Female reproductive tactics in a sex-role reversed pipefish: scanning for male quality and number
نویسنده
چکیده
K. Silva, V.C. Almada, M.N. Vieira, and N.M. Monteiro Departamento de Zoologia e Antropologia, Faculdade de Ciências da Universidade do Porto, Prac xa Gomes Teixeira 4099-002, Portugal, Laboratório de Ecologia, Centro Interdisciplinar de Investigac xão Marinha e Ambiental, Rua dos Bragas 177, 4050-123 Porto, Portugal, Instituto Superior de Psicologia Aplicada, Rua Jardim do Tabaco 34, 1149-041 Lisboa, Portugal, and Centro de Estudos Biomédicos, Faculdade de Ciências da Saúde da Universidade Fernando Pessoa, Rua Carlos da Maia 296, 4200-150 Porto, Portugal
منابع مشابه
Sex-role reversal of a monogamous pipefish without higher potential reproductive rate in females.
In monogamous animals, males are usually the predominant competitors for mates. However, a strictly monogamous pipefish Corythoichthys haematopterus exceptionally exhibits a reversed sex role. To understand why its sex role is reversed, we measured the adult sex ratio and the potential reproductive rate (PRR), two principal factors influencing the operational sex ratio (OSR), in a natural popul...
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Environmental estrogens have been shown to affect populations of aquatic organisms in devastating ways, including feminization of males, alterations in mating behaviors, and disruption of sexual selection. Studies have shown 17α-ethinylestradiol (EE2) exposure to induce female-like secondary sexual traits in male Gulf pipefish, changing how females perceive affected males. We aimed to understan...
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Species exhibiting sex-role reversal provide an unusual perspective on the evolution of sex roles and sex differences. However, the proximate effects of sex-role reversal are largely unknown. Endocrine disruptors provide an experimental mechanism to address hormonal regulation of sexually dimorphic gene expression in sex-role-reversed taxa. Here, we investigate gene expression patterns in the l...
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Understanding how selection acts on traits individually and in combination is an important step in deciphering the mechanisms driving evolutionary change, but for most species, and especially those in which sexual selection acts more strongly on females than on males, we have no estimates of selection coefficients pertaining to the multivariate sexually selected phenotype. Here, we use a labora...
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The genetic mating system is a key component of the sexual selection process, yet methods for the quantification of mating systems remain controversial. One approach involves metrics derived from Bateman's principles, which are based on variances in mating and reproductive success and the relationship between them. However, these measures are extremely difficult to measure for both sexes in ope...
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تاریخ انتشار 2009