Cuniculus Paca Research Articles

Fetal bone development in the lowland paca (Cuniculus paca, Rodentia, Cuniculidae) determined using ultrasonography.

Studying the timing of the main events of embryonic and fetal development may clarify the strategies adopted by species to maximize neonatal survival and the consequences of these events for their life history. This study describes bone development during the fetal phase of the lowland paca (Cuniculus paca), comparing it with other precocial or altricial species, and its relationship with the species' adaptive strategies. A total of 102 embryos/fetuses obtained over the course of 17years through collaboration with local subsistence hunters in the Amazon were analyzed. Measurements of mineralization of the axial and appendicular skeletons were performed by ultrasonography using a 10-18-MHz linear transducer. The chronological order of occurrence of mineralization in relation to the total dorsal length (TDL) was: skull (TDL=4.1cm); vertebral bodies (TDL=4.6cm); scapula, humerus, radius, ulna, ilium, ischium, femur, tibia, and fibula (TDL=6.7cm); ribs (TDL=7.8cm); clavicle (TDL=8.5cm); metacarpi/metatarsi (TDL=11cm); phalanges (TDL=15cm); tarsus (TDL=18cm); patella (TDL=23cm); and carpus (TDL=27.2cm). Secondary ossification centers first appeared in the femoral distal epiphysis (TDL=16.6cm) and tibial proximal epiphysis (TDL=18.4cm). Advanced fetuses (TDL>30cm, 97% gestational period) presented mineralization in all primary and most secondary centers. Compared to other species, paca neonates have a well-developed skeletal system at birth, which is important for their independent postnatal locomotion. Our results may contribute to the monitoring of bone development in other wild species, helping us to understand their life history, and serving as parameters for comparisons between precocial and altricial mammals.

Relationship between coproparasitological and hematological examinations of Cuniculus paca in captivity

The objective of this study was to conduct coproparasitological examinations and hemoparasite investigations associated with a hemogram to evaluate the state of the parasitized animals before and after deworming, contribute to sanitary measures, and provide knowledge of Cuniculus paca hematological patterns. We performed these examinations in 20 animals aged between 2 and 10 years on different dates (day 0 and day 30) before and after deworming with a vermifuge based on albendazole + cobalt. The changes caused by endoparasites and hemoparasites were observed and whether there was a satisfactory effect on deworming was evaluated. Trichuris spp., Strongyloides spp., and non-sporulated Eimeria spp. oocytes were detected during the examinations. Trichuris spp. had the highest incidence. We found no hemoparasites in any blood smears. In the first sampling, the eosinophilia and leukocytosis in the hemogram indicated parasitism in the animals. In the second sampling, the number of eosinophils decreased and the number of eggs and oocysts nearly disappeared in the coproparasitological examinations. The vermifuge showed an acceptable effect on sanitary management, and the hemogram was consistent with animal hygiene.

Perception of subsistence hunters in Lower Madeira on the impact of the Santo Antônio Hydroelectric Power Plant

Brazil has one of the highest levels of biodiversity in the world, much of which is located in the Amazon region. The populations inhabiting this region guarantee their livelihood with natural resources, among which hunting stands out. The purpose of this study was to conduct a survey on the impacts caused by the Santo Antônio Hydroelectric Power Plant (HPP) to subsistence hunting downstream in Madeira River, Porto Velho-Rondônia. Interviews were conducted in eight communities downstream of the Santo Antônio HPP: São Carlos, Brasileira, Curicacas, Cuniã, Cavalcante, Agrovila, Nazaré, and Terra Caída. Data were collected through semi-structured questionnaires, from June to October 2019. Thirty-two hunters older than 18 were interviewed: 31 males and one female. Ten species were recorded: seven mammals, two birds, and one reptile. In relation to mammals, the species with the highest number of citations was Cuniculus paca, which was also the most cited hunting species among the three classes. The hunters’ preference for mammals is related to the availability and volume (quantity) of meat. These species have a long life cycle, with low demographic densities and relatively low reproductive capacities, making them more sensitive to unrestrained or irrational hunting. During the research, a reported decrease in abundance was recorded for eight of the ten species mentioned after the construction of the dam. The information collected in this study confirmed that the construction of the Santo Antônio HPP contributed directly to the decrease in abundance of target species, impairing subsistence hunting in the evaluated communities.

