| [studies on wild disease reservoirs and vectors of trypanosoma cruzi: lxiv. natural infection of the rodent dasyprocta aguti (linnaeus, 1766) by t. cruzi]. | | 1977 | 406645 |
| experimental heteroxenous cycle of lagochilascaris minor leiper, 1909 (nematoda: ascarididae) in white mice and in cats. | reports of natural infections of sylvatic carnivores by adult worms of species similar to lagochilascaris minor in the neotropical region led to attempts to establish experimental cycles in laboratory mice and in cats. also, larval development was seen in the skeletal muscle of an agouti (dasyprocta leporina) infected per os with incubated eggs of the parasite obtained from a human case. in cats, adult worms develop and fertile eggs are expelled in the feces; in mice, larval stages of the parasi ... | 1992 | 1343667 |
| [infection induced in wild rodents dasyprocta leporina (rodentia: dasyproctidae), with larval eggs of lagochilascaris minor (nematoda: ascarididae)]. | specimens of dasyprocta leporina (linnaeus, 1758) were raised out their natural environment. at three to four months of age they were orally inoculated with lagochilascaris minor (leiper, 1909) eggs obtained from a native patient. the eggs were incubated for more than 80 days so that it was possible to obtain, by mechanical compression, larvae that could be maintained alive in liquid medium for 48 hours or more. the animals were sacrificed 14-46 days after infection and tangled larva in inflamma ... | 1990 | 2135484 |
| susceptibility of the agouti (dasyprocta aguti) to foot-and-mouth disease virus. | | 1969 | 4320315 |
| [esterases zymograms of the rabbit (lepus cuniculus) and agouti (dasyprocta aguti) salivary glands with the use of alpha naphthyl esters]. | | 1967 | 5231002 |
| the taxonomic status of echinococcus cruzi brumpt and joyeux, 1924 (cestoda: taeniidae) from an agouti (rodentia: dasyproctidae) in brazil. | paratype material of echinococcus cruzi brumpt and joyeux, 1924, described from an agouti, dasyprocta leporina (l.), in brazil, was compared with echinococcus oligarthrus (diesing, 1863), of which the larval stage occurs also in agoutis and other rodents in south america and central america. comparisons of the larval cestodes (metacestodes) showed that the rostellar hooks from protoscolices of the two taxa corresponded in form, and their slightly greater lengths in e. cruzi were considered to be ... | 1984 | 6470893 |
| some bacterial enteropathogens in wildlife and racing pigeons from trinidad. | fecal and cloacal swabs or feces of wild mammalian, avian and reptilian species, either farmed or free-ranging, and of racing pigeons (columba livia) kept in lofts were cultured for salmonella spp., campylobacter spp., and yersinia spp. of 291 free-ranging mammals tested, 6 (2%) and 1 (< 1%) yielded positive cultures of salmonella spp. and campylobacter spp., respectively. salmonella newport was the predominant serotype isolated and the opossum (didelphis marsupialis insularis) had the significa ... | 1998 | 9476228 |
| wild rodents as experimental intermediate hosts of lagochilascaris minor leiper, 1909. | a total of 25 specimens of cavia porcellus (guinea pig), 5 dasyprocta agouti (agouti), and 22 calomys callosus (vesper mice) were inoculated with infective eggs of lagochilascaris minor. the inoculum was prepared with embryonated eggs and orally administered to each individual animal through an esophagus probe. in parallel, 100 specimens of felis catus domesticus were individually fed with 55-70 nodules containing 3rd-stage larvae encysted in tissues of infected rodents. animals were examined an ... | 1999 | 10445999 |
| a survey of hemoparasite infections in free-ranging mammals and reptiles in french guiana. | blood smears of 1,353 free-ranging mammals (35 species) and 112 reptiles (31 species) from french guiana were examined for hemoparasites. parasites from 3 major groups were recorded: apicomplexa (including hemogregarines, piroplasms, and plasmodium spp.), trypanosomatidae, and filaroidea. fifty percent of the individuals (86% of the species) were infected by parasites from at least 1 group. hemogregarines, identified as hepatozoon sp., infected numerous snakes with high prevalences (30-100%); in ... | 2000 | 11128476 |
| an autochthonous case of echinococcus vogeli rausch & bernstein, 1972 polycystic echinococcosis in the state of rondônia, brazil. | the present case report refers to a patient from the state of rondônia, north region of brazil, attended with clinical suspicion of hepatic echinococcosis. examination by imaging (ultrasonography and computerized tomography) revealed a conglomerate of cystic lesions, with mobile contents within the cyst. the serology (immunoblot) for echinococcus sp. was positive (21 and 31 kda bands). this case is the first reported in rondônia, suggesting the need to investigate the polycystic echinococcosis i ... | 2002 | 11992162 |
| laboratory infection of the agouti, dasyprocta aguti, with schistosoma mansoni. | | 1953 | 13092377 |
