Felipe Siverio

Grupo de Ornitología e Historia Natural de las islas Canarias | GOHNIC

Territory spacing and breeding rates of an insular population (north-western Tenerife, Canary Islands) of Barbary Falcon Falco peregrinus pelegrinoides was studied from 1993 to 2008. The population increased constantly since the outset, from two pairs in 1993 to 12 in 2008. Mean density was 5.48 pairs per 100 km and mean nearest neighbour distance...

Islands, and the particular organisms that populate them, have long fascinated biologists. Due to their isolation, islands offer unique opportunities to study the effect of neutral and adaptive mechanisms in determining genomic and phenotypical divergence. In the Canary Islands, an archipelago rich in endemics, the barn owl (Tyto alba), present in...

During 2015 and 2016, we conducted the first systematic study of the size of the breeding population, distribution, habitat and diet of the Barbary Falcon Falco peregrinus pelegrinoides on La Palma, Canary Islands. We found a minimum of 28 territories (3.9 territories/100 km2) at an average distance of 3.6 km (range 1.7–7.7 km) from their nearest n...

Petrels are particularly sensitive to predation by introduced species. Many populations have reduced their breeding ranges, currently mainly occupying predator-free sites. Breeding range reduction leads to interspecific competition for nesting sites, which can be detrimental to petrels. Here, we evaluate how the presence of introduced mammals (cats...

Islands, and the particular organisms that populate them, have long fascinated biologists. Due to their isolation, islands offer unique opportunities to study the effect of neutral and adaptive mechanisms in determining genomic and phenotypical divergence. In the Canary Islands, an archipelago rich in endemics, the barn owl (Tyto alba) is thought t...

The combined actions of climatic variations and landscape barriers shape the history of natural populations. When organisms follow their shifting niches, obstacles in the landscape can lead to the splitting of populations, on which evolution will then act independently. When two such populations are reunited, secondary contact occurs in a broad ran...

Procellariiformes are one of the most threatened groups of birds of the world so knowledge of nesting habitat and factors affecting breeding rates are vital issues for their conservation. Although Cory's Shearwater Calonectris borealis is a well-studied seabird species on the whole, information on the relationship between its breeding parameters an...

The combined actions of climatic variations and landscape barriers shape the history of natural populations. When organisms follow their shifting niches, obstacles in the landscape can lead to the splitting of populations, on which evolution will then act independently. When two such populations are reunited, secondary contact occurs in a broad ran...

Due to their life-history traits, the petrels are particularly sensitive to predation by introduced species. Therefore, many populations have constricted their original breeding distribution range, currently only occupying predator-free sites. In this scenario, interspecific competition for nesting sites can be detrimental for the petrel’ conservat...

Le Pigeon des lauriers Columba junoniae exploitant le pollen et le nectar de l’Agave américain Agave americana. Les observations ont été réalisées durant l’été 2019 sur l’île de Tenerife, dans une zone de transition entre la végétation thermophile et la forêt de lauriers. En étant perchées sur les fleurs ou la tige de l’ombelle, les oiseaux picorai...

Until the middle of the 20th century, the Common Raven Corvus corax was an abundant bird in the Canary Islands. However, during recent decades, populations have decreased dramatically in the most densely populated islands, apparently because of changes in land use and other anthropic activities. In the current study, we estimated raven population s...

The Canary Islands are home to a large variety of endemic fauna. The Canary shrew (Crocidura canariensis) has a distribution restricted to Fuerteventura, Lanzarote and the islets of Lobos and Montaña Clara. One of the main threats to the insular fauna is the arrival of exotic species. The greater white-toothed shrew (Crocidura russula) is an easily...

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...

Asistencia técnica cofinanciada por la Dirección General de Protección de la Naturaleza del Gobierno de Canarias y el Fondo Europeo de Desarrollo Regional (FEDER, UE).

