-specific dispersal rates through sex- and age-specific comparisons of genetic variation. this approach, developed for the analysis of data derived from co-dominant autosomal markers, should be applicable to a sex-specific marker such as mitochondrial dna. to test this premise, we amplified a 449 bp control region dna sequence from the mitochondrial genome of the collared peccary (pecari tajacu), and esti ... | 2010 | 19639005 |
| evaluation of anesthetic protocol for the collection of semen from captive collared peccaries (tayassu tajacu) by electroejaculation. | the objective of this study is to verify and compare the effects of acepromazine-tiletamine-zolazepam and propofol used in anesthetic protocols for semen collection by electroejaculation from captive collared peccaries. ten sexually mature animals were physically restrained and anesthetized by either intravenous administration of tiletamine-zolazepam (2mg/kg) after acepromazine premedication, or a propofol dose of 5mg/kg. the onset of anesthetic recovery was determined by the animals regaining c ... | 2009 | 19327920 |
| chromosome comparison between populations of the collared peccary, tayassu tajacu, raised in captivity. | the collared peccary (tayassu tajacu) is widely distributed over the american continent, being found from the south of the usa to the north of argentina. in brazil, it is spread all over the country, being one of the potential species to be raised in captivity. therefore, the cytogenetic techniques could be a potential tool for reproductive monitoring of animals raised in captivity, mainly when destined for commercial purposes. this study had the objective of determining the chromosome number of ... | 2008 | 18825915 |
| comparative cardiovascular measurements in the javelina (tayassu tajacu). | | 1969 | 4240123 |
| effectiveness of panama as an intercontinental land bridge for large mammals. | habitat fragmentation is a primary driver of wildlife loss, and establishment of biological corridors is a common strategy to mitigate this problem. a flagship example is the mesoamerican biological corridor (mbc), which aims to connect protected forest areas between mexico and panama to allow dispersal and gene flow of forest organisms. because forests across central america have continued to degrade, the functioning of the mbc has been questioned, but reliable estimates of species occurrence w ... | 2020 | 31385631 |
| individual differences in behavior affect total tract fiber digestibility: the example of collared peccary. | differences in how individuals cope with stressful conditions (e.g. novel/unfamiliar environment, social isolation and increases in human contact) can explain the variability in data collection from nutrient digestibility trials. we used the collared peccary (pecari tajacu), which is under process of domestication and shows high individual behavioral distinctiveness in reactions toward humans, to test the hypothesis that behavioral differences play a role in nutrient digestibility. we assessed t ... | 2020 | 32594953 |
| identification of mycobacterium species and rhodococcus equi in peccary lymph nodes. | mycobacterium species and the virulence-associated proteins (vapa, vapb, and vapn genes) of rhodococcus equi isolated from 330 lymph nodes of collared peccaries (tayassu tajacu) and white-lipped peccaries (tayassu pecari) intended for human consumption were investigated. thirty-six (10.9%) r. equi strains were isolated; 3.3% (n = 11/330) were from white-lipped peccary lymph nodes, and 7.6% (25/330) were from collared peccary lymph nodes. among the 11 isolates of r. equi from the white-lipped pec ... | 2018 | 29546549 |
| molecular identification of bartonella bacilliformis in ticks collected from two species of wild mammals in madre de dios: peru. | to study the presence of bartonella bacilliformis in ticks collected from two wild mammals in madre de dios, peru. | 2018 | 29941013 |
| a preliminary study investigating the impact of musical concerts on the behavior of captive fiordland penguins (eudyptes pachyrhynchus) and collared peccaries (pecari tajacu). | captive animal welfare is important for establishments that exhibit species for education, conservation, and research. however, captive animals are often exposed to a number of potential stressors, such as visitors and anthropogenic noise. we aimed to identify the impact of a concert series on the behaviour of fiordland penguins (eudyptes pachyrhynchus; n = 2), and solitary- (n = 1) or group- (n = 4)-housed collared peccaries (pecari tajacu). animal behaviour, visitor density, and visitor behavi ... | 2020 | 33158195 |
