‘Many of these gradeland nastsra apparantly sought nesting grounds outeide 
of onr study area, As a Tasult, tha waterfowl population of southarmm Sasketche- 
wan during Mey and: sarly June of thie year was 40 percent lowsr than in ths 
corresponding period of 1946. | 
Despits this reduction in population, the ducks that normally neat in the 
Aspen Parklands, tegethar with thoss that moved inte thia ragion from ths drouth- 
Btrickean Short-Grese Prairiss, snjeyed a aucesssful hatch, Our production 
etudiss show that ons brood of young was produced per 1.8 potential nasting 
patra. Brood mortality was not sstious, arsraging ona duckling par brood, 
Class III breeds, representing young that ars approaching the flight atats, 
everagsd 6 ducklings per brood, 
oz 