Uses of wild vertebrates in traditional medicine by farmers in the region surrounding the Serra do Conduru State Park (Bahia, Brazil)

Abstract: Wild and domestic animals and their by-products are important ingredients in the preparation of medicines traditionally used in folk medicine, present in various human cultures since antiquity. However, the decline in the number of species in neotropical regions as a result of hunting for various purposes, including food, medicine and magico-religious use, has placed some species - especially endemic species - at risk of extinction. In this context, the present study aimed to identify the wild vertebrate species used in folk medicine in five communities in the region surrounding the Serra do Conduru State Park (PESC), Bahia, Brazil. Forty-five hunter-farmers were interviewed, citing 23 species, from which 17 raw materials are extracted for prevention and/or treatment of 19 illnesses. Mammals were the most cited taxon followed by birds and reptiles. Among the species mentioned, Cuniculus paca is the most used for zootherapy purposes, followed by Salvator merianae and Sphiggurus insidiosus. There was dissimilarity between the communities in relation to the diversity of species used for zootherapy. Ten categories of body systems were classified for which the therapeutic resources are recommended. Disorders related to the middle and inner ear were the most cited. Some of the species mentioned are endangered, such as Bradypus torquatus and Lachesis muta. This research demonstrated that zootherapy is a traditional practice embedded in these communities. Further studies are needed to broaden knowledge of other species that may have important cultural value for these families, as well as to evaluate the potential implications of the uncontrolled use of these species in traditional medicine in an ecological context, since the practice of zootherapy can excerpt pressure on critical animal populations and threaten biodiversity.

Hunting in a community of waste pickers of recyclable materials in Rondônia, Brazil

Hunting is an activity linked to the evolution of humans as a species. Hunting is the main source of protein for the Amazonian caboclo that guarantees the survival and subsistence of their population. Although there are several studies focusing on hunting in the Amazon, little is known about hunting in peri-urban regions. This work aimed to analyze the profile of hunters from the community of Vila Princesa, Porto Velho, Rondônia, which is located at km 10 of the BR-364 highway towards Rio Branco (AC). Data were collected by interviewing fourteen hunters through semi-structured questionnaires. Hunting was found to be a predominantly masculine activity, carried out for subsistence and taste, as well as for sport and trade. 19 game species were recorded, including mammals, birds and reptiles, with mammals being the most exploited group. The species of highest preference were Cuniculus paca, Tayassu pecari and Mazama americana, because of their palatability. In this study, it was also observed that animal by-products were used for medicinal purposes. The interviewees highlighted five hunting strategies: waiting game in fruit tree, waiting with barley, persistence hunting with canoe, persistence hunting with dog, and persistence hunting on foot; waiting game in fruit tree was the strategy with the highest number of records among the hunters of the community.

Relative abundances of medium and large mammals in the Cueva de Los Guácharos National Park (Huila, Colombia)

Abstract: Medium and large mammals are greatly affected by human activities, such as, habitat loss and hunting. In Colombia, these pressures have been most extensive in the dry and Andean forests. However, there is scare information available on the presence or abundance of these organisms for monitoring purposes. This study used photo-trapping cameras to determine the relative abundances of medium and large mammals in a mountain forest in the National Natural Park “Cueva de los Guacharos”, Huila (Colombia). Additionally, we examined whether trail use by humans could affect the distribution of these organisms. The cameras were located every 500 meters along the trails in strategic locations. We obtained the relative abundance of 11 species, being medium-sized mammals the most frequent (Cuniculus paca, Dasyprocta punctata and Mazama rufina). We recorded the presence of mountain tapir (Tapirus pinchaque), dwarf red brocket (Mazama rufina) and oncilla (Leopardus tigrinus), which are found in a high threat category according to the IUCN. Activity patterns were reported for 4 different species including daytime, nocturnal and cathemeral activities. Finally, we concluded that large mammals avoided trails of frequent use, and although the relative abundance of mammals is not very high, this National Park is still supporting relevant biodiversity.

