Short-Term Serum Cortisol Concentrations in Goldfish (Carassius auratus) Subjected to Serial Sampling and Restraint

1974 ◽  
Vol 31 (7) ◽  
pp. 1240-1242 ◽  
Author(s):  
Richard E. Spieler
Keyword(s):  
Carassius Auratus ◽  
Serum Cortisol ◽  
Light Period ◽  
Short Term ◽  
Goldfish Carassius Auratus ◽  
Serial Sampling ◽  
Initial Capture

Serum cortisol from serially sampled goldfish (Carassius auratus) did not demonstrate a stress-evoked increase (P >.05) until 10–22 min after initial capture. This response did not differ (P > 0.5) among fish sampled at the beginning, middle, and end of a 12-h light period.

Short-Term Serum Prolactin Concentrations in Goldfish (Carassius auratus) Subjected to Serial Sampling and Restraint

1976 ◽  
Vol 33 (1) ◽  
pp. 183-186 ◽  
Author(s):  
Richard E. Spieler ◽  
Albert H. Meier
Keyword(s):  
Carassius Auratus ◽  
Marked Decrease ◽  
Circadian Variation ◽  
Serum Prolactin ◽  
Short Term ◽  
Goldfish Carassius Auratus ◽  
Serial Sampling ◽  
The Times ◽  
Initial Capture

Serum prolactin concentrations in serially sampled goldfish (Carassius auratus) did not vary significantly between 30 s and 3 min after initial capture. A marked decrease in prolactin concentration was noted 9–17 min after initial capture followed by a recovery at 30–48 min. Although there was a circadian variation in prolactin concentration, the pattern of response to capture and sampling did not vary significantly among the times tested.

Stress and adrenocorticosteroid dynamics in the goldfish, Carassius auratus

1975 ◽  
Vol 53 (8) ◽  
pp. 1012-1020 ◽  
Author(s):  
James N. Fryer
Keyword(s):  
Significant Variation ◽  
Carassius Auratus ◽  
Dark Period ◽  
Serum Cortisol ◽  
Light Period ◽  
Sham Injection ◽  
Goldfish Carassius Auratus ◽  
Competitive Protein Binding ◽  
Two Peaks ◽  
Circulating Levels

In goldfish serum, cortisol was found to constitute 77.6% of the adrenocorticosteroids measured by a competitive protein-binding radioassay. Adult goldfish maintained on a photoperiod of 14 h light: 10 h dark in November exhibited no significant variation in serum corticosteroid concentration throughout the 24-h cycle. Goldfish maintained in an 8L:16D photoperiod in June exhibited two peaks in serum adrenocorticosteroid concentration. Four hours before the onset of the light period and 4 h after the onset of the light period, serum corticosteroids were significantly higher than those observed at the midpoint of the dark period. After sham injection, swimming in shallow water, or a thermal shock, but not a handling disturbance, circulating levels of corticosteroids were significantly higher than in undisturbed fish. Betamethasone injected 24 h before a thermal stress completely blocked the stress-induced increase in serum corticosteroids observed in vehicle-injected and uninjected goldfish, demonstrating the potency of this steroid as a blocker of the pituitary–interrenal axis in this species.

Effects of short-term starvation on the rhythmic expression of microRNAs in skeletal muscle of goldfish (Carassius auratus )

2017 ◽  
Vol 49 (2) ◽  
pp. 726-737 ◽  
Author(s):  
Ping Wu ◽  
Jun Shi ◽  
Chengyong Yang ◽  
Fangliang Zhang ◽  
Yulong Li ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Carassius Auratus ◽  
Short Term ◽  
Rhythmic Expression ◽  
Goldfish Carassius Auratus

Brain lesions and short-term endocrine effects of monosodium L-glutamate in goldfish, Carassius auratus

1980 ◽  
Vol 212 (3) ◽  
Author(s):  
RichardE. Peter ◽  
Olivier Kah ◽  
ChristineR. Paulencu ◽  
Harry Cook ◽  
AnnL. Kyle
Keyword(s):  
Carassius Auratus ◽  
Brain Lesions ◽  
Endocrine Effects ◽  
Short Term ◽  
Goldfish Carassius Auratus

Anaerobic metabolism in goldfish (Carassius auratus)

1977 ◽  
Vol 55 (8) ◽  
pp. 1304-1311 ◽  
Author(s):  
R. M. Walker ◽  
P. H. Johansen
Keyword(s):  
Carassius Auratus ◽  
Glycogen Phosphorylase ◽  
Anaerobic Metabolism ◽  
Liver Glycogen ◽  
Energy Yield ◽  
Low Oxygen ◽  
Short Term ◽  
Liver Size ◽  
Goldfish Carassius Auratus ◽  
Glycogen Stores

At 20 °C goldfish survive anaerobic conditions for only a few hours while at 4 °C survival is extended to several days. During the course of low-temperature anaerobiosis there was a rise in blood glucose and lactate, a decline in liver glycogen concentration, and an increase in liver water content, while liver size remained constant.The better cold anaerobic survival of winter and hypophysectomized goldfish compared with spring and sham-operated animals was correlated with greater glycogen stores in the livers of the former. It is concluded that liver glycogen is a necessary energy source during cold anaerobiosis, and it is suggested that the resulting hyperglycemia may represent a mechanism to increase glycolytic energy yield. Cold anaerobiosis also resulted in elevated liver glucose-6-phosphatase (EC 3.1.3.9) activity, suggesting an increase in glycogenolysis, but no change in glycogen phosphorylase (EC 2.4.1.1) activity. While cold anaerobic survival is short term it is possible that liver glycogen may sustain goldfish for longer periods at low oxygen levels through a mixed aerobic–anaerobic metabolism.

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