scholarly journals New altitudinal record for white-lipped peccary Tayassu pecari (Link, 1795) in Ecuador, with notes about activity patterns and herd size

2019 ◽  
Vol 7 ◽  
Author(s):  
Javier Torres ◽  
María Mercedes Gavilánez
Keyword(s):  
Sea Level ◽  
Tropical Rainforest ◽  
Activity Patterns ◽  
Herd Size ◽  
Camera Traps ◽  
Population Status ◽  
Tayassu Pecari ◽  
Trophic Networks ◽  
Conservation Plans

White-lipped peccaries (Tayassupecari) represent a key element of trophic networks in tropical rainforest ecosystems by playing the dual role of consumer and prey. Despite their importance, pressures on their populations have increased during the last few decades due to hunting and deforestation across its distributional range. These pressures may have led the remaining populations to move into new territories and to change their migratory and gregarious behaviour. In this study, we used photographic records from camera traps to collect data on biogeography of white-lipped peccaries in order to answer some questions about the demography, distribution and population size of the species in Ecuador’s western Amazonia. We present new altitudinal records for the species (2,000 metres above sea level), along with some notes on herd size and activity patterns. This information is valuable for obtaining a better understanding of the species distribution and population status in order to achieve better conservation plans.

scholarly journals Are tropical reptiles really declining? A six-year survey of snakes in Drake Bay, Costa Rica, and the role of temperature, rain and light

2019 ◽  
Author(s):  
Jose Pablo Barquero-González ◽  
Tracie L. Stice ◽  
Gianfranco Gómez ◽  
Julián Monge-Nájera
Keyword(s):  
Costa Rica ◽  
Environmental Factors ◽  
Sea Level ◽  
Tropical Rainforest ◽  
Transect Counts ◽  
Diet Type

AbstractIntroductionstudies in the last two decades have found declining snake populations in both temperate and tropical sites, including informal reports from Drake Bay, Costa Rica.Objectiveto investigate if reports of decreasing snake populations in Drake Bay had a real basis, and if environmental factors, particularly temperature, rain and light, have played a role in that decrease.Methodswe worked at Drake Bay from 2012 through 2017 and made over 4000 h of transect counts. Using head flashlights we surveyed a transect covered by lowland tropical rainforest at an altitude of 12–38 m above sea level, near the Agujas River, mostly at 1930–2200 hours. We counted all the snakes that we could see along the transect.Resultssnake counts increase from August to September and then decline rapidly. The May snakes/rainfall peaks coincide, but the second snake peak occurs one month before the rain peak; we counted more snakes in dry nights, with the exception of Imantodes cenchoa which was equally common despite rain conditions. We saw less Leptodeira septentrionalis on bright nights, but all other species were unaffected. Along the six years, the number of species with each diet type remained relatively constant, but the number of individuals declined sharply for those that feed on amphibians and reptiles. We report Rhadinella godmani, a highland species, at 12–38 m of altitude.Conclusionnight field counts of snakes in Drake Bay, Costa Rica, show a strong decline from 2012 through 2017.

scholarly journals Are Tropical Reptiles Really Declining? A Six-year Survey of Snakes in Drake Bay, Costa Rica, and the Role of Temperature, Rain and Light

2019 ◽  
Author(s):  
José Pablo Barquero-González ◽  
Tracie L. Stice ◽  
Gianfranco Gómez ◽  
Julian Monge-Najera
Keyword(s):  
Costa Rica ◽  
Environmental Factors ◽  
Sea Level ◽  
Tropical Rainforest ◽  
Number Of Species ◽  
Transect Counts ◽  
Number Of Individuals ◽  
Diet Type

Introduction: studies in the last two decades have found declining snake populations in both temperate and tropical sites, including informal reports from Drake Bay, Costa Rica. Objective: to investigate if reports of decreasing snake populations in Drake Bay had a real basis, and if environmental factors, particularly temperature, rain and light, have played a role in that decrease. Methods: we worked at Drake Bay from 2012 through 2017 and made over 4000 h of transect counts. Using head flashlights we surveyed a transect covered by lowland tropical rainforest at an altitude of 12–38 m above sea level, near the Agujas River, mostly at 1930–2200 hours. We counted all the snakes that we could see along the transect. Results: snake counts increase from August to September and then decline rapidly. The May snakes/rainfall peaks coincide, but the second snake peak occurs one month before the rain peak; we counted more snakes in dry nights, with the exception of Imantodes cenchoa which was equally common despite rain conditions. We saw less Leptodeira septentrionalis on bright nights, but all other species were unaffected. Along the six years, the number of species with each diet type remained relatively constant, but the number of individuals declined sharply for those that feed on amphibians and reptiles. We report Rhadinella godmani, a highland species, at 12–38 m of altitude. Conclusion: night field counts of snakes in Drake Bay, Costa Rica, show a strong decline from 2012 through 2017.