Visceral infection by Porocephalus spp. (Pentastomida) in Neotropical wild mammals.

Larval stages of pentastomids were collected from different organs of small mammals from the Peruvian Amazon. These parasitized mammals included: a western Amazonian oryzomys (Hylaeamys perenensis), an elegant oryzomys (Euryoryzomys nitidus), a lowland paca (Cuniculus paca), two kinkajous (Potos flavus), two silvery woolly monkeys (Lagothrix poeppigii) and a brown-mantled tamarin (Leontocebus fuscicollis). Pentastomids were found in the mesentery and parenchyma of the liver and lungs of these animals. All pentastomids were morphologically identified as nymphs of Porocephalus spp. Only the nymphs collected from select animals (the western Amazonian oryzomys, the elegant oryzomys and the brown-mantled tamarin) were analysed molecularly. Molecular analysis was performed amplifying the mitochondrial cytochrome c oxidase subunit I gene from select nymphs collected from the western Amazonian oryzomys, the elegant oryzomys and the brown-mantled tamarin. The nucleotide sequences exhibited 95.8-97.7% similarity between them. Also, these sequences showed an identity of 95.8-97.9% to Porocephalus crotali (GenBank accession numbers MG559647-MG559655). Molecular analysis indicated the presence of at least two Porocephalus species. These findings represent the first record of Porocephalus in these mammals, thus adding new intermediate hosts for this pentastomid genus. This work represents the first molecular data of Porocephalus in a Neotropical climate.

Identifying Wildlife Corridors Using Local Knowledge and Occupancy Methods along the San Buenaventura-Ixiamas Road, La Paz, Bolivia

In 2013, we conducted a baseline study on the presence, distribution and occupancy of medium- to large-sized mammals in Bolivia along the San Buenaventura-Ixiamas road that runs parallel to the Madidi National Park and Natural Area of Integrated Management boundary and cuts through the Tacana Indigenous Territory and a number of neighboring private properties. Establishing a 3 km buffer on each side of the road, we studied an 865 km2 area divided into 1 km2 cells and sampled a total of 356 of these cells. In each cell, we established one 300 m transect divided into 25 m sections and registered wildlife sign, mainly footprints, from eight wildlife species or species groups. The transects were placed either along streams (75% of cells) or within forest (25% of cells). Using single-season single-species occupancy models we estimated occupancy (ψ) for Tapirus terrestris (ψ = 0.39), Pecari tajacu (ψ = 0.5), Mazama americana (ψ = 0.56), Dasyprocta spp. (ψ = 0.59), Cuniculus paca (ψ = 0.56), Leopardus spp. (ψ = 0.33), and use for Tayassu pecari (ψ = 0.17) and Panthera onca (ψ = 0.11). Occupancy and use results verified community perceived wildlife corridors between Madidi and its area of influence. We identified additional corridors along many streams crossing the San Buenaventura-Ixiamas road. This connectivity is not only important for wildlife, but also from a food security perspective for the indigenous communities that depend on wildlife as an important source of protein. The results will be used to mitigate the impact of road improvements through the identification of priority areas for maintaining connectivity between Madidi and the surrounding landscape.

Reporte de rabia en Tepezcuintles Cuniculus paca (syn. Agouti paca) en cautiverio en Yucatán

The objective of this case study is to report the presence of rabies in three Cuniculus paca specimens, of kept in captivity, in Yucatan, Mexico. The specimens’ clinical signs were recorded before the death of each one, the brain was collected and sent to a certified animal pathology laboratory, to detect the Lyssavirus nucleoprotein by the immunofluorescence technique. The clinical picture of each of the affected specimens was described. The results showed positivity to the immune reaction.

Noteworthy records of jaguar (Panthera onca), tayra (Eira barbara), and paca (Cuniculus paca) from southern Mexico

Noteworthy records of jaguar (Panthera onca), tayra (Eira barbara), and paca (Cuniculus paca) from southern Mexico

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 descriptions of the parasites present, the majority of publications failed to note the effect of them on the animals. Most information is available on endoparasites of capybara, while the endoparasites of the red brocket deer were the least reported. The manicou was reported to have had the most number of endoparasites, 44 species of parasites were reported, while there were only 24 endoparasites reported in the lappe. The most common parasites found in these neotropical animals were Paraspidodera uncinata, Strongyloides spp., Eimeria spp., Moniezia benedeni, Trichuris spp., Physocephalus spp., and Giardia spp. A large majority of the studies concluded that these animals were reservoirs for parasites that could affect domesticated livestock. Endoparasites of zoonotic significance were Echinoccocus spp., Trichuris spp., Giardia spp., and Cryptosporidium spp.

