Morphology of thyroid C-cells and parathyroid glands in summer-active little brown bats,Myotis lucifugus lucifugus, with particular reference to pregnancy and lactation

1987 ◽  
Vol 178 (4) ◽  
pp. 421-427 ◽  
Author(s):  
Gary G. Kwiecinski ◽  
William A. Wimsatt ◽  
Lennart Krook
Keyword(s):  
Myotis Lucifugus ◽  
Parathyroid Glands ◽  
C Cells ◽  
Thyroid C Cells ◽  
Pregnancy And Lactation ◽  
Little Brown Bats

Water balance of free-ranging little brown bats (Myotis lucifugus) during pregnancy and lactation

1989 ◽  
Vol 67 (10) ◽  
pp. 2468-2472 ◽  
Author(s):  
Allen Kurta ◽  
Gary P. Bell ◽  
Kenneth A. Nagy ◽  
Thomas H. Kunz
Keyword(s):  
Tritiated Water ◽  
Water Flux ◽  
The Body ◽  
Myotis Lucifugus ◽  
Water Influx ◽  
Water Efflux ◽  
Pregnancy And Lactation ◽  
Daily Water ◽  
Free Ranging ◽  
Little Brown Bats

This study provides the first measurements of daily water flux in free-ranging bats during pregnancy and lactation. We used the wash-out rate of tritiated water from the body water pool to calculate daily water flux in 10 pregnant and 14 lactating little brown bats (Myotis lucifugus). Average water influx was 6.16 ± 0.47 (SE) mL/day during pregnancy and 6.91 ± 0.37 mL/day during lactation; average efflux was 6.27 ± 0.44 and 7.07 ± 0.36 mL/day during pregnancy and lactation, respectively. Using data from the literature, we partitioned daily flux into major components. Our calculations indicated that most (> 62%) water influx was preformed water in the insect diet. Drinking water represented 23–26% of daily influx. Although previous studies indicated that evaporative losses greatly exceeded urinary losses in laboratory-maintained M. lucifugus, urinary and evaporative losses were comparable in our free-ranging bats. Urinary losses represented 46% of water efflux during pregnancy and 35% during lactation. Over 80% of all water efflux occurs during the 8-h night.

Energetics of Pregnancy and Lactation in Freeranging Little Brown Bats (Myotis lucifugus)

1989 ◽  
Vol 62 (3) ◽  
pp. 804-818 ◽  
Author(s):  
Allen Kurta ◽  
Gary P. Bell ◽  
Kenneth A. Nagy ◽  
Thomas H. Kunz
Keyword(s):  
Myotis Lucifugus ◽  
Pregnancy And Lactation ◽  
Little Brown Bats

Immunoextracted calcitonin in milk and plasma from totally thyroidectomized women. Evidence of monomeric calcitonin in plasma during pregnancy and lactation

1986 ◽  
Vol 113 (4) ◽  
pp. 529-535 ◽  
Author(s):  
Elisabet Bucht ◽  
Margareta Telenius-Berg ◽  
Göran Lundell ◽  
Hans-Erik Sjöberg
Keyword(s):  
Molecular Weight ◽  
Mammary Gland ◽  
High Molecular Weight ◽  
Gel Chromatography ◽  
C Cells ◽  
Local Production ◽  
Thyroid C Cells ◽  
Pregnancy And Lactation ◽  
Series Of Experiments ◽  
High Concentrations

Abstract. The level of immunoreactive calcitonin in the first produced breast milk was in totally thyroidectomized (TX) women 713 ± 307 pg-eq/ml (mean ± sd, N = 7) and in control women 772 ± 329 pg-eq/ml (N = 33), i.e. about 45 times higher than in plasma (see below). On gel chromatography of immunoextracted milk from TX women, immunoreactive calcitonin appeared as high molecular weight forms in the same pattern as in milk from healthy women when the same antiserum (1) was used for immunoextraction and radioimmunoassay (RIA). In another series of experiments, a new antiserum (2) raised in rabbits was used for measurement of immunoreactive calcitonin after immunoextraction with 1. Plasma levels of immunoreactive calcitonin in the TX women during pregnancy were 16 ± 6 pg-eq/ml (N = 6) and during lactation 14 ± 7 pg-eq/ml (N = 5). Immunoreactive calcitonin was undetectable (< 8 pg/ml) in plasma from those TX women in whom lactation had stopped (N = 5). Immunoextraction and gel chromatography of plasma collected during pregnancy and lactation from the TX women showed that the immunoreactive calcitonin present eluted in the region of monomeric calcitonin with both antiserum 1 and 2. In conclusion, high concentrations of high molecular weight forms of immunoreactive calcitonin have been demonstrated in milk from TX patients, most probably devoid of any calcitonin-producing thyroid C-cells. This points to a local production site in the mammary gland. Relatively high levels of immunoreactive calcitonin in plasma during pregnancy and lactation in TX women also indicate extrathyroidal production.

The effect of chronic calcium treatment on thyroid C cells in ovariectomized rats

Life Sciences ◽  
2005 ◽  
Vol 77 (2) ◽  
pp. 121-129 ◽  
Author(s):  
B. Filipović ◽  
B. Šošić Jurjević ◽  
M. Manojlović Stojanoski ◽  
N. Nestorović ◽  
V. Milošević ◽  
...  
Keyword(s):  
Ovariectomized Rats ◽  
C Cells ◽  
Calcium Treatment ◽  
Thyroid C Cells

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.

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