Changes in Waterfowl Habitat with Flooding on the Ottawa River

1967 ◽  
Vol 31 (1) ◽  
pp. 197 ◽  
Author(s):  
William T. Munro
Keyword(s):  
Ottawa River ◽  
Waterfowl Habitat

Habitat selection by dabbling ducks in the Baie Noire marsh, southwestern Quebec

1979 ◽  
Vol 57 (11) ◽  
pp. 2230-2238 ◽  
Author(s):  
Réal Courcelles ◽  
Jean Bédard
Keyword(s):  
Analytical Techniques ◽  
Plant Distribution ◽  
Dabbling Ducks ◽  
Important Species ◽  
Ottawa River ◽  
Black Duck ◽  
Waterfowl Habitat ◽  
Management Plans ◽  
Correspondence Factor Analysis ◽  
Myriophyllum Exalbescens

We monitored the waterfowl distribution in a recently flooded 260-ha marsh along the Ottawa River during 1974 and 1975. The birds (the three most important species were the black duck. Anas rubripes; the mallard, A. platyrhynchos; and the blue-winged teal, A. discors) did not distribute randomly among the five major habitats recognized, but clearly preferred a habitat dominated physiognomically by broken cattail (Typha angustifolia) cover but best characterized ecologically by ivy-leaved duckweed (Lemna trisulca), whitish water-milfoil (Myriophyllum exalbescens), and common bladderwort (Utricularia vulgaris). On average, broods (0.3/ha) and adult birds (6.6/ha) were four times more abundant per hectare there than in the next best habitat. This pattern of use was stable throughout the summer and throughout the daylight period as well. Multivariate analysis (correspondence factor analysis) enabled us to extract those ecological variables that played a determinant role in controlling plant distribution throughout the marsh. The observational and analytical techniques developed in this work could be applied to the development of marsh management plans designed to promote the expansion of the preferred waterfowl habitat.

Factors Influencing Desorption of Mercury from Bed Sediments

1975 ◽  
Vol 12 (6) ◽  
pp. 1036-1040 ◽  
Author(s):  
Akira Kudo ◽  
D. C. Mortimer ◽  
J. Sanford Hart
Keyword(s):  
Environmental Conditions ◽  
Total Mercury ◽  
Exposure Period ◽  
Desorption Rate ◽  
Overlying Water ◽  
Bed Sediments ◽  
Ottawa River ◽  
Factors Influencing ◽  
River Bed

The desorption rate of mercury from bed sediments was determined by a 10 week experiment. The rates ranged from 0.1 ng/cm2/day to 1.0 ng/cm2/day for Ottawa River bed sediments, depending on the environmental conditions. The rates decreased with an increase of exposure period to the water, but increased with an increase in the depth of bed sediments. The amount of mercury desorbed from bed sediments to overlying water was highly dependent on the volume (depth) of bed sediments. Calculations based on the experiment showed the half-lives of total mercury associated with bed sediments from as short as 2.1 years to as long as 1.8 × 102 years, depending on the depth of the bed sediments.

scholarly journals Incorporating human dimensions objectives into waterfowl habitat planning and delivery

2017 ◽  
Vol 41 (3) ◽  
pp. 405-415 ◽  
Author(s):  
Patrick K. Devers ◽  
Anthony J. Roberts ◽  
Scott Knoche ◽  
Paul I. Padding ◽  
Robert Raftovich
Keyword(s):  
Human Dimensions ◽  
Waterfowl Habitat

The role of protected area wetlands in waterfowl habitat conservation: Implications for protected area network design

2014 ◽  
Vol 176 ◽  
pp. 144-152 ◽  
Author(s):  
William S. Beatty ◽  
Dylan C. Kesler ◽  
Elisabeth B. Webb ◽  
Andrew H. Raedeke ◽  
Luke W. Naylor ◽  
...  
Keyword(s):  
Network Design ◽  
Protected Area ◽  
Habitat Conservation ◽  
Area Network ◽  
Protected Area Network ◽  
Conservation Implications ◽  
Waterfowl Habitat

scholarly journals Lipolytic Bacteria in the Ottawa River

1973 ◽  
Vol 26 (5) ◽  
pp. 733-740 ◽  
Author(s):  
Christian R. Blaise ◽  
John B. Armstrong
Keyword(s):  
Ottawa River

scholarly journals A STUDY OF THE LIFE HISTORY OF TRICHOBILHARZIA CAMERONI SP. NOV. (FAMILY SCHISTOSOMATIDAE)

1953 ◽  
Vol 31 (4) ◽  
pp. 351-373 ◽  
Author(s):  
Liang-Yu Wu
Keyword(s):  
Life History ◽  
Life Cycle ◽  
Room Temperature ◽  
Migratory Birds ◽  
Local Infection ◽  
Domestic Ducks ◽  
Ottawa River ◽  
Daughter Sporocyst ◽  
Physa Gyrina ◽  
History Of

A cause of swimmer's itch in the lower Ottawa River is Trichobilharzia cameroni sp. nov. Its life cycle has been completed experimentally in laboratory-bred snails and in canaries and ducks, and the various stages are described. The eggs are spindle-shaped. The sporocysts are colorless and tubular. Mother sporocysts become mature in about a week. The younger daughter sporocyst is provided with spines on the anterior end and becomes mature in about three weeks. The development in the snail requires from 28 to 35 days. A few cercariae were found to live for up to 14 days at 50 °C., although their life at 16° to 18 °C. was about four days. Cercariae kept at room temperature for 60 to 72 hr. were found infective. The adults become mature in canaries and pass eggs in about 12 to 14 days. Physa gyrina is the species of snail naturally infected. It was found in one case giving off cercariae for five months after being kept in the laboratory. Domestic ducks were found to become infected until they were at least four months old, with the parasites developing to maturity in due course; no experiments were made with older ducks. Furthermore, miracidia were still recovered from the faeces four months after the duck had been experimentally infected, and it is suggested that migratory birds are the source of the local infection.

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