Author: Joseph Andrew TeraminoPublisher:
ISBN:
Category : Bats
Languages : en
Pages : 126
Book Description
Effects of Fat Content and Foraging Success on Metabolism in the Big Brown Bat (Eptesicus Fuscus)
Author: Joseph Andrew TeraminoPublisher:
ISBN:
Category : Bats
Languages : en
Pages : 126
Book Description
Seasonal Changes in Fat Content of the Big Brown Bat, Eptesicus Fuscus
Author: Neil S. WeberBats of Michigan
Author: Allen KurtaIntraspecific Variation in Metabolism and Thermoregulation in Eptesicus Fuscus (the Big Brown Bat)
Author: Christopher Seth RichardsonPublisher:
ISBN:
Category :
Languages : en
Pages : 530
Book Description
Abstract: I examined regulatory nonshivering thermogenesis (NST), basal metabolic rate (BMR), and plasma levels of thyroid hormone (T3), leptin and cortisol in the big brown bat, Eptesicus fuscus, at seven maternity colonies in Massachusetts (MA) (northern population) and two maternity colonies in Alabama (AL)/Georgia (GA) (southern population) in 1997 and 1998 to test the hypothesis that these traits vary geographically. After accounting for effects of body mass and stage of pregnancy and within-population variation, I found that bats from the northern population did not differ significantly from those in the southern population for NST, BMR, T3, leptin and cortisol. For all traits, except for cortisol, the test for differences among all colonies from both populations was significant. For NST, colonies did not differ significantly within MA, whereas bats from the AL colony tended to have greater NST than all other colonies of bats examined. For BMR, colonies differed significantly within MA, whereas bats from the AL colony had significantly greater BMR than those from the GA colony. Moreover, the AL colony tended to have greater BMR than all other colonies of bats examined. For T3, leptin and cortisol, colonies did not differ significantly within MA, whereas bats from the AL colony had significantly greater T3, lower leptin and lower cortisol than those in the GA colony. Additionally, bats from the AL colony tended to have greater T3, lower leptin and lower cortisol than all other colonies. Thus, for NST, BMR, T3, leptin and cortisol, most or all of the variation among colonies cannot be explained by differences between populations (i.e., macro-geographic variation). Clearly, the absence of any predicted population differences along a clinal (adaptive) direction rules out evolutionary adaptations of bats to different thermal environments as the primary reason for differences among colonies for NST, BMR and their hormone correlates. However, the clear presence of among-colony, and within-population variation (i.e., micro-geographic) for these traits, suggests that environmental factors (acting recently) may play an important role in shaping the observed intra-specific variation in NST and BMR. Additionally, inter-individual variation and seasonal and sex differences were found for NST, BMR and the hormones.
Michigan Birds and Natural History
Author: The Effects of Urbanization on Habitat Use by the Big Brown Bat, Eptesicus Fuscus [microform]
![The Effects of Urbanization on Habitat Use by the Big Brown Bat, Eptesicus Fuscus [microform] PDF](https://books.google.com/books/content/images/frontcover/pcL6NAEACAAJ?fife=w80-h100)
Author: Judy (Judith Frances) GeggiePublisher: National Library of Canada
ISBN: 9780315121416
Category :
Languages : en
Pages : 178
Book Description
Effects of Rainfall and Temperature on Weight Gain in the Big Brown Bat, Eptesicus Fuscus
Author: Robert DrummEvaluating Energy-based Trait Shifts and Population Level Impacts of Big Brown Bats (Eptesicus Fuscus) with Long-term Exposure to Pseudogymnoascus Destructans
Author: Molly C. SimonisPublisher:
ISBN:
Category : Biology
Languages : en
Pages : 0
Book Description
Disturbances in environment can lead to a wide range of host physiological responses. These responses can either allow hosts to adjust to new conditions in their environment or can reduce their survival, and can subsequently cause host traits to shift. Small mammals are particularly vulnerable to stochastic disturbances, like a pathogen introduction, because of their high energy demands. Studies examining host responses to pathogens often focus on species highly susceptible to infection that typically have high mortality rates, leading to a gap in understanding the responses of less susceptible species. My dissertation evaluates the energy balance of Eptesicus fuscus (big brown bats), a species considered less susceptible to the introduced fungal pathogen Pseudogymnoascus destructans (Pd) which causes white-nose syndrome in North American hibernating bats. I quantified changes in body mass, energy expenditures and the abundance of E. fuscus over long-term Pd exposure time. Using 30 years of data for 24,129 individual E. fuscus captures across the eastern US, I found E. fuscus body mass decreased with increasing latitude once Pd was established on the landscape (5+ years). When measuring whole-animal energy expenditures of 19 E. fuscus in lab settings using open-flow respirometry, I found that E. fuscus with long-term exposure to Pd have increases or no change to torpid metabolic rates across a wide range of ambient temperatures. Finally, the overall abundance of E. fuscus increased with Pd exposure, and lactating and post-lactating bats increased abundance with increasing latitude in the eastern US. Taken together, these results suggest that E. fuscus may have a combination of pathogen and intraspecific competitive pressures impacting their populations, particularly in northern latitudes. This dissertation highlights how introduced pathogens can cause spatially variable responses in less susceptible hosts over time, and other ecological pressures may contribute to those responses. Future efforts for understanding the degree of persistence of less susceptible wildlife host populations are critical for predicting how and why their populations change following emerging infectious disease outbreaks and epidemics.
A Two Year Study on the Effects of Monthly Rainfall on Weight Gain in the Big Brown Bat (Eptesicus Fuscus)
Author: Kenneth J. HowellPublisher:
ISBN:
Category : Bats
Languages : en
Pages : 220
Book Description
Ecology of Bats
Author: T.H. KunzPublisher: Springer Science & Business Media
ISBN: 1461334217
Category : Science
Languages : en
Pages : 434
Book Description
Among living vertebrates bats and birds are unique in their ability to fly, and it is this common feature that sets them apart ecologically from other groups. Bats are in some ways the noctumal equivalents of birds, having evolved and radiated into a diversity of forms to fill many of the same niches. The evolution of flight and echolocation in bats was undoubtedly a prime mover in the diversification of feeding and roosting habits, reproductive strategies, and social behaviors. Bats have successfully colonized almost every continential region on earth (except Antarctica), as weIl as many oceanic islands and archipelagos. They comprise the second largest order of mammals (next to rodents) in number of species and probably exceed all other such groups in overall abundance. Bats exhibit a dietary diversity (including insects, fruits, leaves, flowers, nectar and pollen, fish. other vertebrates, and blood) unparalleled among other living mammals. Their reproductive pattems range from seasonal monestry to polyestry, and mating systems inelude promiscuity, monogamy, and polygyny. The vast majority of what we know about the ecology of bats is derived from studies of only a few of the approximately 850 species, yet in the past two decades studies on bats have escalated to a level where many important empirical pattems and processes have been identified. This knowledge has strengthened our understanding of ecological relationships and encouraged hypothesis testing rather than perpetuated a catalog of miscellaneous observations.