Changes in spatial memory mediated by experimental variation in food supply do not affect hippocampal anatomy in mountain chickadees (Poecile gambeli)

2002 ◽  
Vol 51 (2) ◽  
pp. 142-148 ◽  
Author(s):  
V. V. Pravosudov ◽  
P. Lavenex ◽  
N. S. Clayton
Keyword(s):  
Spatial Memory ◽  
Food Supply ◽  
Poecile Gambeli ◽  
Experimental Variation ◽  
Mountain Chickadees

scholarly journals Nocturnal Hypothermia in Seasonally Acclimatized Mountain Chickadees and Juniper Titmice

The Condor ◽  
2005 ◽  
Vol 107 (1) ◽  
pp. 151-155 ◽  
Author(s):  
Sheldon J. Cooper ◽  
James A. Gessaman
Keyword(s):  
Body Temperature ◽  
Body Mass ◽  
Energy Savings ◽  
Ambient Temperatures ◽  
Energy Expenditures ◽  
Poecile Gambeli ◽  
Daily Energy ◽  
Para Determinar ◽  
Mountain Chickadees

AbstractWe measured body temperature of Mountain Chickadees (Poecile gambeli) and Juniper Titmice (Baeolophus ridgwayi) at different times of day and under a range of ambient temperatures in order to determine the use of nocturnal hypothermia in seasonally acclimatized small passerines. Our findings show both species used nocturnal hypothermia year-round. Depth of hypothermia was inversely correlated to body mass in Juniper Titmice but not in Mountain Chickadees. In both species, depth of hypothermia did not vary seasonally but nocturnal body temperature was regulated 3–11°C lower than daytime values. Nocturnal energy savings range from 7%–50% in chickadees and from 10%–28% in titmice. These nocturnal energy savings translate into ecologically important reductions in daily energy expenditures for these two species.Hipotermia Nocturna en Individuos de Poecile gambeli y Baeolophus ridgwayi Aclimatados EstacionalmenteResumen. Medimos la temperatura corporal de Poecile gambeli y Baeolophus ridgwayi a diferentes horas del día y en un rango de temperaturas ambientales para determinar el uso de hipotermia nocturna en pequeñas aves paserinas aclimatadas estacionalmente. Nuestros resultados muestran que ambas especies presentaron hipotermia nocturna durante todo el año. La profundidad de la hipotermia estuvo inversamente correlacionada con la masa corporal en B. ridgwayi, pero no en P. gambeli. En ambas especies, la profundidad de la hipotermia no varió estacionalmente, pero la temperatura corporal nocturna estuvo regulada 3–11°C por debajo de los valores diurnos. El ahorro nocturno de energía varió entre 7%–50% en P. gambeli y entre 10%–28% en B. ridgwayi. Estos ahorros nocturnos de energía se tradujeron en reducciones ecológicamente importantes en los gastos diarios de energía para ambas especies.

scholarly journals Seasonal Energetics of Mountain Chickadees and Juniper Titmice

The Condor ◽  
2000 ◽  
Vol 102 (3) ◽  
pp. 635-644 ◽  
Author(s):  
Sheldon J. Cooper
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
Breeding Season ◽  
Basal Metabolic Rate ◽  
Energy Requirements ◽  
Daily Energy Expenditure ◽  
Poecile Gambeli ◽  
Daily Energy ◽  
Metabolic Data ◽  
Mountain Chickadees

Abstract I used behavioral, meteorological, and laboratory metabolism data to calculate daily energy expenditure (DEE) in seasonally acclimatized Mountain Chickadees (Poecile gambeli) and Juniper Titmice (Baeolophus griseus). Analyses of laboratory metabolic data revealed that foraging energy requirements were not significantly higher than alert perching energy requirements. Respective DEE of chickadees and titmice were 48.8 kJ day−1 and 48.3 kJ day−1 in summer and 66.3 kJ day−1 and 98.7 kJ day−1 in winter. DEE as a multiple of basal metabolic rate (BMR) was 2.31 in summer chickadees and 1.91 in summer titmice. DEE was 2.70 times BMR in winter chickadees and 3.43 times BMR in winter titmice. The marked increase in calculated DEE in winter birds compared to summer is in contrast to a pattern of increased DEE in the breeding season for several avian species. These data suggest that winter may be a period of even greater stringency for small birds than previously believed.

