Frederico Ozanan Barros Monteiro

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• Doctor of Philosophy
• Professor (Full) at Federal Rural University of Amazonia

Esta obra se ha desarrollado mediante la colaboración entre los miembros de la Unidad de Anatomía Veterinaria de la Universitat Autònoma de Barcelona (UAB), España, y del Área de Morfofisiología del Instituto de Salud y Producción Animal de la Universidad Federal Rural de la Amazonía (ISPA / UFRA), Belém, Pará, Brasil. La idea de elaborar este mate...

Esta obra foi desenvolvida mediante a parceria dos membros da Unidade de Anatomia Animal da Universidade Autônoma de Barcelona (UAB), Espanha e da Área de Morfofisiologia do Instituto da Saúde e Produção Animal da Universidade Federal Rural da Amazônia (ISPA / UFRA), Belém, Pará, Brasil. A ideia de elaborar este material educativo surgiu da necessi...

The COVID-19 pandemic triggered unparalleled political, economic, and social ramifcations, exacerbating global food insecurity (FI). To understand the overall impact of the pandemic and how diferent socio-economic groups were afected, we assessed prevalence and severity of FI in a sample of 18,997 households across seven countries in South America....

The COVID-19 pandemic triggered unparalleled political, economic, and social ramifications, exacerbating global food insecurity (FI). To understand the overall impact of the pandemic and how different socio-economic groups were affected, we assessed prevalence and severity of FI in a sample of 18,997 households across seven countries in South Ameri...

The COVID-19 pandemic triggered unparalleled political, economic, and social ramifications, exacerbating global food insecurity (FI). To understand the overall impact of the pandemic and how different socio-economic groups were affected, we assessed prevalence and severity of FI in a sample of 18,997 households across seven countries in South Ameri...

Este estudo objetiva traçar o perfil dos principais atendimentos e procedimentos realizados em uma clínica veterinária no município de Santana, Amapá, entre os anos de 2016 e 2023. Os dados, extraídos do programa da clínica, foram alocados em planilha e analisados em distribuições de frequência (padrões de ocorrência, médias e erro padrão). Foram r...

This study describes a detailed protocol for the capture and release of Araguaian river dolphins (Inia araguaiaensis) in the Tocantins River, Brazil, aiming to collect essential biological data for the research and conservation of the species. The methodology involved the use of a seine net to capture the animals, followed by the collection of biol...

The species Cuniculus paca is highly subject to predation, whether natural or anthropogenic, and the ability of species to withstand different levels of depredation depends directly on their reproductive dynamics. However, there is little literature on the developmental biology of this species, and so the aim of this paper was to describe the fetal...

The Neotropical (e. g., Aotus sp., Callithrix jacchus, Saguinus sp., Saimiri sp., and Sapajus sp.) primates are important models for biomedical research and studies on reproductive physiology and biotechnology. Consequently, studies about gynecological and obstetric ultrasonography are crucial. B-mode ultrasonography is a non-invasive imaging techn...

Malaria parasites are known to infect a variety of vertebrate hosts, including ungulates. However, ungulates of Amazonia have not been investigated. We report for the first time, the presence of parasite lineages closely related to Plasmodium odocoilei clade 1 and clade 2 in free-ranging South American red-brocket deer (Mazama americana; 44.4%, 4/9...

The ability of a species to withstand human impact depends on its life history characteristics, including social, ranging, and reproductive activity. The genera Lagothrix and Cacajao are more susceptible to anthropic action than small-sized primates due to their slower life histories, more restricted geographical ranges, and lower population densit...

Thirteen black agouti (Dasyprocta fuliginosa) male fetuses, acquired in two areas of the Amazon Forest, were used for the purpose of morphologically describing the fetal male urogenital organs with a focus on addressing histological and macroscopic aspects. The organs of interest were dissected and photographed in situ and ex situ. Fragments were c...

Background: Evaluation of blood parameters in captive non-human primates (NHPs) is crucial for monitoring their health and ensuring that their environment meets their physiological requirements. Methods: We performed hemogram, serum biochemistry, and parasitological exams in 20 howler monkeys and 21 capuchin monkeys. Results: In both species,...