| comparative study on the forefoot and hindfoot intrinsic muscles of some cavioidea rodents (mammalia, rodentia). | the present study compares the forefoot and hindfoot musculature of five representative species of cavioidea rodents. in all species, the musculature of both forefeet and hindfeet have the same array regardless of the absence of digit i in the manus of hydrochaeris hydrochaeris and cavia porcellus. our results suggest a tendency in these species towards a three-digit system, with a functional loss of digit v and a predominance of digit iii in their forefeet. in the same way, the muscular reducti ... | 2007 | 17008077 |
| observations on eimeria species of dasyprocta leporina (linnaeus, 1758)(rodentia: dasyproctidae) from the state of pará, north brazil. | redescriptions are given of the mature oocysts of eimeria aguti carini 1935, e. cotiae carini, 1935 and e. paraensis carini, 1935, in the faeces of five specimens of the rodent dasyprocta leporina (rodentia: dasyproctidae) from the state of pará, north brazil. new information is provided on the sporulation time of these parasites and the prepatent period in experimentally infected d. leporina. some endogenous stages of e. cotiae are described in the epithelial cells of the ileum, and the absence ... | 2007 | 17426883 |
| parasitism of two zoonotic reservoirs dasyprocta leporina and d. fuliginosa (rodentia) from amazonas, with trichostrongylina nematodes (heligmonellidae): description of a new genus and a new species. | a new genus and a new species of heligmonellidae nematodes are described parasiting the stomach of three agoutis (two dasyprocta fuliginosa and one d. leporina) captured in the middle and high negro river microregion, state of amazonas, brazil. the new genus, as well as its type-species, are closely related to the trichostrongylids included in fuellebornema, particularly on what concerns the pattern of the caudal bursa, but differing from them by the characteristics of the synlophe, that present ... | 2007 | 17924008 |
| development of the inverted visceral yolk sac in three species of caviids (rodentia, caviomorpha, caviidae). | guinea pig related rodents possess numerous derived placental characters. we attempt to identify diversity within the visceral yolk sac and its association with the chorioallantoic placenta in three species of caviids, two of them possessing a capsule formed by the decidua that covers the chorioallantoic placenta. the results verify that in early pregnancy all three species have an inverted yolk sac placenta. in advanced pregnancy the species differ: galea spixii, as representative without a cap ... | 2008 | 18586321 |
| can forest fragmentation disrupt a conditional mutualism? a case from central amazon. | this is the first study to investigate whether scatter-hoarding behavior, a conditional mutualism, can be disrupted by forest fragmentation. we examined whether acouchies (myoprocta acouchy, rodentia) and agoutis (dasyprocta leporina, rodentia) changed scatter-hoarding behavior toward seeds of astrocaryum aculeatum (arecaceae) as a consequence of a decrease in forest-patch area. our study was conducted at the 30-year-old biological dynamics of forest fragments project, in central amazon, brazil. ... | 2009 | 19633870 |
| echinococcus oligarthrus cystic hydatidosis in brazilian agouti (dasyprocta leporina). | echinococcus oligarthrus hydatid cyst disease was diagnosed in two imported wild-caught brazilian agouti (dasyprocta leporina). the cysts were found incidentally during routine examinations and never appeared to cause any apparent clinical signs. identification of the cysts was confirmed via histopathology. over a period of 2 yr, the cysts calcified but did not reabsorb. treatment with praziquantal and albendazole did not appear to affect the cysts. agoutis are intermediate hosts of e. oligarthr ... | 2009 | 19746872 |
| occurrence of toxoplasma gondii antibodies in dasyprocta aguti from brazil: comparison of diagnostic techniques. | in this study, the occurrence of antibodies to toxoplasma gondii in brazilian agouti (dasyprocta aguti) was compared by modified agglutination test (mat) and indirect fluorescent antibody test (ifat) using anti-capybara conjugate. sera from 109 animals were tested using mat (1:25 cut-off) and ifat (1:16 cut-off); 19% were positive by mat, and 18% were positive by ifat. overall, the 17 ifat-positive samples were also positive for mat. the four positive mat samples with a titer < or = 200 were ifa ... | 2011 | 22204080 |
| ultrastructural features of agouti (dasyprocta aguti) preantral follicles cryopreserved using dimethyl sulfoxide, ethylene glycol and propanediol. | the objective was to develop an efficient protocol for cryopreservation of agouti (dasyprocta aguti) ovarian tissue. agouti ovarian fragments were placed, for 10 min, in a solution containing mem and fetal bovine serum plus 1.5 m dimethyl sulfoxide (dmso), ethylene glycol (eg) or propanediol (proh); some of those fragments were subsequently cryopreserved in a programmable freezer. after exposure and/or thawing, all samples were fixed in carnoy prior to histological analysis. to evaluate ultrastr ... | 2011 | 21924476 |
