semen analysis parameters from a captive population of the endangered chacoan peccary (catagonus wagneri) in paraguay.baseline information about the reproductive physiology of an endangered species is vital to captive breeding programs. this study analyzed reproductive parameters from eleven captive chacoan peccaries (catagonus wagneri) (mean age: 10.5 ± 1.2 years old) in paraguay. after immobilization, testis length, width and firmness (hard to flaccid, 1-3) were assessed, followed by electroejaculation and analysis of semen. samples were examined for percentage and progressive motility, total cell count, perc ...201829807826
disruption of thermogenic ucp1 predated the divergence of pigs and peccaries.uncoupling protein 1 (ucp1) governs non-shivering thermogenesis in brown adipose tissue. it has been estimated that pigs lost ucp1 ∼20 million years ago (mya), dictating cold intolerance among piglets. our current understanding of the root causes of ucp1 loss are, however, incomplete. thus, examination of additional species can shed light on these fundamental evolutionary questions. here, we investigated ucp1 in the chacoan peccary (catagonus wagneri), a member of the tayassuid lineage that dive ...202032620708
streptococcus catagoni sp. nov., isolated from the respiratory tract of diseased chacoan peccaries (catagonus wagneri).novel catalase-negative, gram-stain-positive, beta-haemolytic, coccus-shaped organisms were isolated from chacoan peccaries that died from respiratory disease. the initial api 20 strep profiles suggested streptococcus agalactiae with acceptable identification scores, but the 16s rrna gene similarity (1548 bp) to available sequences of streptococci was below 98 %. next taxa of the genus streptococcus, displaying highest similarities to the strains from this study, were s. bovimastitidis nz1587t ( ...202032941130
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) ...201930690318
catagonus, an "extinct" peccary, alive in paraguay.a third species of peccary, discovered in the chaco of paraguay, is added to the living members of family tayassuidae. it is assigned to the genus catagonus ameghino, heretofore considered confined to the pleistocene. the new peccary is conspecific with catagonus wagneri (rusconi), a species placed in the related extinct genus platygonus leconte when it was described from pre-hispanic archeological deposits of argentina.197517840828
immobilization of giant chacoan peccaries (catagonus wagneri) with a tiletamine hydrochloride/zolazepam hydrochloride combination.a tiletamine/zolazepam combination was used to immobilize 24 captive giant chacoan peccaries (catagonus wagneri) at a mean dosage rate of 2.18 mg/kg (sd = 0.46) of body weight, given intramuscularly. the mean induction time (the time from injection until recumbency) was 7.6 min (sd = 2.1). standing time (the time from injection until the peccary stood without stimulation or assistance) ranged from 90 to 240 min. tiletamine/zolazepam in combination was an effective and safe immunobilizing agent f ...19921512892
estimating temporal independence of radio-telemetry data on animal activityradio-telemetry is an excellent tool for gathering data on the biology of animals and their interactions with the environment they inhabit. many methods have been developed for analyses of spatial information, on home range size and utilization density. activity patterns are often described using radio-tracking data, but no generally accepted method is currently available specifically for determining the temporal independence of this type of data for statistical inference. activity rhythms have ...199910373355
immobilization of chacoan peccaries (catagonus wagneri) using medetomidine, telazol, and ketamine.a combination of medetomidine, telazol, and ketamine hydrochloride was used to immobilize captive chacoan peccaries (catagonus wagneri) for translocation within paraguay during august-october 2002. animals were darted in enclosed areas of varying size. the average dose used was 32.5+/-7.2 microg/kg of medetomidine, 0.63+/-0.2 mg/kg of telazol, and 3.9+/-0.65 mg/kg of ketamine. first effects were noted at 4.3+/-2.1 min, and ability to handle the animals was achieved by 12.6+/-3.7 min. heart and r ...200415650091
chromosomal evolution and phylogenetic analyses in tayassu pecari and pecari tajacu (tayassuidae): tales from constitutive heterochromatin.the mammalian family tayassuidae (peccaries) is confined to the new world and comprises three recognized extant species, white-lipped (tayassu pecari), collared (pecari tajacu) and chacoan (catagonus wagneri) peccaries, which exhibit distinct morphological and chromosomal features. the phylogenetic relationships among the tayassuids are unclear and have instigated debate over the palaeontological, cytogenetic and molecular aspects. constitutive heterochromatin analysis can be used in understandi ...200717656845
volatile components in dorsal gland secretions of the chacoan peccary, catagonus wagneri.the dorsal gland secretions of captive-reared male and female chacoan peccaries (catagonus wagneri) were analyzed by gas chromatography-mass spectrometry. c8-c19 carboxylic acids, squalene, cholesterol, cholestanol, and cholest-7-en-3-ol were present in both males and females. heptylbenzene, c14-c18 methyl esters, and an isomer of springene were observed in males. c15-c19 aldehydes were observed in females. the composition of the dorsal gland secretions of c. wagneri is compared to what has been ...200919040119
significance of a diploid number of 20 in the peccary catagonus wagneri. 20144031469
amblyomma boeroi n. sp. (acari: ixodidae), a parasite of the chacoan peccary catagonus wagneri (rusconi) (artiodactyla: tayassuidae) in argentina.all parasitic stages of amblyomma boeroi n. sp. (acari: ixodidae) are described here from catagonus wagneri (rusconi) in argentina. the diagnostic characters for the male are a combination of orbited eyes, a 2/2 dental formula, coxa iv considerably larger than coxae i-iii and with a long, sickle-shaped, medially directed spur arising from its internal margin, a scutum which is light grey to very pale ivory in colour, and the absence of a postanal groove. the diagnostic characters for the females ...200919472076
nuclear and mitochondrial evolutionary analyses of collared, white-lipped, and chacoan peccaries (tayassuidae).the three extant peccary species, the chacoan (catagonus wagneri), the white-lipped (tayassu pecari) and the collared (pecari tajacu), are morphologically and chromosomally distinct and confined to the new world. there is ongoing paleontological, cytogenetic, and molecular debate about phylogenetic relationships among them. to contribute to the understanding of tayassuidae phylogeny, three mitochondrial (control region, cytochrome b, and 12s rrna) and five nuclear (k-casein, thyrotropin, tyrosin ...200515579391
observations on neonatal mortality of the chacoan peccary, catagonus wagneri.the considerable neonatal mortality of a captive population of chacoan peccaries, the taguá (catagonus wagneri), in paraguay was investigated with the examination of six newborn animals and one adult. most deaths occur primarily because of restriction of space resulting in competition for space and nutrition. the adult had nonlethal inhalation pulmonary anthracosis. neonatal pulmonary nocardiosis was noted in one infant and is believed to be related to the dust storms prevailing locally. another ...19958578644
Displaying items 1 - 14 of 14