Search results for "monogamy"
showing 8 items of 8 documents
Pairing context determines condition-dependence of song rate in a monogamous passerine bird.
2013
Condition-dependence of male ornaments is thought to provide honest signals on which females can base their sexual choice for genetic quality. Recent studies show that condition-dependence patterns can vary within populations. Although long-term association is thought to promote honest signalling, no study has explored the influence of pairing context on the condition-dependence of male ornaments. In this study, we assessed the influence of natural variation in body condition on song rate in zebra finches ( Taeniopygia guttata ) in three different situations: during short and long encounters with an unfamiliar female, and within heterosexual mated pairs. We found consistent individual diff…
Sex roles and the evolution of parental care specialization
2019
Males and females are defined by the relative size of their gametes (anisogamy), but secondary sexual dimorphism in fertilization, parental investment and mating competition is widespread and often remarkably stable over evolutionary timescales. Recent theory has clarified the causal connections between anisogamy and the most prevalent differences between the sexes, but deviations from these patterns remain poorly understood. Here, we study how sex differences in parental investment and mating competition coevolve with parental care specialization. Parental investment often consists of two or more distinct activities (e.g. provisioning and defence) and parents may care more efficiently by s…
Diversité génétique individuelle, différenciation morphologique et comportementale entres les sexes, patterns d'appariement et paramètres démographiq…
2013
Research in avian behavioral ecology is affected by a known bias in favour of temperate species despite the greatest diversity of tropical species and the radically remote natural conditions which make knowledge of temperate species hardly relevant to tropical species.We propose to reduce the lack of information about tropical birds through the study of a socially monogamous species, reproducing and defending an all-purpose territory all year round, the Zenaida dove, Zenaida aurita. We used monitoring data from a population of ringed birds in Barbados for six years. First, we focused on plumage coloration both to ascertain their sexually mono- or dichromatic nature and whether plumage colou…
A mate to die for? A model of conditional monogyny in cannibalistic spiders.
2012
Monogynous males in various species actively limit themselves to mating with a single female in their lifetime. Whereas previous models have considered monogyny as an obligate mating strategy, here we explore the potential of monogyny to evolve as a context-specific (conditional) behavior. Using a state-dependent dynamic game model based on the biology of the cannibalistic spider Argiope bruennichi, we confirm that conditional monogyny can evolve under broad conditions, including an even sex ratio. We predict that males should make a terminal investment when mating with large, virgin females, especially if population density is low and the encounter occurs late in the season. We encourage e…
Differences in Motivation to Engage in Sexual Activity Between People in Monogamous and Non-monogamous Committed Relationships
2021
This study compared motivations to engage in sex between monogamous and non-monogamous respondents (n = 1,238, out of which 641 monogamous and 596 non-monogamous respondents; women—47.4%, men—50.9%, other gender—1.7%; age: M = 27.78 years, SD = 7.53, range = 18–62). The research aim was to identify whether there are differences in self-reported reasons to engage in sexual activity between these two groups. Presented with 17 reasons to engage in sexual activity, the respondents rated the frequency with which they engage in sex for each reason. While both monogamous and non-monogamous respondents reported to engage in sex with the same frequency for the reasons of sexual release and physical …
Partnerattiecībās esošu pieaugušo pamatojums iesaistīties monogāmās, konsensuāli un nekonsensuāli nemonogāmās seksuālās attiecībās
2020
Pētījuma mērķis bija noteikt, vai pastāv statistiski nozīmīgas atšķirības pamatojumā iesaistīties seksuālās attiecībās monogāmo un nemonogāmo respondentu grupās un vai nemonogāmo personu grupā pastāv statistiski nozīmīgas atšķirības pamatojumā iesaistīties seksuālās attiecībās ar saviem dažādajiem partneriem. Lai izpētītu motivāciju iesaistīties seksuālās attiecībās monogāmo, nekonsesnuāli nemonogāmo, konsensuāli nemonogāmo (poliamoro, svingeru un atvērto attiecību) pārstāvju grupās, tika izmantota modificētā un papildinātā YSEX? aptauja (Meston & Buss, 2007). Pētījuma ietvaros tika iegūtas atbildes uz abiem jautājumiem – vairākumā no modificētas YSEX? aptaujas jautājumiem pastāv statistisk…
Bisexual desires for more than one gender as a challenge to normative relationship ideals
2018
Normative western understandings of intimate relationships continue to draw upon the discourses of romantic love and the ideal of finding ‘the one’ who meets all our romantic and sexual needs. As desire is not sexually or emotionally exclusive, even people in normative relationships have to make sense of desires beyond the monogamous ideal. Bisexual people engage in these negotiations from a challenging cultural position. As a desire for more than one gender, bisexuality is persistently culturally associated with wavering desire, promiscuity and multiple partners. In light of these cultural conditions, I explore how Finnish bisexual women – and their (ex-)partners of various genders who do …
Similar and equal relationships? Negotiating bisexuality in an enduring relationship
2015
In the public debate in Finland, same-sex couples’ right to legal recognition is routinely defended by stressing their sameness to heterosexual couples within the discourse of romantic love. This article explores how bisexual women and their partners use these discourses. The five couple interviews were analyzed by implementing discourse analysis. The results highlight how, when taking positions within the discourse of the enduring couple relationship, the interviewees drew on the discourse of romantic love. Woman’s bisexuality disappeared easily in this talk. Although it seemed effortless at first sight, negotiations and affective tensions arose when the interviewees tried to fit their re…