5 documents found, page 1 of 1
Consequences of population structure for sex allocation and sexual conflict
Rodrigues, Leonor R; Torralba Sáez, Mario; Alpedrinha, João; Lefèvre, Sophie; Brengues, Muriel; Magalhães, Sara; Duncan, Alison B.Both sex allocation and sexual conflict can be modulated by spatial structure. However, how the interplay between the type of dispersal and the scale of competition simultaneously affects these traits in sub-divided populations is rarely considered. We investigated sex allocation and sexual conflict evolution in meta-populations of the spider mite Tetranychus urticae evolving under budding (pairing females from...
Consequences of population structure for sex allocation and sexual conflict
Rodrigues, Leonor R; Torralba Sáez, Mario; Alpedrinha, João; Lefèvre, Sophie; Brengues, Muriel; Magalhaes, S; Duncan, Alison B.Both sex allocation and sexual conflict can be modulated by spatial structure. However, how the interplay between the type of dispersal and the scale of competition simultaneously affects these traits in sub-divided populations is rarely considered. We investigated sex allocation and sexual conflict evolution in meta-populations of the spider mite Tetranychus urticae evolving under budding (pairing females from...
Competition and fixation of cohorts of adaptive mutations under Fisher geometri...
Moura de Sousa, Jorge A.; Alpedrinha, João; Campos, Paulo R.A.; Gordo, IsabelOne of the simplest models of adaptation to a new environment is Fisher's Geometric Model (FGM), in which populations move on a multidimensional landscape defined by the traits under selection. The predictions of this model have been found to be consistent with current observations of patterns of fitness increase in experimentally evolved populations. Recent studies investigated the dynamics of allele frequency...
Brain and gonadal aromatase activity and steroid hormone levels in female and p...
Gonçalves, David; Teles, Magda; Alpedrinha, João; Oliveira, Rui FilipeIn the peacock blenny Salaria pavo large males with well-developed secondary sexual characters establish nests and attract females while small “sneaker” males mimic female sexual displays in order to approach the nests of larger males and parasitically fertilize eggs. These alternative reproductive tactics are sequential, as sneakers irreversibly switch into nesting males. This transition involves major morphol...
Endocrine control of sexual behavior in sneaker males of the peacock blenny Sal...
Gonçalves, David; Alpedrinha, João; Teles, Magda; Oliveira, Rui FilipeThe effects of castration and sex steroid manipulations on the expression of sexual behavior were investigated in a small fish, the peacock blenny, Salaria pavo. In this species, large males defend nests and attract females while small “sneaker” males reproduce by imitating the female morphology and courtship behavior in order to approach nests during spawning events and parasitically fertilize eggs. Sneakers s...