| absolute and allometric relationships between internal morphology and body mass in the adult collared peccary, tayassu tajacu (tayassuidae). | selected morphological features of 8 adult male and 8 adult female collared peccaries (tayassu tajacu) shot from southern texas during march 1983 are described. a total of 16 adult peccaries with an average body mass of 18.68 +/- 0.61 (se) kg was examined. significant differences between males and females were observed for absolute and relative mass of liver and lungs, and relative heart mass. these visceral organs were heavier among females than males. significant sex effects were also found fo ... | 1986 | 3803989 |
| relationships between internal morphology and body mass in the developing, nursling collared peccary, tayassu tajacu (tayassuidae). | morphological characteristics that reflect size differences due to dietary conditions are in wide use to assess nutritional status of many wild ungulates. this study was designed to provide baseline information on the development of internal visceral and endocrine structures of nursling collared peccaries (tayassu tajacu) from birth to six weeks of age (weaning). a high energy-high protein ration was fed ad libitum to lactating females, and absolute and relative mass of selected visceral organ, ... | 1985 | 4007576 |
| unraveling the nomenclatural puzzle of the collared and white-lipped peccaries (mammalia, cetartiodactyla, tayassuidae). | the nomenclatural history of the collared and white-lipped peccaries, two well-recognized taxonomic entities, has been confusing. from the 18th century to the beginning of the 20th century, several genera were created, most of them without an explicit designation of type species. due to differing opinions as to whether the two species should be included in a single genus or, if separate genera were recognized, which generic name should be applied to each of the two taxa, the validity of generic ... | 2020 | 33056737 |
| physiological responses of the adult male collared peccary, tayassu tajacu (tayassuidae), to severe dietary restriction. | metabolic and hormonal responses of eight adult male collared peccaries (tayassu tajacu) to an ad libitum diet intake, or 25% of an ad libitum intake, were examined. blood samples for hematological, serum-biochemical and hormonal profiles were collected at three week intervals during the nine week experiment starting 4 august 1983. males fed on the restricted diet lost an average of 26% of their body weight during the trial, compared to a slight weight gain for those fed ad libitum. characterist ... | 1985 | 2864211 |
| cyclopia, congenital limb deformity, and osteomyelitis in the collared peccary, tayassu tajacu (l.). | | 1984 | 6530730 |
| techniques for collecting blood from collared peccaries, dicotyles tajacu (l.). | four methods are described for obtaining blood samples from the collared peccary. this animal lacks prominent superficial veins which makes the procedure of taking blood difficult for inexperienced persons. large volumes of blood (greater than 20 ml) can be obtained easily via anterior vena cava venipuncture. moderate amounts of blood (less than 20 ml) can be obtained from the orbital sinus. lesser volumes of blood can be obtained from superficial veins located on the ear and the hind limb. the ... | 1984 | 6716561 |
| histological and immunocytochemical observation of the hindstomach of the collared peccary, dicotyles tayacu (tayassuidae). | | 1983 | 6140322 |
| hormone levels and corpora lutea cell characteristics during gestation in the collared peccary. | | 1976 | 945082 |
| seasonal effects of temperature on the respiratory metabolism of the collared peccary (tayassu tajacu). | | 1975 | 234346 |
| ganglion cells and displaced amacrine cells density in the retina of the collared peccary (pecari tajacu). | in the present study, we investigated the topographical distribution of ganglion cells and displaced amacrine cells in the retina of the collared peccary (pecari tajacu), a diurnal neotropical mammal of the suborder suina (order artiodactyla) widely distributed across central and mainly south america. retinas were prepared and processed following the nissl staining method. the number and distribution of retinal ganglion cells and displaced amacrine cells were determined in six flat-mounted retin ... | 2020 | 33002017 |
