scholarly journals Significance of temporal and spectral acoustic cues for sexual recognition in Xenopus laevis

2006 ◽  
Vol 274 (1609) ◽  
pp. 479-488 ◽  
Author(s):  
Clémentine Vignal ◽  
Darcy Kelley
Keyword(s):  
Xenopus Laevis ◽  
Sexual Identity ◽  
Carrier Frequency ◽  
Temporal Pattern ◽  
Acoustic Cues ◽  
Male And Female ◽  
Identity Recognition ◽  
Vocal Responses ◽  
Spectral Cues ◽  
Sexual Recognition

As in many anurans, males of the totally aquatic species, Xenopus laevis , advertise their sexual receptivity using vocalizations. Unusually for anurans, X. laevis females also advertise producing a fertility call that results in courtship duets between partners. Although all X. laevis calls consist of repetitive click trains, male and female calls exhibit sex-specific acoustic features that might convey sexual identity. We tested the significance of the carrier frequency and the temporal pattern of calls using underwater playback experiments in which modified calls were used to evoke vocal responses in males. Since males respond differently to male and female calls, the modification of a key component of sexual identity in calls should change the male's response. We found that a female-like slow call rhythm triggers more vocal activity than a male-like fast rhythm. A call containing both a female-like temporal pattern and a female-like carrier frequency elicits higher levels of courtship display than either feature alone. In contrast, a male-like temporal pattern is sufficient to trigger typical male–male encounter vocalizations regardless of spectral cues. Thus, our evidence supports a role for temporal acoustic cues in sexual identity recognition and for spectral acoustic cues in conveying female attractiveness in X. laevis .

Speech Perception in Adult Subjects With Familial Dyslexia

1992 ◽  
Vol 35 (1) ◽  
pp. 192-200 ◽  
Author(s):  
Michele L. Steffens ◽  
Rebecca E. Eilers ◽  
Karen Gross-Glenn ◽  
Bonnie Jallad
Keyword(s):  
Steady State ◽  
Speech Perception ◽  
Synthetic Speech ◽  
Acoustic Cues ◽  
State Dynamic ◽  
Spectral Cues ◽  
Temporal Cues ◽  
Familial Dyslexia ◽  
Overall Performance

Speech perception was investigated in a carefully selected group of adult subjects with familial dyslexia. Perception of three synthetic speech continua was studied: /a/-//, in which steady-state spectral cues distinguished the vowel stimuli; /ba/-/da/, in which rapidly changing spectral cues were varied; and /sta/-/sa/, in which a temporal cue, silence duration, was systematically varied. These three continua, which differed with respect to the nature of the acoustic cues discriminating between pairs, were used to assess subjects’ abilities to use steady state, dynamic, and temporal cues. Dyslexic and normal readers participated in one identification and two discrimination tasks for each continuum. Results suggest that dyslexic readers required greater silence duration than normal readers to shift their perception from /sa/ to /sta/. In addition, although the dyslexic subjects were able to label and discriminate the synthetic speech continua, they did not necessarily use the acoustic cues in the same manner as normal readers, and their overall performance was generally less accurate.

WRITING THE MODERN HISTORIES OF HOMOSEXUAL ENGLAND

2009 ◽  
Vol 52 (1) ◽  
pp. 213-233 ◽  
Author(s):  
BARRY REAY
Keyword(s):  
Sexual Identity ◽  
Same Sex ◽  
Male And Female ◽  
Sexual Histories ◽  
Queer History ◽  
Men And Masculinity

ABSTRACTThe most useful sexual histories are those that provide depth of context without either assuming sexual identity or anticipating its complete absence; those that do not force taxonomies; histories that resist any simple teleological account of a shift from ‘homosexuality’ as sexual excess to the homosexual as a species. This review examines attempts to write such histories – what has recently been termed the ‘new British queer history’. I will focus on some strands of male and female same-sex desires and their expression in England in the nineteenth and early twentieth centuries: male and female same-sex friendships, effeminacy in men and masculinity in women; and representations of lesbianism. This review discusses these histories of desires that resist present-day sexual assumptions.

androgyny

2017 ◽  
Author(s):  
Luc Brisson
Keyword(s):  
Sexual Identity ◽  
Ancient Greece ◽  
The Other ◽  
Human Beings ◽  
Men And Women ◽  
Male And Female ◽  
Object Choice ◽  
The One ◽  
Sexual Object

In the modern use, “bisexuality” refers to sexual object choice, whereas “androgyny” refers to sexual identity. In ancient Greece and Rome, however, these terms sometimes refer to human beings born with characteristics of both sexes, and more frequently to an adult male who plays the role of a woman, or to a woman who has the appearance of a man, both physically and morally. In mythology, having both sexes simultaneously or successively characterises, on the one hand, the first human beings, animals, or even plants from which arose male and female, and on the other, mediators between human beings and gods, the living and the dead, men and women, past and future, and human generations. Thus androgyny and bisexuality were used as a tools to cope with one’s biological, social, and even fictitious environment.