Hematological and biochemical parameters in Spotted Paca (Cuniculus paca) undergoing pharmacological restraint and general anesthesia

ABSTRACT The aim of this study was to assess the effects of chemical restraint, general anesthesia and opioid treatment on hematological components in Cuniculus paca. Eight healthy, adult, captivity female animals , underwent three laparoscopic procedures with a 15-day interval were evaluated. After physical restraint, an association of ketamine (25mg/kg) and midazolam (0.5mg/kg) was administered intramuscularly for chemical restraint. Posteriorly, anesthesia was induced and maintained with isoflurane; and randomly administered methadone (0.5mg/kg), tramadol (5mg/kg) or saline-placebo (0,1mL/kg) intramuscularly. After pharmacological restraint and in the final laparoscopy stage, venous blood samples were obtained for complete blood count, total plasma protein (TP), creatinine, alanine aminotransferase (ALT), sodium, potassium, chloride and ionized calcium analysis. During general anesthesia, hemoglobin, TP concentration and lymphocytes decreased (P=0.029; <0.001; 0.022 respectively), whereas the potassium levels increased (P=0.034). In conclusion, chemical restraint with ketamine/midazolam association causes a slight decrease in blood cellular components. Isoflurane anesthesia for laparoscopic procedure lead to decrease in hemoglobin, lymphocytes and protein concentrations, while potassium increased, without any influence from the tramadol or methadone treatment. However, these alterations were transient, and its hematologic values can collaborate in carrying out epidemiological, pathophysiological or case studies in the Cuniculus paca.

Activity patterns of terrestrial frugivorous mammals in a Mexican Neotropical forest

Fruits reaching the floor of tropical forests constitute an attractive resource for a variety of mammals. Study of the characteristics of the frugivory interaction can help to advance in the understanding of the mechanisms favoring animal’s coexistence. However, there are few studies focused on analyzing patterns of activity of mammals feeding on fruits in the forest floor. Camera traps were used to record consumption of Licania platypus and Pouteria sapota fruits by Cuniculus paca, Dasyprocta punctata, Nasua narica, Dycotiles crassus and Tapirella bairdii. Patterns of mammal activity were characterized based on the day, time and tree in which they were recorded. Overlap in daily (delta coefficient) and spatial occurrence (same tree and day, Jaccard, Ochiai indices and V ratio) was assessed. High segregation in the activity of frugivores occurred during the day (mean 0.291 and 0.191 for L. platypus and P. sapota, respectively) and among trees/days (max. Jaccard = 0.14 and 0.19 for L. platypus and P. sapota, respectively). Our results suggest that activity overlap among mammalian frugivores feeding in the forest floor is lower than expected. This likely relates to the fact we conducted our analysis at a finer detail than previous studies (for example those focusing exclusively on dietary overlap). Thus, our study increases our understanding of the possible factor that can favor coexistence of tropical frugivorous mammals.

Age at sexual maturity, first parturition and reproductive senescence in wild lowland pacas (Cuniculus paca): Implications for harvest sustainability

Generation length (GL) of a mammal, calculated through the age at sexual maturity, first reproduction and reproductive senescence can be used to assess the capacity of a population of a species to withstand differing amounts of hunting pressure by humans without depletion of animal numbers. Due to the lack of reproductive data for wild mammals, the GL is often difficult to determine for most species. In the present study, the GL parameters were assessed for the wild lowland paca (Cuniculus paca) from a sample of 119 female genitalia obtained during a 15-year hunter participatory program in the Amazon. The probability of female pacas being sexually active, with observable ovarian functionality or pregnancy, increased as both body and genitalia masses increased. The average body mass at puberty was 5.46 kg. Puberty was estimated to occur at 4 months of age, from which there was estimation when age at first parturition would occur 9 months after birth. Additionally, there was no indication that there was a decrease in parturition rate at more advanced ages. The estimated age of first reproduction for pacas was much less than previous estimates, most from assessments of captive animals. In addition, because there was no evidence of reproductive senescence, it is suggested that the average age of mature hunted pacas should be used to determine optimal harvesting rates of pacas by humans. The present study highlights the importance of in situ studies on reproduction of animals in their natural habitat because these will yield more accurate reproductive variable estimates than those obtained from captive animals. It is suggested that similar methods be used to accurately assess reproductive parameters of other tropical species that are hunted by humans.