Abundance, herd size, activity pattern and occupancy of ungulates in Southeastern Mexico

2016 ◽  
Vol 66 (1) ◽  
pp. 97-109 ◽  
Author(s):  
Gabriela Pérez-Irineo ◽  
Antonio Santos-Moreno
Keyword(s):  
Relative Abundance ◽  
Activity Pattern ◽  
Herd Size ◽  
Camera Traps ◽  
Occupancy Models ◽  
Conservation Priority ◽  
Tayassu Pecari ◽  
Occupancy Probability ◽  
Tayassu Tajacu

This study provides information about relative abundance, herd size, activity pattern, and occupancy of ungulates at Los Chimalapas, southeastern Mexico, one of the last refuges inhabited by two conservation priority ungulate species:Tapirus bairdiiandTayassu pecari. For three years, four species of ungulates were recorded using camera traps:T. bairdii,T. pecari,Mazama temama, andTayassu tajacu, involving an effort of 8529 trap-days and 839 records.T. pecariwas found to be highest in relative abundance, whileT. tajacu’s abundance was lowest. Populations were composed principally of adults, but there were records of offspring for all four species. The herd size was smaller compared to other populations ofT. tajacuandT. pecari. Occupancy models were used to analyze the presence of the species in the region and showed thatM. temamaandT. bairdiihad a high occupancy probability. In comparison, the occupancy probability ofT. pecariwas low. This study shows that ungulate populations are still breeding, and have higher possibility of permanence, in Los Chimalapas, Southeastern Mexico. The region is an important area for the conservation ofT. bairdiiandT. pecari, both disappeared from some other areas of the southeast.

THE ROLE OF SEA-LEVEL RISE AND STORMS IN FORMATION AND RESILIENCE OF FLORIDA BAY ISLANDS, EVERGLADES NATIONAL PARK

2019 ◽  
Author(s):  
G. Lynn Wingard ◽  
◽  
Miriam C. Jones ◽  
Sarah E. Bergstresser ◽  
Bethany L. Stackhouse ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
National Park ◽  
Florida Bay ◽  
Everglades National Park ◽  
Bay Islands

scholarly journals Vulnerability to climate change of a microendemic lizard species from the central Andes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
A. Laspiur ◽  
J. C. Santos ◽  
S. M. Medina ◽  
J. E. Pizarro ◽  
E. A. Sanabria ◽  
...  
Keyword(s):  
Climate Change ◽  
Species Distribution Models ◽  
Activity Patterns ◽  
Geographic Range ◽  
Behavioral Thermoregulation ◽  
Rapid Loss ◽  
Distribution Models ◽  
Lizard Species ◽  
Vulnerability To Climate Change

AbstractGiven the rapid loss of biodiversity as consequence of climate change, greater knowledge of ecophysiological and natural history traits are crucial to determine which environmental factors induce stress and drive the decline of threatened species. Liolaemus montanezi (Liolaemidae), a xeric-adapted lizard occurring only in a small geographic range in west-central Argentina, constitutes an excellent model for studies on the threats of climate change on such microendemic species. We describe field data on activity patterns, use of microhabitat, behavioral thermoregulation, and physiology to produce species distribution models (SDMs) based on climate and ecophysiological data. Liolaemus montanezi inhabits a thermally harsh environment which remarkably impacts their activity and thermoregulation. The species shows a daily bimodal pattern of activity and mostly occupies shaded microenvironments. Although the individuals thermoregulate at body temperatures below their thermal preference they avoid high-temperature microenvironments probably to avoid overheating. The population currently persists because of the important role of the habitat physiognomy and not because of niche tracking, seemingly prevented by major rivers that form boundaries of their geographic range. We found evidence of habitat opportunities in the current range and adjacent areas that will likely remain suitable to the year 2070, reinforcing the relevance of the river floodplain for the species’ avoidance of extinction.

scholarly journals Role of Antarctic ice mass balance in present-day sea-level change

Polar Science ◽  
2008 ◽  
Vol 2 (2) ◽  
pp. 149-161 ◽  
Author(s):  
C.K. Shum ◽  
Chung-yen Kuo ◽  
Jun-yi Guo
Keyword(s):  
Mass Balance ◽  
Sea Level ◽  
Sea Level Change ◽  
Level Change ◽  
Ice Mass Balance

Art and the Senses for Ocean Conservation

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Rosabelle Boswell
Keyword(s):  
World Ocean ◽  
Effective Communication ◽  
Sensory Experience ◽  
Ecological Change ◽  
Main Argument ◽  
Human Beings ◽  
The One ◽  
Conservation Plans ◽  
Ocean Conservation

This paper considers the role of art in ocean conservation. Drawing on the presentations and work of two artists featured in the One Ocean Hub Art and Emotions webinar hosted during the UN World Ocean Week, the paper focuses specifically on the sensorial nature of art and of human beings and the role that art can play in advancing ocean conservation. The main argument offered is that ocean conservation plans and policies should consider the importance of humans to ocean conservation, the importance of human artistic endeavour to ocean activism and finally the importance of the sensory to human experience. Acknowledging and recognising the importance of human sensory experience in relation to the sea, can nuance existing discourses of ocean use and benefits, revealing human priorities and potential obstacles to conservation. Third, by leveraging human sensory expression through art, ocean conservation advocates may be able to refine and produce more effective communication for ocean conservation. Finally, recognising the sensory (and the artistic) is key to reorienting humanity as it enters a post-anthropocentric age, marked by dramatic ecological change.

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