Banca de DEFESA: EDILANE MARIA DE LIMA EDUARDO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : EDILANE MARIA DE LIMA EDUARDO
DATE: 25/02/2022
TIME: 09:00
LOCAL: Google Meet
TITLE:

EFFECT OF PRECIPITATION AND PRIMARY PRODUCTIVITY ON PASSERINE BODY MASS IN A RESTINGA AREA IN NORTHEASTERN BRAZIL

KEY WORDS:

Passerines; morphometry; precipitation; primary productivity; diet.

PAGES: 42
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

The way that the body mass of birds varies as a function of climatic and environmental variables has been discussed in several studies in temperate regions, but little is known about how seasonal variations affect the weight of tropical birds. The objective of this work was to describe the weight variations of 29 species of passerines, evaluate whether there is a difference in weight between ages and sexes, and analyze whether precipitation, primary productivity, and diet influence the weight of Passeriformes. Weights were collected between 2010 and 2014 at the Barreira do Inferno Launch Center (CLBI), Parnamirim-RN, northeastern Brazil. The average annual precipitation of the region is 1746 mm, concentrated between March and August, and the vegetation is a mosaic of restinga with herbaceous and shrub formations. The precipitation data are from the CLBI weather station, and the NDVI (Normalized Difference Vegetation Index) was extracted from the SatVeg website and used as a proxy for primary productivity. We adopted the statistical approach of hierarchical model selection based on information theory to test which were the most important predictor variables to explain the variation in weight of the species studied. To do this, we used Generalized Linear Models (GLM), where we considered the random component (response variable weight) being influenced by temporal (precipitation, NDVI, and month) and biological (diet, sex, and age) predictor variables. We used the response variable "weight" standardized by Z-score to be able to compare the various species together We ran t-tests to assess differences in weights between sex and age, and linear regressions to assess whether precipitation and NDVI of the month of capture and months prior to collection influence the weight of individuals. Using standardized weight (Z-score) we saw that juveniles were lighter than adults. We did not detect significant differences in weight between males and females. Rainfall in the month prior to collection and NDVI in the month of collection were the temporal variables that most influenced the weight of adult passerines, the weight of juveniles was not influenced by temporal variables. The guilds were also influenced by the precipitation of the month before and NDVI of the month of collection, being the insectivorous species the only ones in which the weight corresponded to the precipitation of the month of collection.

BANKING MEMBERS:
Externa à Instituição - ANGELICA MARIA KAZUE UEJIMA - UFPE
Interno - 1545394 - FULVIO AURELIO DE MORAIS FREIRE
Externo à Instituição - GUILHERME SANTOS TOLEDO DE LIMA - UFRPE
Presidente - 1439088 - MAURO PICHORIM