Behavioral Ecology and Sociobiology

, Volume 68, Issue 9, pp 1493–1504 | Cite as

Density dependence and habitat quality modulate the intensity of display territory defence in an exploded lekking species

  • Manuel B. Morales
  • Fabián Casas
  • Eladio García de la Morena
  • Anna Ponjoan
  • Gustau Calabuig
  • Jesús Martínez-Padilla
  • Jesús T. García
  • Santi Mañosa
  • Javier Viñuela
  • Gerard Bota
Original Paper

Abstract

We evaluated the effect of conspecific abundance and habitat quality of leks on the territorial behaviour of males in an exploded lekking species, the Little Bustard (Tetrax tetrax). The hypothesis that males more intensely defend territories with higher conspecific abundance and better habitat quality was evaluated experimentally analysing the agonistic response of experimental males to male decoys placed on their displaying areas. Decoy experiments showed that the intensity of display territory defence by little bustard males is density dependent. The time experimental males took to return to their display sites after decoy placement decreased with abundance of both males and females. The strength of their final response was positively associated to local male and female abundance in the vicinity of their display sites. Habitat quality also influenced males’ display territory defence since the intensity of male response increased with the degree of natural vegetation cover. Habitat quality was particularly relevant in explaining variation of experimental males’ snort call rate, which decreased with the degree in plough cover and increased with the number of fields in the lekking area. Snort call rate decreased with the level of male aggregation and was lowest in males exhibiting the strongest aggressive response to decoys. These results add new evidence for the density dependence of species’ breeding territorial behaviour, supporting density-dependent models of lek formation and reinforcing the role of resources defence in exploded lek mating systems.

Keywords

Aggressive behaviour Decoy experiments Fallows Resource defence Spain 

Supplementary material

265_2014_1758_MOESM1_ESM.docx (16 kb)
ESM 1(DOCX 15 kb)
265_2014_1758_MOESM2_ESM.docx (2.9 mb)
ESM 2(DOCX 2980 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Manuel B. Morales
    • 1
  • Fabián Casas
    • 2
    • 3
  • Eladio García de la Morena
    • 1
    • 4
  • Anna Ponjoan
    • 5
  • Gustau Calabuig
    • 2
  • Jesús Martínez-Padilla
    • 2
  • Jesús T. García
    • 2
  • Santi Mañosa
    • 6
  • Javier Viñuela
    • 2
  • Gerard Bota
    • 5
  1. 1.Grupo de Investigación en Ecología y Conservación de Sistemas Terrestres (TEG), Departamento de EcologíaUniversidad Autónoma de MadridMadridSpain
  2. 2.Instituto de Investigación en Recursos CinegéticosIREC (CSIC, UCLM, JCCM)Ciudad RealSpain
  3. 3.Estación Experimental de Zonas ÁridasLa Cañada de San UrbanoSpain
  4. 4.SECIMManzanares el RealSpain
  5. 5.Biodiversity and Animal Conservation Lab (BAC-Lab), Àrea de BiodiversitatCentre Tecnològic Forestal de CatalunyaSolsonaSpain
  6. 6.Departament de Biologia Animal, Institut de Recerca de la Biodiversitat (IRbio), Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain

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