Banca de DEFESA: LORRAN SAMARITANO LOPES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LORRAN SAMARITANO LOPES
DATE: 04/04/2025
TIME: 09:00
LOCAL: LicBio e meet.google.com/rzh-uyok-rfh
TITLE:

POPULATION ECOLOGY AND ACTIVITY PATTERN OF THE JAGUAR (Panthera onca) IN RELATION TO HUMAN ACTIVITY IN AN AREA UNDER FOREST MANAGEMENT, RONDONIA

KEY WORDS:

Camera traps, Carnivores, Felids, Amazon, Private areas.

PAGES: 94
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUMMARY:

This study gathers systematized information on estimates of population density and activity patterns of jaguars (Panthera onca), specifically in a private area called Fazenda Manoa, located in the municipality of Cujubim/Rondonia in a region known as the "deforestation arc", and which carries out sustainable forest management as one of its main activities. The objectives of this study include: characterizing the population of jaguars present in the area of Fazenda Manoa, estimating the activity pattern of the species, and verifying possible impacts of human activity imposed by forest management on the population evaluated. For data collection, the camera trapping method was used, with sampling taking place over 60 days, between the months of July and September 2023, on roads in two sampling subareas within the farm: Without Management (roads with little human activity) and With Management (roads with high human activity). Sampling was carried out in a rotation system, with 15 points sampled during 30 days in the sub-area Without Management and another 15 sampling points in the sub-area With Management, which also remained for 30 days. At each point, two opposing camera traps were used, aiming to record both flanks of the jaguars for later identification. Through a total effort of 1,624 af/day, 499 photographs of jaguars were obtained, in which a total of 12 individuals, eight males and four females (sex ratio = 2:1) could be identified, with the population abundance estimated at 24 individuals (SE ± 6.62), which was assessed through the conventional capture-recapture model in the CAPTURE software, with sampling occasions of 6 days each. The effective sampling area was measured by HMMDM (half of the mean maximum distance moved), which is half of the mean maximum distance moved and resulted in a total of 699 km2, thus generating a jaguar population density for Fazenda Manoa of 0.034 individuals/km2 or 3.4 individuals per 100 km2 for the study area. The analyses indicated significant differences in the number of independent records (W = 135; p = 0.008) and in population abundance (W = 131.5; p = 0.012) between the Unmanaged and Managed areas. The comparison of the activity pattern of the target species revealed that it is mostly nocturnal, with jaguars exhibiting high temporal overlap Δ = 0.90 (CI 0.79 - 1.00) between the study subareas. However, the activity pattern between jaguars and humans was significantly different, both in the Unmanaged subarea Δ = 0.37 (p < 0.001) and in the Managed subarea Δ = 0.49 (p > 0.001), with jaguars demonstrating a tendency to temporarily avoid peaks of human activity in the farm area. Given the complex interaction between sustainable forest management and jaguar conservation, it is clear that good practices of certified sustainable forest management are essential for the preservation of the species.

COMMITTEE MEMBERS:
Presidente - 1798567 - PAULO VILELA CRUZ
Interno - ***.701.522-** - MARCELO LUCIAN FERRONATO - UNIR
Interna - 1387002 - OSVANDA SILVA DE MOURA
Externo à Instituição - CARLOS RODRIGO BROCARDO - UTFPR