Zeddies
David G.
Zeddies
David G.
No Thumbnail Available
2 results
Search Results
Now showing
1 - 2 of 2
-
PreprintUse of the swim bladder and lateral line in near-field sound source localization by fishes( 2014-03) Coffin, Allison B. ; Zeddies, David G. ; Fay, Richard R. ; Brown, Andrew D. ; Alderks, Peter W. ; Bhandiwad, Ashwin A. ; Mohr, Robert A. ; Gray, Michael D. ; Rogers, Peter H. ; Sisneros, Joseph A.We investigated the roles of the swim bladder and the lateral line system in sound localization behavior by the plainfin midshipman fish (Porichthys notatus). Reproductive female midshipman underwent either surgical deflation of the swim bladder or cryoablation of the lateral line and were then tested in a monopolar sound source localization task. Fish with nominally “deflated” swim bladders performed similar to sham-deflated controls; however, post-experiment evaluation of swim bladder deflation revealed that a majority of “deflated” fish (88%, 7 of the 8 fish) that exhibited positive phonotaxis had partially inflated swim bladders. In total, 95% (21/22) of fish that localized the source had at least partially inflated swim- bladders, indicating that pressure reception is likely required for sound source localization. In lateral line experiments, no difference was observed in the proportion of females exhibiting positive phonotaxis with ablated- (37%) versus sham-ablated (47%) lateral line systems. These data suggest that the lateral line system is likely not required for sound source localization, although this system may be important for fine- tuning the approach to the sound source. We found that midshipman can solve the 180° ambiguity of source direction in the shallow water of our test tank, which is similar to their nesting environment. We also found that the potential directional cues (phase relationship between pressure and particle motion) in shallow water differs from a theoretical free-field. Therefore, the general question of how fish use acoustic pressure cues to solve the 180° ambiguity of source direction from the particle motion vector remains unresolved.
-
ArticleOffshore wind energy development: Research priorities for sound and vibration effects on fishes and aquatic invertebrates(Acoustical Society of America, 2022-01-11) Popper, Arthur N. ; Hice-Dunton, Lyndie ; Jenkins, Edward ; Higgs, Dennis M. ; Krebs, Justin ; Mooney, T. Aran ; Rice, Aaron N. ; Roberts, Louise ; Thomsen, Frank ; Vigness-Raposa, Kathleen J. ; Zeddies, David G. ; Williams, Kathryn A.There are substantial knowledge gaps regarding both the bioacoustics and the responses of animals to sounds associated with pre-construction, construction, and operations of offshore wind (OSW) energy development. A workgroup of the 2020 State of the Science Workshop on Wildlife and Offshore Wind Energy identified studies for the next five years to help stakeholders better understand potential cumulative biological impacts of sound and vibration to fishes and aquatic invertebrates as the OSW industry develops. The workgroup identified seven short-term priorities that include a mix of primary research and coordination efforts. Key research needs include the examination of animal displacement and other behavioral responses to sound, as well as hearing sensitivity studies related to particle motion, substrate vibration, and sound pressure. Other needs include: identification of priority taxa on which to focus research; standardization of methods; development of a long-term highly instrumented field site; and examination of sound mitigation options for fishes and aquatic invertebrates. Effective assessment of potential cumulative impacts of sound and vibration on fishes and aquatic invertebrates is currently precluded by these and other knowledge gaps. However, filling critical gaps in knowledge will improve our understanding of possible sound-related impacts of OSW energy development to populations and ecosystems.