Author: Kenneth J. HowellPublisher:
ISBN:
Category : Bats
Languages : en
Pages : 220
Book Description
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
Effects of Rainfall and Temperature on Weight Gain in the Big Brown Bat, Eptesicus Fuscus
Author: Robert DrummWildlife Review
Author: Bat Research News
Author: Proceedings of the Indiana Academy of Science
Author: Indiana Academy of SciencePublisher:
ISBN:
Category : Science
Languages : en
Pages : 146
Book Description
Seasonal Changes in Fat Content of the Big Brown Bat, Eptesicus Fuscus
Author: Neil S. WeberEffects 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
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
Ecological Consequences of Disease-related Bat Declines
Author: Amy Kristine WrayPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
The spread of infectious disease in wildlife represents an emerging threat to biodiversity. Particularly among predators, the effects of emerging infectious diseases not only include population declines and potential extirpation, but also can result in top-down effects on prey communities. In North America, several hibernating bat species face serious population declines due to the emergence of white-nose syndrome, a devastating disease caused by the fungal pathogen Pseudogymnoascus destructans. While arthropodivorous bats are often lauded for providing ecosystem services in the form of agricultural pest suppression, other regulatory effects on the arthropod food web as a whole have seldom been assessed. In light of the impending westward spread of white-nose syndrome and corresponding predicted bat population declines, this dissertation seeks to characterize the role of bats as top predators in the nocturnal arthropod food web and to assess the broader ecological consequences of disease-related bat population declines. Specifically, this research focuses on two common bat species, the little brown bat (Myotis lucifugus) and the big brown bat (Eptesicus fuscus), to explore the response of bats to changing prey abundance (Chapter 1), changes in bat foraging patterns over the past century (Chapter 2), top-down consequences of bat declines on arthropod communities (Chapter 3), and the possibility of the functional replacement of one bat species by another (Chapter 4). Overall, this dissertation demonstrates that the function of bats in the nocturnal arthropod food web is complex, and that declines among little brown bats in particular can have top-down effects which are unlikely to be ameliorated by other persisting bat species. As such, these results emphasize the necessity of promoting the conservation of bats and other aerial arthropodivores, while highlighting their importance as predators that influence their respective food webs.
Evaluating 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.