ECOLOGIA COMPORTAMENTAL EVOLUTIVA APLICADA A PEIXES DE RIACHO

Autores

  • Tiago H. S. Pires Laboratório de Ecologia Comportamental e Evolução – LECE / Instituto Nacional de Pesquisas da Amazônia – INPA, Cx. Postal 2223, 69080-971, Manaus, AM, Brasil https://orcid.org/0000-0002-4095-7777
  • Jansen Zuanon Laboratório de Ecologia Comportamental e Evolução – LECE / Instituto Nacional de Pesquisas da Amazônia – INPA, Cx. Postal 2223, 69080-971, Manaus, AM, Brasil https://orcid.org/0000-0001-8354-2750

DOI:

https://doi.org/10.4257/oeco.2021.2502.09

Palavras-chave:

adaptation, evolution, life history trade off, natural selection, sexual selection

Resumo

Observações diretas em campo constituem uma importante fonte de informações sobre a história natural e o comportamento de peixes de riacho. Contudo, tais observações diretas podem ser insuficientes para permitir conclusões robustas sobre as causas dos fenômenos biológicos envolvidos, já que dados observacionais frequentemente falham em demonstrar de forma contundente relações de causa e efeito. Neste estudo nós trazemos conceitos necessários para a formulação de hipóteses a partir de uma versão derivada da História Natural e da Etologia, a Ecologia Comportamental Evolutiva. Essa
perspectiva permite análises do contexto evolutivo e do valor adaptativo dos padrões comportamentais observados, e serve de base para novas hipóteses que podem ser aplicadas a muitos grupos de organismos. Observações e experimentos envolvendo peixes de riacho originaram e deram subsídio a muitas teorias sobre a evolução de comportamentos e de características morfológicas peculiares que são amplamente debatidas pela comunidade científica. Após apresentar os conceitos chaves, nós trazemos alguns exemplos de programas de pesquisas com peixes que culminaram na formulação de importantes teorias, onde cientistas aproveitaram as oportunidades que os peixes de riacho oferecem e conduziram
observações, amostragens e experimentos controlados em campo e laboratório. Descrevemos nosso programa de pesquisas, que tem uma espécie amazônica de peixe de riacho (Crenuchus spilurus) como organismo modelo. Ao final, advogamos pela pluralidade de métodos e análises no estudo da Ecologia Comportamental Evolutiva de peixes de riacho.

BEHAVIORAL EVOLUTIONARY ECOLOGY - WITH APPLICATIONS TO FRESHWATER STREAM FISH: Direct field observation constitutes an important source of information on life history and behavior of
stream fish. Unfortunately, information gathered from direct field observations are often limited and thus may fail to provide robust testing for the causation of biological phenomena. Here, we bring concepts that form the theoretical foundation necessary for raising hypotheses in Evolutionary Behavioral Ecology,
a study area directly derived from natural history and ethology that directly incorporates evolutionary processes and the adaptative value of behavioral patterns observed. This perspective allows the analysis
of the evolutionary context and the adaptive value of observed behavioral patterns, and serves as the basis for new hypotheses that can be applied to many groups of organisms. Using this framework, field observations and experiments encompassing freshwater stream fish have subsidized many theories on the evolution of behavioral and morphological traits that are widespread debated by scientific community. After presenting the main key concepts, we bring some examples of research programs with freshwater fish that culminated in the formulation of important theories and where scientists took advantage of the opportunities provided by stream fish to conduct observations, samplings and controlled experiments both in the field and in captivity. We also describe our own research program, which uses an Amazonian freshwater stream fish (Crenuchus spilurus) as a model organism. By doing so, we advocate for the use of several methods and analyses for the study of Evolutionary Behavioral Ecology of freshwater stream fish.

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Publicado

2021-06-16