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Pigment-based skin colour in the blue-footed booby: an honest signal of current condition used by females to adjust reproductive investment
The data indicate that blue-footed booby females are continuously evaluating their mates and can perform rapid adjustments of reproductive investment by using dynamic sexual traits, and suggests that this fine-tuned adjustment may be widespread in socially monogamous animals. Expand
Senescent birds redouble reproductive effort when ill: confirmation of the terminal investment hypothesis
- A. Velando, H. Drummond, R. Torres
- Biology, Medicine
- Proceedings of the Royal Society B: Biological…
- 22 June 2006
It is demonstrated that senescent males with poor reproductive prospects increase their effort when those prospects are threatened, whereas younger males with good reproductive prospects do not. Expand
A three-isotope approach to disentangling the diet of a generalist consumer: the yellow-legged gull in northwest Spain
This work used a Bayesian triple-isotope mixing model to reconstruct the diet of a generalist predator, the yellow-legged gull, and highlights the potential of adding δ34S for distinguishing not only between terrestrial and marine prey, but also between different marine species such as fish, crabs and mussels. Expand
Intercolony and seasonal differences in the breeding diet of European shags on the Galician coast (NW Spain)
The consumption of sandeels established an increased similarity in diet between the colonies throughout the breeding cycle, and they were the only prey whose abundance was negatively correlated with the diversity of each pellet. Expand
Differential body condition regulation by males and females in response to experimental manipulations of brood size and parental effort in the blue‐footed booby
Results revealed that blue-footed boobies have a sex-specific body mass regulation, and below a critical level, females preferentially allocated resources to the maintenance of their body condition at the expense of investment in current reproduction. Expand
Avoiding bad genes: oxidatively damaged DNA in germ line and mate choice.
- A. Velando, R. Torres, C. Alonso-Alvarez
- Biology, Medicine
- BioEssays : news and reviews in molecular…
- 1 November 2008
The hypothesis that females are able to avoid males with oxidatively damaged DNA in the germ line by using oxidative-dependent (pre- and post-mating) signals is proposed, which may shed light on unsolved questions in evolutionary biology. Expand
Are Eisenia fetida (Savigny, 1826) and Eisenia andrei (Oligochaeta, Lumbricidae) different biological species?
The interspecific and intraspecific crosses confirmed that there is reproductive isolation between E. fetida and E. andrei ; they can be considered distinct biological species with different life histories and implies some important considerations; in vermiculture or vermicomposting E.andrei is more recommended since its growth and reproduction rates are higher. Expand
Experimental manipulation of maternal effort produces differential effects in sons and daughters: implications for adaptive sex ratios in the blue-footed booby
- A. Velando
- 1 July 2002
The results suggest that the variation in the sex ratio in blue-footed boobies is an adaptive response to the disadvantage daughters face from being reared under poor conditions. Expand
HOW GENERAL IS THE CENTRAL-PERIPHERY DISTRIBUTION AMONG SEABIRD COLONIES? NEST SPATIAL PATTERN IN THE EUROPEAN SHAG
Abstract The central-periphery distribution model of nest dispersion suggests that nests located in the center of a colony are less accessible to predators and that birds breeding in the central area… Expand
Male reproductive senescence: the price of immune-induced oxidative damage on sexual attractiveness in the blue-footed booby.
It is shown that a sexual signal (foot colour) declines with age, due probably to the deleterious effects of oxidative damage, which supports the idea that oxidative stress affects reproductive senescence and suggests that oxidative damage might be a proximal mechanism underlying age-reproductive patterns in long-lived animals. Expand