Trophic Control of Fishless Ponds by Tiger Salamander Larvae

Oikos ◽  
1994 ◽  
Vol 71 (1) ◽  
pp. 55 ◽  
Author(s):  
Joseph R. Holomuzki ◽  
James P. Collins ◽  
Paul E. Brunkow
Copeia ◽  
1998 ◽  
Vol 1998 (4) ◽  
pp. 1089 ◽  
Author(s):  
Judy P. Sheen ◽  
Howard H. Whiteman

2003 ◽  
Vol 297A (2) ◽  
pp. 147-159 ◽  
Author(s):  
Benjamin M Fitzpatrick ◽  
Michael F. Benard ◽  
James A. Fordyce

Oecologia ◽  
2000 ◽  
Vol 124 (2) ◽  
pp. 225-231 ◽  
Author(s):  
R. E. Ziemba ◽  
M. T. Myers ◽  
J. P. Collins

2001 ◽  
Vol 18 (1) ◽  
pp. 147-156 ◽  
Author(s):  
GAUTAM AWATRAMANI ◽  
JUE WANG ◽  
MALCOLM M. SLAUGHTER

The neuronal generators of the b- and d-waves of the electroretinogram (ERG) were investigated in the tiger salamander retina to determine if amacrine and ganglion cells contribute to this field potential. Several agents were used that affect third-order neurons, such as tetrodotoxin, baclofen, and NMDA agonists and antagonists. Baclofen, an agent that enhances light responses in third-order neurons, increased the d-wave and reduced the b-wave. In contrast, agents that decrease light responses in third-order neurons had the opposite effect of enhancing the b-wave and depressing the d-wave. The effect on the d-wave was particularly pronounced. The results indicate that third-order neuronal activity influences b- and d-waves of the ERG. The opposing actions suggest that the b-wave to d-wave ratio might serve as an measure of ganglion cell function.


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