| a novel betacoronavirus characterised in collared peccaries from the rio de janeiro zoo (brazil) killed by unknown disease. | in an enclosure with nine collared peccaries (pecari tajacu) from the rio de janeiro city zoo, brazil, one specimen was found dead and two others developed prostration, apathy and dehydration, resulting on its death. necropsy of two animals pointed to pulmonary and renal damage. histological examination revealed vasculitis in spleen from both p. tajacu, suggesting a systemic viral infection. lungs from one specimen showed fibrinoid vasculitis, alveolar damage with hyaline membrane, and interstit ... | 2020 | 32785421 |
| isolation, characterization, and cryopreservation of collared peccary skin-derived fibroblast cell lines. | biobanking of cell lines is a promising tool of support for wildlife conservation. in particular, the ability to preserve fibroblast cell lines derived from collared peccaries is of significance as these wild mammals are unique to the americas and play a large role in maintaining the ecosystem. we identified collared peccary fibroblasts by immunofluorescence and evaluated their morphology, growth and adherence capacity. further, we monitored the viability and metabolic activity of the fibroblast ... | 2020 | 32547858 |
| bmp-15 activity on in vitro development of collared peccary (pecari tajacu linnaeus, 1758) preantral follicles. | this study investigated the effects of bmp-15 on the in vitro development of preantral follicles of collared peccaries. ovarian fragments were cultured for 1 or 6 days in tissue culture medium 199 (tcm199+ ) supplemented with bmp-15 at rates of 0, 1, 25 or 50 ng/ml. the fragments were analysed histologically by evaluating follicular morphology, activation and growth as well as the potential for proliferation of granulosa cells. our results show the addition of 25 ng/ml bmp-15 in the medium provi ... | 2020 | 32473042 |
| composition of semen and foreskin mucosa aerobic microbiota and its impact on sperm parameters of captive collared peccaries (pecari tajacu). | to evaluate the bacterial composition of collared peccary semen and foreskin mucosa, and to verify the sensitivity of isolates to antimicrobials used in semen conservation and to aloe vera gel, which is an alternative external cryoprotectant. | 2020 | 32281210 |
| structural and ultrastructural characteristics of the tongue of the collared peccary (pecari tajacu, linnaeus, 1758). | the tongue is an important organ in species due to its feeding functions, and its structure is influenced by the habitat and diet. the collared peccary (pecari tajacu, linnaeus, 1758) is a terrestrial mammal that is distributed on the american continents and has an omnivorous diet. this study aimed to describe the morphological characteristics of the tongue, lingual papillae and the connective tissue cores (ctcs) of the collared peccary. eight tongues were collected from the wild animals multipl ... | 2020 | 32237176 |
| captive-born collared peccaries learning about their predators: lessons learnt but not remembered. | captive-born animals frequently lose their anti-predatory abilities due to the absence of encounters with their predators, but these abilities can be regained through specific training. anti-predator training can, thus, enhance the success of reintroduction programs with predator naïve animals. in addition, a good memory is important to guarantee the effects of the anti-predator training and increase survival rate after release into the wild. in the present study, anti-predator training sessions ... | 2020 | 31899275 |
| composition of collared peccary seminal plasma and sperm motility kinetics in semen obtained during dry and rainy periods in a semiarid biome. | the aim of this study was to evaluate environmental effects in a semiarid region on collared peccary seminal plasma content and sperm motility. ejaculates from 12 mature males were obtained during the peak of rainy and dry periods of the caatinga biome. samples were evaluated for semen volume, ph, as well as sperm concentration, morphology, osmotic response, membrane integrity, chromatin condensation, and kinetic motility. seminal plasma was evaluated for ions and organic compounds. the values f ... | 2019 | 31785636 |
