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ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Printable Version

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RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - epaiva - 12-28-2019

Beautiful Pantanal Jaguar
Credit to Steve Winter

*This image is copyright of its original author



RE: Impressive Wild Jaguars - Pictures and Videos - Dark Jaguar - 03-16-2020

Instituto Onça Pintada

Rogério cerrado male and his datas and journey mapped over the wilderness of Cerrado.


Leandro-
''Good Morning! Checking today the data of the male jaguar Rogério, recently captured here in the Região das Nascentes do Rio Araguaia (region of the headwaters of the Araguaia River). Excellent Sunday to all.''


*This image is copyright of its original author





*This image is copyright of its original author



RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Panthera10 - 03-26-2020

Population Genetics of Jaguars (Panthera onca) in the Brazilian Pantanal: Molecular Evidence for Demographic Connectivity on a Regional Scale

Abstract
Habitat loss and fragmentation are important threats to carnivores worldwide, and can be especially intense for large predators. Jaguars have already been extirpated from over half of their original area of distribution, and few regions still maintain large populations. For these, detailed understanding is crucial for setting appropriate recovery targets in impacted areas. The Pantanal is among the best examples of a region with a large jaguar population in a healthy environment. Here, we analyzed 12 microsatellite loci to characterize genetic diversity and population structure of 52 jaguars sampled in 4 localities of the southern Pantanal, and compared them with prior studies of heavily fragmented populations of the Atlantic Forest. Although we observed some internal structure among the Pantanal localities, our results indicated that this area comprises a single population with high genetic variability. Moreover, our comparative analyses supported the hypothesis that the strong population structure observed in the Atlantic Forest derives from recent, anthropogenic fragmentation. We also observed significant but low levels of genetic differentiation between the Pantanal and Atlantic Forest populations, indicating recent connectivity between jaguars occurring in these biomes. Evidence for admixture between the Pantanal and a population on the western boundary of the Atlantic Forest corroborates the transitional nature of the latter area, where the jaguar population has already been extirpated. Our results can be used to understand jaguar population dynamics in a region that is less disturbed than the Atlantic forest, and to support the design of conservation strategies that maintain and restore natural connectivity among currently isolated areas.

https://www.ncbi.nlm.nih.gov/pubmed/26245785


RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Sully - 04-02-2020

A somewhat zen timelapse for #viztober:

Follow the tracks of a single jaguar in Brazil as it seemingly plays The Floor Is Lava with lower elevations. (Made in @Carto)

 pic.twitter.com/x5H69X6oeg

— Dipika Kadaba (@DipikaKadaba) October 7, 2018


RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Sully - 04-02-2020

New Border Wall Segments Would End U.S. Jaguar Recovery

TUCSON, Ariz.— The Trump administration’s latest border-wall plan will wall off all remaining jaguar corridors across the U.S.-Mexico border. The Department of Homeland Security announced Monday that it will waive dozens of environmental and public health laws to fast-track border wall construction in Arizona, California and Texas.
“The new border walls will mean the end of jaguar recovery in the United States,” said Randy Serraglio, a conservation advocate at the Center for Biological Diversity. “This tragedy’s all the more heartbreaking because walling off these beautiful wildlands is completely unnecessary and futile. It has nothing to do with border security and everything to do to with Trump’s racist campaign promise.”
The new wall segments lie in remote, mountainous, extremely rugged terrain that correspond perfectly to the handful of remaining corridors jaguars use to move back and forth between the United States and the core of a small, vulnerable breeding population of northern jaguars in Sonora, Mexico.
During wall construction under the Secure Fence Act in the 2000s, the Border Patrol decided it was unnecessary to build walls in these places, despite migrant traffic being far greater than it is now.
“The Border Patrol decided years ago that border walls weren’t needed in these remote areas,” said Serraglio. “It would be incredibly expensive and an engineering nightmare, and there’s no justification in terms of border security. Sacrificing the wildlife and living landscapes of the borderlands for Trump’s vanity wall is criminal.”
Many other species use these remote areas to migrate across the landscape. A 2017 Center report identified 93 threatened and endangered species along the 2,000-mile border that would be harmed by Trump’s wall.
“Jaguars are a key part of the stunningly diverse web of life in the borderlands that will fall apart if these walls are built,” said Serraglio. “The crisis of runaway extinction is devastating wildlife and wild places all over our planet. Trump’s border wall is pouring gas on that fire, and we’ll continue to fight it every step of the way.”
The Center and allies have sued to challenge Trump’s emergency declaration, which would fund this border-wall construction. These groups have also asked the U.S. Supreme Court to review federal court rulings allowing the Trump administration to waive laws to speed border-wall construction from the Pacific Ocean to the Rio Grande Valley.
Beyond jeopardizing wildlife, endangered species and public lands, the U.S.-Mexico border wall is part of a larger strategy of ongoing border militarization that damages human rights, civil liberties, native lands, local businesses and international relations. The border wall impedes the natural migrations of people and wildlife that are essential to healthy diversity.