| Compartmentalization of Cerebral Cortical Germinal Zones in a Lissencephalic Primate and Gyrencephalic Rodent. | Previous studies of macaque and human cortices identified cytoarchitectonically distinct germinal zones; the ventricular zone inner subventricular zone (ISVZ), and outer subventricular zone (OSVZ). To date, the OSVZ has only been described in gyrencephalic brains, separated from the ISVZ by an inner fiber layer and considered a milestone that triggered increased neocortical neurogenesis. However, this observation has only been assessed in a handful of species without the identification of the di ... | 2011 | 22114081 |
| organization of tactile thalamus and related behavior in the agouti, dasyprocta aguti. | | 2016 | 5037554 |
| aerobic microflora and endoparasites of freshly shot wild agouti (dasyprocta leporina) in trinidad, west indies. | the agouti ( dasyprocta leporina ) is a new world wild rodent hunted for its meat in trinidad and other latin american countries. studies on agouti under captive conditions have yielded some data on health-related aspects, but relatively very little is known about their wild counterparts. the environment of the agouti can influence the microflora and parasites harbored by the animals, which may contain zoonotic pathogens. here, the microflora found on the nasal mucosa and sections of the intesti ... | 2016 | 28080916 |
| molecular identification of trypanosomatids in wild animals. | diverse wild animal species can be reservoirs of zoonotic flagellate parasites, which can cause pathologic chagas disease. the present study aimed to detect the natural occurrence of flagellate parasites through direct microscopic examination of the parasites in blood samples and through pcr of whole blood and blood culture (haemoculture) samples from 38 captive and 65 free-living wild animals in the centre for conservation of wild fauna (ccwf), an area endemic for leishmaniasis. for this study, ... | 2014 | 24636787 |
| environmentally associated ticks (acari: ixodidae) in campo grande, mato grosso do sul, brazil. | herein, we report tick species found on wild and domestic animals and in the environment during a one-year sampling period at the brazilian farming research company beef cattle unit (embrapa beef cattle), which is located within the urban area of campo grande, mato grosso do sul, brazil. from 55 wild hosts including six different species (nasua nasua, cebus spp., cerdocyon thous, myrmecophaga tridactyla, tamandua tetradactyla and dasyprocta aguti), 323 ticks were collected. amblyomma ovale ticks ... | 2013 | 24252958 |
| the brainstem localization of gastric preganglionic parasympathetic neurons in the agouti (dasyprocta leporina). | this study was designed to determine qualitatively, the source of gastric vagal nerve fibres in the agouti. a total of 18 male and female adult agoutis were used for the present investigation. following anaesthesia, laparotomy was performed and the stomach exteriorized. multiple intramuscular injections of wheat germ agglutinin-horseradish peroxidase (wga-hrp) were then made into different areas of the stomach in the experimental animals. the control animals were divided into four groups of two ... | 2013 | 24756734 |
| zygomycetes from herbivore dung in the ecological reserve of dois irmãos, northeast brazil. | thirty-eight taxa of zygomycetes distributed in 15 genera were recorded from tapir (tapirus terrestris), camel (camelus bactrianus), horse (equus caballus), deer (cervus elaphus), agouti (dasyprocta aguti), donkey (equus asinus), llama (llama glama) and waterbuck (kobus ellipsiprymnus) dung collected at the reserva ecológica de dois irmãos located in recife, state of pernambuco, northeast brazil. the samples were collected on a monthly basis from june 2005 to may 2006, taken to the laboratory an ... | 2011 | 24031609 |
| ecological relationships of meso-scale distribution in 25 neotropical vertebrate species. | vertebrates are a vital ecological component of amazon forest biodiversity. although vertebrates are a functionally important part of various ecosystem services they continue to be threatened by anthropogenic impacts throughout the amazon. here we use a standardized, regularly spaced arrangement of camera traps within 25km2 to provide a baseline assessment of vertebrate species diversity in a sustainable use protected area in the eastern brazilian amazon. we examined seasonal differences in the ... | 2015 | 25938582 |
| water availability not fruitfall modulates the dry season distribution of frugivorous terrestrial vertebrates in a lowland amazon forest. | terrestrial vertebrate frugivores constitute one of the major guilds in tropical forests. previous studies show that the meso-scale distribution of this group is only weakly explained by variables such as altitude and tree basal area in lowland amazon forests. for the first time we test whether seasonally limiting resources (water and fallen fruit) affect the dry season distribution in 25 species of terrestrial vertebrates. to examine the effects of the spatial availability of fruit and water on ... | 2017 | 28301589 |
