scholarly journals The bobcat (Lynx rufus) in the Nayarit Coastal Plain, México: presence, relative abundance and activity patterns

2021 ◽  
Vol 2 (3) ◽  
pp. 125-131
Author(s):  
Víctor H. Luja ◽  
Ricardo Rodríguez-Estrella ◽  
Diana J. Guzmán-Báez ◽  
Luis Jiménez
Keyword(s):  
Relative Abundance ◽  
Coastal Plain ◽  
Activity Patterns ◽  
Lynx Rufus

El gato montés, Lynx rufus, es una de las seis especies de felinos silvestres que habitan en México. Se distribuye desde el nivel del mar hasta los 3,600 m, ocupando una gran variedad de hábitats entre los que se encuentran los desiertos, ecosistemas de montaña y humedales.  Sin embargo, a la fecha, no existe información ecológica de la especie en humedales costeros.  El objetivo general de este trabajo es proveer la primera información ecológica obtenida de forma sistemática sobre el gato montés en la Planicie Costera de Nayarit (PCN).  Evaluamos su presencia histórica y actual, su abundancia relativa y patrones de actividad.  Determinamos la presencia histórica del gato montés en la PCN mediante una búsqueda en bases de datos electrónicas utilizando las palabras: “Lynx”, “rufus”, “lince”, “bobcat” y “Nayarit”.  Implementamos el protocolo del Censo Nacional del Jaguar usando cámaras trampa en un área de 72 km2 para documentar la presencia, distribución, abundancia relativa y patrones de actividad del gato montés. A través de la búsqueda en bases de datos encontramos 23 registros de gato montés en un área de al menos 3,000 km2 de la PCN. A partir de nuestro trabajo de campo obtuvimos 30 registros independientes con una abundancia relativa de 1.28 fotografías de gato montés / 100 días cámara.  Documentamos la presencia de al menos 10 individuos diferentes, incluyendo adultos de ambos sexos y una hembra presuntamente embarazada. Su actividad es nocturna; 40 % de los registros ocurrieron entre las 00:00-06:00 hr.  El gato montés habita los ecosistemas costeros de Nayarit.  Los valores elevados de abundancia relativa sugieren una población estable en la PCN con respecto a lo que ha sido reportada en hábitat ideales para la especie tales como los matorrales y bosques templados.  Su actividad nocturna coincide con lo que reportan otros trabajos para la especie.  Aunque, en general, el gato montés se adapta bien al disturbio generado por actividades humanas, los impactos que estas tienen sobre sus poblaciones en los humedales costeros aún se desconocen.  Para asegurar la permanencia de sus poblaciones es necesario realizar futuros estudios sobre su dieta, reproducción, ámbito hogareño y conectividad genética de la especie en los ecosistemas costeros del occidente de México.

Serpentes de um fragmento urbano de Mata Atlântica: sobrevivendo ao concreto

2013 ◽  
Vol 13 ◽  
Author(s):  
Breno Hamdan ◽  
Daniela Pinto-Coelho ◽  
Pedro Tourinho Dantas ◽  
Rejâne Maria Lira-da-Silva
Keyword(s):  
Comparative Analysis ◽  
Key Words ◽  
Relative Abundance ◽  
Food Habits ◽  
Activity Patterns ◽  
Boa Constrictor ◽  
Α Diversity ◽  
The Face ◽  
Almost All ◽  
The City

Although researches on richness, composition and conservation of Atlantic rainforest’s herpetofauna have focused on large and protected areas, small fragments subject to human interference are important to maintain α-diversity, as they often constitute the only relictual areas with favorable habitats for those species within the cities. In this paper, we report the richness and composition of snakes from a small urbanized area in the Universidade Federal da Bahia (UFBA), in the city of Salvador, state of Bahia, focusing on its conservation. We also propose hypotheses to explain the mechanisms that would facilitate the coexistence of these species, even in the face of an intense fragmentation process. The list of species here presented was based on the registers from the Museu de Zoologia of UFBA and the register book of the “Núcleo Regional de Ofiologia e Animais Peçonhentos da Bahia” (1987–2012). Based on the literature, each taxon was characterized with respect to habitat use, substrate, activity patterns and food habits. Nine species, belonging to the families Boidae (Boa constrictor) and Colubridae (Helicops leopardinus, Liophis almadensis, L. miliaris, L. taeniogaster, Oxyrhopus trigeminus, Philodryas olfersii, Sibynomorphus neuwiedi and Tantilla melanocephala), were registered. A comparative analysis of data from habitat and activity patterns of the species studied suggests that the coexistence of nine taxa in such fragment may be related to different combinations of substrate use and diet. Liophis almadensis (jararaquinha-false) and B. constrictor (python) showed higher relative abundance and were the only species recorded from 2010–2012, suggesting that part of the herpetofauna reported over the last 14 years may be locally extinct. This observation is even more critical because this period coincides with the suppression of almost all remaining fragments of Atlantic forest in the study area for university modernization and expansion.Additional key words: Bahia, conservation, local extinction, snakes, UFBA.

