scholarly journals Large- and medium-bodied terrestrial mammals of the Upper Berbice region of Guyana

Check List ◽  
2020 ◽  
Vol 16 (5) ◽  
pp. 1229-1237
Author(s):  
Meshach A. Pierre ◽  
Leroy Ignacio ◽  
Evi A. D. Paemelaere
Keyword(s):  
Relative Abundance ◽  
Forest Ecosystems ◽  
Camera Trap ◽  
Camera Traps ◽  
Large Mammals ◽  
Sensitive Species ◽  
Terrestrial Mammals ◽  
Mammal Community ◽  
Eira Barbara ◽  
Brocket Deer

Large mammals are key contributors to forest ecosystems globally, but Neotropical mammal populations are understudied. We employed remotely triggered camera traps and track surveys to assess the mammal community in the newly accessible upper Berbice region of Guyana. In a cumulative 2,821 trap nights between two camps and 14 km of track surveys we recorded 18 species of mammals. Camera trap records showed that Red-Rumped Agouti (Dasyprocta leporina (Linnaeus, 1758)) featured the highest relative abundance at both camps, while Tayra (Eira barbara (Linnaeus, 1758)), Amazonian Brown Brocket Deer (Mazama nemorivaga (F. Cuvier, 1817)), Giant Anteater (Myrmecophaga tridactyla (Linnaeus, 1758)) and Giant Armadillo (Priodontes maximus (Kerr, 1792)) the lowest. We also report naïve occupancy estimates. Detections of threatened and disturbance sensitive species indicate that the study site has a high biodiversity value. We provide recommendations for further study in this recently disturbed ecosystem and other understudied regions of Guyana.

scholarly journals Medium and large-sized mammals of the Reserva Ecológica de Guapiaçú, Cachoeiras de Macacu, RJ

2014 ◽  
Vol 14 (3) ◽  
Author(s):  
Israel Dias de Carvalho ◽  
Rildo de Oliveira ◽  
Alexandra dos Santos Pires
Keyword(s):  
Atlantic Forest ◽  
Rio De Janeiro ◽  
Camera Traps ◽  
Large Mammals ◽  
Terrestrial Mammals ◽  
Mammal Conservation ◽  
Pecari Tajacu ◽  
Local Extinctions ◽  
Global Threat ◽  
Janeiro State

Medium and large-sized terrestrial mammals develop important functions in ecosystems maintenance. However, this group is the most vulnerable to local extinctions, through habitat loss or hunting. This study inventoried the community of medium and large mammals in the Reserva Ecológica de Guapiaçú (REGUA), Cachoeiras de Macacu, RJ, providing data on species composition, richness and abundance. Species were registered through the use of camera traps, sign survey and visual encounters on pre-existing trails and roads. The study was conducted from January to October 2012, with each month considered as a sample unit. An effort of 1568 cameras-day and 120 km traveled, resulted on 302 records of 22 species of medium and large-sized mammals, belonging to eight orders. This value corresponds to more than three-quarters of the richness described from this group in the Atlantic Forest of Rio de Janeiro state. Five species are under some level of regional, national or global threat. Three game species, Pecari tajacu, Cuniculus paca and Dasyprocta leporina were abundant in the area. The observed richness was comparable to that found in other studies conducted in rain forests. Thus, for its high number of species, including those under some degree of threat, we conclude that REGUA is an important area to mammal conservation, especially in the Atlantic Forest of Rio de Janeiro state.

scholarly journals Abundance and composition of the medium to large-sized mammals in a private area of a REDD+ project in Acre, Brazil

2018 ◽  
Vol 18 (3) ◽  
Author(s):  
André Luis Moura Botelho ◽  
Luiz Henrique Medeiros Borges ◽  
Brian McFarland
Keyword(s):  
Gene Flow ◽  
Ecosystem Services ◽  
Relative Abundance ◽  
Rare Species ◽  
Camera Traps ◽  
Large Mammals ◽  
Conservation Areas ◽  
Conservation Units ◽  
Key Species ◽  
Tapirus Terrestris