| serological evaluation of ovarian steroids of red-rumped agouti (dasyprocta leporina) during the estrous cycle phases. | the objective of this study was to evaluate serum progesterone (p4) and 17β estradiol (e2) concentrations throughout the estrous cycle in the red-rumped agouti (dasyprocta leporina). a total of eight multiparous, captive-bred females were bled throughout their estrous cycle via saphenous venipuncture, with e2 and p4 concentrations being measured via elisa of the serum collected. serum e2 ranged from 1212 to 3500pg/ml with a peak value coinciding with observed estrus. however, two additional peak ... | 2016 | 27876215 |
| comparison among different cryoprotectants for cryopreservation of epididymal sperm from agouti (dasyprocta leporina). | we verify the effects of different cryoprotectants on the cryopreservation of agouti (dasyprocta leporina) epididymal sperm. we used 16 pairs of testes-epididymis complexes of sexually mature animals. we immediately evaluated epididymal sperm obtained by retrograde flushing for concentration, motility, vigor, viability, osmotic response, and morphology. samples were extended in a coconut water extender plus 20% egg yolk, containing glycerol, ethylene glycol, dimethylsulfoxide - dmso, or dimethyl ... | 2015 | 26408846 |
| the morphology of the pineal gland of the yellow-toothed cavy (galea spixii wagler, 1831) and red-rumped agouti (dasyprocta leporina linnaeus, 1758). | the pineal gland is an endocrine gland found in all mammals. this article describes the morphology of this important gland in two species of caviideae, namely the yellow-toothed cavy and the red-rumped agouti. ten adult animals of the two species used in current analysis were retrieved from the center for the multiplication of wild animals (cemas/ufersa) and euthanized. the glands were removed and photographed in situ and ex situ. they were fixed in a paraformaldehyde solution 4% or glutaraldehy ... | 2015 | 26096491 |
| interactions among different devices and electrical stimulus on the electroejaculation of captive agoutis (dasyprocta leporina). | the interactions among different electroejaculation devices associated with serial or continuous stimuli were investigated to improve the efficiency of the electroejaculation for semen collection in agoutis. ten sexually matured male dasyprocta leporina were restrained by the intramuscular administration of xylazine-ketamine association. each individual was randomly subjected to four electroejaculation protocols, by combining two devices (one presenting longitudinal electrodes emitting square wa ... | 2015 | 25800458 |
| carrion consumption by dasyprocta leporina (rodentia: dasyproctidae) and a review of meat use by agoutis. | the consumption of the carrion of a tapiti by a reintroduced female dasyprocta leporina was observed in the wild. herein, besides describing this event, we reviewed other evidence of vertebrate consumption by agoutis. most of the studies describing this behaviour have been carried out in captivity. the preyed animals included birds and small rodents, which were sometimes killed by agoutis. this pattern suggests that this is not an anomalous behaviour for the genus, reflecting its omnivorous habi ... | 2014 | 25296206 |
| structural and ultrastructural features of the agouti tongue (dasyprocta aguti linnaeus, 1766). | the agouti (dasyprocta aguti linnaeus, 1766) is a wild rodent belonging to the family dasyproctidae that is found throughout brazil and feeds on fruits and seeds. the aim of the present study was to describe the following features of the tongue of agouti: its morphological structures, the three-dimensional characteristics of the lingual papillae surface, the connective tissue cores (ctcs) and the epithelial cell ultrastructure. four types of papillae were observed on the dorsal surface of the to ... | 2013 | 23701183 |
| anatomical stages of penile erection in the agouti (dasyprocta leporina) induced by electro-ejaculation. | the reproductive system of the male agouti is not well documented. this study describes the specific anatomical features of the free part of the penis occurring during penile erection in the agouti. electro-ejaculation was used to induce erection in three male agoutis that had previously produced offspring. results proved that there were four stages in the erection process. stage 1 involved protrusion of the penis from the preputial orifice. the lateral penile cartilages were then spread (stage ... | 2012 | 22352811 |
| the organization of the brainstem nuclei associated with the vagus nerve in the agouti (dasyprocta leporina). a neurohistological study. | a total of six adult animals were used for the study. following anaesthesia via intraperitoneal injection of a mixture of ketamin and bombazine in ratio 2:1, thoracotomy was performed to exteriorize the heart for intracardial perfusion. the perfusion canular was inserted into the left ventricle and animal perfused sequentially with normal saline and 10% formal saline. following perfusion, craniotomy was performed to remove the entire brain along with the upper segments of the spinal cord. the br ... | 2011 | 21809711 |
