Banca de QUALIFICAÇÃO: JONATHAS GABRIEL SUDARIO BARROS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JONATHAS GABRIEL SUDARIO BARROS
DATE: 31/05/2022
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: 23
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 a wide distribution, little is known about the ecology of this species outside North America. Our objective is 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, we used the State Reserve Ponta do Tubarão/RN for data collection, where three transects were made (MDG, MPA and P) with points spaced every 300 m, totaling 12 points per transect. The data collections occurred in two seasons, rainy and dry, comprising the months of February, March, April and May, and August, September, October and November, respectively. At each sampling point, all individuals of C. wilsonia were counted and the distance from the observer was measured, within a radius of 150 m. Considering presence and absence data, and the probability of detection, we ran static occupancy models (single-season), in the MARK program, to evaluate the species' occupancy and habitat preference. 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 the occupancy models we have that the transects showed relevance, 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 food scarcity. 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 limited data on habitat occupancy and use related to the ecology of the Wilson’s Plover.


BANKING MEMBERS:
Interno - 1718346 - EDUARDO MARTINS VENTICINQUE
Externo à Instituição - JOÃO PAULO TAVARES DAMASCENO
Presidente - 1439088 - MAURO PICHORIM
Notícia cadastrada em: 12/05/2022 08:52
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