Banca de QUALIFICAÇÃO: CLAUDIO BELLINI

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : CLAUDIO BELLINI
DATE: 04/01/2024
TIME: 09:30
LOCAL: Google Meet
TITLE:

Green turtles on the Atlantic Island of Fernando de Noronha, Brazil. Thirty-five years of protection (1988-2022): reproductive ecology, population trends, and conservation

KEY WORDS:

Atlantic Ocean; Brazil; Chelonia mydas; Green Turtle; Long-term monitoring; Population trends; Ecological parameters; Conservation; Fernando de Noronha Island

PAGES: 39
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Knowledge of ecological parameters and population trends are key for species of conservation concern. For marine turtles, annual nest counts are commonly used for estimating population size. However, complementary information on reproductive parameters is needed for reliable population estimates. In Brazil, green turtles (Chelonia mydas) nest mainly on oceanic islands. This study uses long-term beach monitoring data (35 years) to describe the reproductive biology and population trends for green turtles at the Fernando de Noronha Archipelago, Brazil. There was an increasing trend in the annual number of nests over the studied period. The average annual number of nests in the first five years of monitoring (1988-1992) was 38.6 nests, while in the last five years (2018-2022) it was 285.6 nests. Internesting intervals ranged from 9 to 17 days (mean +- SD = 11.7 ± 1.3 days; median = 12, n = 1236). Remigration intervals of 3 years were the most frequent (range 2 to 16 years). The longest reproductive life span observed was 25 years. Average hatching success was 75.6% (SD = 24.8, range = 0-100, n = 2612 nests). The growth in the annual number of green turtle nests observed in Fernando de Noronha suggests conservation efforts initiated in the 1980s likely contributed to the recovery of this population. However, the small population size and restricted nesting geographic distribution, coupled with the existence of threats such as fishing and climate change, makes this population still of conservation concern

COMMITTEE MEMBERS:
Presidente - 1718346 - EDUARDO MARTINS VENTICINQUE
Interno - 1439088 - MAURO PICHORIM
Interna - 1863735 - RENATA SANTORO DE SOUSA LIMA