Technical Report

El cuervo Corvus corax canariensis en el Parque Nacional del Teide (2019): seguimientos de muladares y de aves equipadas con dispositivos GPS-GSM

November 2019

Authors:

Grupo de Ornitología e Historia Natural de las islas Canarias

Beneharo Rodríguez

Grupo de Ornitología e Historia Natural de las islas Canarias

Grupo de Ornitología e Historia Natural de las islas Canarias

Esta asistencia técnica se ha desarrollado a petición del Parque Nacional del Teide, en el marco del encargo realizado a Gesplan, expediente 2017-161 de 17 de octubre de 2017, con acuerdo del Consejo de Gobierno Insular, Cabildo de Tenerife, denominado Seguimiento de Silene nocteolens y de diversos aspectos de la biología de Juniperus cedrus: censo poblacional, reconstrucción del paleoambiente y seguimiento de dispersores naturales (Corvus corax y Turdus torquatus). Y posterior modificación de fecha 20 de noviembre de 2018. Dentro de las actuaciones recogidas en el encargo mencionado se encuentra la Actuación 5: Seguimiento de la efectividad de los muladares.

El cuervo Corvus corax canariensis en el Parque Nacional del Teide (2022): seguimientos de muladares y de aves equipadas con dispositivos GPS-GSM

Technical Report

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Nov 2022

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Chemotaxonomy of corvidae. II. The uropygial gland secretion from the jay (Garrulus glandarius), mag...

June 1974 · Zeitschrift fur Naturforschung C

The uropygial gland fats from four species of the family Corvidae are found to be mainly mono ester waxes, which consist of mono-, di-, and trimethyl substituted fatty acids and n- and methyl-branched alcohols. The positions of all methyl brandlings are even-numbered, the 2-position is preferred. About 2 - 40% of the secretions consist of triester waxes: Alkyl-hydroxy-malonic acids esterified ... [Show full abstract] with n-fatty acids and n-alcohols. Waxes of this type are very common in the uropygial gland fats of birds and therefore, in opposite to the monoester waxes, they are not usable for a chemotaxo nomy of birds.

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Sequencing of the complete mitochondrial genome of the common raven Corvus corax (Aves: Corvidae) co...

October 2017 · PLoS ONE

Previous studies based on single mitochondrial markers have shown that the common raven (Corvus corax) consists of two highly diverged lineages that are hypothesised to have undergone speciation reversal upon secondary contact. Furthermore, common ravens are paraphyletic with respect to the Chihuahuan raven (C. cryptoleucus) based on mitochondrial DNA (mtDNA). Here we explore the causes of mtDNA ... [Show full abstract] paraphyly by sequencing whole mitochondrial genomes of 12 common ravens from across the Northern Hemisphere, in addition to three Chihuahuan ravens and one closely related brown-necked raven (C. ruficollis) using a long-range PCR protocol. Our raven mitogenomes ranged between 16925–16928 bp in length. GC content varied from 43.3% to 43.8% and the 13 protein coding genes, two rRNAs and 22 tRNAs followed a standard avian mitochondrial arrangement. The overall divergence between the two common raven clades was 3% (range 0.3–5.8% in 16 regions including the protein coding genes, rRNAs and the control region). Phylogenies constructed from whole mitogenomes recovered the previously found mitochondrial sister relationship between the common raven California clade and the Chihuahuan raven (overall divergence 1.1%), which strengthens the hypothesis that mtDNA paraphyly in the common raven results from speciation reversal of previously distinct Holarctic and California lineages.

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Place des insectes dans le régime alimentaire du Grand Corbeau Corvus corax (Aves, Corvidae) dans la...

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Differences in Space Use by Common Ravens in Relation to Sex, Breeding Status, and Kinship (Diferenc...

August 2012 · The Condor

Group differences in avian space use relate to group differences in resource use and demographic parameters. However, studies that consider year-round, intraspecific variation in the space use of noncooperatively breeding species are relatively rare. A greater understanding of factors relating to intraspecific variation in space use is especially important for managing human-subsidized predators, ... [Show full abstract] such as the Common Raven (Corvus corax). We hypothesized that sex, sociality, and the distribution of bonanzas of food should influence year-round space use by breeding and nonbreeding Common Ravens on the Olympic Peninsula of Washington State. We detected differences in space use between breeders and nonbreeders but not between the sexes. Breeders shared little space with their neighbors and displayed strong site fidelity, except in the fall and winter or after the death of a mate, when some breeding ravens moved extensively. Nonbreeders moved widely, were more gregarious, and their home ranges intersected a greater proportion of communal food resources than did those of breeders. Breeders shared little space with their adult neighbors, but they shared more space with nonbreeders when communal food resources fell within their territories. Pair bonds were broken only by the death of a partner, which in some cases was followed by extensive movements by the surviving adult prior to pairing with a new mate or settling in a new breeding territory. This study is the first to consider the space use of both nonbreeding and breeding Common Ravens in the same population simultaneously.