Table 1 1 1
The Comparative Physiology and Pharmacology of the Neurohypophysis in Fish
The actions of neurohypophysial principles in fish
ReproNeurohypohysial principles Waterduction, duction, Control of
balance
Na+
spawnegg
adenohyClass
Basics
Neutral
effect'
Kidney'
metabolism' pressor'
ingb
laying'
pophysisb.6
Miscellaneous'
Cyclostomes
(a) Myxiniformes
Unknown
?
+
(b) Petromyzoniformes AVT
?
(AVT?)
-
Elasmobranchs
AVT
(trace)
Holocephalians
AVT
(trace)
Brachiopterygians
AVT
Chondrosteans
AVT
Holosteans
.4VT
Teleosts
AVT
Dipnoans
(1) 4 Ser, 8 Gln
oxytocin
(2) Unknown
(EOPI)
-
Oxytmin
(?)
4 Ser. 8 Ile
oxytocin
Unknown
(trace)
4 Ser, 8 Ile
oxytocin
4 Ser, 8 Ile
oxytocin
-
AVT
(1) 8 Ile
-
oxytocin
(2) oxytocin
(1)
+
+
(1)
Na+ conc. urinet
+
K+ conc. urinet
Na+ loss
(not diuretic)
Doubtful
-
+
+
Diuretic GFRt
Na+ loss
and gain
+
+
Diuretic GFRt
Na+ loss
Na+ conc. urinet
Doubtful
Affect water
Possible Possible Possible
Raise blood
(? )
(?)
sugar
and salt balance
-
+ (?) Stimulate
+
Inhibition,
smooth muscle
pars intermedia
Possible
(anat.)
(anat.)
(?)
(?)
(anat.)
(anat.)
Possible
Possible Possible Possible
Possible
+
+
+ Probable Osmoregulation
+
Possible
(anat.)
AVT stands for arginine vasotocin.
' Here + indicates an effect has been seen: - indicates negative results have been obtained; and blank spaces indicate that there is insufficient data t o make any
judgment.
anat. indicates evidence on anatomical grounds only.