Banca de QUALIFICAÇÃO: BETÂNIA ARCANJO DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : BETÂNIA ARCANJO DE OLIVEIRA
DATA : 30/12/2022
HORA: 14:00
LOCAL: Online transmitido via Google Meet - Nova Xavantina - MT
TÍTULO:

Effects of environmental factors on spawning areas and on the reproductive success of Amazonian Turtles Podocnemis expansa (Schweigger, 1812) and Tracajá Podocnemis unifilis (Troschel, 1848) in areas monitored in eastern Mato Grosso)

PALAVRAS-CHAVES:

Spawning, fires, temperature, live young, reproductive success

PÁGINAS: 27
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
SUBÁREA: Ecologia de Ecossistemas
RESUMO:

During the reproductive period, mother turtles seek out locations that provide physical
factors that allow for safe shelter and the warmth necessary to ensure an adequate
incubation process until their hatchlings hatch. The characteristics of egg deposition sites
can intervene in the maturation of the embryo and in its ontogenetic and behavioral
development. These sites, may be subject to anthropic actions, for example, the risk of
forest fires that can affect the reproduction of turtles. Given this context, this study aims to:
1. To evaluate the impact of fire on turtle nesting. Our hypothesis is that spawning areas
more exposed to fire will tend to have lower reproductive success of P. expansa and P.
unifilis turtles. 2. Evaluate the effect of mean temperature on nest reproductive success
through incubation period and egg emergence, testing the hypothesis that sites where there
is a higher mean temperature over the nest have greater reproductive success. The data
concerning the species were provided by the Rio das Mortes Turtles project, which is a
responsibility of the ONG Aliança da Terra. The information on the fires on the spawning
beaches from 2006 to 2020 was obtained from the INPE database, and the average
incubation temperature was obtained from the meteorological stations through the
Agritempo monitoring system. To evaluate the impact of fire on turtle spawning and the
effect of average environmental temperature on the reproductive success of the species, we
performed a Generalized Mixed Models analysis with Poisson distribution. The variables
number of fire outbreaks, 5km scale, average temperature of the county along with
intercept showed a significant effect on reproductive success. Thus, for P. expansa the
number of fire outbreaks negatively influenced reproductive success, while the average
temperature of the municipality positively influenced reproductive success for the number
of live pups. Our results, for P. unifilis, showed that the number of fire spots on a scale of 1
km negatively influenced the reproductive success of the tracajás, as well as the average
temperature of the municipality, where the higher average temperature had a lower
reproductive success.

MEMBROS DA BANCA:
Presidente - 068.877.126-28 - DILERMANDO PEREIRA LIMA JUNIOR - UEM
Interno - 005.506.021-86 - FABRÍCIUS MAIA CHAVES BICALHO DOMINGOS - NENHUMA
Externo à Instituição - LEANDRO SCHLEMMER BRASIL - UFMT