This paper presents the first geological and hydrogeological description of the Rambla de Castro (Los Realejos, Tenerife), as well as the carbon deposits and fossil plant imprints found in the area. Remains of leaves, fruits, seeds, branches and roots corresponding to several taxa are identified, including Phoenix sp., Persea indica (L.) C. K. Spre...

Este documento preliminar, elaborado para la Dirección General de Lucha contra el Cambio Climático y Medio Ambiente del Gobierno de Canarias, será puesto a exposición pública una vez finalice su periodo de evaluación.

Falcons were detected by admissions to La Tahonilla Wildlife Rehabilitation Center, Cabildo de Tenerife (1998-2017), lost falcons reports issued by falconers to the Wildlife Rehabilitation Center (2007-2017), and field observations by authors (1993-2017). Territory: yes = holding territory. Paired : Yes = Mated, No = Unmated

Peregrine Falcons (Falco peregrinus) on the Canary Islands are considered to be of the Barbary Falcon subspecies (F. p. pelegrinoides). Here we report on lost falconry birds present among the wild population of resident falcons, and provide rough approximations of their abundance for Tenerife, the largest island of the Canaries. We observed lost fa...

En este trabajo se presenta la primera descripción geológica e hidrogeológica de la Rambla de Castro (Los Realejos, Tenerife), así como de los depósitos carbonáticos y de las improntas vegetales fósiles halladas en la zona. Se identifican restos de hojas, frutos, semillas, ramas y raíces correspondientes a varios taxones, entre ellos Phoenix sp., P...

Asistencia técnica cofinanciada por la Dirección General de Protección de la Naturaleza del Gobierno de Canarias y el Fondo Europeo de Desarrollo Regional (FEDER, UE).

Asistencia técnica cofinanciada por la Dirección General de Protección de la Naturaleza del Gobierno de Canarias y el Fondo Europeo de Desarrollo Regional (UE).

Asistencia técnica cofinanciada por la Dirección General de Protección de la Naturaleza del Gobierno de Canarias y el Fondo Europeo de Desarrollo Regional (FEDER, UE).

The specific spatial distribution and habitat association -strongly influenced by environmental factors or competitive interactions- are major issues in ecology and conservation. We located and georeferenced nesting sites of five cliff-nesting raptors (Egyptian vulture Neophron percnopterus, common buzzard Buteo buteo, osprey Pandion haliaetus, com...

Asistencia técnica cofinanciada por la Dirección General de Protección de la Naturaleza del Gobierno de Canarias y el Fondo Europeo de Desarrollo Regional (FEDER, UE).

Technical report for Dirección General de Protección de la Naturaleza, Gobierno de Canarias

Asistencia técnica cofinanciada por la Dirección General de Protección de la Naturaleza del Gobierno de Canarias y el Fondo Europeo de Desarrollo Regional (FEDER, UE).

Asistencia técnica financiada por el Cabildo Insular de La Palma.

Both ecology and biology of the peregrine falcon are well known throughout its range. However, excepting the data from the Canary Islands, knowledge on the Barbary falcon natural history is scarce. We studied four Barbary falcon nesting sites in South-western Iran between 2011 and 2014. All eyries were located in cavities of cliffs whose average he...

Uncovering the genetic basis of phenotypic variation and the population history under which it established is key to understand the trajectories along which local adaptation evolves. Here, we investigated the genetic basis and evolutionary history of a clinal plumage color polymorphism in European barn owls (Tyto alba). Our results suggest that bar...

Asistencia técnica cofinanciada por el Ministerio de Agricultura, Alimentación y Medio Ambiente y el Fondo Europeo de Desarrollo Regional (FEDER, UE).

Capsule: Flowers of an invasive plant species are more visited by native birds than flowers of ornithophilous endemic plants. Aims: To describe the bird guild and its behaviour visiting the century plant Agave americana in an insular environment and to determine which factors are affecting visitation rates. Methods: We noted number and species of b...

