Elmberg, Johan and Sjöberg, Kjell and Nummi, Petri and Pöysä, Hannu (1997) Are northern breeding dabbling ducks resorce limited? MAGYAR VÍZIVAD KÖZLEMÉNYEK, 3. pp. 285-290. ISSN 1416-1389 (nyomtatott); 1419-6107 (elektronikus)
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Abstract
We describe patterns relating breeding waterfowl to habitat structure as we!! as to abundance and diversity of aquatic food invertebrates in 60 lakes in six regions in Sweden and Finland. Based on these patterns we studied the possible role of resource limitation and competition by a field experiment in which wing-clipped mallards were released to augment wild dabbling duck populations in 16 lakes in each of two years. Preliminary results of the experiments indicate no competition at the time of nest-buiiding (pair counts), but that mtra- as well as interspecific effects are possible later on in the breeding season (brood counts).
| Item Type: | Article |
|---|---|
| Subjects: | Q Science / természettudomány > QL Zoology / állattan S Agriculture / mezőgazdaság > SH Aquaculture. Fisheries. Angling / vizi növény-és állattartás, halászat, sporthorgászat |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 03 Sep 2026 13:25 |
| Last Modified: | 03 Sep 2026 13:25 |
| URI: | https://real.mtak.hu/id/eprint/245342 |
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