This study describes the bone development during the intrauterine phase of the black agouti (Dasyprocta fuliginosa), discussing its relationship with the species’ adaptive strategies and comparing it with other precocial and altricial species. We analyzed 33 conceptuses (four embryos and twenty-nine fetuses) obtained through collaboration with loca...

Simple Summary Reproductive processes in Neotropical primates are still poorly understood. Complications arising in these processes may result in a compromised reproductive condition for a significant portion of these species. We evaluated the follicular atresia, cell proliferation, and anti-Mullerian hormone presence in two Neotropical primates, a...

Esta obra se ha desarrollado mediante la colaboración entre los miembros de la Unidad de Anatomía Veterinaria de la Universitat Autònoma de Barcelona (UAB), España, y del Área de Morfofisiología del Instituto de Salud y Producción Animal de la Universidad Federal Ru�ral de la Amazonía (ISPA / UFRA), Belém, Pará, Brasil. La idea de elaborar este m...

O Atlas que apresentamos em formato de livro eletrônico traz 325 imagens, sequenciadas e comentadas, que consideramos representativas da anatomia secional do cão. O trabalho abrange todas as regiões do corpo através dos diferentes planos anatômicos (transversal, sagital e dorsal), e visa aproximar o aluno do conhecimento e compreensão da anatomia t...

The study of fetal development allows for evaluating the different strategies adopted by mammal species to maximize neonatal survival. Autonomous locomotion is fundamental for newborns to perform foraging activities and increases newborn survival from predation. In this study, we assess the gestational bone development of 53 collared (CP, Pecari ta...

Background: Comparative studies of kidney morphophysiology in nonhuman primates can help us investigate interspecies differences in growth and aging patterns. Methods: We tested the effect of age and sex in renal morphophysiology in 21 Alouatta caraya and 21 Sapajus apella (age range = 0.5-26 years) by ultrasound, red blood cell (RBC) count, and...

O Atlas de Anatomia de Espécies Silvestres Amazônicas é uma obra dividida em tres volumes, devido à grande extensão de material gráfico que dispõe. Este segundo volume que apresentamos, traz uma breve descrição dos órgãos que pertencem ao aparelho respiratório, do coração, dos grandes vasos e do baço (com aproximadamente 315 imagens) de diferentes...

O Atlas de Anatomia de Espécies Silvestres Amazônicas é uma obra dividida em tres volumes, devido à grande extensão de material gráfico que dispõe. O terceiro volume, que apresentamos aqui, traz a descrição de órgãos pertencentes aos órgãos urinários, e órgãos reprodutivos femininos e masculinos (com aproximadamente 550 imagens) de diferentes espéc...

O Atlas de Anatomia de Espécies Silvestres Amazônicas é uma obra dividida em tres volumes, devido à grande extensão de material gráfico que dispõe. O primeiro volume, que apresentamos aqui, traz uma breve descrição taxonômica das espécies de mamíferos estudadas, e além, da descrição de órgãos pertencentes ao aparelho digestório (com aproximadamente...

El Atlas de Anatomía de Especies Silvestres de la Amazonía es una obra desarrollada por la Unidad de Anatomía Animal de la Facultad de Veterinaria de la Universitat Autònoma de Barcelona (UAB). El trabajo de campo se ha realizado en diversos lugares de la Amazonía peruana. La primera versión del Atlas se publicó en lengua castellana en forma de pág...

El Atlas de Anatomía de Especies Silvestres de la Amazonía es una obra desarrollada por la Unidad de Anatomía Animal de la Facultad de Veterinaria de la Universitat Autònoma de Barcelona (UAB) e FundAmazonia. El trabajo de campo se ha realizado en diversos lugares de la Amazonía peruana. La primera versión del Atlas se publicó en lengua castellana...

El Atlas de Anatomía de Especies Silvestres de la Amazonía es una obra desarrollada por la Unidad de Anatomía Animal de la Facultad de Veterinaria de la Universitat Autònoma de Barcelona (UAB). El trabajo de campo se ha realizado en diversos lugares de la Amazonía peruana. La primera versión del Atlas se publicó en lengua castellana en forma de pág...