Long-Term Unpredictable Foraging Conditions and Physiological Stress Response in Mountain Chickadees (Poecile gambeli)

2001 ◽  
Vol 123 (3) ◽  
pp. 324-331 ◽  
Author(s):  
Vladimir V. Pravosudov ◽  
Alexander S. Kitaysky ◽  
John C. Wingfield ◽  
Nicola S. Clayton
Keyword(s):  
Stress Response ◽  
Physiological Stress ◽  
Poecile Gambeli ◽  
Physiological Stress Response ◽  
Mountain Chickadees

scholarly journals Ecologically relevant spatial memory use modulates hippocampal neurogenesis

2009 ◽  
Vol 277 (1684) ◽  
pp. 1071-1079 ◽  
Author(s):  
Lara D. LaDage ◽  
Timothy C. Roth ◽  
Rebecca A. Fox ◽  
Vladimir V. Pravosudov
Keyword(s):  
Spatial Memory ◽  
Task Difficulty ◽  
Hippocampal Neurogenesis ◽  
Adult Hippocampal Neurogenesis ◽  
Neural Architecture ◽  
Food Caching ◽  
In Captivity ◽  
Adult Hippocampus ◽  
Free Ranging ◽  
Mountain Chickadees

The adult hippocampus in birds and mammals undergoes neurogenesis and the resulting new neurons appear to integrate structurally and functionally into the existing neural architecture. However, the factors underlying the regulation of new neuron production is still under scrutiny. In recent years, the concept that spatial memory affects adult hippocampal neurogenesis has gained acceptance, although results attempting to causally link memory use to neurogenesis remain inconclusive, possibly owing to confounds of motor activity, task difficulty or training for the task. Here, we show that ecologically relevant, spatial memory-based experiences of food caching and retrieving directly affect hippocampal neurogenesis in mountain chickadees ( Poecile gambeli ). We found that restricting memory experiences in captivity caused significantly lower rates of neurogenesis, as determined by doublecortin expression, compared with captive individuals provided with such experiences. However, neurogenesis rates in both groups of captive birds were still greatly lower than those in free-ranging conspecifics. These findings show that ecologically relevant spatial memory experiences can directly modulate neurogenesis, separate from other confounds that may also independently affect neurogenesis.

scholarly journals Behavioural profile predicts dominance status in mountain chickadees, Poecile gambeli

2009 ◽  
Vol 77 (6) ◽  
pp. 1441-1448 ◽  
Author(s):  
Rebecca A. Fox ◽  
Lara D. Ladage ◽  
Timothy C. Roth ◽  
Vladimir V. Pravosudov
Keyword(s):  
Dominance Status ◽  
Poecile Gambeli ◽  
Behavioural Profile ◽  
Mountain Chickadees

scholarly journals Individual variation in spatial memory performance in wild mountain chickadees from different elevations

2016 ◽  
Vol 111 ◽  
pp. 225-234 ◽  
Author(s):  
R. Croston ◽  
D.Y. Kozlovsky ◽  
C.L. Branch ◽  
T.L. Parchman ◽  
E.S. Bridge ◽  
...  
Keyword(s):  
Spatial Memory ◽  
Individual Variation ◽  
Memory Performance ◽  
Mountain Chickadees

Problem-solving ability and response to novelty in mountain chickadees (Poecile gambeli) from different elevations

2015 ◽  
Vol 69 (4) ◽  
pp. 635-643 ◽  
Author(s):  
Dovid Y. Kozlovsky ◽  
Carrie L. Branch ◽  
Vladimir V. Pravosudov
Keyword(s):  
Problem Solving ◽  
Poecile Gambeli ◽  
Mountain Chickadees
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