Bibliothèque Tour du Valat

Se connecter

Mot de passe oublié ?
Pas encore inscrit ?

La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Détail

Ajouter au panier

Ajouter au panier

Lien vers la notice

Titre :	Status of breeding Twite Carduelis flavirostris in the UK (2006)
Auteurs :	R. H. W. Langston, Auteur ; T. Smith, Auteur ; A. F. Brown, Auteur ; R. D. Gregory, Auteur
Type de document :	Article
Dans :	Bird Study (53 JUL 2006)
Article en page(s) :	55-63
Langues:	Anglais
Résumé :	Capsule The first comprehensive estimate of breeding Twite in the UK indicates that there were approximately 10 000 pairs in 1999. Aims To provide a baseline population estimate of breeding Twite in the UK. Methods In Scotland and England, three visits were made in May to July to a stratified random sample of 1-km squares, walking modified point transects, at 200-m intervals. Whilst recording was continuous, at 100-m intervals within suitable breeding habitat, observers made five-minute stops to scan and listen for Twite. Habitat cover was recorded to the nearest 10%. Supplementary records were collated from Wales and Northern Ireland. Several methods were used to produce population estimates, with boot-strapped confidence intervals. Results There were an estimated 10 000 pairs of breeding Twite in the UK in 1999, with the range lying between 6000 and 15 000 pairs. The majority, 9948 (95% confidence intervals 6293-14 586) pairs, was recorded in Scotland and England. Conclusions The population estimate provides a baseline for future surveys, although similar surveys are required in Wales and Northern Ireland (or all of Ireland) for completeness. A three-visit protocol is suggested for future surveys. There is accumulating evidence for the continued decline of Twite breeding range and numbers in the UK.

FAQ

Infos pratiques

Heures d'ouverture et contact

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...

Liens utiles

A-
A
A+