Estimating densities of birds at sea and the proportion in flight from counts made on transects of indefinite width / A.J. Gaston, B.T. Collins, A.W. Diamond.: CW69-1/59E-PDF
"Counts of seabirds at sea are sometimes made without defining an outer transect width or measuring the distance to each sighting. These counts can be converted into indices of abundance by expressing them as birds per unit time or per distance travelled. If the relative motion of flying birds is taken into account, then the comparability of such indices can be improved. In addition, the relative density of birds in flight and on the water can be estimated. We present methods for doing this, based on knowledge of flight speeds and range of detectability"--Abstract.
Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.855901&sl=0
| Department/Agency | Canada. Environment Canada. Canadian Wildlife Service. |
|---|---|
| Title | Estimating densities of birds at sea and the proportion in flight from counts made on transects of indefinite width / A.J. Gaston, B.T. Collins, A.W. Diamond. |
| Series title | Occasional paper ; no. 59 |
| Publication type | Series - View Master Record |
| Language | [English] |
| Other language editions | [French] |
| Format | Electronic |
| Electronic document | |
| Note(s) | Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Estimation de la densité des oiseaux en mer et de la proportion des oiseaux en vol à partir des dénombrements effectués sur des transects de largeur indéterminée. Includes bibliographical references. |
| Publishing information | [Ottawa] : Canadian Wildlife Service, c1987. |
| Author / Contributor | Gaston, A. J. Collins, B. T., 1949- Diamond, A. W.,1944- |
| Description | 16 p. : ill. |
| Catalogue number |
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| Subject terms | Aquatic birds Population |