| production of collared peccary (pecari tajacu linnaeus, 1758) parthenogenic embryos following different oocyte chemical activation and in vitro maturation conditions. | to optimize the protocols for assisted reproductive techniques (arts) in collared peccary (pecari tajacu linnaeus, 1758), we evaluated various conditions for oocyte in vitro maturation (ivm) and chemical activation. initially, we assessed the ivm rates, cumulus-oocyte complex (coc) quality, and oocyte morphometry in the absence or presence of epidermal growth factor (egf). there was no difference between the cocs matured in absence or presence of egf for the expansion of cumulus cells (97.6% ± 1 ... | 2020 | 31711691 |
| vitrification of collared peccary ovarian tissue using open or closed systems and different intracellular cryoprotectants. | this study aimed to evaluate different vitrification methods using distinct cryoprotectants (cpas) for the preservation of collared peccary ovarian preantral follicles (pfs). ovarian pairs from six females were fragmented and three fragments (fresh control group) were immediately evaluated for morphology, viability, cell proliferation capacity (assessed by quantifying the number of argyrophilic nucleolus organizer regions - nors), and apoptosis (by the identification of activated caspase-3 expre ... | 2019 | 31639331 |
| reproductive monitoring of collared peccary females (pecari tajacu) by analysis of fecal progesterone metabolites. | the measurement of fecal progesterone metabolites (fpm) by enzyme immunoassay analysis is a non-invasive technique that permits gathering reproductive information from wildlife without the stress associated with restraint. in the collared peccary (pecari tajacu), a high correlation between serum progesterone and fpm levels (r2 = 0.783) suggests that fpm can be used to monitor their reproductive function. we monitored fpm during the estrous cycle of 15 collared peccary females. estrous cycles ave ... | 2019 | 31108432 |
| effect of cryoprotectant type and concentration on the vitrification of collared peccary (pecari tajacu) ovarian tissue. | the aim of the present study was to establish a protocol for solid surface vitrification of peccary ovarian tissue by using different cryoprotectants. ovarian pairs from five adult females were fragmented and two fragments (fresh control group) were immediately subjected to morphological evaluation using classical histology, transmission electron microscopy, and viability analysis using fluorescent probes. the remaining fragments (n = 18) were vitrified using a solid surface method with differen ... | 2019 | 31047761 |
| ultrastructural description of fresh and frozen/thawed sperm derived from collared peccaries (pecari tajacu linnaeus, 1,758). | the aim was to describe, through scanning electron microscopy (sem) and transmission electron microscopy (tem), the ultrastructure of peccaries' fresh and frozen-thawed sperm. for that, semen derived from three mature males was obtained by electroejaculation and evaluated for motility, membrane integrity, membrane functionality, chromatin integrity, and morphology through light microscopy. samples were frozen using a tris extender plus egg yolk (20%) and glycerol (6%). then, fresh and frozen-tha ... | 2018 | 30295377 |
| influence of storage time and nutrient medium on recovery of fibroblast-like cells from refrigerated collared peccary (pecari tajacu linnaeus, 1758) skin. | animal cloning is a promising technology for biodiversity conservation, and its success depends on the recovery of nucleus donor cells. specifically for collared peccaries, found sometimes in regions that are difficult to access, the storage at 4-6°c of skin tissues would be an alternative for the conservation of genetic material. therefore, we aimed to evaluate different storage periods and the presence of a nutrient medium at 4-6°c on the recovery of somatic cells from the skin of collared pec ... | 2018 | 29923165 |
| combination of intracellular cryoprotectants preserves the structure and the cells proliferative capacity potential of adult collared peccary testicular tissue subjected to solid surface vitrification. | the objective was to evaluate different permeating cryoprotectants to vitrify testicular tissue biopsies from adult collared peccaries. five pairs of testicles were dissected into fragments (9 mm³) that were allocated to non-vitrified (control) and vitrified groups using a solid-surface method following exposure to different cryoprotectants (3.0 m dimethyl sulfoxide (dmso), 3.0 m ethylene glycol (eg) or 1.5 m dmso + 1.5 m eg). after warming, samples were evaluated for histomorphology, ultrastruc ... | 2019 | 31678072 |
