Påverkan av jakttryck, habitatförlust och populationsstorlek på jaguar (Panthera onca) i Tapajós - Arapiuns Extractive Reservat i centrala Amazonas
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
The jaguar is endangered due to hunting and deforestation of rainforests, which in turn reduces the jaguar’s prey. This report is based on a population in the Tapajós - Arapiuns Extractive Reserve in central Amazonia and how hunting pressure, the distribution of sexes killed by hunting, the loss of habitat and population size affect the population during the next 100 years. With the help of previous studies on the hunting pressure and information about jaguar biology in the Tapajos, different simulation models were conducted to gain an appreciation of how the jaguar was affected. A total of thirteen scenarios was made. In the scenarios without hunting and habitat loss, which is not very likely to occur.
I found that the jaguar has good chances of survival after 100 years. Scenarios with low hunting pressure, with the removal of 3 females and 9 males per year indicated that the population declined but still had a good chance of survival. Survival was less likely when hunting pressure increased to 5 females and 14 males. If habitat loss was added to the high hunting pressure, the jaguars went extinct even faster. Scenarios with a habitat loss of 0.24% or 0.71% represented a low risk of extinction in 100 years, but if hunting was added, the risk of extinction increased dramatically. In scenarios with a smaller population size, with different hunting pressure and habitat loss, the populations were very sensitive to change. In the worst case scenario, with hunting higher on females than males, there were serious negative impacts on the population, which is likely to go extinct very quickly.
Place, publisher, year, edition, pages
2016. , 15 p.
IdentifiersURN: urn:nbn:se:kau:diva-41140OAI: oai:DiVA.org:kau-41140DiVA: diva2:914878
Subject / course
Biology programme, 180 hp
Arvidsson, Björn, universitetslektor, docent
Greenberg, Larry, Professor