Abstract: The implementation of private areas focused on conservation of species and habitats, combined with REDD+ policies, has become an important ally for biodiversity conservation, expanding the conservation areas of the most varied habitats, covering key groups such as large mammals, which are extremely important for the maintenance of ecosystem services. In the upper region of the Purus River in Acre, Brazil, an inventory was carried out using camera-traps, of medium and large mammals community in a private REDD+ area, known as the Purus Project. A total of 19 species of mammals were recorded with an effort of 1859 trap-nigths, including rare, endangered and key species. It is estimated that the richness for the area is of 22 species. Endangered and rare species such as the tapir (Tapirus terrestris) and the short-eared dog (Atelocynus microtis) presented high rates of relative abundance compared to other Conservation Units (UCs). The richness of medium to large-sized mammals recorded in the Purus Project underscores the importance of REDD+ in private areas for the conservation of this group, given the challenges for inclusion and creation of new protected areas. REDD+ projects in privates' areas become an important component for conservation of species and the connection between public conservation units favoring the spread of species and populations between areas, and consequently the gene flow.

scholarly journals Long-term monitoring of margays (Leopardus wiedii): Implications for understanding low detection rates

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0247536
Author(s):  
Bart J. Harmsen ◽  
Nicola Saville ◽  
Rebecca J. Foster
Keyword(s):  
Detection Rate ◽  
Camera Trap ◽  
Wide Distribution ◽  
Camera Traps ◽  
Detection Rates ◽  
Terrestrial Mammals ◽  
Exclusive Territories ◽  
Carnivore Species ◽  
Density Population

Population assessments of wide-ranging, cryptic, terrestrial mammals rely on camera trap surveys. While camera trapping is a powerful method of detecting presence, it is difficult distinguishing rarity from low detection rate. The margay (Leopardus wiedii) is an example of a species considered rare based on its low detection rates across its range. Although margays have a wide distribution, detection rates with camera traps are universally low; consequently, the species is listed as Near Threatened. Our 12-year camera trap study of margays in protected broadleaf forest in Belize suggests that while margays have low detection rate, they do not seem to be rare, rather that they are difficult to detect with camera traps. We detected a maximum of 187 individuals, all with few or no recaptures over the years (mean = 2.0 captures/individual ± SD 2.1), with two-thirds of individuals detected only once. The few individuals that were recaptured across years exhibited long tenures up to 9 years and were at least 10 years old at their final detection. We detected multiple individuals of both sexes at the same locations during the same survey, suggesting overlapping ranges with non-exclusive territories, providing further evidence of a high-density population. By studying the sparse annual datasets across multiple years, we found evidence of an abundant margay population in the forest of the Cockscomb Basin, which might have been deemed low density and rare, if studied in the short term. We encourage more long-term camera trap studies to assess population status of semi-arboreal carnivore species that have hitherto been considered rare based on low detection rates.

scholarly journals An assessment of carnivore relative abundance and density in the eastern rainforests of Madagascar using remotely-triggered camera traps

Oryx ◽  
2010 ◽  
Vol 44 (2) ◽  
pp. 219-222 ◽  
Author(s):  
Brian Gerber ◽  
Sarah M. Karpanty ◽  
Charles Crawford ◽  
Mary Kotschwar ◽  
Johnny Randrianantenaina
Keyword(s):  
Relative Abundance ◽  
National Park ◽  
Camera Trap ◽  
Camera Traps ◽  
Domestic Dog ◽  
Likelihood Method ◽  
Ranomafana National Park ◽  
Carnivore Species ◽  
Cryptoprocta Ferox ◽  
Capture Recapture

AbstractDespite major efforts to understand and conserve Madagascar’s unique biodiversity, relatively little is known about the island’s carnivore populations. We therefore deployed 43 camera-trap stations in Ranomafana National Park, Madagascar during June–August 2007 to evaluate the efficacy of this method for studying Malagasy carnivores and to estimate the relative abundance and density of carnivores in the eastern rainforest. A total of 755 camera-trap nights provided 1,605 photographs of four endemic carnivore species (fossa Cryptoprocta ferox, Malagasy civet Fossa fossana, ring-tailed mongoose Galidia elegans and broad-striped mongoose Galidictus fasciata), the exotic Indian civet Viverricula indica and the domestic dog Canis familiaris. We identified 38 individual F. fossana and 10 individual C. ferox. We estimated density using both capture-recapture analyses, with a buffer of full mean-maximum-distance-moved, and a spatially-explicit maximum-likelihood method (F. fossana: 3.03 and 2.23 km-2, respectively; C. ferox: 0.15 and 0.17 km-2, respectively). Our estimated densities of C. ferox in rainforest are lower than published estimates for conspecifics in the western dry forests. Within Ranomafana National Park species richness of native carnivores did not vary among trail systems located in secondary, selectively-logged and undisturbed forest. These results provide the first assessment of carnivore population parameters using camera-traps in the eastern rainforests of Madagascar.

