| Autor: |
Kirby, J.S., Salmon, D.G., Atkinson-Willes, G.L., Cranswick, P.A. |
| Předmět: |
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| Zdroj: |
Journal of Applied Ecology. Aug95, Vol. 32 Issue 3, p536. 16p. |
| Abstrakt: |
Focuses on an alternative approach to indexing waterbird populations in Great Britain. Application of the system to monthly counts of waterfowl species from the winter seasons of 1966/67 to 1991/92; Mechanism of the system; Population trends of the waterbirds; Discussion on the reliability of the index numbers in tandem with trends of individual species. |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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