| interactions between straw size and thawing rates on the cryopreservation of agouti (dasyprocta aguti) epididymal sperm. | this study verifies the interactions between straw size and thawing rates and their impact on the epididymal sperm from this species. caudae epididymidum from 10 agoutis were subjected to retrograde washing using a coconut water extender (acp-109c(®) ). epididymal sperm were evaluated and extended in acp-109c(®) plus egg yolk (20%) and glycerol (6%). the samples were packaged in 0.25- or 0.50-ml straws, frozen in liquid nitrogen and thawed at 37°c/1 min or 70°c/8 s, followed by a re-evaluation. ... | 2012 | 21645127 |
| improving the efficiency of the preliminary electroejaculation technique developed for semen collection from the agouti (dasyprocta leporina). | this study tested various combinations of ketamine and xylazine with the objective to improve on the efficiency of the preliminary electroejaculation technique developed for semen collection from the agouti (dasyprocta leporina). there were two experiments, which were each replicated. experiment 1 had six treatments: treatment 1 (30 mg/kg ketamine and 10 mg/kg xylazine), treatment 2 (20 mg/kg ketamine and 10 mg/kg xylazine), treatment 3 (30 mg/kg ketamine and 5 mg/kg xylazine), treatment 4 (20 m ... | 2010 | 21370643 |
| collection and evaluation of epididymal sperm in captive agoutis (dasyprocta aguti). | the objective was to establish a protocol for the collection and evaluation of epididymal sperm in agoutis. eight males (1-2 y old) underwent left orchidectomy and epididymal sperma were collected by retrograde flush. average values were flush volume 32 μl, ph 6.9, sperm concentration 748 x 10(6) sperm/ml, with motility 86.5% and vigor 4.6. viable sperm were present in all flush samples; 66% of sperm were alive, and 41.9% of sperm responded positively to the hypoosmotic test (using distilled wat ... | 2011 | 21040962 |
| liquid and frozen storage of agouti (dasyprocta leporina) semen extended with uht milk, unpasteurized coconut water, and pasteurized coconut water. | this study evaluated the effects of semen extension and storage on forward progressive motility % (fpm%) in agouti semen. three extenders were used; sterilized whole cow's milk (uht milk), unpasteurized (cw) and pasteurized coconut water (pcw), and diluted to 50, 100, 150, and 200 × 10(6) spermatozoa/ml. experiment 1: 200 ejaculates were extended for liquid storage at 5(∘)c and evaluated every day for 5 days to determine fpm% and its rate of deterioration. experiment 2: 150 ejaculates were exten ... | 2010 | 20871831 |
| duration of spermatogenesis and spermatogenic efficiency in 2 large neotropical rodent species: the agouti (dasyprocta leporina) and paca (agouti paca). | the agouti (dasyprocta leporina) and paca (agouti paca) are among the largest extant rodent species. although these species have considerable economic potential, there are few reports in the literature concerning male reproductive biology in sexually mature agoutis and pacas. the objectives of the present study were to perform detailed stereologic and histologic analyses of the testis and estimate spermatogenic cycle length in these 2 neotropical rodent species as well as to compare the data wit ... | 2010 | 20378926 |
| polycystic kidney disease in adult brazilian agoutis (dasyprocta leporina). | during the last 21 years, 7 adult captive brazilian agoutis (dasyprocta leporina) from 4 different zoologic gardens were necropsied and histologically examined at the leibniz institute for zoo and wildlife research, berlin, germany. all animals had polycystic kidney disease as the major pathologic change. except in 1 case, no clinical signs were recognized prior to death. the animals had macroscopic bilateral alterations of the kidneys ranging from granulated surfaces to severe polycystic change ... | 2009 | 19276054 |
| the topography of cone photoreceptors in the retina of a diurnal rodent, the agouti (dasyprocta aguti). | the presence, density distribution, and mosaic regularity of cone types were studied in the retina of the diurnal agouti, dasyprocta aguti. longwave-sensitive (l-) and shortwave-sensitive (s-) cones were detected by antibodies against the respective cone opsins. l- and s-cones were found to represent around 90 and 10% of the cone population, respectively. there was no evidence for l- and s-opsin coexpression in agouti cones. l-cone densities were highest, up to 14,000/mm2, along a horizontal vis ... | 2009 | 19250601 |
| the gross and micro anatomy of the accessory sex glands of the male agouti (dasyprocta leporina). | this study was a follow up to the study on the gross anatomy of the male agouti (dasyprocta leporina) reproductive system. the seminal vesicles of the agouti are lobulated structures. the mean diameter of the large lumen is 883.6 +/- 76.83 microm. the mucosa (24.1 +/- 0.92 microm), which is lined by pseudo-stratified columnar epithelium is thrown into folds, which often branch. the lamina muscularis mucosa is thin and is made of loose connective tissue containing blood vessels. the mucosa of the ... | 2009 | 19007350 |
