The Effect of Unilateral and Bilateral Eyestalk Ablation on Haemolymph Osmotic and Ionic Regulation and Gill Na+, K+-atpase Activity In Marsupenaeus Japonicus (bate, 1888) (Decapoda, Natantia)

Crustaceana ◽  
2004 ◽  
Vol 77 (4) ◽  
pp. 385-395 ◽  
Author(s):  
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◽  
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Keyword(s):  
Atpase Activity ◽  
Ionic Regulation ◽  
Marsupenaeus Japonicus ◽  
Eyestalk Ablation

Effects of tributyltin compounds on ionic regulation and gill ATPase activity in estuarine fish

1989 ◽  
Vol 92 (1) ◽  
pp. 125-129 ◽  
Author(s):  
Alfred E. Pinkney ◽  
David A. Wright ◽  
Michael A. Jepson ◽  
David W. Towle
Keyword(s):  
Atpase Activity ◽  
Estuarine Fish ◽  
Ionic Regulation

scholarly journals MODULATION OF SCREENING-PIGMENT POSITION IN CRAYFISH PHOTORECEPTORS BY SEROTONIN: POSSIBLE INVOLVEMENT OF Na+/K+-ATPase ACTIVITY

1989 ◽  
Vol 143 (1) ◽  
pp. 459-473
Author(s):  
EUGENIO FRIXIONE ◽  
JORGE HERNÁNDEZ
Keyword(s):  
Atpase Activity ◽  
Membrane Fraction ◽  
Serotonin Antagonists ◽  
Ionic Regulation ◽  
Transport Mechanisms ◽  
Simultaneous Addition ◽  
Screening Pigment ◽  
Stimulation Of

The possibility that serotonin might play a role in the modulation of screening-pigment position in crayfish photoreceptors was explored through experiments with isolated eyes and a membrane fraction from retinal homogenates. In the isolated eye serotonin (≥10−4 moll−1) and some of its agonists exerted a limited dark-adapting influence over the pigment position, irrespective of the presence or absence of light, and this effect was abolished by the simultaneous addition of serotonin antagonists. In the retinal membrane fraction serotonin and quipazine produced a methysergide-sensitive stimulation of the Na+/K+-ATPase activity. These results are interpreted in terms of a serotonin-mediated efferent input on the photoreceptors, which would affect the ionic regulation of the pigment transport mechanisms.

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