TITLE

Intra-sexual competition modulates calling behavior and its association with secondary sexual traits

AUTHOR(S)
Tarjuelo, Rocío; Vergara, Pablo; Martínez-Padilla, Jesús
PUB. DATE
October 2016
SOURCE
Behavioral Ecology & Sociobiology;Oct2016, Vol. 70 Issue 10, p1633
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The expression of elaborate sexual displays is associated with individual quality ensuring reliable information about the bearers. However, the associated cost of expressing enhanced sexual traits is expected to change according to environmental circumstances. Specifically, the cost of maintaining or producing a signal is predicted to increase when environmental conditions are unfavorable, which may lead to a reduction in signal expression as shown in several species. Here, we compared the calling behavior of male red grouse Lagopus lagopus scoticus living in an area of experimentally increased intra-sexual competition to that of males living in a control area. Levels of intra-sexual competition were experimentally manipulated by testosterone implants in a subset of captured males. In addition, we compared the association between two sexual traits, calling behavior and comb size, of males living in these two areas. Although call frequency was not affected by different levels of intra-sexual competition, males from the control area performed shorter calls than individuals from the treatment area. Additionally, a positive association between comb size and call duration was found only for males in the area of lower aggressiveness. We suggest that environmental conditions influence the expression of multiple plastic sexual traits, depending on the costs and the information conveyed about different individual qualities. Significance statement: Although sexual signals are considered reliable indicators of individual quality, environmental heterogeneity may modulate their expression and reliability. We experimentally manipulated levels of intra-sexual competition in a wild population of red grouse by increasing testosterone levels using implants in a subset of males. We observed that the social context shapes the expression of sexual traits. In less competitive conditions, males performed shorter calls and call length was positively related to the size of the supra-orbital comb, a relevant secondary sexual trait. Under higher intra-sexual competition, this relationship was decoupled and investment was directed at increasing call length.
ACCESSION #
118060026

 

Related Articles

  • FORCED COPULATIONS AND COERCION IN BORNEAN ORANGUTANS. Knott, C.; Stumpf, R.; Kahlenberg, S.; Thompson, M. Emery // International Journal of Primatology;Feb2006 Supplement, Vol. 27, p146 

    The article presents the abstract of the paper "Forced Copulations and Coercion in Bornean Orangutans," by C. Knott and colleagues to be presented at the 21st Congress of the International Primatological Society in Entebbe, Uganda from June 25-30, 2006.

  • Care of young, aggressiveness, and secretion of testosterone in male rodents: A correlation analysis. Gromov, V.; Voznesenskaya, V. // Biology Bulletin;Sep2013, Vol. 40 Issue 5, p463 

    To test the current hypotheses on the relationship between the mating system, reproductive strategy, aggression, and secretion of testosterone, a comparative study of interactions in pair encounters, the level of parental care, and the gonadal testosterone level in males was performed in six...

  • Pre- and post-copulatory mate choice in Platygryllus primiformis: cryptic female choice and sexual conflict. Parker, Darren // Bioscience Horizons: The National Undergraduate Research Journal;Jun2009, Vol. 2 Issue 2, p164 

    The effect of sexual conflict upon mating systems is a controversial topic. The aim of this study was to determine whether post-copulatory choice by females (spermatophore removal) reinforces pre-copulatory choice with respect to male body size and fighting ability, and whether such...

  • A Newly Uncovered Phenotype Associated with the fruitless Gene of Drosophila melanogaster: Aggression-like Head Interactions Between Mutant Males. Lee, Gyunghee; Hall, Jeffrey C. // Behavior Genetics;Jul2000, Vol. 30 Issue 4, p263 

    Male sexual behavior is regulated by the sex-determination hierarchy (SDH) in Drosophila melanogaster. The fruitless (fru) gene, one of the regulatory factors functioning downstream of other SDH factors, plays a prominent role in male sexual behavior. Here we demonstrate that fru mutations cause...

  • Neurochemistry as a bridge between morphology and behavior: Perspectives on aggression in insects. BUBAK, Andrew N.; GRACE, Jaime L.; WATT, Michael J.; RENNER, Kenneth J.; SWALLOW, John G. // Current Zoology;2014, Vol. 60 Issue 6, p778 

    Aggression is a common behavioral trait shared in many animals, including both vertebrates and invertebrates. However, the type and intensity of agonistic encounters and displays can vary widely both across and within species, resulting in complicated or subjective interpretations that create...

  • Evolution: Male harassment can doom species.  // Nature;6/23/2011, Vol. 474 Issue 7352, p423 

    The article focuses on the research models of Daniel Rankin and colleagues from the University of Zurich in Switzerland which suggest that the behaviours of many male species that are harmful to females during courting or mating can lead to a so-called tragedy of commons, or a decrease among the...

  • Testosterone and Aggression in Birds. Wingfield, John C.; Ball, Gregory F.; Dufty Jr., Alfred M.; Hegner, Robert E.; Ramenofsky, Marilyn // American Scientist;Nov/Dec87, Vol. 75 Issue 6, p602 

    Considers the complexities of aggressive behaviors and their regulation, focusing specifically on species differences in territorial behavior of male birds as models for the multiple interactions of hormones, environment and behavior. Secretion of testosterone by interstitial cells in the...

  • Feathered castrati. Wingfield, John C. // American Scientist;Mar/Apr88, Vol. 76 Issue 2, p125 

    Responds to Michael Erpino's comment on the author's paper "Testosterone and Aggression in Birds".

  • Do females influence paternal responsiveness in male prairie voles Microtus ochrogaster by increasing the salience of infant odors? LANG YAMOAH, Damaris-Lois; LARYEA, Wilhemina; FASSIL, Fiker; BAMSHAD, Maryam // Current Zoology;2013, Vol. 59 Issue 3, p317 

    Male prairie voles become more responsive to infants following cohabitation with a female. Exposure to female sensory cues prior to offspring birth may influence male paternal tendencies by modifying his response to infant odors in particular or to odors in general. To test these hypotheses,...

  • Aspects of Male Competition in Colobus vellerosus: Preliminary Data on Male and Female Loud Calling, and Infant Deaths After a Takeover. Sicotte, Pascale; Teichroeb, Julie A.; Saj, Tania L. // International Journal of Primatology;Jun2007, Vol. 28 Issue 3, p627 

    Male Colobus vellerosus are the main participants in intergroup encounters, and lead incursions in neighboring groups during which they attack infants. Extragroup copulations, all-male groups, and male takeover occur in the species. Here, we provide additional information on behaviors associated...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics