scholarly journals The cytology of the pituitary gland of two varieties of goldfish (Carassius auratus L.), with some reference to variable factors in the gland which may possibly be related to the different morphological types

1939 ◽  
Vol 24 (4) ◽  
pp. 47-60
Author(s):  
Irving Levenstein
Keyword(s):  
Pituitary Gland ◽  
Carassius Auratus ◽  
Goldfish Carassius Auratus

The oxygen consumption of goldfish (Carassius auratus L.) after removal or autotransplantation of the pituitary gland

1973 ◽  
Vol 51 (12) ◽  
pp. 1289-1291 ◽  
Author(s):  
P. H. Johansen ◽  
J. D. Gomery
Keyword(s):  
Oxygen Consumption ◽  
Pituitary Gland ◽  
Muscle Tissue ◽  
Similar Pattern ◽  
Carassius Auratus ◽  
White Muscle ◽  
Goldfish Carassius Auratus

After either pituitary removal or pituitary autotransplantation, the routine oxygen consumption of goldfish is reduced significantly from control levels. A similar pattern appears to be reflected by the oxygen consumption of white muscle tissue.

scholarly journals Role of the Pituitary Gland in Melanization in the Skin of the Goldfish, Carassius auratus, Induced by X-ray Irradiation

1962 ◽  
Vol 38 (7) ◽  
pp. 345-347 ◽  
Author(s):  
Nobuo EGAMI ◽  
Hisami ETOH ◽  
Chikashi TACHI ◽  
Kazuko AOKI ◽  
Ryoichi ARAI
Keyword(s):  
Pituitary Gland ◽  
Carassius Auratus ◽  
X Ray ◽  
Goldfish Carassius Auratus

PRODUCTION AND FUNCTION OF SECRETONEURIN IN THE GOLDFISH (Carassius auratus) PITUITARY GLAND

2007 ◽  
Vol 77 (Suppl_1) ◽  
pp. 185-185
Author(s):  
E Zhao ◽  
Colin Cameron ◽  
Andrew Han Wen Chen ◽  
Ajoy Basak ◽  
Anderson On- Lam Wong ◽  
...  
Keyword(s):  
Pituitary Gland ◽  
Carassius Auratus ◽  
Goldfish Carassius Auratus ◽  
And Function

A non-histological method for determining the completeness of hypophysectomy in the goldfish (Carassius auratus)

1969 ◽  
Vol 47 (4) ◽  
pp. 324-325 ◽  
Author(s):  
P. H. Johansen ◽  
A. W. Roy
Keyword(s):  
Pituitary Gland ◽  
Carassius Auratus ◽  
Complete Removal ◽  
Goldfish Carassius Auratus ◽  
Histological Method

Experiments show that the loss of fin color of the goldfish correlates perfectly with the complete removal of the pituitary gland, and this color loss can be used as a criterion for determining the completeness of hypophysectomy.

The effects of photoperiod and temperature on the release of prolactin from the pituitary gland of the goldfish, Carassius auratus L.

1976 ◽  
Vol 54 (11) ◽  
pp. 1960-1968 ◽  
Author(s):  
B. A. McKeown ◽  
R. E. Peter
Keyword(s):  
Circadian Rhythm ◽  
Pituitary Gland ◽  
Carassius Auratus ◽  
Serum Prolactin ◽  
Prolactin Release ◽  
Temperature Conditions ◽  
Goldfish Carassius Auratus ◽  
Two Parameters ◽  
Pituitary Prolactin

A number of experiments were conducted to investigate the effects of photoperiod and temperature on prolactin release from the goldfish pituitary gland. Fish were acclimated to different photoperiods and temperatures, and also were subjected to a change in either of these two parameters after different acclimation conditions. Serum and pituitary samples were collected and analyzed by radioimmunoassay for prolactin levels. In other experiments samples for prolactin analysis were taken every 3 h intermittently over a period of 3 days from fish that were acclimated to different photoperiod and temperature conditions. Longer photoperiods and higher temperatures caused pituitary prolactin release. Serum prolactin changed on a circadian rhythm and the rhythm was modified depending on the length of the photoperiod.

The effects of hypophysectomy on liver glycogenolytic enzymes and starvation response in goldfish (Carassius auratus L.)

1977 ◽  
Vol 55 (8) ◽  
pp. 1297-1303 ◽  
Author(s):  
R. M. Walker ◽  
P. H. Johansen
Keyword(s):  
Pituitary Gland ◽  
Phosphatase Activity ◽  
Carassius Auratus ◽  
Glycogen Phosphorylase ◽  
Liver Glycogen ◽  
Sham Operation ◽  
Starvation Response ◽  
Glycogen Accumulation ◽  
Goldfish Carassius Auratus

The role of the pituitary gland in goldfish liver carbohydrate metabolism was studied by examining the effects of its removal on the livers of starved animals and on glycogenolytic enzymes.Five weeks starvation after hypophysectomy or sham operation resulted in significantly lower total liver glycogen levels compared with respective fed controls. The larger liver glycogen reserves of starved hypophysectomized fish than fed, sham-operated animals indicate gluconeogenesis is operating to produce glycogen.Glucose-6-phosphatase (EC 3.1.3.9) and glycogen phosphorylase (EC 2.4.1.1) were assayed in liver supernatant fractions from hypophysectomized and sham-operated goldfish. Hypophysectomy resulted in an apparent decline in the activity of glucose-6-phosphatase, but no change in glycogen phosphorylase, compared with sham-operated controls. Reduced glucose-6-phosphatase activity is consistent with lowered glycogenolysis as a cause of liver glycogen accumulation in hypophysectomized goldfish. It is suggested that reduced glycogenolysis could be related to reduced peripheral use of carbohydrate. The possible role of ACTH and glucocorticoids is discussed.

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