scholarly journals Abundancia relativa, estructura poblacional, preferencia de hábitat y patrones de actividad del Tapir Centroamericano Tapirus bairdii (Perissodactyla: Tapiridae), en la Selva de Los Chimalapas, Oaxaca, México

2014 ◽  
Vol 62 (4) ◽  
pp. 1407 ◽  
Author(s):  
Iván Lira-Torres ◽  
Miguel Briones-Salas ◽  
Gerardo Sánchez-Rojas
Keyword(s):  
Population Structure ◽  
Relative Abundance ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Activity Patterns ◽  
Habitat Preferences ◽  
Camera Traps ◽  
Quintana Roo ◽  
Invasive Technique ◽  
Sampling Effort

Baird’s tapir (<em>Tapirus bairdii</em>) is endangered primarily because of habitat loss and fragmentation, and overhunting throughout its distribution range. One of the priority land areas for the conservation of this species is the Northern part of its range in the Chimalapas forest, Oaxaca. The aim of this research was to determine the relative abundance, population structure, habitat preferences and activity patterns of Baird´s tapir (<em>Tapirus bairdii</em>) in the Chimalapas forest, Oaxaca, Mexico, through the non-invasive technique of camera-trap sampling. A total of five sampling sessions were undertaken among 2009-2013, and used a total of 30 camera-traps in each period. The determinant factor of the sampling design was the hunting between two study areas. A total sampling effort of 9 000 trap-days allowed to estimate an index of relative abundance (IRA) of 6.77 tapir photographs/1 000 trap-days (n=61). IRA varied significantly between sampling stations (Mann-Whitney, p&lt;0.01). The frequency of Baird´s tapir photos was higher in the dry season in tropical rain forest without hunting (<em>x</em>², p&lt;0.5). In the rainy season, the tropical rain forest and secondary vegetation habitats showed higher photo frequency than expected from random (<em>x</em>², p&lt;0.5). Considering population structure, a 95.08% of adult animals was obtained in photographic records (n=58). Three types of activity pattern were observed, with more nocturnal records (88.33%; Kruskal-Wallis, p&lt;0.05). The Chimalapas forest appears to be the second most important terrestrial priority ecoregion, just after the Mayan Forest (Campeche, Chiapas, Quintana Roo), for the conservation of tapir populations, not only for Mexico but also for Central America.

Relative abundance and activity patterns of terrestrial carnivorous mammals in Península Valdés, Patagonia, Argentina

Mammalia ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Romina L. D’Agostino ◽  
Daniel E. Udrizar Sauthier
Keyword(s):  
Plant Communities ◽  
Relative Abundance ◽  
Puma Concolor ◽  
Activity Patterns ◽  
Camera Traps ◽  
Sampling Effort ◽  
Population Parameters ◽  
Sampling Area ◽  
Independent Events ◽  
Wildlife Reserve

AbstractThe purpose of this study was to assess the relative abundance and activity patterns of terrestrial carnivorous mammals living in San Pablo de Valdés Wildlife Reserve, which is located in Península Valdés (PV), Chubut province, Argentina. To this end, camera traps were placed in different plant communities of this reserve and they were used from January 2015 to December 2016. A total of 256 independent events, with a sampling effort of 1811 camera nights, were obtained. The following species were identified in order of relative abundance: Conepatus chinga, Lycalopex gymnocercus, Leopardus geoffroyi, Puma concolor, and Leopardus colocolo, and the activity patterns of the first three were estimated. Those of P. concolor and L. colocolo could not be estimated as insufficient independent events were obtained. Our results show a cathemeral activity pattern in C. chinga and L. geoffroyi and a more nocturnal pattern in L. gymnocercus. Our results highlight the need to expand the sampling area to obtain further details on the behavioral patterns and population parameters of the carnivores identified. Knowledge of ecological issues, such as relative abundance and activity patterns of carnivorous mammals, is imperative to formulate monitoring and conservation programs.

