Panthera onca continent

Estado de conservación del jaguar Panthera onca a escala continental

Las manchas del jaguar son más oscuras de los que parecen: evaluación del estado de conservación global del jaguar Panthera onca

Un reciente análisis realizado por investigadores de la Universidad Nacional Autónoma de México, y la participación de ProCAT Colombia/Internacional, publicado en la revista Oryx de Inglaterra, evaluó el estado de conservación del jaguar Panthera onca a nivel de todas sus poblaciones a nivel continental; las conclusiones no son muy alentadores, donde a pesar de contar con una población considerable en la Amazonía, 33 de las 34 poblaciones se encuentran en un estado serio de amenaza.

El número de jaguares en las 33 poblaciones fuera del Amazonas se acerca al promedio de 209 individuos, ´resaltando la urgencia de enfocar acciones sobre la gran mayoría del rango de distribución de la especie.

Esperamos este nuevo análisis ayude a diseñar y delinear nuevas y mejores acciones de consaervación para asegurar el mantenimiento de las poblaciones de nuestro felino más grande al largo plazo.

The jaguar’s spots are darker than they appear: assessing the global conservation status of the jaguar Panthera onca

Abstract

The IUCN Red List is widely used to guide conservation policy and practice. However, in most cases the evaluation of a species using IUCN Red List criteria takes into account only the global status of the species. Although subpopulations may be assessed using the IUCN categories and criteria, this rarely occurs, either because it is difficult to identify subpopulations or because of the effort involved.

Using the jaguar Panthera onca as a model we illustrate that wide-ranging species that are assigned a particular category of threat based on the IUCN Red List criteria may display considerable heterogeneity within individual taxa in terms of the level of risk they face. Using the information available on the conservation status of the species, we evaluated the jaguar’s current geographical range and its subpopulations. We identified the most threatened subpopulations, using the extent of occurrence, area of occupancy, population size and the level of threat to each subpopulation.

The main outcome of this analysis was that although a large subpopulation persists in Amazonia, virtually all others are threatened because of their small size, isolation, deficient protection and the high human population density. Based on this approach, future conservation efforts can be prioritized for the most threatened subpopulations.

Based on our findings we recommend that for future Red List assessments assessors consider the value of undertaking assessments at the subpopulation level. For the jaguar, subglobal
assessments should be included on the Red List as a matter of urgency.

Full article: https://www.cambridge.org/core/journals/oryx/article/div-classtitlethe-jaguarandaposs-spots-are-darker-than-they-appear-assessing-the-global-conservation-status-of-the-jaguar-span-classitalicpanthera-oncaspandiv/07988F672DDB1CD701370FC3E196199E

Texto completo: https://www.researchgate.net/publication/312599372_The_jaguar%27s_spots_are_darker_than_they_appear_assessing_the_global_conservation_status_of_the_jaguar_Panthera_onca?ev=prf_high