Medium- and large-sized mammals in forest remnants of the southern Cerrado: diversity and ecology

Here we present a complete data set on the richness of medium- and large- sized mammals from a fragmented area of the southern Brazilian savanna (Cerrado). We described the frequency, occurrence status and activity period of the most common species. In each remnant, the community of medium- and large-sized mammals was inventoried across the following methods: tracks/prints, vocalizations, sightings, burrows, and camera trap images between August 2016 and January 2017. We recorded 23 species of medium- and large-sized mammals, of which seven are threatened. The study area presented a great potential, where we recorded 45.1% of all medium- and large-sized mammal species occurring in the Cerrado. Myrmecophaga tridactyla, Dasypus novemcinctus, Tapirus terrestris, Cerdocyon thous and Cuniculus paca were classified as common, which was expected since they have large habitat range, and therefore, can be recorded more frequently. Species with large body size, such as T. terrestris, M. tridactyla and C. thous, were also the ones with the greatest variation in time period of activity, occurring both in nocturnal and diurnal time periods. Therefore, our study underscores that this transition area, although fragmented, still maintains an expressive fauna of medium- and large-sized mammals, including endangered species.

Spatiotemporal ecology of two Neotropical herbivorous mammals

On this study, we used camera traps in a Semi deciduous Seasonal Forest, northeast of Brazil, to estimate the frequencies of occurrence of two Neotropical herbivorous mammals: the spotted paca (Cuniculus paca) and the tapeti (Sylvilagus brasiliensis), analyzing their seasonal variations of spatial distribution. We also characterized the activity pattern of the species and their seasonal variation. The herbivorous frequencies of occurrence were constant during all the seasons. In general, both species were mostly active at night. However, between the rainy and dry season, we identified differences in spotted paca activity peaks. Here we present one of the first studies on the tapeti, whose ecology is understudied. Our results also show a general view of the spotted paca and tapeti behavior strategies to seasonal variations. Due to the scarce food resource in the dry season, possibly these herbivorous need to search for different kinds of food available IFS around.

Uso da caça de subsistência no assentamento santa luzia, Cruzeiro do sul, Acre

In Amazon, native fauna is considered the major source of animal protein consumed by rural populations and traditional people. The main cinegetic species used by these communities stand out: large mammals (ungulates: white-lipped peccary, deer and tapir; primates and rodents such as pacas and agoutis), avifauna (curassows, jacamins, jacus and nambus) and the reptiles (chelonians). The present study characterizes the use of subsistence hunting by rural dwellers at Santa Luzia settlement, in Cruzeiro do Sul, Acre. The data collection was made by semi-structured questionnaire, composed of closed and open-ended questions, a total of 101 families were interviewed. About 163 animals where slaughtered each month at the study area, totaling approximately 1.400 animals slaughtered annually. Were pointed out 11 species of cinegetic use, among them, the armadillo (Dasypus novemcinctus), jacu (Opisthocomus hoazin), paca (Cuniculus paca) and the deer (Mazama sp.) are the most targeted for hunting in the locality, having the major acceptance by hunters. The technique of hunting on the spot is the most used by hunters followed by hunting with dogs. Nowadays, the time spent in the hunt is around 6 to 16 hours to obtain an animal. Deeper studies about understanding the pressure of hunting over these species become highly important to their maintenance and conservation on site.

