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.
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| Department/Agency | Canada. Environment Canada. Canadian Wildlife Service. |
|---|---|
| Title | 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. |
| Series title | Progress notes ; no. 172 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Other language editions | [French] |
| Format | Electronic |
| Electronic document | |
| 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. |
| Publishing information | [Ottawa] : Canadian Wildlife Service, 1988. |
| Author / Contributor | Gaston, A. J. Collins, B. T., 1949- |
| Description | 4 p. : charts |
| Catalogue number |
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| Subject terms | Aquatic birds Population |
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