scholarly journals A camera trap assessment of terrestrial mammals in Machalilla National Park, western Ecuador

Check List ◽  
2016 ◽  
Vol 12 (2) ◽  
pp. 1868 ◽  
Author(s):  
Laura Cervera ◽  
Diego J. Lizcano ◽  
Violeta Parés-Jiménez ◽  
Sueanny Espinoza ◽  
Diana Poaquiza ◽  
...  
Keyword(s):  
Wildlife Management ◽  
National Park ◽  
Conservation Status ◽  
Keystone Species ◽  
Camera Trap ◽  
Dry Forest ◽  
Large Mammals ◽  
Panthera Onca ◽  
Terrestrial Mammals ◽  
The Past

Understanding the abundance, geographicdistribution, and conservation status of terrestrial mam­mals is vital to promote effective wildlife management in protected areas. Located in the Tumbes-Chocó-Magdalena hotspot of western Ecuador, Machalilla National Park contains high levels of biodiversity and endemism but suffers from habitat loss and degradation. This study provides an updated inventory of medium-sized to large mammals in the park and assesses changes in species richness over the past 20 years. Surveying 70% of Machalilla’s 562-km2 terrestrial area with 60 camera trap points, we detected 18 species of mammals belonging to 13 families. Richness of terrestrial species has declined in recent decades, due to the disappearance of keystone species like Jaguar (Panthera onca), White-lipped Peccary (Tayassu pecari), and possibly the Sechuran Fox (Lycalopex sechurae). We recommend specific man­agement improvements to ensure conservation of the unique ecosystems and biodiversity of Machalilla, the only national park in Ecuador containing dry forest.

scholarly journals Differences of terrestrial mammal species diversity between natural forest and edge forest areas in Batutegi Protected Forest, Lampung, Indonesia

2020 ◽  
Vol 1 (1) ◽  
pp. 33-39
Author(s):  
Robithotul Huda ◽  
Yossa Istiadi ◽  
Dolly Priatna
Keyword(s):  
Species Diversity ◽  
Sus Scrofa ◽  
Grid Cell ◽  
Camera Trap ◽  
Camera Traps ◽  
Core Area ◽  
Terrestrial Mammals ◽  
The Core ◽  
Research Areas ◽  
Muntiacus Muntjak

This research is an explorative quantitative survey by testing differences in species of terrestrial mammals found in natural forest (core) and edge forest (ecoton) areas. The data collection was obtained by using camera traps installed for 3 months based on a grid cell 2 x 2 km, with a total of 16 camera traps placed in core area and another 17 were in ecotone. The object of this research was medium (0.3 kg) to large terrestrial mammals. The t test was used to determine the differences the species diversity of mammals between two research areas. The study shows that there are 22 species of terrestrial mammals with a total of 552 individuals, which is distributed in both research areas. In the core area there are 18 species with 237 individuals, while in the ecotone there are 18 species with 315 individuals. Analyses the species richness index was 17.8171 for the core area while 17.8262 for the ecotone area. Similarity index in both study areas ranged from 0.7106 to 1. While the value of diversity index (Shannon-Wiener) in the core area H '= 2.2038 and in the ecotone area H' = 2.0541. Three species with the greatest relative abundance values are Porcupine (Hystrix brachyura), Barking Deer (Muntiacus muntjak), and Wild Boar (Sus scrofa). Based on the t tests of the two research areas, which are core area and ecotone, obtained tcount 0.41365 (p 0.05), it can be interpreted that the diversity of terrestrial mammals species in the core and ecotone areas is not the same.Penelitian ini merupakan penelitian kuantitatif survei eksploratif dengan melakukan pengujian perbedaan terhadap jenis mamalia teresterial yang ditemukan di wilayah hutan alam (inti) dan wilayah hutan tepi (ekoton). Pendataan mamalia teresterial menggunakan camera trap yang dipasang selama 3 bulan berdasarkan grid cell 2 x 2 km, dengan 16 camera trap dipasang di areal inti dan 17 lainnya di ekoton. Objek penelitian adalah mamalia teresterial berukuran sedang (0,3 kg) hingga mamalia besar. Uji t digunakan untuk menentukan perbadaan keragaman jenis mamalia teresterial pada dua areal penelitian. Hasil penelitian menunjukkan terdapat 22 jenis mamalia teresterial dengan total 552 individu, yang tersebar di kedua areal penelitian. Pada areal inti terdapat 18 jenis dengan 237 individu, sedangkan pada areal ekoton ditemukan 18 jenis dengan 315 individu. Analisis indeks kekayaaan jenis menunjukkan nilai 17,8171 untuk areal inti dan 17,8262 untuk areal ekoton. Indeks kemerataan pada kedua areal penelitian berkisar antara 0,7106 hingga 1.  Sedangkan nilai indeks keragaman (Shannon-Wiener) pada areal inti H’ = 2,2038 dan pada areal ekoton H’= 2,0541. Tiga jenis mamalia teresterial dengan kelimpahan relatif terbesar yaitu Landak (Hystrix brachyura), Kijang (Muntiacus muntjak), dan Babi hutan (Sus scrofa). Berdasarkan uji beda terhadap dua areal penelitian yaitu areal hutan alam (areal inti) dan areal tepi hutan (ekoton) didapatkan thitung 0,41365 (p 0,05), maka dapat diartikan bahwa keragaman jenis mamalia teresterial di areal inti dan ekoton tidak sama.