*This image is copyright of its original author



RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Pckts - 04-21-2020


*This image is copyright of its original author



*This image is copyright of its original author


*This image is copyright of its original author


*This image is copyright of its original author


*This image is copyright of its original author


*This image is copyright of its original author


*This image is copyright of its original author


*This image is copyright of its original author



RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Pckts - 04-22-2020

Almeida also speaks of a Jagaur who was chased by dogs and did the same, he ran until he found a place he thought suitable then he'd run no more and was ready to take on all comers.
It seems as though these big cats know their terrain and understand how which area offers them the best protection and forces the attackers to take them head on. It also seems to prove that they have supreme confidence in themselves and know the advantage is theirs if something is forced to come at them head on.


RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Sully - 06-13-2020

Spatially explicit capture recapture density estimates: Robustness, accuracy and precision in a long-term study of jaguars ([i]Panthera onca[/i])

Abstract

Camera trapping is the standard field method of monitoring cryptic, low-density mammal populations. Typically, researchers run camera surveys for 60 to 90 days and estimate density using closed population spatially explicit capture-recapture (SCR) models. The SCR models estimate density, capture probability (g0), and a scale parameter (σ) that reflects ranging behaviour. We used a year of camera data from 20 camera stations to estimate the density of male jaguars ([i]Panthera onca[/i]) in the Cockscomb Basin Wildlife Sanctuary in Belize, using closed population SCR models. We subsampled the dataset into 276 90-day sessions and 186 180-day sessions. Estimated density fluctuated from 0.51 to 5.30 male jaguars / 100 km2 between the 90-day sessions, with comparatively robust and precise estimates for the 180-day sessions (0.73 to 3.75 male jaguars / 100 km2). We explain the variation in density estimates from the 90-day sessions in terms of temporal variation in social behaviour, specifically male competition and mating events during the three-month wet season. Density estimates from the 90-day sessions varied with σ, but not with the number of individuals detected, suggesting that variation in density was almost fully attributable to changes in estimated ranging behaviour. We found that the models overestimated σ when compared to the mean ranging distance derived from GPS tracking data from two collared individuals in the camera grid. Overestimation of σ when compared to GPS collar data was more pronounced for the 180-day sessions than the 90-day sessions. We conclude that one-off (‘snap-shot’) short-term, small-scale camera trap surveys do not sufficiently sample wide-ranging large carnivores. When using SCR models to estimate the density from these data, we caution against the use of poor sampling designs and/or misinterpretation of scope of inference. Although the density estimates from one-off, short-term, small-scale camera trap surveys may be statistically accurate within each short-term sampling period, the variation between density estimates from multiple sessions throughout the year illustrate that the estimates obtained should be carefully interpreted and extrapolated, because different factors, such as temporal stochasticity in behaviour of a few individuals, may have strong repercussions on density estimates. Because of temporal variation in behaviour, reliable density estimates will require larger samples of individuals and spatial recaptures than those presented in this study (mean +/- SD = 14.2 +/- 1.2 individuals, 37.7 +/- 4.7 spatial recaptures, N = 276 sessions), which are representative of, or higher than published sample sizes. To satisfy the need for larger samples, camera surveys will need to be more expansive with a higher density of stations. In the absence of this, we advocate longer sampling periods and subsampling through time as a means of understanding and describing stability or variation between density estimate


RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Sully - 06-29-2020

Illegal trade in wild cats and its link to Chinese‐led development in Central and South America

Abstract

Seizures of hundreds of jaguar heads and canines in Central and South America from 2014 to 2018 resulted in worldwide media coverage suggesting that wildlife traffickers are trading jaguar body parts as substitutes for tiger parts to satisfy the demand for traditional Asian medicine. We compiled a data set of >1000 seized wild cats (jaguar [Panthera onca ], puma [Puma concolor ], and ocelot [Leopardus pardalis ]) from 19 Central and South American countries and China. We ran generalized additive mixed models to detect trends in wild‐cat seizures from 2012 to 2018 and assess the effects of socioeconomic factors of source countries and between those countries and China on the number of wild cats seized. Jaguar seizures increased over time, and most of the seized jaguar pieces were canines (1991 of 2117). Around 34% (32 of 93) of the jaguar‐part seizure reports were linked with China, and these seizures contained 14‐fold more individuals than those intended for domestic markets. Source countries with relatively high levels of corruption and Chinese private investment and low income per capita had 10–50 times more jaguar seizures than the remaining sampled countries. The number of Chinese residents in Central and South America was not significantly related to the number of jaguars seized. No socioeconomic factors influenced the seizures of puma and ocelots. Legal market chains may provide structure for the illegal chain; thus, the influx of illegal jaguar products is potentially a side effect of the economic partnership between Central and South American countries and China. Poverty and high levels of corruption in the source countries may motivate local people to engage in illegal activities and contribute to the growth of this trade. Supply‐side interventions to curb this threat to Neotropical wild cats may include improved training for officials and promotion of governance and the value of protecting these animals to local people.


RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Balam - 08-22-2020

High-quality shot of a Llanos young female crossing a river with ease. Despite sharing the waters with huge anacondas and crocodiles, Llanos jaguars retained their aquatic habits as much as neighboring populations:







RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Balam - 09-09-2020

Similarities in size between two large males from the Llanos (Caricare) & Pantanal (Sossego)
120 + Kg estimated Caricare next to Totin female


*This image is copyright of its original author

130 kg Sossego next to Jeffa female


*This image is copyright of its original author

Credits to Aurora Reserve & Claudia Ferreira

Some small differences that I have noticed with both populations is that Llanos jaguars appear to have a longer tail, the yellow coloration is also more prevalent and/or stronger in them as opposed to the more common greyish hue for the Pantanal.


RE: ON THE EDGE OF EXTINCTION - C - THE JAGUAR (Panthera onca) - Balam - 09-11-2020

Today, Panthera Colombia had a live conference with the USAID guided by the US ambassador of Colombia regarding the ecology of jaguars, the development of tourism, and the gains done in the Llanos and Pantanal regarding jaguar protection.

Among the speakers, there's Esteban Payan, the president of Panthera Colombia, and Rafael Hoogesteijn.

Some of the findings shared in the live include the first recorded case of infanticide from a female jaguar into another female's cub in the Pantanal:


*This image is copyright of its original author

They stated how rich the density of jaguars in the protected areas of the Pantanal that sightings such as this one of two females sharing a cattle carcass can be reported:


*This image is copyright of its original author

*This image is copyright of its original author

The speaker when into detail regarding the similarities between the Llanos and the Pantanal and about how certain private ranches turned into reserves such as la Aurora are trying to replicate the Pantanal model as jaguar tourism has proven to be a multi-million dollar industry in the Pantanal alone.

Francisco Santos, the US ambassador, asked Rafael about the differences or similarities between la Aurora (Llanos) and Pantanal jaguars, and he said:

"It's the same jaguar, there is partially no difference, the Pantanal jaguars from the analyses we have done are slightly larger, slightly heavier, but in the Casanare Llanos (Colombia) and the Llanos of Apure (Venezuela) you will also get some very heavy males, as heavy as the ones on Pantanal", for visual comparison among both types of jaguars, see the post above.

The team covered other topics more in-depth regarding the promotion of jaguar tourism in Colombia and Brazil, they also touched upon the current fires situation in the Pantanal. The 1-hour full video can be seen here in English: