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Acoustic interference and recognition space within a complex assemblage of dend...
Amézquita, Adolfo; Flechas, Sandra V.; Lima, Albertina Pimental; Gasser, Herbert; Hödl, WalterIn species-rich assemblages of acoustically communicating animals, heterospecific sounds may constrain not only the evolution of signal traits but also the much less-studied signal-processing mechanisms that define the recognition space of a signal. To test the hypothesis that the recognition space is optimally designed, i.e., that it is narrower toward the species that represent the higher potential for acoust...
Decoupled evolution between senders and receivers in the neotropical Allobates ...
Betancourth-Cundar, Mileidy; Lima, Albertina Pimental; Hödl, Walter; Amézquita, AdolfoDuring acoustic communication, an audible message is transmitted from a sender to a receiver, often producing changes in behavior. In a system where evolutionary changes of the sender do not result in a concomitant adjustment in the receiver, communication and species recognition could fail. However, the possibility of an evolutionary decoupling between sender and receiver has rarely been studied. Frog populati...
Calls, colours, shape, and genes: A multi-trait approach to the study of geogra...
Amézquita, Adolfo; Lima, Albertina Pimental; Jehle, Robert; Castellanos, Lina; Ramos, Óscar; Crawford, Andrew J.; Gasser, Herbert; Hödl, WalterEvolutionary divergence in behavioural traits related to mating may represent the initial stage of speciation. Direct selective forces are usually invoked to explain divergence in mate-recognition traits, often neglecting a role for neutral processes or concomitant differentiation in ecological traits. We adopted a multi-trait approach to obtain a deeper understanding of the mechanisms behind allopatric diverge...
The value of including intraspecific measures of biodiversity in environmental ...
Simões, Pedro Ivo; Stow, Adam J.; Hödl, Walter; Amézquita, Adolfo; Farias, Izeni P.; Lima, Albertina PimentalThe distribution of many vertebrate species in the Amazon basin is delimited by large rivers, which are frequently regarded as geographic barriers related with speciation and are therefore of high conservation value. Rapid development in the region includes plans to dam one of its thirteen major rivers, the Xingu. Environmental impact assessment is required for large scale development within the Brazilian porti...