| spermatozoal morphologies and fructose and citric acid concentrations in agouti (dasyprocta leporina) semen. | this study was conducted to identify the levels of fructose and citric acid, and sperm morphologies in agouti (dasyprocta leporina) semen. these parameters may be important in identifying highly fertile semen from the agouti. the objectives were: (1) to investigate spermatozoal abnormalities in agouti semen and (2) to determine the concentrations of seminal fructose and citric acid in agouti semen samples. semen samples were collected from 16 anaesthetised male agouti by electro-ejaculation. fru ... | 2008 | 17919856 |
| a preliminary technique for electro-ejaculation of agouti (dasyprocta leporina). | this study focused on the effectiveness of electro-ejaculation of the agouti (dasyprocta leporina) and analysis of the collected semen. sexually mature male agouti were anesthetized with ketamine and electro-ejaculated. the means of ejaculation time was 5.48+/-0.31min, ejaculation voltage was 9.33+/-0.69v, ejaculation voltage range was 6-12v, amps was 0.5-1.5amps, ejaculation volume was 0.47+/-0.12ml and ph was 8.3+/-0.09. mean spermatozoa concentration, motility and percentage abnormalities wer ... | 2008 | 17889458 |
| the subplacenta of the red-rumped agouti (dasyprocta leporina l). | hystricognath rodents have a lobed placenta, comprising labyrinthine exchange areas and interlobular trophoblast. these correspond to the labyrinthine and spongy zones of other rodent placentae. beneath them, however, is a structure unique to hystricognath rodents called the subplacenta. we here describe the subplacenta of the red-rumped agouti and examine the possible functional correlates of this structure. | 2006 | 16740154 |
| arborescent palm seed morphology and seedling distribution. | this study examines how the seed morphology of two large arborescent palms, attalea maripa (aubl.) mart. and astrocaryum aculeatum g. mey, may affect their seed shadow in a seasonally dry amazonian forest. in addition to being smaller and produced in larger numbers than those of a. aculeatum, a. maripa seeds also presented a substantially lower amount of nutritional reserves available for the embryo. however, a. maripa seedlings were found in much higher numbers than those of a. aculeatum. the r ... | 2005 | 16532195 |
| horizontal cells in the retina of a diurnal rodent, the agouti ( dasyprocta aguti ). | the morphology and distribution of normally placed and displaced a horizontal cells were studied in the retina of a diurnal hystricomorph rodent, the agouti dasyprocta aguti. cells were labeled with anti-calbindin immunocytochemistry. dendritic-field size reaches a minimum in the visual streak, of about 9,000 microm(2), and increases toward the retinal periphery both in the dorsal and ventral regions. there is a dorsoventral asymmetry, with dorsal cells being larger than ventral cells at equal d ... | 2014 | 16469182 |
| the gross anatomy of the male reproductive system of a neotropical rodent: the agouti (dasyprota leporina). | the literature available on the agouti (dasyprocta leporina) is very limited. the agouti is a neotropical rodent found in trinidad and tobago, central and south america. this study focuses on one of the many unexplored areas relating to the species, the male reproductive system. the results showed that the mean testicular length, diameter and weight was 3.67 +/- 0.12 cm, 1.67 +/- 0.04 cm and 5.03 +/- 0.52 g respectively. the paired testes and epididymis were found in contact with the abdominal m ... | 2006 | 16433673 |
| quinolizidine alkaloids in ormosia arborea seeds inhibit predation but not hoarding by agoutis (dasyprocta leporina). | quinolizidine alkaloids (qas) are secondary compounds found in seeds of many species of plants, possibly protecting them against pathogens and seed predators. qas were isolated from ormosia arborea seeds and bioassayed against red-rumped agoutis (dasyprocta leporina, rodentia: caviomorpha) to verify if they inhibit seed predation and food hoarding (seed dispersal). three treatments were used: (1) seeds of o. arborea, (2) palatable seeds of mimusops coriacea (sapotaceae) treated with meoh, and (3 ... | 2003 | 12857021 |
| placentation in the capybara (hydrochaerus hydrochaeris), agouti (dasyprocta aguti) and paca (agouti paca). | placentae of three hystricimorph rodents--capybara, agouti and paca--were examined by conventional histology, immunohistochemistry for cytokeratin and vimentin, and tunel staining. the placentae were divided into lobules of labyrinthine syncytium separated by interlobular and marginal trophoblast. the subplacenta comprised cytotrophoblasts, supported on lamellae of allantoic mesoderm, and syncytiotrophoblast. the central excavation was still apparent in the definitive placenta of capybara. in ag ... | 2002 | 12061858 |
| the visual cortex of the agouti (dasyprocta aguti): architectonic subdivisions. | 1. we have studied the cytoarchitecture and myeloarchitecture of the agouti's cortical surface that can be activated by visual stimulation. five architectonic subdivisions that correspond to distinctive visuotopic representations were characterized. 2. the largest portion of the visual cortex is occupied by area 17 which is situated lateral to the cingulate cortex, medial to area 18, posterior to the parietal cortex, and anterior to the agranular retrosplenial cortex. additionally, four architec ... | 1989 | 2758167 |
