scholarly journals Accumulation of C-CTX1 in Muscle Tissue of Goldfish (Carassius auratus) by Dietary Experience

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 242
Author(s):  
Andres Sanchez-Henao ◽  
Natalia García-Álvarez ◽  
Daniel Padilla ◽  
María Ramos-Sosa ◽  
Freddy Silva Sergent ◽  
...  
Keyword(s):  
Body Weight ◽  
Experimental Model ◽  
Muscle Tissue ◽  
Carassius Auratus ◽  
Goldfish Carassius Auratus ◽  
Ciguatera Fish Poisoning ◽  
Recovery Capacity ◽  
Fish Poisoning ◽  
A Cell ◽  
And Control

Ciguatoxins (CTXs) are produced by dinoflagellates usually present in tropical and subtropical waters. These toxins are bioaccumulated and transformed in fish causing ciguatera fish poisoning (CFP) in humans. Few trials have been performed to understand how CTXs are incorporated into fish. This study developed an experimental model of goldfish (Carassius auratus) fed flesh contaminated with Caribbean ciguatoxin (C-CTX1). Fourteen goldfish were fed 0.014 ng CTX1B (Eq. g−1 of body weight) daily, and control goldfish received non-toxic flesh. CTX presence was determined by a cell-based assay on days 1, 8, 15, 29, 36, 43, and 84. Toxicity was detected in muscle from the second sampling and then seemed to stabilize at ~0.03 ng CTX1B Eq. g−1. After two weeks, all experimental goldfish developed lethargy and loss of brightness, but only two of them displayed erratic swimming and jerking movements near the sixth sampling. One of these fish had its toxic diet replaced by commercial food for 60 more days; the fish showed recovery signs within the first weeks and no CTX activity was detected. These results indicate that C-CTX1 could accumulate in goldfish muscle tissue and produce toxic symptoms, but also remarked on the detoxification and recovery capacity of this species.

Effects of orally-administrated mixed-diets on body weight, liver function and initial host defense of goldfish, Carassius auratus

1997 ◽  
Vol 21 (1) ◽  
pp. 71-72
Author(s):  
Yukiko Matsushima ◽  
Chie Kimura ◽  
Kazuki Orita ◽  
Hideki Ino ◽  
Kiyoshi Goto ◽  
...  
Keyword(s):  
Body Weight ◽  
Liver Function ◽  
Host Defense ◽  
Carassius Auratus ◽  
Goldfish Carassius Auratus

The Effect of Fin–Clipping on the Cruising Speed of Goldfish and Coho Salmon Fry

1950 ◽  
Vol 8a (2) ◽  
pp. 67-73 ◽  
Author(s):  
Roland W. Radcliffe
Keyword(s):  
Carassius Auratus ◽  
Coho Salmon ◽  
Loss Of Stability ◽  
Stability And Control ◽  
Goldfish Carassius Auratus ◽  
Salmon Fry ◽  
Constant Rate ◽  
Before And After ◽  
The Mean ◽  
And Control

Goldfish (Carassius auratus L.) and coho salmon fry (Oncorhynchus kisutch Walbaum) were acclimatized to temperatures of 20 °C. and 3 °C. respectively. The fish were placed, one at a time, once a day, for ten days, in a rotating annular chamber and the cruising speed was found. Then various fins were removed and the fish were given ten more trials. The mean cruising speeds before and after clipping were compared. The clipped fish suffered no loss in ability to swim at a constant rate. The data suggest that, for fish of a given weight and length, cruising speed is slightly improved by clipping. Any increased mortality in marked fish is due to loss of stability and control rather than loss in ability to swim steadily.

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.

The effect of 17β-estradiol on spontaneous ovulation in the goldfish, Carassius auratus

1985 ◽  
Vol 63 (12) ◽  
pp. 2979-2981 ◽  
Author(s):  
N. W. Pankhurst ◽  
N. E. Stacey
Keyword(s):  
Body Weight ◽  
Carassius Auratus ◽  
Mature Female ◽  
Goldfish Carassius Auratus ◽  
17Β Estradiol ◽  
Gonadotropin Surge ◽  
Sexually Mature

Sexually mature female goldfish were treated daily with 17β-estradiol in oil (2 μg∙g body weight−1) or given a single silastic pellet containing 17β-estradiol (50 μg∙g−1) and held under conditions which promote spontaneous ovulation. Levels of 17β-estradiol were found to be significantly elevated by the treatments during the period prior to ovulation. However, neither of the 17β-estradiol treatments had any effect on gonadotropin levels or the number of fish ovulating. A decline in the level of serum 17β-estradiol does not appear to be a critical requisite for the occurrence of the preovulatory gonadotropin surge in goldfish.

SEM of Hepatocytes and Biliary Passages in Goldfish Liver

1977 ◽  
Vol 35 ◽  
pp. 556-557
Author(s):  
Waykin Nopanitaya ◽  
Joe W. Grisham ◽  
Johnny L. Carson
Keyword(s):  
Carassius Auratus ◽  
Cell Layer ◽  
Three Dimensional ◽  
Cell Types ◽  
Biliary System ◽  
Fish Food ◽  
Commercial Fish ◽  
Goldfish Carassius Auratus ◽  
Commercial Fish Food

An interesting feature of the goldfish liver is the morphology of the hepatic plate, which is always formed by a two-cell layer of hepatocytes. Hepatic plates of the goldfish liver contain an infrequently seen second type of cell, in the centers of plates between two hepatocytes. A TEH study by Yamamoto (1) demonstrated ultrastructural differences between hepatocytes and centrally located cells in hepatic plates; the latter were classified as ductule cells of the biliary system. None of the previous studies clearly showed a three-dimensional organization of the two cell types described. In the present investigation we utilize SEM to elucidate the arrangement of hepatocytes and bile ductular cells in intralobular plates of goldfish liver.Livers from young goldfish (Carassius auratus), about 6-10 cm, fed commercial fish food were used for this study. Hepatic samples were fixed in 4% buffered paraformaldehyde, cut into pieces, fractured, osmicated, CPD, mounted Au-Pd coated, and viewed by SEM at 17-20 kV. Our observations were confined to the ultrastructure of biliary passages within intralobular plates, ductule cells, and hepatocytes.

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