Ashwin received a BA in Biophysics at Johns Hopkins University (2007)
and a MA/MS in Biology/Marine Biology at Northeastern University (2009).
Before entering the PhD program at the University of Washington he was
a Research Associate at Duke University in the lab of Sonke Johnsen (2009-2010).
Ashwin joined the Sisneros lab in the Fall 2010.
Ashwin is interested
in understanding how dynamic environments shape sensory performance. His
work focuses on hearing sensitivity in larval fishes during ontogeny and
after acute noise exposure. He is also working on a project seeking to
understand how ecological factors can lead to evolutionary divergence
in visual specialization in a three-spined stickleback species pair.
Ashwin's work has led to the development of a behavioral assay using prepulse
inhbition (PPI) of the acoustic startle response to measure auditory thresholds
in 5 dpf zebrafish. This assay has been used to show that auditory sensitivity
at frequencies above 90 Hz are not dependent on the lateral line in these
animals. Ashwin's dissertation work focuses on the effects of acute noise
exposure and its effects on startle response sensitivity and loss of PPI.
Ashwin is also working on a project to behaviorally measure differences
in low-level visual perception in the three-spined stickleback (Gasterosteus
aculeatus) between a sympatric benthic-limnetic species pair.
Ashwin is also an associate organizer of the Beneath the Waves Film Festival
Coffin AB, Zeddies
DG, Fay RR, Brown AD, Alderks PW, Bhandiwad AA, Mohr RA, Gray MD,
Rogers PH and JA Sisneros. In Press. Use of the swim bladder and
lateral line in near-field sound source localization by fishes. Journal
of Experimental Biology.
Staaterman ER, Bhandiwad
AA, Gravinese PM, Moeller PM, Reichenbach ZC, Shantz AA, Shiffman
DS, Toth LT, Warneke AM, and AJ Gallagher. 2014. Lights, camera, science:
The utility and growing popularity of film festivals at scientific meetings.
Ideas in Ecology and Evolution 7:11-16.
AA, Zeddies DG, Raible DW, Rubel EW and JA Sisneros. 2013. Auditory sensitivity
of larval zebrafish (Danio rerio) measured using a behavioral prepulse
inhibition assay. Journal of Experimental Biology 216:3504-3513.
Petersen CL, Timothy
M, Kim DS, Bhandiwad AA, Mohr RA, Sisneros JA, and PM Forlano.
2013. Exposure to advertisement calls of reproductive competitors activates
vocal-acoustic and catecholaminergic neurons in the plainfin midshipman
fish, Porichthys notatus. Public Library of Science One 8(8):e70474
Bhandiwad AA and S Johnsen 2011. The effects of salinity and temperature
on the transparency of the grass shrimp Palaemonetes pugio. Journal
of Experimental Biology 214:709-718.