Lidia Eva Wysocki

Department of Biology
The University of Maryland
College Park, MD 20742

Phone: (301) 405-6903

Curriculum Vitae

Oct. 20004 - present Postdoctoral training at the University of Maryland, College Park, MD. Biology.
Dec. 2003 - Sept. 2004 Postdoctoral training at the Institute of Zoology, University of Vienna
Nov. 2003 Doctoral degree of natural sciences (Dr. rer. nat) at the University of Vienna, Austria
July 2000

Master’s degree (Mag. rer. nat.) of zoology at the University of Vienna, Austria

Research Interests

My main research interests have been hearing, sound production and acoustic communication in fish. Among teleosts, there exists an astonishing variety of sound-producing and hearing mechanisms. This has raised the question whether the hearing specializations found in some groups of teleosts represent special adaptations to intraspecific acoustic communication. In this context, I have investigated the ontogeny of hearing together with the ontogeny of sound production in the croaking gourami Trichopsis vittata (Wysocki and Ladich, 2001), temporal resolution abilities (Wysocki and Ladich, 2002) and the representation of conspecific sounds in the auditory brainstem of fishes (Wysocki and Ladich, 2003) during my diploma and doctoral thesis in Vienna (


Recently, I have become interested in how noise affects fish. Fish are exposed to an ever increasing amount of anthropogenic noise in their natural habitats. Considerable noise levels are also found in fish hatching and -keeping facilities. The potential impacts on fish can be manifold. For example masking relevant acoustic signals can impair intraspecific acoustic communication, as well as the detection of prey and predators. In addition, increased noise levels may also  lead to stress (a deleterious effect of noise well documented in humans and other mammals) und thus affect the health and fitness of fish. To understand some of the possible noise effects on fish, I have investigated masking (Wysocki and Ladich, 2005) in three species of teleosts with different hearing abilities and the effects of intense noise on hearing thresholds and temporal resolution (Wysocki and Ladich, 2005) in goldfish.

Shipping is one major source of anthropogenic noise in the natural environment of fishes. Measurements of noise emissions and comparisons to audiograms (Amoser et al., 2004) have shown that recreational shipping (power boat race) can affect their hearing to a different extent depending on their hearing mechanisms. I have also found noise-induced stress responses elicited by playbacks of vessel noise in several freshwater fishes (Wysocki et al., 2004).

Currently, I am involved in several research projects investigating the effects of anthropogenic sound on fishes with the main interest on hearing loss and the underlying mechanisms. One project studies the effects of Low-Frequency Active (LFA) sonar on behavior and hearing of different fish species. Additionally, we are studying the effects of noise produced in aquaculture and during fish transport on the health and hearing of fish.


Scientific Publications

Wysocki, L.E., Ladich, F. Detection of communication sounds. In: Fish Communication. Ladich, F., Collin, S.P., Moller, P., Kapoor, B.G. (eds.). Narosa Publ. House, New Delhi, in press.

Wysocki, L.E., Ladich, F., 2005. Hearing in fishes under noise conditions. JARO, in press.

Wysocki, L.E., Ladich, F., 2005. Effects of noise exposure on click detection and the temporal resolution ability of the goldfish auditory system. Hear. Res. 201, 27–36.

Wysocki, L.E., Ladich F., Dittami, J.P., 2004. Noise, stress, and cortisol secretion in teleost fishes. Horm. Behav. 46, 125.

Ladich, F., Wysocki, L.E., 2003. How does Weberian ossicle extirpation affect hearing              sensitivity in otophysine fishes? Hear. Res. 182, 119-129.

Wysocki, L.E., Ladich, F., 2003. The representation of conspecific sounds in the auditory brainstem of teleost fishes. J. Exp. Biol. 206, 2229-2240.

Wysocki, L.E., Ladich, F., 2002b. Can fishes resolve temporal characteristics of sounds? New insights using auditory brainstem responses. Hear. Res. 169, 36-46.

Wysocki, L.E., Ladich, F., 2002a. Ontogeny of hearing and sound production in fishes. Bioacoustics 12 ,183-185.

Wysocki, L.E., Ladich, F., 2001. The ontogenetic development of auditory sensitivity, vocalization and acoustic communication in the labyrinth fish Trichopsis vittata. J. Comp. Physiol. A 187, 177-187.

Scientific Presentations

July 2004

8th Annual Meeting of the Society for Behavioral Neuroendocrinology, Lisboa (Portugal): “Noise, stress, and cortisol secretion in teleost fishes”, L.E. Wysocki, F. Ladich, and J. P. Dittami
July 2003  First International Conference on Acoustic Communication by Animals, College Park: “Hearing in otophysine fishes under noise conditions”, L.E. Wysocki & F. Ladich
Nov. 2002 32th Annual Meeting of the Society for Neuroscience, Orlando (Florida): “The representation of conspecific sounds in the auditory system of  teleost fishes”, L.E. Wysocki & F. Ladich
Sept. 2001  Austrian Neuroscience Association, 7th Meeting, Seggau: “Is the auditory system of fishes adapted to the resolution of temporal patterns of  intraspecific sounds?”, L.E. Wysocki & F. Ladich
July 2001 6th International Congress of Neuroethology, Bonn: “Can fishes resolve temporal characteristics of sounds? New insights using auditory brainstem responses”, L.E. Wysocki & F. Ladich
May 2001 Fish Bioacoustics Meeting, Chicago (Illinois): Ontogeny of hearing and sound production in fishes”, L.E. Wysocki & F. Ladich
Nov. 2000 30th Annual Meeting of theSociety for Neuroscience, New Orleans (Lousiana): “Ontogenetic development of auditory sensitivity and vocalization in croaking gouramis (Teleosts)”, L.E. Wysocki & F. Ladich

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