J. J. Negro

Publications187
h-index49
Citations6,792
Highly Influential Citations402
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Foraging habitat selection, land-use changes and population decline in the lesser kestrel Falco naumanni
TLDR
The selection of foraging habitats by nine radio-tagged adult lesser kestrels breeding in one colony in southern Spain, was studied in 1989 and 1990 and there was a general tendency for grassland to be used more, and sunflower and woodlots to beused less, than expected by their availability.
An overlooked DNA source for non‐invasive genetic analysis in birds
TLDR
It was found that feather clots from museum specimens provided results nearly as good as footpad and better than those from the more commonly used museum skin snips.
Remotely Piloted Aircraft Systems as a Rhinoceros Anti-Poaching Tool in Africa
TLDR
It is demonstrated that low cost RPAS can be useful for rhinoceros stakeholders for field control procedures and considering not only the technical capabilities of the systems but also the poacher modus operandi and the current control methods, RPAS usage is proposed.
Regulation of integumentary colour and plasma carotenoids in American Kestrels consistent with sexual selection theory
TLDR
The results suggest kestrels may have the ability to regulate (rather than merely control) their colour physiologically, the variation in colour and carotenoids is consistent with that expected of a sexually selected trait, and the loss of colour after breeding may suggest a trade-off between the show and health functions of carOTenoids.
Characterization, Polymorphism, and Evolution of MHC Class II B Genes in Birds of Prey
TLDR
This study characterized MHC class II B genes in five families of birds of prey and identified 21 positively selected amino acid sites, which suggests that the MHC genes described here are functional and probably expressed.
Population genetics after fragmentation: the case of the endangered Spanish imperial eagle (Aquila adalberti)
TLDR
How management strategies should aim at the maintenance of current genetic variability levels and the avoidance of inbreeding depression through the connection of the different nuclei is discussed.
The Near Extinction of Two Large European Predators: Super Specialists Pay a Price
Abstract:  Despite recovery plans, the Spanish Imperial Eagle (Aquila adalberti) and the Iberian lynx (Lynx pardinus) are in danger of extinction. These two flagship species tend to occur in pristine…
Multiple ways to become red: pigment identification in red feathers using spectrometry.
Phylogeography, genetic structure and diversity in the endangered bearded vulture (Gypaetus barbatus, L.) as revealed by mitochondrial DNA
TLDR
The results argue for the management of the bearded vulture species as a single population, given the apparent ecological exchangeability of extant stocks, and support the ongoing reintroduction of mixed ancestry birds in the Alps and planned reintroductions in Southern Spain.
Ecological, morphological and phylogenetic correlates of interspecific variation in plasma carotenoid concentration in birds
TLDR
The acquisition of carotenoids from the diet and their use for both health and display functions seem to be constrained by ecological and physiological aspects linked to the phylogeny and size of the species.
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