Activity patterns in sympatric carnivores in the Nahuelbuta Mountain Range, southern-central Chile

Mammalia ◽  
2017 ◽  
Vol 81 (5) ◽  
Author(s):  
Alfredo H. Zúñiga ◽  
Jaime E. Jiménez ◽  
Pablo Ramírez de Arellano
Keyword(s):  
Species Interactions ◽  
Activity Patterns ◽  
Point Of View ◽  
Camera Traps ◽  
Sampling Effort ◽  
Mountain Range ◽  
Central Chile ◽  
Biological Communities ◽  
Southern Central ◽  
Sympatric Carnivores

AbstractSpecies interactions determine the structure of biological communities. In particular, interference behavior is critical as dominant species can displace subordinate species depending on local ecological conditions. In carnivores, the outcome of interference may have important consequences from the point of view of conservation, especially when vulnerable species are the ones suffering displacement. Using 24 baited camera traps and a sampling effort of 2821 trap nights, we examined the activity patterns and spatial overlap of an assemblage of five sympatric carnivores in the Nahuelbuta Mountain Range, in southern-central Chile. In this forested landscape we found predominantly nocturnal activity in all species, but not for the puma (

scholarly journals Monitoring program for mammals in a protected area of Colombia

2017 ◽  
Vol 22 (1) ◽  
pp. 9
Author(s):  
Germán Jiménez ◽  
Natalia López-Cepeda ◽  
Andrea Delgado ◽  
Ana María Guevara ◽  
Laura Lozano
Keyword(s):  
Activity Patterns ◽  
Monitoring Program ◽  
Camera Traps ◽  
Domestic Dogs ◽  
Sampling Effort ◽  
Wild Mammals ◽  
First Semester ◽  
Independent Events ◽  
Set Up ◽  
The Impact

<p>Between the second semester of 2009 and the first semester of 2011, camera traps were set up in conserved and disturbed habitats in the Otún Quimbaya Flora and Fauna Sanctuary. From a sampling effort of 2,066 camera-days, 673 photographs of 157 independent events were obtained for eight species of wild mammals and a domestic one. Their activity patterns were mainly nocturnal even for those species reported as diurnal. The impact of human interference and exotic species was evident for two species: <em>Tapirus pinchaque</em> and <em>Cerdocyon thous</em>. The former was observed below its altitudinal range with activity patterns mainly crepuscular and nocturnal. The second was observed in the same habitats where domestic dogs were found, with activity patterns mainly crepuscular and nocturnal. These findings suggest that both species have altered their activity patterns. Actions must be focused on decreasing the interaction of these mammals with humans and domestic dogs.</p>

scholarly journals Activity patterns of arboreal mammals in a tropical rain forest in México

Therya ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 225-231
Author(s):  
Alberto Astiazarán Azcarraga ◽  
Sonia Gallina Tessaro ◽  
Christian Alejandro Delfin-Alfonso
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Activity Patterns

scholarly journals MAMÍFEROS CARNÍVOROS DEL PARQUE NACIONAL LAGUNAS DE CHACAHUA, OAXACA, MÉXICO: RIQUEZA, ABUNDANCIA Y PATRONES DE ACTIVIDAD

2015 ◽  
Vol 5 (2) ◽  
pp. 39
Author(s):  
Alejandra Buenrostro-Silva ◽  
Daniela Sigüenza Pérez ◽  
Jesús García-Grajales
Keyword(s):  
Activity Patterns ◽  
Camera Traps ◽  
Didelphis Virginiana ◽  
Sampling Effort ◽  
Potential Prey ◽  
Urocyon Cinereoargenteus ◽  
Dasypus Novemcinctus ◽  
Mammal Species ◽  
Nasua Narica ◽  
Reptile Species

