The use of knock-down tags to detect changes in occupancy among burrow-nesting seabirds : what is an adequate sample size? / by A.J. Gaston and B.T. Collins. : CW69-9/172E-PDF
"A major problem in taking a census of burrow-nesting seabirds is to decide what proportion of burrows is actually occupied. Where burrows are long, it may be necessary to dig one or more access tunnels to find the nest chamber and determine whether it is occupiect by a bird, egg or chick. The disturbance thus created may cause birds to desert and may alter the structure of the breeding habitat. In either case this affects the chances of future occupation. If the census is being conducted to detect population trends, such disturbances will reduce the validity of subsequent observations. Hence, there is a definite need for a method of determining burrow occupancy with minimum disturbance"--Introd.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.850201&sl=1
| Ministère/Organisme | Canada. Environment Canada. Canadian Wildlife Service. |
|---|---|
| Titre | The use of knock-down tags to detect changes in occupancy among burrow-nesting seabirds : what is an adequate sample size? / by A.J. Gaston and B.T. Collins. |
| Titre de la série | Progress notes ; no. 172 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Autres langues publiées | [Français] |
| Format | Électronique |
| Document électronique | |
| Note(s) | "January 1988." Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Utilisation de marqueurs de présence pour déterminer les variations du taux d'occupation de colonies d'oiseaux de mer nichant dans des terriers : calcul de la taille appropriée de l'échantillon. Includes bibliographical references. |
| Information sur la publication | [Ottawa] : Canadian Wildlife Service, 1988. |
| Auteur / Contributeur | Gaston, A. J. Collins, B. T., 1949- |
| Description | 4 p. : charts |
| Numéro de catalogue |
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| Descripteurs | Aquatic birds Population |