Banca de DEFESA: VALÉRIA FONSECA VALE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : VALÉRIA FONSECA VALE
DATE: 28/02/2020
TIME: 14:00
LOCAL: Sala de Reuniões do Centro de Biociências
TITLE:

Macroecological rules in hermit crabs of Western Atlantic

KEY WORDS:

Bergmann's rule, Rensch's rule, Diogenidae, sexual dimorphism, allometry, geometric morphometry

PAGES: 69
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUBÁREA: Ecologia Teórica
SUMMARY:

Body size is one of the fundamental eco-evolutionary variables of species and populations, reflecting the life history of taxa, i.e. physiological variations and fitness traits. Two macroecological rules are strongly related to the body size of organisms: Bergmann and Rensch. Bergmann’s rule states that organisms are larger in colder regions (high latitudes). The Rensch’s rule states that sexual size dimorphism increases when males are larger. In addition to body size, body shape is a covariate in taxa. Desiccation, temperature, distinct energy expenditures during growth, reproduction and life history can all influence the bias of these rules. Some organisms that have their growth mediated by shelter, hermit crabs, for example, have a mandatory metabiosis relationship with gastropod shells, making them excellent models for assessing macroecological and evolutionary patterns in the face of these constraints. Using body size data (literature and in situ), regression models were designed to evaluate the rules separately and their interaction and types of used shelters. In addition to size, shape abstraction was used in investigations in situ data (sexual dimorphism). The three species of Clibanarius showed interpopulation clines consistent with Bergmann’s rule. There was no sexual size dimorphism for Clibanarius between or within species and for evaluation of Rensch’s rule, C. antillensis revealed an inverse pattern to the rule. In the assessment of sex-specific divergence in response to latitudinal gradients, latitude magnified the interpopulation body effect in females. This reveals that body size variation is modulated by fecundity selection.

BANKING MEMBERS:
Presidente - 1545394 - FULVIO AURELIO DE MORAIS FREIRE
Externo à Instituição - PABLO ARIEL MARTINEZ - UFS
Externo à Instituição - PAULO AUGUSTO DE LIMA FILHO - IFRN