scholarly journals Space Use and Movement of Urban Bobcats

Animals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 275 ◽  
Author(s):  
Julie Young ◽  
Julie Golla ◽  
John Draper ◽  
Derek Broman ◽  
Terry Blankenship ◽  
...  
Keyword(s):  
Home Range ◽  
Behavioral Plasticity ◽  
Activity Patterns ◽  
Space Use ◽  
Home Range Size ◽  
Range Size ◽  
Lynx Rufus ◽  
Urban Setting ◽  
Home Range Overlap ◽  
Range Overlap

Global urbanization is rapidly changing the landscape for wildlife species that must learn to persist in declining wild spacing, adapt, or risk extinction. Many mesopredators have successfully exploited urban niches, and research on these species in an urban setting offers insights into the traits that facilitate their success. In this study, we examined space use and activity patterns from GPS-collared bobcats (Lynx rufus) in the Dallas–Fort Worth metroplex, Texas, USA. We found that bobcats select for natural/agricultural features, creeks, and water ways and there is greater home-range overlap in these habitats. They avoid roads and are less likely to have home-range overlap in habitats with more roads. Home-range size is relatively small and overlap relatively high, with older animals showing both greater home-range size and overlap. Simultaneous locations suggest bobcats are neither avoiding nor attracted to one another, despite the high overlap across home ranges. Finally, bobcats are active at all times of day and night. These results suggest that access to natural features and behavioral plasticity may enable bobcats to live in highly developed landscapes.

scholarly journals Mesopredators change temporal activity in response to a recolonizing apex predator

2019 ◽  
Vol 30 (5) ◽  
pp. 1324-1335 ◽  
Author(s):  
Carolyn R Shores ◽  
Justin A Dellinger ◽  
Eric S Newkirk ◽  
Shannon M Kachel ◽  
Aaron J Wirsing
Keyword(s):  
Activity Patterns ◽  
Niche Overlap ◽  
Lynx Rufus ◽  
Gray Wolf ◽  
Apex Predator ◽  
Apex Predators ◽  
Anthropogenic Landscapes ◽  
Mediated Effects ◽  
Top Predators ◽  
Temporal Overlap

Abstract Apex predators can influence ecosystems through density and behaviorally mediated effects on herbivores and mesopredators. In many parts of the world, apex predators live in, or are returning to, landscapes that have been modified by people; so, it is important to understand their ecological role in anthropogenic landscapes. We used motion-activated game cameras to compare the activity patterns of humans and 2 mesopredators, coyotes (Canis latrans) and bobcats (Lynx rufus), in areas with and without an apex predator, the gray wolf (Canis lupus), in a multiuse landscape of the northwestern United States. In areas with wolves, there was a significant increase in temporal niche overlap between the mesopredators owing to higher levels of coyote activity at all time periods of the day. Temporal overlap between mesopredators and humans also increased significantly in the presence of wolves. Coyotes exposed to wolves increased their activity during dawn, day, and dusk hours. The increase in coyote activity was greatest during the day, when wolves were least active. The direction of change in bobcat activity in areas with wolves was opposite to coyotes, suggesting a behaviorally mediated cascade between wolves, coyotes, and bobcats, although these findings would need to be confirmed with further research. Our findings suggest that mesopredators in human-dominated systems may perceive humans as less dangerous than apex predators, that humans may be more likely to encounter mesopredators in areas occupied by top predators, and that behaviorally mediated effects of apex predators on mesopredators persist in human-dominated landscapes.