| somatic sensory cortical regions of the agouti, dasyprocta aguti. | the localization and organization of primary (smi) and secondary (smi) somatic sensory cortical regions in agoutis, have been studied with micro- and macroelectrode-evoked potential techniques. for smi, the mean surface area determined using microelectrodes was 13% smaller than that obtained using macroelectrodes. the location and organization of smi are similar to those of other rodents: the largest representations were those of the vibrissae, the perioral regions and the first digit of the han ... | 1980 | 7388597 |
| some observations on reproduction in the female agouti, dasyprocta aguti. | | 1971 | 5102535 |
| the quantification of testicular cells during the postnatal development in two caviomorph rodents: the guinea pig (cavia porcellus) and the cutia (dasyprocta agouti). | the germinative, sertoli and leydig cells of two caviomorph rodents (cavia porcellus and dasyprocta agouti) were counted as well as the estimation of the total volume of the testis and the total volume of seminiferous tubules and interstitium in prepubertal, pubertal and adult animals. the number of spermatogonia, spermatocytes and spermatids cells increased during the pubertal phase in both rodents, notably the spermatid cells. the spermatocyte and spermatid slightly decreased in the adult of b ... | 2018 | 28832725 |
| post-implantation development of red-rumped agouti (dasyprocta leporina linnaeus, 1758). | fourteen pregnant agouti (dasyprocta leporina linnaeus, 1758) females at gestational ages of 30-100days and two at gestational ages of 55-100days, were studied, including 24 embryos/fetuses and two neonates (single offspring from two females). females were euthanized and embryos/fetuses were examined, measured, and photographed. embryos at 30days post-copulation were "c-shaped," with paddle-shaped limb buds and 10.75±0.11mm crown-rump length (crl). in embryos at 35days post-copulation, paddle-sh ... | 2017 | 28502649 |
| 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 |
| antibodies against brucella abortus and leptospira spp. in captive mammals in the states of pará and rio grande do norte, brazil. | brazil has a large variety of wild animal species, but limited data are available on the occurrence of brucella abortus and leptospira spp. antibodies in these animals. sera from 141 captive mammals belonging to 11 different species from the northern and northeastern regions of brazil were screened. antibodies against b. abortus and leptospira spp. (24 live serovars) were investigated using the rose bengal plate and microscopic agglutination tests, respectively. associations between the age, gen ... | 2018 | 29900792 |
| mammary diseases in a captive reared agouti (dasyprocta leporina) in trinidad. | the agouti (dasyprocta leporina) is a neotropical rodent that is utilized for its meat by hunters as well as wildlife farmers. there is a dearth of information on infectious diseases that affect these animals. at present, there has been no recording in the literature on diseases of mammary tissue in these animals. this case reported on the abnormal mammary enlargement of a four year old female agouti post-partum. blood, milk and tissue samples were taken for diagnostics to determine the cause of ... | 2020 | 32961654 |
| evaluation of unconventional supplements to the diet of intensively reared agouti (dasyprocta leporina) in trinidad, west indies. | a feed trial was carried out to evaluate potential unconventional feed resources such as trichanthera gigantica and moruga hill rice (oryza glaberrima) as a partial supplementation to the diet of adult male agoutis (dasyprocta leporina). supplemental feeding of the agouti will decrease feeding cost to produce this animal and aid in sustainable agricultural practices. male agoutis were used as this physiological state was the easiest to attain as well as male animals are generally used for meat p ... | 2020 | 32784963 |
| dystocia in a captive reared agouti (dasyprocta leporina) in trinidad and tobago, west indies. | dystocia is a complication that occurs at parturition either due to foetal or maternal factors. this condition has been well studies in domesticated species. however, there is very little information on dystocia in the agouti (dasyprocta leporina). the agouti is utilized for its meat in south america and the caribbean. more recently, farming of these animals intensively is being practiced in the neo-tropics. this case report attempted to provide some insight into dystocia in the agouti which has ... | 2020 | 32143289 |
| collateral arteries of the aortic arch of the red-rumped agouti (dasyprocta leporina linnaeus, 1758). | detailed knowledge of the arterial system is an important prerequisite when interpreting experimental data in research, as well as in the diagnosis of cardiovascular disease using imaging techniques such as doppler echocardiography and contrast radiography. thus, considering the importance of the aortic arrangement, the objective of this study was to describe the collateral arteries of the aortic arch of agoutis in order to establish the standard model, and therefore contribute to studies involv ... | 2020 | 32112454 |
