Population Viability Analysis of a Long-Lived Freshwater Turtle, Hydromedusa maximiliani (Testudines: Chelidae)

作者：Famelli Shirley^*; Piacentini Pinheiro Sarah Cristina; Souza Franco Leandro; Chiaravalloti Rafael Morais; Bertoluci Jaime

来源：Chelonian Conservation and Biology, 2012, 11(2): 162-169.

• Testudines
• Chelidae
• Hydromedusa maximiliani
• Brazilian Atlantic rain forest
• population viability analysis
• VORTEX

Maximilian's snake-necked turtle, Hydromedusa maximiliani, is an endemic and vulnerable long-lived freshwater turtle from eastern Atlantic mountainous rainforest regions of Brazil. Three scenarios (real population, optimistic population, and pessimistic-population) based on the species' life-history data and carrying capacity estimates collected throughout 13 yrs were generated with VORTEX and subjected to sensitivity tests to verify the influence of demographic (mortality rate and inbreeding depression) and environmental (fire and deforestation catastrophes) parameters on population viability. The results showed significant differences among the viability scenarios, with extinction probability ranging from 6% to 99%. These analyses illustrate that environmental and demographic stochasticity can negatively impact populations of H. maximiliani and emphasize the necessity of protecting areas for long-lived organisms inhabiting regions impacted by humans.

• 出版日期2012-12