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Soniferous reef animals produce sound through intentional behaviors like communication and as byproducts of activities like feeding and defending. Sounds from individuals collectively create habitat-specific and temporally variable biological soundscapes. As sounds propagate away from their sources, they may influence larval fishes that use acoustic cues during settlement. Therefore, animal behavior creates spatiotemporally-variable soundscapes, which in turn influence the behavior of fishes during a critical life history transition. These different scales of marine bioacoustics were investigated. The soundscapes across a range of reef quality were recorded for six weeks in an anthropogenically-degraded region of Caribbean Panama. The same contributors to the soundscapes were observed across sites, with taxa-specific variation in spatiotemporal patterns of acoustic behavior. The observed rate of these potential cues was predicted by an individual-based model to improve larval settlement, suggesting resiliency of some components of these acoustic cuescapes. The toadfish Ampicthyses cryptocentrus was a dominant contributor to the soundscapes and showed site-specific temporal variation. Analyses of recordings of ten focal males and males in neighboring burrows demonstrated that males were responsive to multiple neighbors, not just the perceived loudest competitor, and a null model supported that grunts overlapping neighbors’ calls were used as acoustic competition. These results suggest the contribution of toadfish to the soundscape is dependent on both abundance and spatial distribution. Calibrated propagation modelling was used to predict the acoustic fields created by reef-based sounds. It was found that spatial heterogeneity in cue strength increases with frequency and changes with source location, with implications for cue detection. Detection of reef-based cues is enhanced when the otoliths receive energy from the bladder’s response to pressure fluctuations. Changes in bladder size and otolith-bladder distances are likely to create ontogenetic changes in pressure sensitivity, which was tested with a combination of micro-computed tomography and finite-element modelling using larval Sciaenops ocellatus. Otolith-bladder distances increased with fish size, reducing predicted pressure sensitivity. Bladder volume also increased with growth, compensating for increasing distances by partially recovering predicted pressure sensitivity. Combined, these results highlight the system’s complexity: social behavior, spatiotemporal variation, and ontogenetic patterns dynamically influence how soundscapes influence larval behavior
This volume is a compilation of the papers presented at a meeting that took place in April 1980 at the Mote Marine Laboratory, Sarasota, Florida. The meeting and this volume are outgrowths of two earlier international meetings on marine bio-acoustics that occurred in 1963 and 1966 (Tavolga 1964, 1967). The first meeting took place at the Lerner Marine Laboratory of the American Museum of Natural History, while the second meeting was at the American Museum itself, and was under the sponsorship of the Department of Animal Behavior. It is apparent that these two volumes have had immense impact on the current study of marine bio-acoustics, and particularly on fish audition. In a preliminary conference in Sarasota in 1979 we decided that it was time for another such meeting, to bring together as many as possible of the investigators interested in fish acoustics in order to assess the current state of our knowledge and predict directions for research for the next several years. Such a meeting appeared par ticularly timely, since over the past four or five years there have been many new studies that have provided new empirical and theoretical work on basic mechanisms of fish audition. Furthermore, it became evident, as we made up preliminary lists of possible participants, that few of the currently active workers were in the field back in 1966. In fact, of the current participants, only Drs.
This volume examines fish sounds that have a proven signal function, as well as sounds assumed to have evolved for communication purposes. It provides an overview of the mechanisms, evolution and neurobiology behind sound production in fishes, and discusses the role of fish sounds in behavior with a special focus on choice of mate, sex-specific and age-specific signaling. Furthermore, it highlights the ontogenetic development of sound communication and ecoacoustical conditions in fish habitats and the influence of hormones on vocal production and sound detection. Sound Communication in Fishes offers a must-have compendium for lecturers, researchers and students working in the fields of animal communication, fish biology, neurobiology and animal behavior.
Over the past several years, many investigators interested in the effects of man-made sounds on animals have come to realize that there is much to gain from studying the broader literature on hearing sound and the effects of sound as well as data from the effects on humans. It has also become clear that knowledge of the effects of sound on one group of animals (e.g., birds or frogs) can guide studies on other groups (e.g., marine mammals or fishes) and that a review of all such studies together would be very useful to get a better understanding of the general principles and underlying cochlear and cognitive mechanisms that explain damage, disturbance, and deterrence across taxa. The purpose of this volume, then, is to provide a comprehensive review of the effects of man-made sounds on animals, with the goal of fulfilling two major needs. First, it was thought to be important to bring together data on sound and bioacoustics that have implications across all taxa (including humans) so that such information is generally available to the community of scholars interested in the effects of sound. This is done in Chaps. 2-5. Second, in Chaps. 6-10, the volume brings together what is known about the effects of sound on diverse vertebrate taxa so that investigators with interests in specific groups can learn from the data and experimental approaches from other species. Put another way, having an overview of the similarities and discrepancies among various animal groups and insight into the “how and why” will benefit the overall conceptual understanding, applications in society, and all future research.
For the 119 species of marine mammals, as well as for some other aquatic animals, sound is the primary means of learning about the environment and of communicating, navigating, and foraging. The possibility that human-generated noise could harm marine mammals or significantly interfere with their normal activities is an issue of increasing concern. Noise and its potential impacts have been regulated since the passage of the Marine Mammal Protection Act of 1972. Public awareness of the issue escalated in 1990s when researchers began using high-intensity sound to measure ocean climate changes. More recently, the stranding of beaked whales in proximity to Navy sonar use has again put the issue in the spotlight. Ocean Noise and Marine Mammals reviews sources of noise in the ocean environment, what is known of the responses of marine mammals to acoustic disturbance, and what models exist for describing ocean noise and marine mammal responses. Recommendations are made for future data gathering efforts, studies of marine mammal behavior and physiology, and modeling efforts necessary to determine what the long- and short-term impacts of ocean noise on marine mammals.
Oceans and Human Health: Opportunities and Impacts, Second Edition explores the inextricably interconnected and complex relationship between oceans and humans. Through the lens of the expanding oceans and human health meta-discipline, this work examines the many invaluable ecosystem services offered by oceans as well as the global anthropogenic impacts, and explores the associated risks and benefits to human health. Written and edited by an interdisciplinary team of experts, the book features international perspectives on the resources available to address these benefits and risks, including enhanced research, policy, and community engagement. The book concludes by examining the future of ocean stewardship and how global populations can unite to nurture and promote our life-enhancing relationship with oceans. This is an indispensable resource for students, researchers, communities, and industry specialists in marine sciences, public health, and international policy. - Addresses benefits, opportunities, risks, and impacts resulting from the relationship between oceans and humans, informed by more than 100 international authors - Identifies and links necessary tools to relevant disciplines for action, and provides illustrative international case studies - Covers scientific, socioeconomic, political, and ethical analyses behind the latest ocean and human health research - Provides study questions and horizon scans at the end of each chapter to encourage individual thought and action, offering a resource for course instructors, students, and communities