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Biochemical, histological and behavioural aspects of visual function during early development of rainbow trout

Journal of Fish Biology

By:
, ,
DOI: 10.1111/j.1095-8649.2004.0350.x

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Abstract

Retinal structure and concentration of retinoids involved in phototransduction changed during early development of rainbow trout Oncorhynchus mykiss, correlating with improvements in visual function. A test chamber was used to evaluate the presence of optokinetic or optomotor responses and to assess the functionality of the integrated cellular, physiological and biochemical components of the visual system. The results indicated that in rainbow trout optomotor responses start at 10 days post-hatch, and demonstrated for the first time that increases in acuity, sensitivity to low light as well as in motion detection abilities occur from this stage until exogenous feeding starts. The structure of retinal cells such as cone ellipsoids increased in length as photopic visual acuity improved, and rod densities increased concurrently with improvements in scotopic thresholds (2.2 log10 units). An increase in the concentrations of the chromophore all-trans-retinal correlated with improvements of all behavioural measures of visual function during the same developmental phase. ?? 2004 The Fisheries Society of the British Isles.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Biochemical, histological and behavioural aspects of visual function during early development of rainbow trout
Series title:
Journal of Fish Biology
DOI:
10.1111/j.1095-8649.2004.0350.x
Volume
64
Issue:
4
Year Published:
2004
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
833
Last page:
850
Number of Pages:
18