Loss of Schooling Behavior in Cavefish through Sight-Dependent and Sight-Independent Mechanisms

Loss of Schooling Behavior in Cavefish through Sight-Dependent and Sight-Independent Mechanisms

BACKGROUND Surface populations of Astyanax mexicanus, living in rivers like their common ancestors, school, while several, independently derived cave populations of the same species have lost schooling behavior. RESULTS We quantify schooling behavior in individual A. mexicanus and identify quantitative trait loci (QTL) for this trait. We find that the evolutionary modulation of schooling has ...

Restoring sight in blind cavefish

which sleep uni-hemispherically or bi-hemispherically depending on the context [3], captive cetaceans almost never sleep bilaterally [ ,8,9] even when they are motionless [ 0]. Unraveling how marine mammals manage the inherent tradeoff [3] between wakefulness and sleep will require the development of procedures for observing eye closure and other physiological variables, including EEG, in free-...

Preventing sight loss from maculopathy

When to do macular laser The threshold for macular laser is usually clinically significant macular oedema (CSMO) as defined in the Early Treatment of Diabetic Retinopathy Study (ETDRS). CSMO is any retinal thickening (oedema) and/or exudates within 500 microns (1⁄3 disc diameter) of the centre of the fovea; or oedema greater than 1 disc area within 1 disc diameter of the foveal centre – includi...

Blindness, fear of sight loss, and suicide.

Numerous studies have examined the emotional impact exerted by sight loss. Research has tended to focus on clinical-diagnostic rather than therapeutic-preventive aspects. Blindness and sight restoration have been reported to induce both temporary and longer term psychopathology, usually followed by psychosocial readjustment. However, in some cases, readjustment may not occur and suicide may res...

Victorious Through Sight Word Recognition