ULTRAVIOLET SENSITIVITY IN THE TORUS SEMICIRCULARIS OF JUVENILE RAINBOW-TROUT (ONCORHYNCHUS-MYKISS)

被引:22
|
作者
COUGHLIN, DJ [1 ]
HAWRYSHYN, CW [1 ]
机构
[1] UNIV VICTORIA,DEPT BIOL,VICTORIA V8W 2Y2,BC,CANADA
关键词
ULTRAVIOLET VISION; SPECTRAL SENSITIVITY; SINGLE UNIT; WAVELENGTH DISCRIMINATION; POLARIZATION SENSITIVITY;
D O I
10.1016/0042-6989(94)90140-6
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The spectral sensitivity of single units in the torus semicircularis (TS) of small (< 30 g) and large (> 60 g) juvenile rainbow trout, Oncorhynchus mykiss, was investigated. All examined units (n = 39) showed inputs from the long and medium cone mechanisms. In addition, a majority of units (28 of 39) in both size groups of fish had inputs from the UV cone mechanism, and both groups had several types of color-coded units. The TS of large trout differed from small fish by having a significantly higher proportion of luminance or non-color-coded units relative to color-coded units. Additionally, large fish had a reduced number of UV-sensitive units and an increased number of short-wavelength-sensitive units relative to small fish.
引用
收藏
页码:1407 / 1413
页数:7
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