Banca de DEFESA: SÁVIO ARCANJO SANTOS NASCIMENTO DE MORAES

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : SÁVIO ARCANJO SANTOS NASCIMENTO DE MORAES
DATE: 12/08/2021
TIME: 09:00
LOCAL: vídeoconferência online
TITLE:

THE CARCINIZATION PROCESS AS A MEDIATOR TO SEXUAL DIMORPHISM AND MORPHOMETRIC VARIATIONS CLINES: ECOEOGRAPHY IN DECAPODA

KEY WORDS:

Allometry ; Macroecology  ; Crustacea ;Phenotype ; Procrustes Coordinates ; Sexual fitness  ;  Latitude

PAGES: 58
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

  Decapoda can have a variety of body shapes, elongated for superb swimming, asymmetrical, or symmetrically compressed with a hard shell. These are named as: ‘Shrimp-like’, ‘Lobster-like’, ‘Squat-lobster-like’, ‘Pagurus-like’ and ‘Crab-like’, which represent convergent morphotypes in different phylogenetic lineages. This process is known as Carcinization, a series of modifications associated with the occupation of vacant benthic niches in a past scenario. Adaptive convergence processes within the taxa are poorly investigated, and their macroscale mechanisms, such as the Rensch (the correlation of sexual size dimorphism) and Bergmann (positive relationship between mean body size and latitude). Thus, through regressive models with data obtained from a systematic review and collected data (evaluated by the geometric morphometry tool – the information: Centroid Size, Form and Shape) describe/understand the ecomorphological rules. In addition, the variation in body shape was evaluated for interpopulation comparison between species of the same morphotypes. The revised Crab-like families showed a male-female size ratio following the neutrality of Rensch's Rule. The magnitude of sexual dimorphism (DS) of size and size of females showed neutrality of the Rensch Rule. Between Average population size and latitude, there was a tendency to corroborate the Bergmann Rule. And in the DS relation of size and latitude, neutrality was visualized. Information involving magnitude as a response variable (Centroid SD, Shape SD and Form SD) showed similar results both in general models and in trends for each morphotype, the proposed inverse of the Bergmann Rule. Ectotherms have a metabolic limitation based on balance body size, metabolic rate amplitude and optimal thermal rate. The Rensch-Bergmann interaction is a clinal approach to the Rensch’s rule. This suggests that some traits vary systematically with latitude, with Rensch's Rule being visualized in its degree of magnitude among populations and its general trend in the species or lineages in question. Overall, trends in different directions were evidenced, but the sign between morphotypes was not always conclusive. The morpho-space variations showed that morphotypes tend to unify morphometric variations. The vector displacement energies of the 'evolutionary homologies' show an action not always in the same direction, but its variation was noticeable between the axes and in the same structures for each group.   

BANKING MEMBERS:
Externo à Instituição - ALLYSSON PONTES PINHEIRO - URCA
Externo à Instituição - ARIÁDINE CRISTINE DE ALMEIDA - UFU
Presidente - 1545394 - FULVIO AURELIO DE MORAIS FREIRE
Externo à Instituição - LUCIANO DE FREITAS BARROS NETO
Externo à Instituição - PAULO AUGUSTO DE LIMA FILHO - IFRN