Testing the “Fasting While Foraging” Hypothesis: Effects of Recent Feeding on Plasma Metabolite Concentrations in Little Brown Bats (Myotis lucifugus)

2019 ◽  
Vol 92 (4) ◽  
pp. 373-380
Author(s):  
Dylan E. Baloun ◽  
Quinn M. R. Webber ◽  
Liam P. McGuire ◽  
Justin G. Boyles ◽  
Anuraag Shrivastav ◽  
...  
Keyword(s):  
Myotis Lucifugus ◽  
Metabolite Concentrations ◽  
Plasma Metabolite ◽  
Little Brown Bats

Effect of age on energy storage during prehibernation swarming in little brown bats (Myotis lucifugus)

2009 ◽  
Vol 87 (6) ◽  
pp. 515-519 ◽  
Author(s):  
L. P. McGuire ◽  
M. B. Fenton ◽  
C. G. Guglielmo
Keyword(s):  
Nutrient Intake ◽  
Age Groups ◽  
Myotis Lucifugus ◽  
Net Energy ◽  
Energy Expenditures ◽  
Fat Stores ◽  
The Difference ◽  
Plasma Metabolite ◽  
Net Energy Gain ◽  
Little Brown Bats

At temperate latitudes insectivorous bats face substantial nutritional demands prior to hibernation. As temperature decreases and availability of insect prey declines, bats must deposit nutrient stores for hibernation. The use of torpor allows bats to limit energy expenditures resulting in a net energy gain despite decreased energy intake. However, subadult bats have lower initial fat stores than adults and may have greater difficulty depositing sufficient nutrient stores to survive the winter. We used plasma metabolite analysis to determine the fueling performance of little brown bats ( Myotis lucifugus (LeConte, 1831)) during swarming to see if subadults compensated for the increased challenges by increased feeding throughout the swarming period. During the period of our study (August and September), adult bats gained mass, while subadults lost mass. There was, however, no difference in nutrient intake of the age groups as indicated by plasma metabolite concentrations. The number of bats using torpor while roosting in the hibernaculum by day increased exponentially coincident with the onset of mating and a decrease in nutrient intake. The results are consistent with wild bats using torpor to minimize energy expenditure and compensate for lower nutrient intake. The difference in mass change for adults and subadults despite the same nutrient intake indicates that subadults incur greater energetic costs.

Elevated mercury exposure and neurochemical alterations in little brown bats (Myotis lucifugus) from a site with historical mercury contamination

Ecotoxicology ◽  
2012 ◽  
Vol 21 (4) ◽  
pp. 1094-1101 ◽  
Author(s):  
Dong-Ha Nam ◽  
David Yates ◽  
Pedro Ardapple ◽  
David C. Evers ◽  
John Schmerfeld ◽  
...  
Keyword(s):  
Mercury Exposure ◽  
Myotis Lucifugus ◽  
Mercury Contamination ◽  
A Site ◽  
Little Brown Bats

scholarly journals Hepatic lipid signatures of little brown bats (Myotis lucifugus) and big brown bats (Eptesicus fuscus) at early stages of white-nose syndrome

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Evan L. Pannkuk ◽  
Nicole A. S.-Y. Dorville ◽  
Yvonne A. Dzal ◽  
Quinn E. Fletcher ◽  
Kaleigh J. O. Norquay ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Fatty Acid Distribution ◽  
Eptesicus Fuscus ◽  
Myotis Lucifugus ◽  
Pseudogymnoascus Destructans ◽  
Hepatic Lipid ◽  
Early Stages ◽  
White Nose Syndrome ◽  
Big Brown Bats ◽  
Little Brown Bats

AbstractWhite-nose syndrome (WNS) is an emergent wildlife fungal disease of cave-dwelling, hibernating bats that has led to unprecedented mortalities throughout North America. A primary factor in WNS-associated bat mortality includes increased arousals from torpor and premature fat depletion during winter months. Details of species and sex-specific changes in lipid metabolism during WNS are poorly understood and may play an important role in the pathophysiology of the disease. Given the likely role of fat metabolism in WNS and the fact that the liver plays a crucial role in fatty acid distribution and lipid storage, we assessed hepatic lipid signatures of little brown bats (Myotis lucifugus) and big brown bats (Eptesicus fuscus) at an early stage of infection with the etiological agent, Pseudogymnoascus destructans (Pd). Differences in lipid profiles were detected at the species and sex level in the sham-inoculated treatment, most strikingly in higher hepatic triacylglyceride (TG) levels in E. fuscus females compared to males. Interestingly, several dominant TGs (storage lipids) decreased dramatically after Pd infection in both female M. lucifugus and E. fuscus. Increases in hepatic glycerophospholipid (structural lipid) levels were only observed in M. lucifugus, including two phosphatidylcholines (PC [32:1], PC [42:6]) and one phosphatidylglycerol (PG [34:1]). These results suggest that even at early stages of WNS, changes in hepatic lipid mobilization may occur and be species and sex specific. As pre-hibernation lipid reserves may aid in bat persistence and survival during WNS, these early perturbations to lipid metabolism could have important implications for management responses that aid in pre-hibernation fat storage.

Torpor patterns in food-deprived Myotis lucifugus (Chiroptera: Vespertilionidae) under simulated roost conditions

1991 ◽  
Vol 69 (1) ◽  
pp. 255-257 ◽  
Author(s):  
Allen Kurta
Keyword(s):  
Metabolic Rate ◽  
Myotis Lucifugus ◽  
Metabolic Rates ◽  
Laboratory Studies ◽  
Insectivorous Bats ◽  
Wet Weather ◽  
Single Night ◽  
Little Brown Bats

Temperate insectivorous bats are commonly prevented from foraging by cold or wet weather. This study examines the effect of missing a single night of foraging on the energetics of pregnant and lactating little brown bats (Myotis lucifugus) under simulated roost conditions. After not foraging, the day-roosting metabolic rate of pregnant M. lucifugus was reduced by 61% and that of lactating bats by 46%. Although previous laboratory studies predicted that food-deprived bats should remain in torpor throughout the day-roosting period, M. lucifugus consistently aroused from torpor between 11:00 and 15:00 and maintained elevated metabolic rates for the rest of the day.

Effect of Peripheral Serotonin on Plasma Metabolite Concentrations and Glucose Uptake in Several Tissues

2011 ◽  
pp. P1-492-P1-492
Author(s):  
Hitoshi Watanabe ◽  
Kazuki Saito ◽  
Ryo Saito ◽  
Tatsuya Nakano ◽  
Shyuichi Ohwada ◽  
...  
Keyword(s):  
Glucose Uptake ◽  
Metabolite Concentrations ◽  
Plasma Metabolite

scholarly journals Long-distance movements of little brown bats (Myotis lucifugus)

2013 ◽  
Vol 94 (2) ◽  
pp. 506-515 ◽  
Author(s):  
Kaleigh J. O. Norquay ◽  
Felix Martinez-Nuñez ◽  
Jack E. Dubois ◽  
Kim M. Monson ◽  
Craig K. R. Willis
Keyword(s):  
Myotis Lucifugus ◽  
Long Distance ◽  
Little Brown Bats
Sign in / Sign up

Export Citation Format

Share Document