Relative abundance and activity patterns explain method-related differences in mammalian species richness estimates

2019 ◽  
Vol 100 (1) ◽  
pp. 192-201 ◽  
Author(s):  
Cathleen M Steinbeiser ◽  
John Kioko ◽  
Amani Maresi ◽  
Rehema Kaitilia ◽  
Christian Kiffner
Keyword(s):  
Species Richness ◽  
Relative Abundance ◽  
Mammalian Species ◽  
Activity Patterns

Phosphorus status of the Nigerian coastal plain sands

1979 ◽  
Vol 93 (2) ◽  
pp. 281-289 ◽  
Author(s):  
E. J. Udo ◽  
V. I. Dambo
Keyword(s):  
Relative Abundance ◽  
Coastal Plain ◽  
Equilibrium Solution ◽  
Clay Content ◽  
Relative Distribution ◽  
Organic P ◽  
Residual P ◽  
Adsorption Capacities ◽  
Phosphorus Status ◽  
Total P

SUMMARYThe phosphorus status of five Nigerian coastal plain sands was evaluated by determining the relative abundance of the various P forms and the P adsorption capacities of the soils. Total P ranged from 4460 to 1129 mg/kg. Organic P had a range of 23–232 mg/kg and formed below 30% of total P in four of the profiles but above 50% in the hydromorphic Otegbo profile. The relative distribution of the various inorganic forms was in the increasing order of residual P, active P and occluded P, except in the Onne profile in which the residual P was relatively the least abundant. The relative distribution of the active P forms was in the decreasing order of Fe-P, Al-P and Ca-P.The adsorption capacity varied widely among the soils. The amount adsorbed from the addition of 150 mg/100 g of soil ranged from 40–2 to 86–2 mg/100 g and was related to the clay content. The adsorption at 0–3 mg/1 P in equilibrium solution ranged from 19 to 265 mg/kg. The subsoils generally adsorbed more P than the surface soils. The P requirements of the soils estimated from the sorption capacities were in the low and medium ranges.

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.

scholarly journals Relative abundance and activity patterns of wild felids in Chimalapas rainforest, Oaxaca, Mexico

Therya ◽  
2016 ◽  
Vol 7 (1) ◽  
pp. 123-134 ◽  
Author(s):  
Miguel Briones-Salas ◽  
Iván Lira-Torres ◽  
Rogelio Carrera-Treviño ◽  
Gerardo Sánchez-Rojas
Keyword(s):  
Relative Abundance ◽  
Activity Patterns ◽  
Wild Felids

scholarly journals Habitat Use and Activity Patterns of Mammals and Birds in Relation to Temperature and Vegetation Cover in the Alpine Ecosystem of Southwestern China with Camera-Trapping Monitoring

Animals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3377
Author(s):  
Zhouyuan Li ◽  
Zhuo Tang ◽  
Yanjie Xu ◽  
Yingying Wang ◽  
Zhaogang Duan ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Relative Abundance ◽  
Activity Patterns ◽  
Bird Species ◽  
Camera Trapping ◽  
Environmental Drivers ◽  
The Tibetan Plateau ◽  
Mammal Species ◽  
Multivariate Statistical ◽  
Relict Species

The high-altitude ecosystem of the Tibetan Plateau in China is a biodiversity hotspot that provides unique habitats for endemic and relict species along an altitudinal gradient at the eastern edge. Acquiring biodiversity information in this area, where the average altitude is over 4000 m, has been difficult but has been aided by recent developments in non-invasive technology, including infrared-triggered camera trapping. We used camera trapping to acquire a substantial number of photographic wildlife records in Wolong National Nature Reserve, Sichuan, China, from 2013 to 2016. We collected information of the habitat surrounding the observation sites, resulting in a dataset covering 37 species and 12 environmental factors. We performed a multivariate statistical analysis to discern the dominant environmental factors and cluster the mammals and birds of the ecosystem in order to examine environmental factors contributing to the species’ relative abundance. Species were generalized into three main types, i.e., cold-resistant, phyllophilic, and thermophilic, according to the identified key environmental drivers (i.e., temperature and vegetation) for their abundances. The mammal species with the highest relative abundance were bharal (Pseudois nayaur), Moupin pika (Ochotona thibetana), and Himalayan marmot (Marmota himalayana). The bird species with highest relative abundance were snow partridge (Lerwa lerwa), plain mountain finch (Leucosticte nemoricola), Chinese monal (Lophophorus lhuysii), and alpine accentor (Prunella collaris).

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