Ontario waterfowl production study. TR Gadawski
Material type:
TextPublication details: ON : 1980Online resources: Abstract: Pair and brood surveys were conducted on a biweekly basis, on 12 Ducks Unlimited projects in southern Ontario, from April 30 - August 17, 1979.Three general habitat types, small marshes, marshes and dead timber swamps were surveyed. Mallards (Anas platyrhynchos) were the most common species observed accounting for 40% of all pairs and 60% of all broods.Mallards, blue-wings (Anas discors) and wood ducks (Aix sponsa)comprised over 90% of all broods recorded. Peak period of nest initiation was from mid-April until the last week of May. Peak hatching period was May 13 - June 30. Mean pair densities were 2.0 +/- 0.3/ha and 7.2 +/- 2.1/km whereas mean brood densities were 2.5 +/- 0.9/ha and 8.1 +/- 2.7/km. There were no significant differences in pair densities among habitat types (p>0.05). Small marshes were significantly more productive of broods/km than the other two habitats (p<0.05) and they produced significantly more broods/ha than marshes (p<0.15). There were no significant diffe
| Item type | Current library | Collection | Call number | Status | Date due | Barcode |
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Electronic Report
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Electronic Library | Non-fiction | GAD (Browse shelf(Opens below)) | Available | 1001 |
CD# 2 file GAD002.PDF
Pair and brood surveys were conducted on a biweekly basis, on 12 Ducks Unlimited projects in southern Ontario, from April 30 - August 17, 1979.Three general habitat types, small marshes, marshes and dead timber swamps were surveyed. Mallards (Anas platyrhynchos) were the most common species observed accounting for 40% of all pairs and 60% of all broods.Mallards, blue-wings (Anas discors) and wood ducks (Aix sponsa)comprised over 90% of all broods recorded. Peak period of nest initiation was from mid-April until the last week of May. Peak hatching period was May 13 - June 30. Mean pair densities were 2.0 +/- 0.3/ha and 7.2 +/- 2.1/km whereas mean brood densities were 2.5 +/- 0.9/ha and 8.1 +/- 2.7/km. There were no significant differences in pair densities among habitat types (p>0.05). Small marshes were significantly more productive of broods/km than the other two habitats (p<0.05) and they produced significantly more broods/ha than marshes (p<0.15). There were no significant diffe