The large-scale impact of agriculture on ducks in the Prairie Provinces, 1956-81 / by H. Boyd. : CW69-9/149E-PDF
"Changes in duck numbers and production in the Prairie Provinces are compared with quinquennial agricultural census statistics and annual estimates of crop areas and production, to examine why the severe local damage known to be caused by wetland drainage and destruction of nesting cover affected regional duck populations relatively little until very recent years"--Abstract.
Lien permanent pour cette publication :
publications.gc.ca/pub?id=9.849969&sl=1
| Ministère/Organisme | Canada. Environment Canada. Canadian Wildlife Service. |
|---|---|
| Titre | The large-scale impact of agriculture on ducks in the Prairie Provinces, 1956-81 / by H. Boyd. |
| Titre de la série | Progress notes ; no. 149 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Autres langues publiées | [Français] |
| Format | Électronique |
| Document électronique | |
| Note(s) | "January 1985." Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also in French under title: Les grandes répercussions de l'agriculture sur les canards dans les Prairies, 1956 à 1981. Includes bibliographical references. |
| Information sur la publication | [Ottawa] : Canadian Wildlife Service, 1985. |
| Auteur / Contributeur | Boyd, H. |
| Description | 13 p. : maps |
| Numéro de catalogue |
|
| Descripteurs | Birds Habitats Agriculture Ducks |