The Spix's Saddleback Tamarin, Leontocebus fuscicollis is widely distributed across the Amazon region, but is endangered. This species is serving an important role in biomedical research in captivity. However, reference values for hematological and biochemical parameters are required for the proper characterization of the species. It was therefore...

Background Imaging diagnostic methods are essential for a complete understanding of the liver function and may aid in early detection of hepatic disorders. Methods Sixty-nine owl monkeys were grouped in three age groups (AG): AG1 (<2 years old, n = 14), 2 (2–6 years old, n = 21), and 3 (>7 years old, n = 34). The animals were evaluated by ultrasou...

The hormone dehydroepiandrosterone (DHEA) and its sulfate ester (DHEAS) are the most abundant circulating steroids in human and some nonhuman primates, and have been implicated in development, aging and in stress modulation. We aimed to validate a commercially available enzyme immunoassay kit to measure DHEAS in feces and serum of three platyrrhine...

Animal models enable research on biological phenomena with controlled interventions not possible or ethical in patients. Among species used as experimental models, squirrel monkeys ( Saimiri genus) are phylogenetically related to humans and are relatively easily managed in captivity. Quadrupedal locomotion of squirrel monkeys resembles most other q...

Studies related to morpho-physiology improve the understanding of biological mechanisms in non-human primates (NHP), contributing to research in several areas, especially those of assisted reproduction and biomedicine. The genera Aotus and Sapajus are important considerations in conducting studies related to reproductive biology and biomedical rese...

Background The classification of Saguinus ursulus as a new taxon and the vulnerability of this species highlighted the need for data on its specific morphophysiological attributes. This study used ultrasound to determine the typical characteristics of pelvic‐abdominal structures and organs. Methods Nine healthy primates of the species S. ursulus w...

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 alt...

Background: The maintenance of marmosets in captivity may trigger various disorders. The objective of this study was to provide a radiographic evaluation of the forelimbs and hind limbs of marmosets rescued from illegal wildlife trade and maintained in captivity. Methods: Fourteen marmosets were studied. Results and conclusions: Three marmoset...

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 6...

The callitrichids are non-human primates that feed on insects and plant matter in nature, but in captivity, they are fed mostly an artificial diet containing amounts of gluten, in their toxic forms in items such as wheat, barley and rye. The aim of this research was to estimate the blood β-defensin and Toll like receptor 5 (TLR5) gene expressions a...

The Brazilian Amazon is endemic for malaria and natural infections by Plasmodium spp. have been detected in Neotropical primates. Despite the diversity of primate species in the region, studies on infections by these agents are limited. The aim of the present study was to investigate the frequency of infection by Plasmodium vivax and P. falciparum...

The authors regret to inform that the formula of fetal growth presented in the article was incorrect, and that the formula ∛W = 0.077 (t - 29.80) should be used in future analyses. The authors would like to apologise for any inconvenience caused.

Genital organs from 33 nocturnal monkeys (Aotus namcymaae), 29 Poeppig's woolly monkeys (Lagothrix poeppigii), 21 red uakaris (Cacajao calvus) and 11 large-headed capuchins (Sapajus macrocephalus) were histologically analyzed in order to describe the endometrial changes related to the ovarian cycle. A. nancymaae and S. macrocephalus showed histolog...

The testicles are the primary sexual organs of male and their function is to produce sperm and sexual hormones. Disorders of the testicles are common in domestic cats. Therefore, detailed assessment of the testes is of great importance in veterinary medicine. Considering the recent advances in diagnostic imaging in companion animals, this review ai...

The aim of this study was to evaluate the stiffness of fetal lungs, liver, kidneys, and placentomes by acoustic radiation force impulse (ARFI) elastography in ovine and to correlate obtained findings with fetal development. Twenty‐four ewes were included and tissue stiffness of fetal lung, liver, kidney, and placentome were measured beginning with...