scholarly journals Applying camera traps to detect and monitor introduced mammals on oceanic islands

Oryx ◽  
2020 ◽  
pp. 1-8
Author(s):  
Lucas Lamelas-López ◽  
Iván Salgado
Keyword(s):  
Introduced Species ◽  
Large Scale ◽  
Camera Trap ◽  
Oceanic Islands ◽  
Camera Traps ◽  
Camera Trapping ◽  
Sampling Effort ◽  
Terrestrial Mammals ◽  
Management Actions ◽  
Survey Technique

Abstract The introduction of mammal predators has been a major cause of species extinctions on oceanic islands. Eradication is only possible or cost-effective at early stages of invasion, before introduced species become abundant and widespread. Although prevention, early detection and rapid response are the best management strategies, most oceanic islands lack systems for detecting, responding to and monitoring introduced species. Wildlife managers require reliable information on introduced species to guide, assess and adjust management actions. Thus, a large-scale and long-term monitoring programme is needed to evaluate the management of introduced species and the protection of native wildlife. Here, we evaluate camera trapping as a survey technique for detecting and monitoring introduced small and medium-sized terrestrial mammals on an oceanic island, Terceira (Azores). Producing an inventory of introduced mammals on this island required a sampling effort of 465 camera-trap days and cost EUR 2,133. We estimated abundance and population trends by using photographic capture rates as a population index. We also used presence/absence data from camera-trap surveys to calculate detection probability, estimated occupancy rate and the sampling effort needed to determine species absence. Although camera trapping requires large initial funding, this is offset by the relatively low effort for fieldwork. Our findings demonstrate that camera trapping is an efficient survey technique for detecting and monitoring introduced species on oceanic islands. We conclude by proposing guidelines for designing monitoring programmes for introduced species.

scholarly journals Détermination par caméra piège des périodes d’activité de quelques mammifères terrestres au Parc National de Taï

2020 ◽  
Vol 14 (5) ◽  
pp. 1673-1688
Author(s):  
N’guessan Serge Pacôme N’goran ◽  
Noémie Cappelle ◽  
Eloi Anderson Bitty ◽  
Emmanuelle Normand ◽  
Yves Aka Kablan
Keyword(s):  
Body Mass ◽  
National Park ◽  
Camera Trap ◽  
Research Area ◽  
Camera Traps ◽  
Terrestrial Mammals ◽  
Factors Influencing ◽  
The Mean ◽  
Mean Vector ◽  
Primary Forests