| effects of vitrification techniques on the somatic tissue preservation of agouti (dasyprocta leporina linnaeus, 1758). | the cryobanks of agouti somatic tissues represent a promising tool for the conservation of this species and of those that are phylogenetically related and endangered. for these purposes, one strategy to guarantee the quality of samples after warming would be to choose the appropriate tissue vitrification technique. therefore, we evaluated the effects of two different techniques, direct vitrification in cryovials (dvc) and solid-surface vitrification (ssv), on the preservation of ear somatic tiss ... | 2020 | 32083486 |
| comparison of different intracellular cryoprotectants on the solid surface vitrification of red-rumped agouti (dasyprocta leporina lichtenstein, 1823) ovarian tissue. | in contributing to the conservation of wild rodents, the aim of this study was to evaluate the use of distinct cryoprotectants, separately or in combination, for solid surface vitrification (ssv) of red-rumped agouti ovarian tissue. ovarian cortex from nine females was recovered and fragmented. fresh fragments (control) were used to analyse the pre-antral follicle (pf) morphology using a histologic procedure, viability using the trypan blue test, cell proliferation by counting the argyrophilic n ... | 2020 | 31804747 |
| vertebromedullary topography of the red-rumped agouti (dasyprocta leporina linnaeus, 1758). | the agouti is a wild rodent located almost throughout the brazilian territory, with great scientific importance and high reproductive potential when farmed. in the clinical routine, clinical and surgical procedures are performed on the nervous system of these animals, such as epidural anesthesia and cerebrospinal fluid (csf) collection; however, data available are limited in literature on the main points of these procedures in this species. in this aspect, the objective was to describe the verte ... | 2020 | 31509338 |
| morphology of the genital organs of the female red-rumped agouti (dasyprocta leporina, linnaeus, 1758) during estrous cycle phases and in advanced pregnancy. | the study investigated the gross and microscopic anatomy of the genital organs of 20 agoutis at different stages of the estrous cycle and four in the final trimester of pregnancy. specimens were euthanized and their reproductive organs were fixed in a 4% paraformaldehyde or 2.5% glutaraldehyde solution and submitted to routine histological techniques for light and scanning electron microscopy. in the ovary, during the proestrus phase, we observed developing follicles and corpus luteum (cl) in re ... | 2019 | 31233245 |
| omnivorous behaviour of the agouti (dasyprocta leporina): a neotropical rodent with the potential for domestication. | the agouti is a neotropical rodent which is mainly utilized for its meat in rural communities. recently, captive rearing of these animals by wildlife farmers have increased in the neotropics. this short communication consists of observation of feeding behaviour of captive reared agoutis at the university of the west indies field station in trinidad and tobago. this is the first time in trinidad and tobago that meat consumption and the omnivorous behaviour of the agouti have been documented in th ... | 2019 | 31192022 |
| the organization and connections of second somatosensory cortex in the agouti. | in order to understand how the mammalian sensory cortex has been structured during evolution, it is necessary to compare data from different species across distinct mammalian lineages. here, we investigated the organization of the secondary somatosensory area (s2) in the agouti (dasyprocta aguti), a medium-sized amazonian rodent, using microelectrode mapping techniques and neurotracer injections. the topographic map obtained from multiunit electrophysiological recordings were correlated with bot ... | 2018 | 30692919 |
| understanding mammary activity in red-rumped agouti and implications for management and conservation of this neotropical game species. | the red-rumped agouti (dasyprocta leporina) produces precocial young and is the most hunted and farmed game species in several neotropical countries. an understanding of the reproductive biology, including the relationship between litter size and teat functionality is crucial for conservation management of this animal. in precocial mammals, as the red-rumped agouti, maintaining maternal contact to learn foraging patterns may be more important than the energy demands and nutritional constraints d ... | 2018 | 29995115 |
| suspected hypervitaminosis d in red-rumped agouti ( dasyprocta leporina) receiving a commercial rodent diet. | an 8 yr, intact male red-rumped agouti ( dasyprocta leporina) was evaluated for weight loss. examination revealed poor body condition, hypercalcemia, elevated serum 25-hydroxyvitamin d, metastatic calcification of soft tissues, and hyperechoic kidneys. the diet, formulated for laboratory rodents, contained elevated levels of vitamin d3. histopathology from a female conspecific that died 5 mo prior identified dystrophic mineralization and nephrosclerosis, suggestive of a vitamin d3 toxicity. the ... | 2018 | 29517453 |