Background The common marmoset (Callithrix jacchus) is one of the most studied Neotropical primates regarding reproduction. However, little has been reported on the black‐tufted‐ear marmoset (Callithrix penicillata), which may produce fertile hybrids with other Callithrix. This is the first study to evaluate sperm freezing from black‐tufted‐ear mar...

With the advance of ultrasonic technology, new echocardiographic techniques have been developed and commonly used in veterinary medicine because it allows noninvasive, accurate, and reproducible evaluation. The aim of this study was evaluating the topography and echobiometric parameters of the heart in red-tailed boas raised in captivity. Biometric...

The aim of this study was to determine some radiographic reference values for hip joint, femur and patella in maned wolves. Ten maned wolves (Chrysocyon brachyurus), five live (G1) and five cadavers (G2), were used. There were no statistically significant differences in the radiological measurements between right and left pelvic limbs of the G1 and...

The intrauterine development is an evolutionary strategy that prepares the neonate for extra-uterine life, thus providing important information on the life history of species. In this study, we described the external and internal morphology of 25 fetuses of Poeppig's woolly monkeys (Lagothrix poeppigii) by taking advantage of a 10-year participator...

Objetivou-se avaliar as reações teciduais induzidas pela abraçadeira autoestática de náilon na oclusão dos pedículos ovarianos, por meio de avaliação macroscópica e histológica. Utilizaram-se 45 fêmeas caninas, sem raça definida, clinicamente sadias, com idade média de 31,11 ± 14,26 meses e peso médio de 11,26 ± 4,7 kg. Todas foram submetidas à ova...

In mammals, the embryonic and fetal development of a species has evolved to maximize neonatal survival. In this study, we use a sample of 132 embryos/fetuses of wild lowland paca (Cuniculus paca), obtained over a period of 15 years through collaborative methods with local hunters in the Amazon to describe the intrauterine development of external an...

This study aimed to identify yeasts from the gastrointestinal tract of scarlet ibises (Eudocimus ruber) and from plant material collected from the environment where they live. Then, the isolates phenotypically identified as Candida famata were submitted to molecular identification of their closely related species and evaluated for their antifungal...

Background: The combined use of renal biochemistry and ultrasonographic imaging may improve the correct management of renal disease. Although renal disease is frequently observed in nonhuman primates, renal function markers have not yet been studied in Squirrel monkeys (Saimiri collinsi). Objectives: The aim of this study was to establish normal...

The present study aimed at evaluating the role of captive scarlet ibises (Eudocimus ruber) and their environment as reservoirs of Aeromonas spp. and Plesiomonas spp., and analyzing the in vitro antimicrobial susceptibility and virulence of the recovered bacterial isolates. Thus, non-lactose and weak-lactose fermenting, oxidase positive Gram-negativ...

The aim of this study was to detect the infection by Trypanosoma cruzi in captive Neotropical primates in the Brazilian Amazon. From February 2013 to July 2014, 112 blood samples were collected from Neotropical primates from the Amazonas, Amapá, and Pará States, north of Brazil. The subjects belonged to the families Cebidae (N = 59), Atelidae (N =...

The aim of this study was to retrospectively assess a population of cats with long-bone fractures over a six year period. Data about cat signalment (breed, sex, age, body weight); domiciled or not; cause of injury; time of occurrence; injured limbs and fractured bones (humerus, radius/ulna, femur, tibia/fibula); soft-tissue damage (closed, open); a...

Although there are many studies about the cellular biomarkers’ use in canine’s mammary cancer, the results are not to compare. This paper offers orientations about the most useful immunohistochemical markers, which can help to treat canine’s mammal tumors. The main biomarkers of the canines’ mammal epithelia and of the myoepithelial cells were revi...

B-mode ultrasound employment in snakes is a challenge because the anatomy is differentiated in relation to birds and mammals. Thus, the present study aimed to describe the topography and ultrasonographic characteristics of the liver, gallbladder, spleen, kidneys, and conduct a comparison of measurements and biometric variables in snakes. Fifty-seve...

Em medicina veterinária, a função renal geralmente é avaliada por determinações séricas de ureia e creatinina. No entanto, estes marcadores mostram baixa sensibilidade para detecção precoce de insuficiência renal, sendo alterados quando grande parte da função renal está comprometida. Biomarcadores mais sensíveis têm sido utilizados, entre os quais...

Hematological and biochemistry values can be used to detect alterations caused by pathogenic agents and to establish differences between states of health and disease. The aim of this study was to perform hemogram and serum biochemistry examination in primates from the illegal captivity, considering the sex and body mass. Fifteen capuchin monkeys (S...

Background A prime concern of the gait analysis in a heterogeneous group of dogs is the potential influence of factors such as individual body size, body mass, type of gait, and velocity. Thus, this study aimed to evaluate in a heterogeneous group of dogs a possible correlation of the stride frequency with kinetic and temporospatial variables, as w...

In domestic cats, blood group AB consists of three blood types A, B and AB. A preliminary identification by typing technique is essential to minimize the occurrence of transfusion reactions and neonatal isoerythrolysis. Therefore, the aim of this study was to determine the frequency of blood types and estimate the probability of random transfusion...

In veterinary medicine, renal function is usually assessed through urea and creatinine determinations. However, these markers show poor sensitivity for early detection of renal failure by altering when most of the kidney function is compromised. More sensitive biomarkers have been used, among which stands out the cystatin C (CysC). However, for sev...

Anteater forelimbs are morphologically adapted to obtain food and to provide defense and locomotion. Four species are known, but there are few anatomical studies presenting the morphologic features of each species. The aim of this study was to describe the skeletal morphology of the giant anteater ( Myrmecophaga tridactyla ) forelimb. Pictures and...

Complete blood counts and blood biochemical analyses are laboratory tests that allow the monitoring of physiological condition, nutrition, and health in free-living or captive wild animals. When interpreting these tests, it is essential to compare the results with reference ranges that are suitable for the species. Few studies have been conducted o...

Background: The objective was to evaluate the procollagen type I N-propeptide (PINP), osteocalcin (OC), β-crosslaps (β-CTX), and parathyroid hormone (PTH) in relation to age and sex of Chlorocebus aethiops in captivity. Methods: Seventy-three monkeys were divided into four age groups: AG1 (juvenile); AG2 (young adult); AG3 (adult); and AG4 (seni...

O hemograma e o perfil bioquímico são usados para diagnosticar doenças em animais domésticos. Esses exames podem ser influenciados pela idade, sexo, nutrição, raça, espécie e condições ambientais. Portanto, dados de uma região não podem ser totalmente extrapolados para animais criados em regiões geograficamente distintas. Isso se aplica a ovinos cr...

The aim of this study was to evaluate the kinetic and temporospatial parameters of clinically healthy juvenile giant anteaters ( Myrmecophaga tridactyla ) by using a pressure-sensing walkway. Three free-ranging clinically healthy giant anteaters ( M. tridactyla ), two males and one female, aged 5-7 mo, were used. There was no statistically signific...

Ovarian function and morphology of owl monkeys (Aotus spp.) is inadequately known, but it is essential to describe this organ in detail to better understand reproductive patterns of the species. This study reports the anatomical and histological features of the ovaries from 41 owl monkeys, considering their reproductive status and parity. The corpo...

Background Studies on reproductive morphology are important to understand the reproductive cycle of non-human primates.Methods This study describes the functional morphology of the adult female tubular genital organs in 41 Aotus (12.8 ± 6.8 years old, ranging from 3 to 25 years), with respect to reproductive status and number of parturitions.Result...

This study aimed to assess possible deviations in mutation-drift equilibrium in bovine breeds. A total of 178 blood samples were collected from Curraleiro Pé-Duro, Tabapuã, Guzerat and Senepol breeds for DNA extraction and genotypic analysis by eleven microsatellite markers. The deviation loci number to mutation-drift equilibrium was 1 according to...

Objectives: To evaluate the influence on the kinetic and temporospatial parameters of calibration protocols with point and step techniques for a pressure-sensing walkway. Methods: Nine Labrador dogs were used. Two protocols of point calibration technique (C1 and C2) and eight protocols of step calibration technique (C3 to C10) were performed. In...

