This report contains information about sleeping dens, population structure and the impact of hunting of the paca (Cuniculus paca Linnaeus, 1766). It is based in sleeping den observations, transect censuses and hunt- ing records. We found that each sleeping den has one to three orifices for regular access and way out, one to four orifices for circumstantial escape, and an internal cavity for the diurnal sleep. Of the total sleeping dens inspected, 67% where located between 0 and 60 m from water bodies, but some were also found as far as 100 m away. Of the population extracted by hunters, 74% were adults and only 4% were infants. The annual hunting pressure was estimated at 0,4 individuals/ km2 and the population density for the overall area at 6,2 individuals/ km2. Finally, the harvest model suggests that hunting of the paca is sustainable in Alto Itaya river basin.

This report contains information about the diversity of mammals and preferences for habitat types in the upper Itaya river basin. For this purpose, censuses by transect were conducted and supplemented out censuses observations and with hunters interviews information. As a result of the study 48 species were recorded. Greater diversity was recorded in forest of heavily dissected low hill (Bcbfd). On the other hand, 20 species were shared among the three habitat types, while the highest similarity occurred between the forest of heavily dissected low hill (Bcbfd) and the forest of moderately dissected low hill (Bcbmd). Finally, the presence of indicator species as the primary community as Tapirus terrestris, Priodontes maximus, Lagothrix poeppigii and Tayassu pecari, indicate that the conservation status of wildlife in general is intermediate to high level.

This report deals with paca sleeping dens (Cuniculus paca Linnaeus, 1766). The study was conducted between August 2006 and April 2007 and is based on detailed observations. Results indicate that this rodent uses holes in the ground or in fallen trees as sleeping dens. Each of these sleeping dens had two or more orifices and an internal cavity for the "diurnal sleep”. Typically, one orifice was for common use and the rest for the circumstantial escape. According to their form, their localization in the ground, and the number and location of orifices, sleeping dens were classified into four types, of which type A was the most common. The results also indicate a greater concentration of sleeping dens in temporary flooded gallery forest.

This report contains information related to the diversity and hunting impact of the primates, as well as the potential threats for the populations that inhabit the upper Itaya river basin. It is based on census by transect and hunting records carried out in six communities. During the census 384 groups belonging to 9 were observed of the 11 species that inhabit the study area. Most records corresponded to Saddle-back tamarin (Saguinus fuscicollis Spix) with 25,3%, saki monkey (Pithecia aequatorialis Hershkovitz) with 20,6% and woolly monky (Lagothrix poeppigii Humboldt) with 15,9%. Population density was estimated for nine species, being the squirrel monkey (Saimiri sciureus Linnaeus) the most abundant with 18,2 individuals/km2, followed by woolly monkey (L. Poeppigii) with 15,5 individuals/km2 and saddle-back tamarin (S. fuscicollis) with 10,5 individuos/km2; the opposite occured in red...

This work report information about of the abundance, hunting pressure and hunting impact on mammal’s populations inhabits forests of the Alto Itaya river basin. Information was collected from censuses of transects and hunting records, carried out in six communities. The Woolly Monkey (Lagothrix poeppigii Schinz) was the most abundant with 15,4 individuals/km², while the red howler monkey (Alouatta seniculus Linnaeus) and the Red-brocket Deer (Mazama americana Erxleben) were the less abundant with 0,15 individuals/km² and 0,5 individuals/km2, respectively. On the other hand, the hunting records show an average annual harvest of 1176 mammals, equivalent to 14184,6 kg. Finally, the harvest model suggests over-hunting of tapir (Tapirus terrestris Linnaeus), White-lipped Peccary (Tayassu pecari Link), Woolly Monkey (L. poeppigii), Red Howler Monkey (A. seniculus) and Black Capuchin Monkey...

This paper reports on habitats, quantitative abundance and economic valorization of the wild fauna inhabiting the Algodon river basin. In this study we determinate the habitats, realized interviews to hunters and censuses along transects. Censuses were carried out in seven of the ten types of the distinguished habitats; 329 direct observations of mammals, birds and reptiles were made in these transects. Among the mammals, the White-lipped Peccary (Tayassu pecari Link) and the Woolly Monkey (Lagothrix lagotricha Humboldt) were the most abundant, with 9,8 individuals/km2, equivalent to 323,4 kg/km2 of biomass, and 18,4 individuals/km2, equivalent to 202,4 kg/km2 of biomass, respectively. In birds, the highest density corresponded to the Spix’s Guan (Penelope jacquacu Spix) with 5,4 individuals/km2, equivalent to 6,9 kg/km2 of biomass. Without taking in account nocturnal species and some ...

The study deals with the habitat, inter-especific associations, group size and population density of two Ateles species that inhabit the Pacaya Samiria National Reserve. Data were collected during inventories and transect censuses between january 1997 and february 1999, september — october 2000, august –- september 2002 and January 2003. On the left bank of the Río Samiria, Ateles balzebuth E. Geffroy and Ateles chamek Humboldt share the habitat forming mixed groups. Average group size for A. belzebuth was 5,1 individuals/group and for A. chamek 7,3 individuals/group. Estimated population density for A. belzebuth was 1,02 individuals/km2 and for A. chamek 0,51 individuals/km2 . We discuss and analyze the factors that may have influenced the drastic reduction of both populations.

