Banca de DEFESA: JONATHAS GABRIEL SUDARIO BARROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JONATHAS GABRIEL SUDARIO BARROS
DATE: 02/08/2022
TIME: 09:00
LOCAL: Google Meet
TITLE:

HABITAT USE AND OCCUPANCY OF THE WILSON’S PLOVER (CHARADRIUS WILSONIA): A CONTRIBUTION TO THE NATIONAL ACTION PLAN FOR THE CONSERVATION OF MIGRATORY SHOREBIRDS.

KEY WORDS:

Shorebirds; demography; RDS Ponta do Tubarão; habitat preference; coastal areas.

PAGES: 30
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Coastal areas are important habitats for shorebirds, among them, the Wilson’s Plover (Charadrius wilsonia), a medium-sized bird with a distribution from North America to northeastern Brazil along the Atlantic coast and from Mexico to Peru along the Pacific. Despite its distribution, little is known about the ecology of this species in the southern hemisphere. Our objective was to estimate demographic and occupancy data of C. wilsonia, in order to contribute to the achievement of objective 4.1 of the National Plan for the Conservation of Migratory Shorebirds. For this purpose, we used the State Sustainable Development Reserve Ponta do Tubarão/RN for data collection, where we conducted three transects (named MDG, MPA and P) with 12 observation points spaced every 300 m. The collections occurred in two seasons, rainy and dry, comprising the months of February to May, and August to November, respectively. With this, we assembled presence and absence histories for static occupancy modeling (single-season) in the MARK program. A total of 128 models were generated from the global model. The detection probabilities were set to vary with the tide. As main results of theoccupancy models we have that the transects were relevant, along with the presence of dunes, underbrush and sandy beach. The MDG transect obtained the highest occupancy rate (Ѱ = 0.88), followed by MPA (Ѱ = 0.58) and P (Ѱ = 0.12). The presence of dunes negatively affected the occupancy of C. wilsonia, while underbrush and sandy beach had a positive but still uncertain interaction. The results indicate that the occupation pattern of C. wilsonia seems to be influenced by food availability and protection, where in regions with dunes they are more exposed to predators and with a greater scarcity of food. Our findings will directly contribute to the population and habitat research goals outlined in the National Action Plan for the Conservation of Migratory Shorebirds, and complement the limited data on occupancy and habitat use related to the ecology of the Wilson’s Plover outside of North America.

COMMITTEE MEMBERS:
Externo à Instituição - GUILHERME SANTOS TOLEDO DE LIMA - UFRPE
Externo à Instituição - JOÃO PAULO TAVARES DAMASCENO
Presidente - 1439088 - MAURO PICHORIM