Silvandre's Symposium: The Platonic and the Ambiguous in L'Astrée

1999 ◽  
Vol 52 (3) ◽  
pp. 782-804
Author(s):  
Laurence A. Gregorio
Keyword(s):  
Sexual Identity ◽  
Middle Ground ◽  
Male And Female ◽  
Magnetic Theory ◽  
Intended Effect ◽  
Ideological Context ◽  
Thematic Plan

AbstractImprecision appears to be the intended effect of the thematic plan of Honoré d'Urfé's L'Astrée, especially where signs of sexual identity are concerned. This study proposes a reading which, on two bases, accommodates the romance's semiotic vagueness. First, the ideological context of Neoplatonism clarifies the work's ongoing "Symposium" on love. The roots of this dialogue may be traced to Plato's Symposium and magnetic theory which foreshadow L'Astreé's tendency toward character self-representation on a middle ground between male and female. Second, evidence of a structure of ambiguity in other areas of the romance's composition corroborates the argument.

scholarly journals Desbordando el género y el sexo

2017 ◽  
pp. 417
Author(s):  
Claudia Truzzoli
Keyword(s):  
Sexual Identity ◽  
Option Value ◽  
Real Thing ◽  
Men And Women ◽  
Male And Female ◽  
Clear Separation ◽  
The Real ◽  
Biological Sex ◽  
Rigid Frames ◽  
The Difference

<p><strong>Resumen</strong></p><p>Ni el género ni la sexualidad se dejan encorsetar dentro de unas normas que informan cómo deben ser y actuar hombres y mujeres para ser reconocidos socialmente como normales. Tanto el género como el sexo son susceptibles de desbordamiento de dichos encuadres rígidos, porque tal desbordamiento responde a lo real vivenciado por cualquier hombre o mujer. Las normas son un constructo artificial que no responde a la auténtica identidad genérica y sexual de cada sujeto, que es mucho más compleja que el reduccionismo monolítico que quiere demarcar la diferencia entre masculino y femenino. Dicha separación tan tajante no puede explicar la coexistencia de ambas características en un mismo sujeto ni las pretensiones de los transgéneros de ser considerados con una identidad que desmiente su sexo biológico, ni la angustia de los transexuales convencidos de estar atrapados en un cuerpo equivocado.</p><p> </p><p><strong>Abstract</strong><strong><br /> </strong>Neither gender nor sexuality is allowed to be curtailed within norms that inform how men and women should be and act to be socially recognized as normal. Both gender and sex are susceptible to overflowing of such rigid frames, because such an overflow responds to the real thing experienced by any man or woman. Norms are an artificial construct that does not respond to the authentic generic and sexual identity of each subject, which is much more complex than the monolithic reductionism that wants to demarcate the difference between male and female. Such a clear separation can not explain the coexistence of both characteristics in the same subject nor the claims of transgenders to be considered with an identity that belies their biological sex, nor the anguish of transsexuals convinced to be trapped in a wrong body.</p><div id="SLG_balloon_obj" style="display: block;"><div id="SLG_button" class="SLG_ImTranslatorLogo" style="background: url('chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/img/util/imtranslator-s.png'); display: none; opacity: 1;"> </div><div id="SLG_shadow_translation_result2" style="display: none;"> </div><div id="SLG_shadow_translator" style="display: none;"><div id="SLG_planshet" style="background: url('chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/img/util/bg2.png') #f4f5f5;"><div id="SLG_arrow_up" style="background: url('chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/img/util/up.png');"> </div><div id="SLG_providers" style="visibility: hidden;"><div id="SLG_P0" class="SLG_BL_LABLE_ON" title="Google">G</div><div id="SLG_P1" class="SLG_BL_LABLE_ON" title="Microsoft">M</div><div id="SLG_P2" class="SLG_BL_LABLE_ON" title="Translator">T</div></div><div id="SLG_alert_bbl"> </div><div id="SLG_TB"><div id="SLG_bubblelogo" class="SLG_ImTranslatorLogo" style="background: url('chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/img/util/imtranslator-s.png');"> </div><table id="SLG_tables" cellspacing="1"><tr><td class="SLG_td" align="right" width="10%"><input id="SLG_locer" title="Fijar idioma" type="checkbox" /></td><td class="SLG_td" align="left" width="20%"><select id="SLG_lng_from"><option value="auto">Detectar idioma</option><option value="">undefined</option></select></td><td class="SLG_td" align="center" width="3"> </td><td class="SLG_td" align="left" width="20%"><select id="SLG_lng_to"><option value="">undefined</option></select></td><td class="SLG_td" align="center" width="21%"> </td><td class="SLG_td" align="center" width="6%"> </td><td class="SLG_td" align="center" width="6%"> </td><td class="SLG_td" align="center" width="6%"> </td><td class="SLG_td" align="center" width="6%"> </td><td class="SLG_td" width="10%"> </td><td class="SLG_td" align="right" width="8%"> </td></tr></table></div></div><div id="SLG_shadow_translation_result" style="visibility: visible;"> </div><div id="SLG_loading" class="SLG_loading" style="background: url('chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/img/util/loading.gif');"> </div><div id="SLG_player2"> </div><div id="SLG_alert100">La función de sonido está limitada a 200 caracteres</div><div id="SLG_Balloon_options" style="background: url('chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/img/util/bg3.png') #ffffff;"><div id="SLG_arrow_down" style="background: url('chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/img/util/down.png');"> </div><table width="100%"><tr><td align="left" width="18%" height="16"> </td><td align="center" width="68%"><a class="SLG_options" title="Mostrar opciones" href="chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/html/options/options.html?bbl" target="_blank">Opciones</a> : <a class="SLG_options" title="Historial de traducciones" href="chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/html/options/options.html?hist" target="_blank">Historia</a> : <a class="SLG_options" title="ImTranslator Ayuda" href="http://about.imtranslator.net/tutorials/presentations/google-translate-for-opera/opera-popup-bubble/" target="_blank">Ayuda</a> : <a class="SLG_options" title="ImTranslator Feedback" href="chrome-extension://mchdgimobfnilobnllpdnompfjkkfdmi/content/html/options/options.html?feed" target="_blank">Feedback</a></td><td align="right" width="15%"><span id="SLG_Balloon_Close" title="Cerrar">Cerrar</span></td></tr></table></div></div></div>

