to Dr. Arthur N. Popper's Laboratory of Aquatic Bioacoustics
I have retired from my facutly position
and no longer have a lab. Thus, I am not able to supervise
undergraduate students, graduate students, or postdocs.
I will, however, continue my active
involvement in research and other activities through collaborations
and outreach. Some of my current activities include:
My research has
primarily involved the study of hearing by aquatic organisms. Most
work focuses on fishes,
although studies have been done with other non-mammalian vertebrates.
Our fish studies have focused on various aspects of hearing that range
from behavioral investigations to determine what an animal can hear
to physiological investigations of the responses of the ear and
The majority of my work
is now involved with studies on the
effects of human-generated
(anthropogenic) sound on aquatic organisms. This has resulted in
a series of studies that explored behavioral and physiological
effects of increased ambient sounds on fish. These
studies have asked about effects of seismic air-guns, pile driving,
and general increases in background sound levels on fish hearing and
Investigations in the
past have ranged
from basic questions concerning evolution and mechanisms of sound
detection, investigations of hearing sensitivity, studies on the
anatomy and ultrastructure of the ear, and many other topics (see
publications link at left).
Effects of Noise on
Over the past several years, I have been
involved in the organization of several international meetings on
the Effects of Noise on Aquatic Life. Another meeting took place in 2013 in
book tco-edited with Dr. Anthony Hawkins on the
presentations at the 2010 meeting in Cork, Ireland, has been published. A book from the Budapest meeting will be
forthcoming in 2015. We are now planning the 2016 meeting.
For the past several years I have been working
with colleagues from around the world to develop "guidelines" on the
effects of noise on fishes and sea turtles. The report of this work
will be published in July 2014 as:
Hawkins, A.D., Fay, R.R., Mann, D., Bartol, S., Carlson, T., Coombs,
S., Ellison, W.T., Gentry, R., Halvorsen, M.B., Løkkeborg, S.,
Rogers, P., Southall, B.L., Zeddies, D., Tavolga, W.N. (2014) Sound
Exposure Guidelines for Fishes and Sea Turtles: A Technical Report
prepared by ANSI-Accredited Standards Committee S3/SC1 and
registered with ANSI. ASA S3/SC1.4 TR-2014. Springer and ASA Press,
My longtime colleague and friend
Dr. Richard Fay and I have
recently published their 25th co-authored paper.
Fay, R. R. and Popper, A. N. (2012).
Fish hearing: New
perspectives from two “senior” bioacousticians. Brain, Behaviour and
Evolution 792:215-217. DOI: 10.1159/000338719
Recent Papers on Effects of Pile Driving on FIshes:
M.B., Casper, B.M., Woodley, C.M., Carlson, T.J., and Popper,
A.N. (2011). Predicting and mitigating hydroacoustic impacts
on fish from pile installations. NCHRP Research Results
Digest 363, Project 25-28, National Cooperative Highway Research
Program, Transportation Research Board, National Academy of
Sciences, Washington, D.C.
Halvorsen, M. B., Casper, B. M, Woodley, C. M.,
Carlson, T. J., and Popper, A. N. (2012).
Threshold for onset
of injury in Chinook salmon from exposure to impulsive pile driving
sounds. PLoS ONE, 7(6)
Casper, B. M., Popper, A. N., Matthews, F., Carlson,
T. J., and Halvorsen, M. B. (2012).
Recovery of barotrauma injuries in Chinook salmon,
from exposure to pile driving sound. PLoS ONE,
7(6): e39593. doi:10.1371/journal.pone.0039593.
Halvorsen, M. B., Casper, B. M., Matthews, F.,
Carlson, T. J., and Popper, A. N. (2012).
Effects of exposure
to pile driving sounds on the lake sturgeon, Nile tilapia,
and hogchoker. Proceedings of the Royal Society B.
279, 4705-4714 doi:
Casper, B. M., Smith, M. E., Halvorsen, M. B., Sun,
H., Carlson, T. J., and Popper, A. N. (2013). Effects of exposure to
pile driving sounds on fish inner ear tissues. Comparative
Biochemistry and Physiology A, 166:352-360.
Casper, B. M. Halvorsen, M. B., Mathews, F., Carlson,
T. J., and Popper, A. N. (2013). Recovery of barotrauma injuries
resulting from exposure to pile driving sounds in two sizes of
hybrid striped bass. PLoS ONE,
8(9): e73844. doi:10.1371/journal.pone.0073844
N.., Halvorsen, M. B., Casper, B. M, and Carlson, T. J.
(2013). U. S. Dept. of the Interior, Bureau of Ocean Energy
Management, Headquarters, Herndon, VA. Effects of Pile Sounds on
Tissues of Fish. OCS Study BOEM 2012-105. 60 pp.
Link - reference OCS Study BOEM 2012-105
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