• Publications
  • Influence
Plant Species Richness and Ecosystem Multifunctionality in Global Drylands
TLDR
A global empirical study relating plant species richness and abiotic factors to multifunctionality in drylands, which collectively cover 41% of Earth’s land surface and support over 38% of the human population, suggests that the preservation of plant biodiversity is crucial to buffer negative effects of climate change and desertification in dryland. Expand
Seasonal variation in sex ratio and sexual egg dimorphism favouring daughters in first clutches of the spotless starling
TLDR
A seasonal shift in sex ratio from daughters to sons as the season advances is found and eggs containing female embryos are significantly heavier than those containing males in spite of the slight sexual dimorphism in favour of males. Expand
The cost of producing a sexual signal: testosterone increases the susceptibility of male lizards to ectoparasitic infestation
Alfredo Salvador, Jose P. Veiga," Jose Martin,*'' Pilar Lopez,* Maria Abelenda, and Marisa Puerta Departamento de Ecologia Evolutiva, Museo Nacional de Ciencias Naturales, C.S.I.C., J. GutierrezExpand
Experimentally increased testosterone affects social rank and primary sex ratio in the spotless starling
TLDR
The results suggest that added testosterone had a direct role on the acquisition and maintenance of high social rank in female spotless starlings before egg formation and the maintenance of sex ratio differences long after having being implanted. Expand
Fitness Consequences of Increased Testosterone Levels in Female Spotless Starlings
TLDR
Differences in population density and female‐female competition are likely to alter the fitness landscape of this trait and change the adaptiveness of increased testosterone as a component of female reproductive strategies. Expand
BADGE SIZE, PHENOTYPIC QUALITY, AND REPRODUCTIVE SUCCESS IN THE HOUSE SPARROW: A STUDY ON HONEST ADVERTISEMENT
  • J. Veiga
  • Biology, Medicine
  • Evolution; international journal of organic…
  • 1 August 1993
TLDR
Results indicate that badge size functions as an honest signal, possibly because there are costs involved in its production, and that cheating has no selective benefit. Expand
Reproductive effort affects immune response and parasite infection in a lizard : a phenotypic manipulation using testosterone
TLDR
The results suggest that higher investment in reproduction decreases the immune defences, and conduces to the use of structural resources, which may render individuals more susceptible to some haemoparasites. Expand
Hatching Asynchrony in the House Sparrow: A Test of the Egg-Viability Hypothesis
  • J. Veiga
  • Biology
  • The American Naturalist
  • 1 March 1992
TLDR
The egg-viability hypothesis is presented, suggesting that hatching is asynchronous because parents must start incubation before the clutch is complete to avoid the death of the embryos that can occur when eggs remain unattended during the egg-laying period. Expand
Nutritional constraints determine the expression of a sexual trait in the house sparrow, Passer domesticus
  • J. Veiga, M. Puerta
  • Biology
  • Proceedings of the Royal Society of London…
  • 22 February 1996
TLDR
The hypothesis that the black throat badge of male house sparrows functions as an honest signal of condition because it is nutritionally costly to produce is addressed, giving support for the hypothesis that badges are costly to production, though the magnitude of the costs may be age dependent. Expand
Correlates of reproductive success in male lizards of the alpine species Iberolacerta cyreni
TLDR
No negative correlation between present reproduction and future survival was found, which suggests that male investment in reproduction is condition dependent and positively correlated with the ability to pay the underlying costs of increased activity. Expand
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