Resumo: O hemograma e as dosagens bioquímicas são exames rotineiramente utilizados na avaliação da saúde dos animais domésticos, incluindo os búfalos. Na região Amazônica pesquisas nessa temática ainda são escassas. Desta forma, o objetivo deste trabalho foi estabelecer intervalos de referência para hematologia e bioquímica sanguínea de Bubalus bub...

Complete blood cell count and biochemical testing are exams routinely used in assessing the health of domestic animals, including buffaloes. In the Amazon region, research on this subject is scarce. Thus, the aim of this study was to establish reference intervals for hematology and blood chemistry of Bubalus bubalis raised in eastern Amazon and eva...

Este estudo teve como objetivo avaliar o papel do camarão Macrobrachium amazonicum como carreador de Candida spp. do ambiente aquático, por meio da análise da correlação entre Candida spp. isoladas desse camarão e do seu ambiente (água de superfície e sedimento) através das técnicas de M13-PCR fingerprinting e RAPD-PCR. Para tanto, 27 cepas de Cand...

The effects of body biometrics on cardiac measurements and description of cardiac anatomy were performed in red-tailed boas (Boa constrictor constrictor) (n ¼ 29) using real-time B-mode ultrasonography. Statistical comparison of measured cardiac metrics according to sex and body measurements demonstrated no significant difference between sexes but...

Squirrel monkeys (genus Saimiri) are agile, arboreal primates that are seldom captured in the wild due to their small body size (<1 kg) and large, non‐cohesive social groups (40–50 individuals). However, longterm studies on these primates often require captures and permanent identification of individuals, in order to monitor their behavior and heal...

Background The aim of this study was to evaluate the goniometric measurements of the forelimb and hind limb joints in two species of Neotropical primates maintained in captivity.Methods Eighteen intact monkeys organized into two groups were studied: Group 1–9 brown howlers (Alouatta fusca), and Group 2–9 tufted capuchins (Sapajus apella).ResultsSig...

The owl monkeys have been widely used for research in malaria and cancer. However, few studies have focused on their reproductive biology, which limits the usage of biotechniques to enhance the reproductive fitness of this species. This study aimed to describe the gonad tissue in Aotus azarai infulatus. We used histological sections of 19 individua...

OBJECTIVES The objective of this study was to evaluate the behavior and the fecal steroid concentrations changes of A. belzebul that were monitored under an anthropic pressure, mainly sound noises, due to the implementation of a mining company in the National Forest in Amazonia. METHODOLOGY The study was conducted in the National Forest, Marabá-PA...

The studies on fecal steroid metabolites published with free-living primates are limited mainly by the difficulty in obtaining samples. A radioimmunoassay was used to measure the fecal steroid concentrations in Alouatta belzebul in the National Forest of Tapirape-Aquiri in Brazil. Androgens were significantly higher for the adult males from the Are...

Several factors may influence kinetic data measurements, including body conformation and body mass. In addition, gender differences in gait pattern have been observed in healthy humans. Therefore, the aim of this study was to compare the kinetic and temporospatial parameters in clinically healthy male and female cats using a pressure-sensitive walk...

Purpose: To evaluate in vitro ability the of three different biomaterials - purified hydroxyapatite, demineralized bone matrix and castor oil-based polyurethane - as biocompatible 3D scaffolds for canine bone marrow mesenchymal stem cell (MSC) intending bone tissue engineering. Methods: MSCs were isolated from canine bone marrow, characterized a...

Ultrasound (B-mode) was used to analyze follicular events in 12 trained female owl monkeys (Aotus azarai infulatus). The animals were examined every 48 hours for over 90 days to measure and map follicular growth in both ovaries and to measure (using Doppler velocimetry) local hemodynamic changes during the peri-ovulatory stage. There were 44 follic...

Background The aim of this study was to evaluate the stifle joints of little spotted cats in captivity using radiographic and CT studies. The hypothesis was that these animals would have meniscal mineralisation that could be detectable by imaging studies. Twelve intact little spotted cats (Leopardus tigrinus), 2 females and 10 males, aged from 1.5...