The Teno range of mountains, located in the northwest Tenerife, Canary Islands, is still a refuge for the flora and fauna of the island. Until now, at least four native species of reptiles, 232 of birds (both breeding and migrant), and six mammals have been recorded for that site. For some of these animals, such as Canarian Spotted Lizard (Gallotia...

Between 2004 and 2007, we studied density, habitat features and breeding parameters of the osprey (Pandion haliaetus) population in Boa Vista Island (Cape Verde). A total of 79 nest structures were identified, 37 of which were occupied for at least 1 year during the study period. The osprey population ranged between 14 and 18 pairs, and the mean de...

We studied nesting habitat selection of the endangered non-migratory Osprey Pandion haliaetus population of the Canary Islands and evaluated the effect of human expansion in recent decades. Compared with randomly selected potential nest-sites, Osprey nests were more frequently found on taller, southwest-facing cliffs, char-acterized by lower human...

We studied the diet of the osprey Pandion haliaetus in the Canary Islands during 1997-2008 using prey remains under perches and nests, and direct observations. We collected data both in breeding territories and in non-breeding areas. We counted a minimum of 307 fish individuals as prey remains (both during breeding and non-breeding seasons), and id...

The taxonomic status of the Barbary Falcon has been controversial for many years, it being variously considered a subspecies of Peregrine Falcon (Falco peregrinus pelegrinoides) or treated as a full species (F. pelegrinoides). Although morphological and molecular studies are still scarce, they suggest that subspecific status is more appropriate. Ot...

We describe the adoption and alloparental care of fledglings by an Osprey pair during two consecutive breeding seasons (2008-09) in the small and semi-colonial cliff nesting population of Tenerife (Canary Islands). The intruding broods (two fledglings each year) switched nest a few days after fledging (≤ 10 days in 2008 and ≤ 6 in 2009). They used...

Roque de Garachico, a site of valuable natural heritage off the northwest coast of Tenerife. About 300 m off the coast at the town of Garachico, in northwest Tenerife, lays the Roque de Garachico, an impressive islet with a maximum height of 77 m and a surface area of 0.05 km². Because of both its proximity to the mainland and its isolation from it...

We studied the causes of raptor admissions to the only wildlife rehabilitation center on the largest island of the Canarian Archipelago (Tenerife) over ten years (1998–2007). A total of 2611 birds of prey, belonging to nine falconiform diurnal raptor and four strigiform species, were admitted. The Eurasian Kestrel (Falco tinnunculus) and the Long-e...

Capsule Taller and sheltered cliffs located in rugged areas are selected for breeding and only some life history traits fit the predictions of the so-called 'insular' syndrome. Aims To analyse the density and nesting habitat preferences of Buzzards on the island of Tenerife, and describe the life history traits of this population. Methods Density w...

During the 2009 breeding season (February-June) we studied the population size of Common Raven on four islands of the Canarian archipelago. A total of 44 pairs were censused: ten in Gran Canaria, 12 in Tenerife, 17 in La Palma and five in La Gomera. Most of these pairs have their territories in ravines, gullies and sea cliffs, coinciding with or cl...

We used data collected during 1995– 2007 at the only Wildlife Rehabilitation Center on Tenerife Island (Canary Islands) to quantify entanglement mortality of owls. At least 66 of 1,206 Long-eared (Asio otus) and 5 of 231 Barn (Tyto alba) owls admitted to the Wildlife Rehabilitation Center were entangled in burr bristlegrass (Setaria adhaerens). Twe...

A note on the diet of two insular subspecies of Barn Owl in two islands, Tyto alba schmitzi (Porto Santo, Madeiran archipelago) and Tyto alba detorta (Fogo, Cape Verde Islands).

We report 21 new polymorphic microsatellite markers in the European barn owl (Tyto alba). The polymorphism of the reported markers was evaluated in a population situated in western Switzerland and in another from Tenerife, Canary Islands. The number of alleles per locus varies between two and 31, and expected heterozygosity per population ranges fr...