RESUMENLos mamíferos carnívoros desempeñan un rol importante en la estructura de las comunidades; sin embargo, los estudios sobre este grupo son complicados debido a sus estilos de vida, por lo que aún existen vacíos de información biológica. En este estudio se utilizaron trampas cámara en cuatro localidades de la costa central de Oaxaca, México. El trabajo se efectuó de septiembre de 2009 a agosto de 2010, con un esfuerzo total de 1012 días/trampa. Se obtuvieron 160 registros fotográficos independientes de ochos especies de mamíferos carnívoros y respecto a las presas potenciales se registraron cinco especies de mamíferos, dos especies de reptiles y dos grupos (aves y ratones). De acuerdo al Índice de Abundancia Relativa obtenido, los carnívoros más abundantes fueron Spilogale pygmaea, Urocyon cinereoargenteus y Nasua narica, mientras que las presas potenciales más abundantes fueron Didelphis virginiana, Dasypus novemcinctus y el grupo de los ratones. El patrón de actividad de las especies registradas mostró que el 73.8% son de hábitos nocturnos. El ganado vacuno de libre pastoreo mostró una abundancia que podría tener impactos en el ambiente natural y el nivel de recursos disponibles para la fauna silvestre de la región.Palabras clave: Cámaras-trampa, Carnívora, Oaxaca, patrón de actividad, Tututepec.ABSTRACTCarnivorous mammals play an important role on the community structure, however information gaps exist on their current situation debt to their nocturnal habits, evasive behavior and low population densities. In this study, we used camera traps to obtain records of mammal carnivores and their potential prey in four localities in the coastal central of Oaxaca, Mexico. The study was conducted from September 2009 to August 2010, with a total sampling effort of 1,012 trap/days. We obtained 160 independent photographs records of eights carnivorous mammal species and regarding potential prey we obtained five mammals species, two reptile species and two groups (birds and mice). According with the two Relative Abundance Index obtained Spilogale pygmaea, Urocyon cinereoargenteus y Nasua narica were the most abundant carnivorous mammals while that Didelphis virginiana, Dasypus novemcinctus and the mice group were the most abundant potential prey. The activity patterns of the species showed that 73.8% of them are nocturnal. The free range cattle showed an abundance that could have impacts in the natural environment and the level of resources available for the wildlife in the region.Key words: Camera-traps, Carnivora, Oaxaca, activity patterns, Tututepec.

scholarly journals Andean bear (Tremarctos ornatus) population density and relative abundance at the buffer zone of the Chingaza National Natural Park, cordillera oriental of the colombian andes

2020 ◽  
Vol 60 ◽  
pp. e20206030
Author(s):  
Daniel Rodríguez ◽  
Adriana Reyes ◽  
Andres Quiñones-Guerrero ◽  
Fidel Ernesto Poveda-Gómez ◽  
Yeimy Castillo-Navarro ◽  
...  
Keyword(s):  
Population Density ◽  
Habitat Quality ◽  
Relative Abundance ◽  
Individual Recognition ◽  
Buffer Zone ◽  
Camera Traps ◽  
Sampling Effort ◽  
Colombian Andes ◽  
Natural Park ◽  
Conservation Actions

The Andean bear (Tremarctos ornatus) population density and relative abundance within the Chingaza Massif were assessed between September 2015 and May 2016. One hundred seventeen (117) camera traps were installed at 9 grids: 13 cameras per grid, each camera separated 750 m from the other; the sampling effort was 17,057 days-trap. Two thousand seven hundred eighty-four (2,784) native fauna records were obtained, 1,456 corresponding to mammals, 183 records for Andean bear specimens, 158 of them independent bear records (at least one hour between records), and 106 effective-independent bear records (also permitting individual recognition). Fifty-seven (57) Andean bear individuals were identified according to key external morphological features. Sixteen (16) adults were recaptured (12 males and 4 females), with a maximum mean distance of 27.22 km. Bears population density was 2.9 bears per 100 km². Based on this density and the buffer area of the sampling grids, we estimated an overall number of 122 bears in 4,215.15 km². The estimated density is the first for the species in Colombia and the lowest regarding previous reports from other countries. Thus, it is necessary to better understand how integral habitat quality and the anthropic impacts on habitat quality, availability, and connectivity may affect the Andean bear population densities in Colombia, as a useful tool for assessing populations` state and focus future conservation actions.

