Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"bioacoustics"”.
-
Bioacoustics and reproductive ecology of the damselfish Dascyllus albisella
While many fishes are known to produce sounds during courtship and aggression, the information contained in the sounds and their role in reproduction is not well understood. This thesis is an intensive investigation of the sounds produced by the damselfish Dascyllus albisella, the effect of the …
-
Bioacoustics and reproductive ecology of the damselfish Dascyllus albisella
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1995.
-
The Importance of Bioacoustics for Dolphin Welfare: Soundscape Characterization with Implications for Management
… sound producing activities. The central role of bioacoustics for dolphins means that PAM is a basic life support requirement along with water and food testing. Periodic noise is of highest concern, and PAM is needed to inform mitigation of noise from periodic sources. Priority actions are more …
-
Addressing Engineering Challenges In Bioacoustic Recording
Bioacoustics is a very challenging field due to the necessity of putting fragile, powerhungry pieces of instrumentation out in isolated, hostile environments for long periods of time. Making these instruments as durable as possible, while also considering weight, power consumption, size, and …
-
Soundscapes of Sumatra: an analysis of the susceptibility of vocal fauna to ecological edge effects within a historically disturbed lowland forest, Sumatra, Indonesia.
… composition within an ecosystem using its bioacoustics. This study modelled the variations in the edge effects of forests structure, microclimate, anthropogenic disturbance, and biodiversity within a historically logged lowland forest in Sumatra. As well as the susceptibility of the …
-
Towards multimodal monitoring of large African carnivores
… lion and leopard vocalisations and outline how bioacoustics combined with camera trapping could result in improved monitoring for lions and leopards.<p></p>
-
Acoustic classification of zooplankton
Work on the forward problem in zooplankton bioacoustics has resulted in the identification of three categories of acoustic scatterers: elastic-shelled (e.g. pteropods), fluid-like (e.g. euphausiids), and gas-bearing (e.g. siphonophores). The relationship between backscattered energy and animal …
-
Fitness for the Ark : are zoo bred amphibians ready to go back to the wild?
… we used behavioural observations, microbiology, bioacoustics, playback experiments, and spectroscopy analysis of captive and wild frogs to understand the consequences of being born and reared in a captive environment. Specifically, we examined aspects of our species biology that affect an …
-
The Sleepless Forest Observers : Ecologists are using remote observation to advance their understanding of environments. Are they losing something in the process?
… traps” doubled, and the number with the keyword “bioacoustics” increased by 50%. There are good reasons for this shift. Remote sensing can help researchers learn about ecosystems. Because sensors don’t always need someone physically present, researchers can use them to collect data at larger and …
-
Evaluating the Use of Autonomous Recording Units to Monitor Yellow Rails, Nelson's Sparrows, and Le Conte's Sparrows
… by analyzing recorded vocalizations using bioacoustics software. I deployed 22 ARUs at 54 sites in northern Minnesota and eastern North Dakota, and conducted concurrent traditional broadcast surveys during May-June, 2010 and 2011. I compared ARU-based detections to the standard marsh bird …
-
Listening to nature: Acoustic analysis for monitoring wildlife management and protected areas
… Matlab HTK, a hidden Markov models interface for bioacoustics analyses, for illustrating AFSR technique by comparing two approaches, 1) a multispecies recognizer where all species are identified simultaneously, and 2) an assemblage of focal species recognizers (AFSR), where several recognizers …
-
Investigating the ecological role of sound on coral reefs
Acoustic environments (soundscapes) are increasingly being recognized for their ecological relevance to marine life. Larval stages of many species use acoustic cues to optimize their choice of settlement habitat. Coral reefs feature particularly complex natural soundscapes, yet little is known …
-
Automatic baleen whale detection and 2D localization using a network of unsynchonized passive acoustic sensors
Underwater acoustics is a powerful tool for learning about the ocean’s soniferous marine life. However, most modern acoustic sensing systems consist of expensive arrays of timesynchronized recorders which require a crewed research vessel and significant expertise to deploy, operate, and recover. …
-
The role of sound and sociability in the success of invasive lionfish (Pterois spp.)
Animals use sensory information to guide a range of behaviours such as foraging, navigating, avoiding predators, and interacting with conspecifics. When invasive species are introduced into novel environments, however, they may face “information landscapes” different to those experienced in their …
-
Investigation of pre- and post-zygotic reproductive barriers between two host-plant complex races of the parasitic wasp Cotesia congregata (Say) [Hymenoptera: Braconidae]
Investigations of host-associated differentiation of parasitoids have largely focused on the degree of molecular genetic differentiation, but a true test of species status must examine the mating patterns of differentiated populations to determine if they can interbreed in the wild and produce …
-
Wissensbasierte Modellierung von Audio-Signal-Klassifikatoren : zur Bioakustik von Tursiops truncatus. - 2., überarb. Aufl.
Die vorliegende Arbeit befasst sich mit der wissensbasierten Modellierung von Audio-Signal-Klassifikatoren (ASK) für die Bioakustik. Sie behandelt ein interdisziplinäres Problem, das viele Facetten umfasst. Zu diesen gehören artspezifische bioakustische Fragen, mathematisch-algorithmische Details …
-
Drumming Trees and Stone Percussion: An Evolution of Rhythm
In the tapestry of human evolution, rhythm emerges as a luminous thread that weaves through the fabric of existence. In the context of evolutionary dynamics, rhythm's influence emerges as a pivotal force. Beyond its functional utility, rhythmic patterns become conduits for comprehension and …
-
Monitoring Squirrels from the Sky: Applications of Uncrewed Aerial Systems-Based Bioacoustic and Vegetation Monitoring Regimes for Mohave Ground Squirrel
This research aimed to better understand the areas occupied by the Mohave ground squirrel (Xerospermophilus mohavensis) through the application of uncrewed aerial systems-based (henceforward UAS or drones) bioacoustic monitoring. The Mohave ground squirrel (MGS) is a threatened species under the …
-
Use of Song Types by Male Carolina Chickadees (Poecile carolinensis)
<p>North American chickadees (Poecile spp.) are a closely related group in which vocalizations are very similar. The combinatorial 'chickadee' call, given by all members of the genus, has been well studied, especially in Black-capped chickadees. Chickadee song has received much less study, …
Page 1 of 2