NDLI: Evolution of a behavioral shift mediated by superficial neuromasts helps cavefish find food in darkness

Content Provider	PubMed Central
Author	Yoshizawa, Masato Gorčiki, Špela Soares, Daphne Jeffery, William R.
Copyright Year	2010
Abstract	How cave animals adapt to life in darkness is a poorly understood aspect of evolutionary biology [1]. Here we identify a behavioral shift and its morphological basis in Astyanax mexicanus, a teleost with a sighted surface dwelling form (surface fish) and various blind cave dwelling forms (cavefish) [2–4]. Vibration attraction behavior (VAB) is the ability of fish to swim toward the source of a water disturbance in darkness. VAB was typically seen in cavefish, rarely in surface fish, and advantageous for feeding success in the dark. The potential for showing VAB has a genetic component and is linked to the mechanosensory function of the lateral line. VAB was evoked by vibration stimuli peaking at 35 Hz, blocked by lateral line inhibitors, appeared after developmental increases in superficial neuromast (SN) number and size [5–7], and was significantly reduced by bilateral ablation of SN. We conclude that VAB and SN enhancement co-evolved to compensate for loss of vision and help blind cavefish find food in darkness.
Related Links	http://dx.doi.org/10.1016/j.cub.2010.07.017
Ending Page	1636
Page Count	6
Starting Page	1631
File Format	PDF
ISSN	09609822
e-ISSN	18790445
Journal	Current biology : CB
Issue Number	18
Volume Number	20
Language	English
Publisher Date	2010-09-01
Access Restriction	Open
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Neuroscience Biochemistry, Genetics and Molecular Biology Agricultural and Biological Sciences

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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