Sexual recognition and anticuckoldry behaviour in savannah sparrows

1980 ◽  
Vol 58 (6) ◽  
pp. 991-996 ◽  
Author(s):  
Patrick J. Weatherhead ◽  
Raleigh J. Robertson
Keyword(s):  
Breeding Season ◽  
Temperature Dependent ◽  
Male And Female ◽  
Female Model ◽  
Male Model ◽  
Sexual Recognition ◽  
Savannah Sparrows ◽  
Nest Initiation

Models of male and female savannah sparrows were presented 179 times in 11 territories through the breeding season. Detection of the models was highly temperature dependent. Using only trials in which the models were detected it was found that before nest initiation both models were treated as male, whereas during the early nesting period the male model was treated as male and the female model was treated as female. Later in the nesting period both models were treated as female although the female elicited stronger responses. These results are interpreted as consistent with predicted anticuckoldry behaviour by breeding males.

Sperm competition: evolutionary causes and consequences

1995 ◽  
Vol 7 (4) ◽  
pp. 755 ◽  
Author(s):  
TR Birkhead
Keyword(s):  
Sperm Competition ◽  
Zebra Finch ◽  
Female Choice ◽  
Temporal Pattern ◽  
Cryptic Female Choice ◽  
Optimal Time ◽  
Optimal Timing ◽  
Sperm Precedence ◽  
Male And Female ◽  
Ejaculate Size

The interaction between functional and mechanistic approaches to sperm competition and between male and female perspectives are described and illustrated by a study of the zebra finch, Taeniopygia guttata. Sperm competition experiments in the laboratory show that last male sperm precedence occurs (as it does in many other taxa) although the mechanism is unknown (as in most other taxa). Empirically-derived values were used to construct a mathematical model of sperm competition in the zebra finch. The model indicates that precedence occurs as a consequence of: (i) the temporal pattern of pair copulations; (ii) the rate at which sperm are lost from the female tract; and (iii) more sperm being transferred during extra-pair copulations than during pair copulations. The latter effect is a consequence of males seeking extra-pair copulations after their own pair copulation period has ended. The effect of sperm numbers on the pattern of sperm precedence may be further increased by: (i) extra-pair males increasing ejaculate size (sperm numbers) (for which there is no evidence); (ii) extra-pair males being of a better quality and transferring more sperm or better quality sperm (for which there is some evidence); and (iii) cryptic female choice. Females eject over 99% of sperm following insemination; if they eject fewer sperm from males chosen as extra-pair copulation partners, the potential for cryptic female choice is considerable. However, this is still being investigated. The model also predicts the optimal time for an extra-pair copulation to occur (from either a male or female perspective). A comparison between the predicted and observed pattern suggests that the optimal timing of extra-pair copulations is constrained in both sexes.

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