Impacts of fruit production cycles on Malayan sun bears and bearded pigs in lowland tropical forest of Sabah, Malaysian Borneo

2005 ◽  
Vol 21 (6) ◽  
pp. 627-639 ◽  
Author(s):  
Siew Te Wong ◽  
Christopher Servheen ◽  
Laurentius Ambu ◽  
Ahmad Norhayati
Keyword(s):  
Physical Condition ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Fruit Production ◽  
Selective Logging ◽  
Camera Traps ◽  
Anthropogenic Factors ◽  
Lowland Tropical Forest ◽  
Lowland Tropical Rain Forest ◽  
Fig Trees

We observed a period of famine in the lowland tropical rain forest of Sabah, Malaysia from August 1999 to September 2000. All six Malayan sun bears (Helarctos malayanus) that were captured and radio-collared were in poor physical condition, and two were later found dead. The physical condition of bearded pigs (Sus barbatus) that were captured, observed or photographed by camera traps also revealed that the pigs were in various stages of emaciation and starvation. We surmise that the famine resulted from prolonged scarcity of fruit during an intermast interval in the study area. These phenomena of emaciated animals and fruit scarcity have also been reported from other areas of Borneo. Lowland tropical rain-forest trees of Borneo display supra-annual synchronized general fruiting. We believe that the starvation we observed and the generally low density of large animals in Borneo forests is a consequence of a history of prolonged food scarcity during non-general-fruiting years, but may be accentuated by anthropogenic factors such as forest fragmentation, selective logging, and reduced density of fig trees in logged forests.

scholarly journals Population Structure and Canopy Dominance of Two Emergent Dipterocarp Species in a Tropical Rain Forest of Sarawak, East Malaysia.

Tropics ◽  
1995 ◽  
Vol 4 (2/3) ◽  
pp. 133-141 ◽  
Author(s):  
Akira ITOH ◽  
Takuo YAMAKURA ◽  
Kazuhiko OGINO ◽  
Hua Seng LEE ◽  
Peter S. ASHTON
Keyword(s):  
Population Structure ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
East Malaysia

scholarly journals Diversidad y patrones de actividad de mamíferos medianos y grandes en la Reserva de la Biosfera La Encrucijada, Chiapas, México

2018 ◽  
Vol 66 (2) ◽  
pp. 634
Author(s):  
Julio C. Hernández Hernández ◽  
Cuauhtémoc Chávez ◽  
Rurik List
Keyword(s):  
Activity Patterns ◽  
Biosphere Reserve ◽  
Abundant Species ◽  
Camera Traps ◽  
Sampling Effort ◽  
Large Mammals ◽  
Dasypus Novemcinctus ◽  
Nasua Narica ◽  
The Pacific ◽  
Dry Seasons

Diversity and activity patterns of medium and large mammals in La Encrucijada Biosphere Reserve, Chiapas, Mexico. In Mexico, wetlands occupy an important portion of the country, among them, mangroves are particularly diverse. La Encrucijada Biosphere Reserve (ENBIRE) is a coastal ecosystem of mangrove located along the Pacific Coastal Plain in the Southwestern portion of Chiapas state. The ENBIRE mangroves are among the most important of the American Pacific Coast, highlighting the role they play in the maintenance of the community of mammals on the coast of the state. There are few studies in Mexico related to the mammals associated with these ecosystems, our aim was to estimate the diversity and activity patterns of medium and large mammals in the ENBIRE. Sampling was conducted from August 2015 to August 2016 using camera traps. We obteined 1 851 independent photographs records, with a total sampling effort of 5 400 trap-days. Nineteen species of mammals were registered belonging to 15 families and seven orders, and five species were new records to the area. Six species present are listed, two as endangered and four as threatened. Interpolation and extrapolation analyzes showed an asymptotic trend in the curves for the rainy and dry seasons. The coverage of the sample for both seasons was 99.9 % and 99.8 %, respectively, indicating that both cases were a representative sample. According to the relative abundance index obtained, the most abundant species were Procyon lotor (IAR = 4.35), Nasua narica (IAR = 3.91), Philander opossum (IAR = 2.04), Cuniculus paca (IAR = 1.89), Didelphis marsupialis (IAR = 1.67) and Dasypus novemcinctus (IAR = 1.02). In terms of patterns of activity C. paca, P. opossum, D. marsupialis and D. novemcinctus were primarily nocturnal; P. lotor showed a tendency towards nocturnal habits but was also recorded during the day; N. narica was mainly diurnal. This information can be useful to the creation of management programs and the conservation of medium and large mammals in the ENBIRE, especially for species at risk. Rev. Biol. Trop. 66(2): 634-646. Epub 2018 June 01. 

Sign in / Sign up

Export Citation Format

Share Document