Richness, diversity, and factors influencing occupancy of mammal communities across human-modified landscapes in Colombia

As human-modified landscapes are increasing in the tropics, it becomes critical to understand how they affect mammal communities to reconcile conservation and development. We combined land cover information and camera-trapping data to explore the effects of agricultural expansion on mammals in the Magdalena river valley of Colombia. We estimated species diversity, evenness, and dominance across two agricultural landscapes, modified by cattle ranching and oil palm cultivation. We further assessed which variables influence species- and community-level occupancy using multi-species occupancy models. Results highlight that modified landscapes display lower species richness, diversity and evenness, and higher dominance than more pristine sites. Residual forest cover and distance to water had significant effect on community occupancy (positive and negative respectively). Forests were particularly important for pumas, ocelots, lowland pacas, Central American agoutis, and crab-eating raccoons while wetlands had a positive effect on jaguars, the apex predator in the region. The influence of anthropogenic pressure was not clearly evident, though pastures were not valuable habitats for any mammal species, as they had a negative, yet not significant, effect on species and community occupancy. In light of rapidly expanding agriculture across the tropics, our findings highlight species-specific responses to disturbance that can inform land use planning and conservation policies. We stress the conservation value of forest and wetland habitat to mammal occupancy in heterogeneous ecosystems. Moreover, our results demonstrate that oil palm and crop expansion should target existing pastures, which displayed limited conservation value for Neotropical mammals but occupy vast swathes of land across Latin America.

Cardiovascular assessment in Female Spotted Paca ( Cuniculus paca )

ABSTRACT Aiming to provide cardiovascular morphophysiology information on the Cuniculus paca, an important neotropical rodent, eight healthy adult females of this species were evaluated three times by echocardiography under general anesthesia with isoflurane every 15 days. The exams were performed by a single experienced evaluator with the animals positioned in right and left decubitus. Posteriorly, two expert evaluators measured the cardiac chambers, walls and flow patterns, by B-mode, M-mode, and Doppler ultrasonography. The resulting values were compared among evaluators and periods by the Bland-Altman agreement test and several descriptive statistics were presented for each parameter. Echocardiographic images were obtained between the second and fifth left and right intercostal spaces, enabling the measurement of heart chambers and walls, mitral, tricuspid, aortic and pulmonary valves blood flows, and the ejection and shortening fractions calculation. None of the studied variables showed inter-observers or inter-periods variations. This study provided some normal echocardiographic variables, applicable to epidemiological, pathophysiological or case studies in the Cuniculus paca and phylogenetically close species.

Analysis and trends of photo-trapping in Mexico: text mining in R

This paper gathers published studies that used photo-trapping as the primary or supplementary method to obtain data on mammal and bird species in Mexico. The aim is to determine temporal trends, scientific journals, species, research groups, regions, and key topics investigated using this technology. A secondary objective of this paper was to illustrate the usefulness of text mining tools to analyze and summarize relatively large amounts of information. Papers about photo-trapping in Mexico published in specialized journals and books from 1998 to 2017 were compiled from Google Scholar and processed with various packages in R. A total of 188 papers about photo-trapping in Mexico were compiled, with 88.2 % published in 50 journals over the past seven years. The main journals were Therya, Revista Mexicana de Biodiversidad, Acta Zoologica Mexicana (New Series) and Revista de Biologia Tropical. The articles identified were written by 406 co-authors, 28 of whom contributed with 32.4 % of the papers published. A total of 40 species were reported in the title and abstract of these papers; the most frequent species were Panthera onca, Leopardus pardalis, Puma concolor, Tapirus bairdii, Tayassu pecari, Odocoileus virginianus , and Cuniculus paca . Oaxaca, Campeche, Sonora, Chiapas, Guanajuato, and Puebla were the main states where studies were conducted; in particular, most of them were carried out within Biosphere Reserves. Major research topics comprised records that broaden the distribution range, estimates of relative abundance and density, analysis of activity patterns, ecological interactions between species, and use of photo-trapping data as supplementary information to elaborate inventories of species. The analysis of text mining clearly indicates a trend towards an increasing use of photo-trapping in Mexico. Felines, ungulates and various species of the order Carnivora are main subjects of study. Photo-trapping has been used to explore a number of aspects of the biology of animal species. A large number of studies have been carried out in southeastern Mexico. The use of text mining techniques is a practical approach to analyze large volumes of data.