This report contains information related to the game mammals that inhabit the palm swamps (aguajales) of the flooded forests of the Reserva Nacional Pacaya Samiria and their interrelation with the food plants. It is based on censuses by transects in aguajales of recent origin and semi-eutrophic aguajales. 24 species of game mammals were registered making uses of the aguajales; of them, the primates were the most representative and the great abundance in both aguajales types. Among the primates, the Squirrel monkey (Saimiri boliviensis E. Geoffroy & R. de Blainville) and the brown capuchin monkey (Cebus apella Linnaeus) were the most abundant in aguajales of recent origin (350 individuals/km2 and 90 individuals/km2 , respectively), while the white-fronted capuchin monkey (Cebus albifrons Humboldt) it was the most abundant in aguajal semi-eutrofizado (90 individuals/km2 ). In terms of ...

This paper provides information on the diversity, abundance and conservation status of primates species that inhabit the forests of the Sierras de Contamana. We recorded 87 groups corresponding to 11 species. Saguinus mystax Spix, Ateles chamek Humboldt, Cebus apella Linnaeus and Lagothrix poeppigii Schinz were the most frequently sighted with 14, 13, 13 and 11 groups, respectively. The variation of group size was similar to those of groups in other areas, except for A. chamek whose groups in most of the cases consisted of more than 16 individuals. In the study area, highest population were observed for Cacajao calvus ucayalii Thomas (479 individuals / 100 km), L. poeppigii (178,5 individuos/100 km) and A. chamek (148,2 individuos/100 km). Most sightings occurred in high terrace forests (46%) and low hill forests (27%), constituting the habitats most frequently used by primates. Among th...

Censuses by transects were carried out in January of the 2005 in the Aushiri river basin to determine the population density and population structure of the «golden-mantle tamarin» (Saguinus tripartitus MilneEduards). We recorded 17 groups and population density was calculated in 13,5 individuals/km2 . The size of the groups varied from four to eight individuals, with an average size of 5,3 individuals per group. The basic composition of a group was that of a reproductive pair with progeny of two to six individuals. The adults represented 75% of the total population.

This paper contains information about the hunting, abundance and the hunting impact of the mammals that inhabit the lowland forests of the area surrounding two communities in the interior of the Pacaya Samiria National Reserve. It is based on hunting records and transect censuses. Hunting records show an average annual harvest of 190,3 mammals in the San Miguel area, equivalent to 2,275,9 kg of bushmeat; and 104,5 mammals in the Parinari area, equivalent to 985,9 kg of bushmeat. Primates were abundant in both study areas; however, the estimated densities were much higher in the Parinari area. No ungulates species were observed in the San Miguel area, whilst in the Parinari area the density of tapir (Tapirus terrestris Linnaeus) was estimated at 0,2 individuals/ km2 and that of white lipped peccary (Tayassu pecari Link) at 6, 6 individuals/km2 . Finally, the harvest model suggests overhun...

Within the northeastern Peruvian Amazonia remain areas with scarce information on primates, one of them being the interfluvium between the Napo and Putumayo rivers. This lack of information motivated us to conduct a study to determine the diversity and abundance of primates within the area, as well as to identify the threats, which inhibit these primate species populations. For this purpose, we conducted transect censuses in three sampling sites in October 2007, September 2013 and November 2014. In 1040 km of transect walks we observed 308 groups of nine primate species, the most common being Leontocebus nigricollis (109 groups) and the rarest being Alouatta seniculus (16 groups). Smaller groups of Lagothrix lagothricha lagothricha (8-11 individuals) and A. seniculus (3-5 individuals) were observed in Tamboryacu, a majorly disturbed sampling site. Likewise, the lowest population densitie...

Lagothrix flavicauda is endemic and lives sympatrically with other primates in the montane forests of Amazonas, San Martín, La Libertad and Huánuco. Detailed information on its density and conservation status, as well as sites with healthy populations is lacking, except for Amazonas where most of the studies were carried out. In order to obtain information on the mentioned aspects, transect censuses were conducted between November and December of 2015, February to May of 2016, and between June and July of 2016 in six survey sites located in the regions of San Martín and Huánuco. As a result of the census, 49 groups belonging to 7 species were sighted, being L. flavicauda the most observed with 14 groups. The largest groups were observed in L. flavicauda (average 13.5±2.2 individuals) and Cebus yuracus (average 12.5±3.6 individuals) and the smallest in Alouatta seniculus (average 3....