Les périodes d’activité des animaux difficilement observables des forêts primaires sont peu connues. Des caméras pièges ont été utilisées pour établir les périodes d’activité de quelques mammifères au Parc national de Taï. Ces caméras non appâtées ont été installées d’octobre 2016 à août 2017. L’enregistrement de l’heure et la date de chaque observation a permis de déterminer des activités nocturnes, diurnes et cathémérales (actif le jour et la nuit) des espèces à travers le pourcentage des vidéos obtenues. Les heures d’activité pour chaque espèce étaient concentrées autour du vecteur moyen (heure moyenne autour de laquelle sont concentrées les heures d’activité de l’espèce) et réparties de manière non-uniforme pendant la période de 24h. Les mammifères de petite masse corporelle (< 10 kg) avaient des tendances nocturnes alors que ceux de grande masse corporelle (> 10 kg) avaient des tendances nocturnes, diurnes ou cathémérales. Certaines espèces cathémérales ont montré des périodes d’activité à prédominance diurne ou nocturne et doivent faire l’objet d’études supplémentaires enfin de connaître les facteurs influençant leur régime d’activité.Mots clés : caméra piège, taux de capture, mammifères, vecteur moyen.   English Title: Activity periods of some terrestrial mammals by using camera traps in Taï National ParkDetermination of cryptic animal’s activity periods is problematic in primary forests and reminds poorly known. Hence, in the Tai National Park, camera traps were used to establish the periods of activity of some mammals. These non-baited cameras were installed in the research area of the park from October 2016 to August 2017. Recording the time and date of each observation enabled to determine nocturnal, diurnal and cathemeral activities of each species through the percentage of videos obtained. Hours of activity for each species were concentrated around the mean vector and were not uniformly distributed over the 24-hour period. Furthermore, mammals with smaller body mass (<10 kg) had nocturnal tendencies whereas those with larger body mass (> 10 kg) had nocturnal, diurnal or cathemeral tendencies. Certain cathemeral species have predominantly shown day or night periods of activity and must be subject to further studies to find out more about the factors influencing their regimes of activity.Keywords: camera trap, detection rate, mammals, mean vector.  

scholarly journals Activity patterns of medium and large mammals in two savanna ecosystems in the Colombian Llanos

2021 ◽  
Author(s):  
Dennis Castillo-Figueroa ◽  
Daniela Martínez-Medina ◽  
Miguel E. Rodríguez-Posada
Keyword(s):  
Mammalian Species ◽  
Activity Patterns ◽  
Camera Traps ◽  
Large Mammals ◽  
Continuous Processes ◽  
Similar Activity ◽  
Terrestrial Mammals ◽  
Neotropical Savannas ◽  
History Of ◽  
Oil Gas

Neotropical savannas have undergone continuous processes of landscape transformation (e.g., agriculture, oil, gas, and hydrocarbon industry) and very little is known about the ecology and natural history of key biological groups such as terrestrial mammals while the information on behavioral aspects of mammalian species in these ecosystems is very scarce. Here, we aimed to describe the activity patterns of medium and large mammals in two savanna ecosystems in the Colombian Llanos. A set of 60 camera traps was installed in the two ecosystems for 35 days (2100 camera days). We described the activity patterns of nine predominantly nocturnal species. We found no difference in circadian distributions of mammals between ecosystems. Cuniculus paca Linnaeus 1758 and Dasyprocta fuliginosa Wagler 1832 showed patterns of exclusion probably due to competition whereas other species like Tamandua tetradactyla Linnaeus1758 and Myrmecophaga tridactyla Linnaeus 1758 displayed similar activity patterns. We highlight the importance of savannas for the conservation of these species and discuss the relevance of studies on activity patterns for mammal ecology and conservation in Neotropical savannas. 

scholarly journals Camera trap placement for evaluating species richness, abundance, and activity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Kamakshi S. Tanwar ◽  
Ayan Sadhu ◽  
Yadvendradev V. Jhala
Keyword(s):  
Species Richness ◽  
Group Size ◽  
Relative Abundance ◽  
Accumulation Rate ◽  
Camera Trap ◽  
Camera Traps ◽  
Parameter Estimates ◽  
Wild Ungulates ◽  
Trail Cameras ◽  
Trap Placement

AbstractInformation from camera traps is used for inferences on species presence, richness, abundance, demography, and activity. Camera trap placement design is likely to influence these parameter estimates. Herein we simultaneously generate and compare estimates obtained from camera traps (a) placed to optimize large carnivore captures and (b) random placement, to infer accuracy and biases for parameter estimates. Both setups recorded 25 species when same number of trail and random cameras (n = 31) were compared. However, species accumulation rate was faster with trail cameras. Relative abundance indices (RAI) from random cameras surrogated abundance estimated from capture-mark-recapture and distance sampling, while RAI were biased higher for carnivores from trail cameras. Group size of wild-ungulates obtained from both camera setups were comparable. Random cameras detected nocturnal activities of wild ungulates in contrast to mostly diurnal activities observed from trail cameras. Our results show that trail and random camera setup give similar estimates of species richness and group size, but differ for estimates of relative abundance and activity patterns. Therefore, inferences made from each of these camera trap designs on the above parameters need to be viewed within this context.

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