Interaction between Magnetic Stimuli and Annual Activity in Birds

2015 ◽  
pp. 171-182
Author(s):  
P. Semm ◽  
H. Brettschneider ◽  
K. D�lla ◽  
W. Wiltschko
Keyword(s):  
Annual Activity

Effect of climatic conditions on the annual activity and hibernation cycle of Richardson's ground squirrels and Columbian ground squirrels

1977 ◽  
Vol 55 (4) ◽  
pp. 693-703 ◽  
Author(s):  
Gail R. Michener
Keyword(s):  
Rocky Mountains ◽  
Climatic Conditions ◽  
Ground Squirrels ◽  
Active Season ◽  
Southern Alberta ◽  
Annual Activity ◽  
The Times ◽  
Columbian Ground Squirrels ◽  
Spring Emergence ◽  
Species Ecology

In 1975 and 1976 the times of spring emergence, breeding, and entry into hibernation were compared for Spermophilus richardsonii and S. columbianus in an area of sympatry in the foothills of the southern Alberta Rocky Mountains. Both species emerged earlier in 1976, which had a warmer than normal spring, than in 1975, which had a cooler than normal spring. In both years S. richardsonii emerged earlier than S. columbianus and remained active longer. Juvenile S. richardsonii entered hibernation when 17–20 weeks old whereas juvenile S. columbianus were 10–11 weeks old. Yearling S. richardsonii bred, whereas yearling S. columbianus did not. Breeding success affected the time of entry into hibernation but not the time of emergence from hibernation in the next spring. A possible relationship between the periodic arousals during hibernation and the emergence pattern of squirrels in spring is discussed. The significance of flexibility of spring emergence, length of the active season, and age at breeding to survival and species ecology is considered.

Field studies on the annual activity and the metabolic responses of a land snail population living in high altitude

2016 ◽  
Vol 191 ◽  
pp. 1-8 ◽  
Author(s):  
Alexandra Staikou ◽  
George Tachtatzis ◽  
Konstantinos Feidantsis ◽  
Basile Michaelidis
Keyword(s):  
High Altitude ◽  
Field Studies ◽  
Land Snail ◽  
Metabolic Responses ◽  
Snail Population ◽  
Annual Activity

scholarly journals Correlation between annual activity patterns of venomous snakes and rural people in the Niger Delta, southern Nigeria

2013 ◽  
Vol 19 (1) ◽  
pp. 2 ◽  
Author(s):  
Godfrey C Akani ◽  
Nwabueze Ebere ◽  
Daniel Franco ◽  
Edem A Eniang ◽  
Fabio Petrozzi ◽  
...  
Keyword(s):  
Niger Delta ◽  
Activity Patterns ◽  
Rural People ◽  
Venomous Snakes ◽  
Southern Nigeria ◽  
Annual Activity

Annual activity patterns of snakes from central Argentina (Córdoba province)

2008 ◽  
Vol 43 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Gerardo C. Leynaud ◽  
Gustavo J. Reati ◽  
Enrique H. Bucher
Keyword(s):  
Activity Patterns ◽  
Central Argentina ◽  
Annual Activity

Agassiz’s desert tortoise (Gopherus agassizii) activity areas are little changed after wind turbine induced fires in California

2018 ◽  
Vol 27 (12) ◽  
pp. 851 ◽  
Author(s):  
Jeffrey E. Lovich ◽  
Mickey Agha ◽  
Joshua R. Ennen ◽  
Terence R. Arundel ◽  
Meaghan Austin
Keyword(s):  
Wind Turbine ◽  
Sonoran Desert ◽  
Gopherus Agassizii ◽  
After Effects ◽  
Burned Areas ◽  
Energy Facility ◽  
Before And After ◽  
Annual Activity ◽  
Risk Of Exposure ◽  
Activity Areas

Wind turbine-induced fires at a wind energy facility in California, USA, provided an opportunity to study the before and after effects of fire on a population of protected Agassiz’s desert tortoises (Gopherus agassizii) in the Sonoran Desert, a species and ecosystem poorly adapted to fire. We compared annual activity areas (AAs) of tortoises in 2011 and 2013, before and after two 2012 fires, with those of tortoises in adjacent areas unaffected by the same fires. Tortoises in both AAs affected by fire or unaffected by fire occupied the same general AAs in 2013, after the fires, as they did in 2011, before the fires. Some tortoises had both their 2011 and 2013 AAs completely or almost completely within the areas burned by the 2012 fires, despite the proximity of unburned habitat. None of the tortoises with 2011 AAs subsequently unaffected by the 2012 fires shifted their AAs into burned habitat in 2013. For the fire-affected group of tortoises, the mean percentages of 2011 and 2013 AAs burned by the 2012 fires were not significantly different, showing fidelity to the burned areas. Tortoises in both groups generally occupied consistent AAs, even post fire, placing them at potential risk of exposure to unfavourable burned habitat.

Seasonal Activity Patterns of Two Species of Nyctophilus Bats Based on Mist-Net Captures.

1998 ◽  
Vol 20 (3) ◽  
pp. 349
Author(s):  
R.M. Brigham ◽  
F. Geiser
Keyword(s):  
Activity Patterns ◽  
Activity Cycle ◽  
Activity Levels ◽  
Seasonal Activity ◽  
Daily Torpor ◽  
Bat Activity ◽  
Annual Activity ◽  
A Site ◽  
Mist Net

We evaluated the annual activity cycle of Nytophilus gouldi and N. geoffroyi using 82 nights of mist-netting data from a site near Armidale in northern NSW. Our purpose was to assess whether these bats hibernated or used short bouts of daily torpor combined with foraging on at least some nights. During the cold months of the year (May - August) bat activity levels inferred from net captures was very low providing support for the hypothesis that these bats use daily torpor and at least sometimes actively forage as opposed to entering hibernation.

Activity Cycles in the Brown Trout (Salmo trutta L.): 2. Fish Artificially Fed

1964 ◽  
Vol 21 (1) ◽  
pp. 133-138 ◽  
Author(s):  
D. R. Swift
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Activity Patterns ◽  
Maximum Activity ◽  
Locomotory Activity ◽  
Prime Stimulus ◽  
Brown Trout Salmo Trutta ◽  
Annual Activity ◽  
Activity Cycles ◽  
Increased Activity

The diurnal and annual locomotory activity cycles of four brown trout confined in separate cages on the bed of Windermere and fed artificially from the lake surface are described. The annual activity curves were very similar, the fish being less active during the winter than in the summer with maximum activity occurring in June and again in August. The diurnal activity patterns were also very similar with a sharp rise in activity at dawn each day after an inactive night, the increased activity being maintained throughout the light period and falling rapidly at dusk.Two of the fish were fed daily at irregular times and two were fed automatically every 2 hr. The similarity of the activity patterns of these four fish and also the similarity to the patterns of unfed fish described in a previous paper suggests that light and not food is the prime stimulus to locomotory activity in brown trout.

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