In the montane forests of Los Chilchos five species of primates inhabit, whose current situation, group size and abundance are unknown, which are indispensable for the management and formulation and implementation of conservation measures. In order to obtain information on the mentioned aspects, censuses were conducted by linear transect between June and July 2017 in forests of low and high anthropic disturbance. As a result of the censuses, 63 groups belonging to 5 species were registered. Of these, 50 groups corresponded to low disturbance forests, being Aotus miconax and Ateles belzebuth the most observed with 21 and 17 groups, respectively. Larger groups were observed in Cebus yuracus (average 17.0 ± 5.0 individuals) and A. belzebuth (average 14.5 ± 7.2 individuals) and smaller in A. miconax (average 2.6 ± 0.7 individuals). With exception of Lagothrix flavicauda, the relative abun...

With the exception of the forests of the Itaya river basin, the area of influence of the Iquitos-Nauta highway and the middle basin of the Nanay and Tigre rivers, there is no information on the current status of Cheracebus sp. populations and habitat, which motivated this study. The objectives were aimed at obtaining more information on Cheracebus sp. and the state of its populations. Linear transect censuses were conducted from May to November 2019 in forests of the Itaya, Nanay and Tigre river basins. In 1659 km of covered length, 32 groups were sighted; of them, 17 corresponded to the Nanay river basin. Groups with four individuals were seen more frequently in the Nanay river basin; relative abundance and population density were slightly higher in the Itaya river basin with 0.3 groups/ 10 km and 4.2 individuals/ km2. In the study area, forests are highly disturbed from the banks of ri...

In this work, the larger mammals that inhabit the montane forests of the department of Huánuco are studied to determine the diversity of species and the status of their populations. Linear transect censuses and interviews were conducted between 2014 and 2015 on six sampling sites corresponding to five provinces. 439 records belonging to 37 species were obtained from the censuses and nocturnal explorations. Of these species, 4 are endemic to Peru and 9 are in some conservation category of Peruvian legislation. The most representative orders corresponded to carnivores and primates with 11 and 10 species, respectively, while the most frequent sightings were of Tremarctos ornatus (43 records), Nasua nasua (34 records) and Cuniculus paca (32 records). The Shannon-Wiener and Simpson Diversity Indices indicate Miraflores as the sampling site with the highest diversity (H'=3.11, 1-D=0.95). The ...

Este reporte contiene información acerca de los ambientes de dormir, estructura poblacional y el impacto de la caza del majas (Cuniculus paca Linnaeus, 1766). Está basado en observaciones de madrigueras, censos por transectos y registros de caza. Encontramos que cada ambiente de dormir tenía de uno a tres orificios para el acceso y salida, uno a cuatro orificios para la fuga circunstancial y una cavidad interna para el “sueño diurno”. Del total de ambientes examinados, 67% estaban localizados entre 0 y 60 m respecto a los cuerpos de agua, pero algunos también fueron encontrados más allá de los 100 m. De la población extraída por los cazadores, 74% fueron adultos y solamente 4% correspondieron a los infantes. La presión de caza anual fue estimada en 0,4 individuos/km2 y la densidad para el área en general en 6,2 individuos/km2. Finalmente, el modelo de cosecha indica que la...

This report contains information about the diversity of mammals and preferences for habitat types in the upper Itaya river basin. For this purpose, censuses by transect were conducted and supplemented out censuses observations and with hunters interviews information. As a result of the study 48 species were recorded. Greater diversity was recorded in forest of heavily dissected low hill (Bcbfd). On the other hand, 20 species were shared among the three habitat types, while the highest similarity occurred between the forest of heavily dissected low hill (Bcbfd) and the forest of moderately dissected low hill (Bcbmd). Finally, the presence of indicator species as the primary community as Tapirus terrestris, Priodontes maximus, Lagothrix poeppigii and Tayassu pecari, indicate that the conservation status of wildlife in general is intermediate to high level.

This report deals with paca sleeping dens (Cuniculus paca Linnaeus, 1766). The study was conducted between August 2006 and April 2007 and is based on detailed observations. Results indicate that this rodent uses holes in the ground or in fallen trees as sleeping dens. Each of these sleeping dens had two or more orifices and an internal cavity for the "diurnal sleep”. Typically, one orifice was for common use and the rest for the circumstantial escape. According to their form, their localization in the ground, and the number and location of orifices, sleeping dens were classified into four types, of which type A was the most common. The results also indicate a greater concentration of sleeping dens in temporary flooded gallery forest.

Este reporte contiene información relacionada a la diversidad e impacto de la caza de los primates, así como las amenazas potenciales para sus poblaciones que habitan en la cuenca del río Alto Itaya. Está basado en censos por transectos y registros de caza llevados a cabo en seis comunidades. Como resultado de los censos, fueron registrados 384 grupos pertenecientes a 9 de las 11 especies que habitan en el área de estudio, correspondiendo los mayores registros al pichico pardo (Saguinus fuscicollis Spix ) con 25,3%, huapo negro (Pithecia aequatorialis Hershkovitz) con 20,6% y mono choro (Lagothrix poeppigii Humboldt) con 15,9%. La densidad poblacional fue estimada para nueve especies, siendo Saimiri sciureus Linnaeus la más abundante con 18,2 individuos/km2, seguido por L. poeppigii con 15,5 individuos/km2 y S. fuscicollis con 10,5 individuos/ km2; lo contrario ocurrió en Alouatta...