Título:	Evolution of caudal luring in Viperidae OPPEL 1811
Outros títulos:	Evolução do engodo caudal em Viperidae OPPEL 1811
Autor(es):	Giozza, Aída Pereira
Orientador(es):	Brandão, Reuber Albuquerque
Assunto:	Caracteres ancestrais Mudanças ontogenéticas na dieta Cauda conspícua Mimetismo agressivo Serpentes
Data de publicação:	9-Fev-2021
Data de defesa:	24-Set-2020
Referência:	GIOZZA, Aída Pereira. Evolution of caudal luring in Viperidae OPPEL 1811. 2020. 165 f., il. Dissertação (Mestrado em Zoologia)—Universidade de Brasília, Brasília, 2020.
Abstract:	Snakes present numerous feeding strategies. They can be active or sit-and-wait foragers. Aggressive mimicry is an ambush strategy that is present in various animal taxa. There are several examples of aggressive mimicry throughout the animal kingdom, one of which happens when the predator mimics food items of an eventual prey to attract it. Caudal luring is the most common form of aggressive mimicry among snakes, especially in the Viperidae family. Caudal luring is the attraction of prey that feeds on worm-like invertebrates by a cryptically colored snake that waves a conspicuous tail tip. It is often performed by juvenile snakes that also present ontogenetic shifts in diet from ectothermic to endothermic prey. Several authors assumed that the presence of caudal luring (CL) is correlated to conspicuous tail tips (CTT) and ontogenetic shifts in the diet (OSD), but that correlation was never tested. Herein, I investigated the pattern of origin and persistence of CL, CTT, and OSD along Viperidae evolution, measuring their phylogenetic signal as well as testing if there is indeed a correlation between these characters. I searched for information about the presence or absence of CL, CTT, and OSD in the scientific literature for 263 species of viperids found in Alencar et al. (2016) phylogeny, and assembled it in a data matrix. I also used websites of citizen science and scientific popularization that had reliable species identification. I used Phylogenetic comparative methods to measure the phylogenetic signal of the three characters, to test if there is a correlation between each pair of characters, as well as to reconstruct the ancestral character state for the family Viperidae using parsimony and maximum likelihood. I found that all characters have a strong phylogenetic signal, which means that the evolution of the characters is more correlated to the shared evolution inside Viperidae than to ecological constraints. Also, I found there is significant correlation between all the pairs of characters, which corroborates suggestions made previously in the literature. Maximum likelihood reconstruction returned that the ancestor of Viperidae presented all three characters, while the parsimony approach indicated the viperid ancestor having CL and CTT but without OSD. Studies that bring further information on the natural history of viperid snakes should contribute to enrich and complement the knowledge on Viperid evolution.
Unidade Acadêmica:	Instituto de Ciências Biológicas (IB)
Informações adicionais:	Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Zoologia, 2020.
Programa de pós-graduação:	Programa de Pós-Graduação em Zoologia
Licença:	A concessão da licença deste item refere-se ao termo de autorização impresso assinado pelo autor com as seguintes condições: Na qualidade de titular dos direitos de autor da publicação, autorizo a Universidade de Brasília e o IBICT a disponibilizar por meio dos sites www.bce.unb.br, www.ibict.br, http://hercules.vtls.com/cgi-bin/ndltd/chameleon?lng=pt&skin=ndltd sem ressarcimento dos direitos autorais, de acordo com a Lei nº 9610/98, o texto integral da obra disponibilizada, conforme permissões assinaladas, para fins de leitura, impressão e/ou download, a título de divulgação da produção científica brasileira, a partir desta data.
Agência financiadora:	Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).
Aparece nas coleções:	Teses, dissertações e produtos pós-doutorado

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