Use of an otolith-deficient mutant in studies of fish behavior in microgravity

Details Use of an otolith-deficient mutant in studies of fish behavior in microgravity Use of an otolith-deficient mutant in studies of fish behavior in microgravity

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003adspr..32.1501i&link_type=abstract

Advances in Space Research, Volume 32, Issue 8, p. 1501-1512.

Other

Scientific paper

The mutant strain (ha) of medaka (Oryzias latipes) lack utricular otoliths as fry, and some never form otoliths for life. The cross (Fl generation) between the strain having good eyesight and another strain having ordinary eyesight augmented visual acuity of the Fl generation. Crossing the good eyesight strain and ha mutant produced fish having good eyesight and less sensitivity to gravity in the F2 population. Their tolerance to microgravity was tested by parabolic flight using an airplane. The fish exhibited less looping and no differences in degree of looping between light and dark conditions, suggesting that loss of eyesight (in darkness) is not a direct cause for looping behavior in microgravity. The ha embryos could not form utricular otoliths. They did form saccular otoliths, but with a delay. Fry of the mutant fish lacking the utricular otoliths are highly dependent on light upon hatching and exhibit a perfect dorsal-light response (DLR). As they grow, they eventually shift from being light-dependent to being gravity-dependent. Continuous treatment of the fry with altered light direction suppressed this shift to gravity dependence. Being less dependent on gravity, these fish can serve as models in studying the differences expected for the vestibular system of fish reared in microgravity. When these fish were exposed to microgravity (parabolic flights) of an airplane, they spent far less time looping than fish reared in an ordinary light regimen.

Affiliated with

Also associated with

No associations

Rating

Use of an otolith-deficient mutant in studies of fish behavior in microgravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Use of an otolith-deficient mutant in studies of fish behavior in microgravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of an otolith-deficient mutant in studies of fish behavior in microgravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-912285