Seasonal and Diurnal Variation of Singing Activity: Their Possible Relationship with Intra- and Inter-Sexual Function in the Savannah Sparrow, Passerculus sandwichensis

2019 ◽  
Vol 36 (3) ◽  
pp. 173
Keyword(s):  
Sexual Function ◽  
Diurnal Variation ◽  
Passerculus Sandwichensis ◽  
Savannah Sparrow ◽  
Seasonal And Diurnal Variation ◽  
Singing Activity

scholarly journals Heart rate sensor validation and seasonal and diurnal variation of body temperature and heart rate in domestic sheep

2019 ◽  
Vol 8 ◽  
pp. 100075 ◽  
Author(s):  
Boris Fuchs ◽  
Kristin Marie Sørheim ◽  
Matteo Chincarini ◽  
Emma Brunberg ◽  
Solveig Marie Stubsjøen ◽  
...  
Keyword(s):  
Heart Rate ◽  
Body Temperature ◽  
Diurnal Variation ◽  
Domestic Sheep ◽  
Sensor Validation ◽  
Seasonal And Diurnal Variation ◽  
Rate Sensor

Effects of agriculture upon populations of native passerine birds of an Alberta fescue grassland

1973 ◽  
Vol 51 (7) ◽  
pp. 697-713 ◽  
Author(s):  
R. A. Owens ◽  
M. T. Myres
Keyword(s):  
Passerine Birds ◽  
Passerculus Sandwichensis ◽  
Disturbed Areas ◽  
Native Grassland ◽  
Savannah Sparrow ◽  
Anthus Spragueii ◽  
Agricultural Use ◽  
Horned Lark ◽  
Sprague's Pipit ◽  
Avian Populations

The effects of several forms of agricultural use of native fescue (Festuca scabrella) grasslands upon populations of native passerine birds were studied in the Hand Hills of southern Alberta in 1970.Censuses of avian populations were carried out on twelve 40-acre (16.2 ha) study plots as well as on two 10-mi (16.1 km) long roadside routes. The vegetation on the study plots and along the roadside routes was described.Native fescue grasslands, undisturbed for 3 years, supported a passerine community consisting of Baird's sparrow (Ammodramus bairdii), Sprague's pipit (Anthus spragueii), savannah sparrow (Passerculus sandwichensis), clay-colored sparrow (Spizella pallida), and western meadowlark (Sturnella neglecta). Incomplete disturbance of fescue grasslands, by mowing for hay or grazing by cattle, reduced or eliminated Baird's sparrow and Sprague's pipit but permitted the ingress of horned lark (Eremophila alpestris) and chestnut-collared longspur (Calcarius ornatus). Total elimination of the native grassland, by ploughing and cultivation for cereal crops, eliminated all passerine species except the horned lark. Peripheral disturbed areas resulting from cultivation, such as held boundaries and roadside ditches, may have benefited several species that tend to occur in ecotonal habitats: savannah sparrow, clay-colored sparrow, and vesper sparrow (Pooecetes gramineus).

Seasonal and diurnal variation of downstream fish movement at four small‐scale hydropower plants

2019 ◽  
Vol 29 (1) ◽  
pp. 74-88 ◽  
Author(s):  
Josef Knott ◽  
Melanie Mueller ◽  
Joachim Pander ◽  
Juergen Geist
Keyword(s):  
Diurnal Variation ◽  
Small Scale ◽  
Fish Movement ◽  
Hydropower Plants ◽  
Seasonal And Diurnal Variation

Nestling foods of the savannah sparrow

1984 ◽  
Vol 62 (1) ◽  
pp. 23-27 ◽  
Author(s):  
Marie Meunier ◽  
Jean Bédard
Keyword(s):  
Breeding Season ◽  
Temporal Changes ◽  
Prey Abundance ◽  
Large Prey ◽  
Passerculus Sandwichensis ◽  
Main Prey ◽  
Savannah Sparrow ◽  
Close Relationship ◽  
Males And Females ◽  
Prey Items

The diet of savannah sparrow (Passerculus sandwichensis) nestlings was monitored at Îsle Verte, Québec, during the 1980 breeding season. Adults carried exclusively arthropods to the nest. The main prey types found were Lepidoptera and Hymenoptera larvae, larval and adult Diptera and Homoptera. The proportion of different prey types in the diet varied during the season but there was no close relationship between temporal changes in the indices of prey abundance in the habitat and the type of prey chosen by the adult birds. Both the type and size of prey brought to the nest changed with the age and number of nestlings (aged 4–10 days). The proportion of Homoptera in the diet decreased sharply with age while that of Lepidoptera and Diptera increased. Adults feeding broods of four brought a larger proportion of large prey items (Lepidoptera and Hymenoptera larvae) than those feeding broods of a lesser size; to these they brought a larger proportion of smaller items such as Diptera and adult Lepidoptera. Males and females brought the same major prey types to the nest but not in the same proportions.

Seasonal and diurnal variation in concentrations of gaseous and particulate phase endosulfan

2012 ◽  
Vol 61 ◽  
pp. 620-626 ◽  
Author(s):  
Qingbo Li ◽  
Xianyu Wang ◽  
Jing Song ◽  
Hongqi Sui ◽  
Lei Huang ◽  
...  
Keyword(s):  
Diurnal Variation ◽  
Particulate Phase ◽  
Seasonal And Diurnal Variation
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