| establishment of a protocol for the isolation of ovarian preantral follicles derived from collared peccaries (pecari tajacu). | we compare the efficiency of mechanical or enzymatic methods, and their combination, for the isolation of ovarian preantral follicles (pfs) from collared peccaries. the ovaries from six females were subjected to the different methods investigated here. for the enzymatic method, ovary fragments were exposed to collagenase type iv in tcm-hepes medium; the mechanical procedure was based on ovarian cortex dissociation by using a scalpel blade. the residual solution obtained after the mechanical isol ... | 2019 | 31412974 |
| embryonic and fetal development of the collared peccary (pecari tajacu). | the relative timing of the main fetal development events in species determine the extent of fetal development at birth, which range along a gradient of having altricial and precocial traits. the results from this study allow for description of important fetal developments in collared peccary (pecari tajacu) using data from 118 embryo/fetuses from 68 pregnant peccaries obtained over a period of 15 years through collaborative methods with local hunters in the amazon. the chronological order of eme ... | 2019 | 31405484 |
| single injection of ecg/hcg leads to successful estrous synchronization in the collared peccary (pecari tajacu linnaeus, 1758). | the establishment of protocols for the control of the ovarian function of collared peccaries is recommended for the development of assisted reproductive techniques. the goals were to (1) compare a gonadotropin combination with prostaglandin analogue to synchronize timing of onset of estrus among animals, and (2) elucidate the effects of the most desirable protocol for performing an artificial insemination study and macroscopic evaluation of the ovaries. three of five females treated with a doubl ... | 2019 | 31405481 |
| seasonal denning behavior and population dynamics of the late pleistocene peccary platygonus compressus (artiodactyla: tayassuidae) from bat cave, missouri. | the late pleistocene faunal assemblage from bat cave, central ozarks, missouri provides an opportunity to assess specific aspects of behavior, ecology, and ontogeny of the rancholabrean species platygonus compressus. all identifiable elements referable to this taxon were catalogued and examined, and a minimum number of individuals of 73 was determined for the sample. evidence of seasonal behavioral patterns are reported for the first time in a fossil peccary. maturation of individuals was assess ... | 2019 | 31308997 |
| postnatal testis development in the collared peccary (tayassu tajacu), with emphasis on spermatogonial stem cells markers and niche. | collared peccaries (tayassu tajacu) present a unique testis cytoarchitecture, where leydig cells (lc) are mainly located in cords around the seminiferous tubules (st) lobes. this peculiar arrangement is very useful to better investigate and understand the role of lc in spermatogonial stem cells (sscs) biology and niche. recent studies from our laboratory using adult peccaries have shown that the undifferentiated type a spermatogonia (aund or sscs) are preferentially located in st regions adjacen ... | 2019 | 29763586 |
| environmental factors related to a semiarid climate influence the freezability of sperm from collared peccaries (pecari tajacu linnaeus, 1758). | the influence of environmental factors in a semiarid climate on characteristics of fresh and frozen/thawed sperm collected from collared peccaries (pecari tajacu) was assessed. semen from 11 male collared peccaries was collected by electroejaculation during the peaks of the dry and rainy periods while rainfall indices, air temperatures, relative humidity levels, and wind speeds were measured. the number, motility, morphology, osmotic response, and membrane integrity of sperm in the collected eja ... | 2018 | 29708774 |
| interactions between different media and follicle-stimulating hormone supplementation on in vitro culture of preantral follicles enclosed in ovarian tissue derived from collared peccaries (pecari tajacu linneaus, 1758). | the aim was to verify the effect of follicle-stimulating hormone (fsh) supplementation to α-mem+ or tcm199+ media on the in vitro development of ovarian preantral follicles (pfs) derived from collared peccaries. ovaries (n = 5 pairs) were collected and divided into fragments destined to control group (non-cultured) or treatments that were cultured for 7 days. the pfs morphology, growth and activation were evaluated by classical histology. the immunohistochemistry markers ag-nor and pcna were use ... | 2018 | 29604127 |