The distribution and tissue retention of mercury-203 in the goldfish (Carassius auratus)

1973 ◽  
Vol 51 (2) ◽  
pp. 143-150 ◽  
Author(s):  
Melvin Weisbart
Keyword(s):  
Gall Bladder ◽  
Half Life ◽  
Carassius Auratus ◽  
Head Kidney ◽  
Linear Increase ◽  
The Body ◽  
Swim Bladder ◽  
Intestinal Tissue ◽  
Goldfish Carassius Auratus ◽  
Constant Rate

Goldfish injected intraperitoneally with 203Hg(NO3)2 lost mercury at an apparent constant rate resulting in a biological half-life of 568 h. Correlated with this loss was a linear increase in the amount of mercury in the water.The mercury-203 content in the tissues displayed four different responses.(1) Gall bladder, gonad, and spleen tissues showed no significant regressions.(2) Eye, kidney, and intestinal tissue manifested significant losses of mercury, but the rate of loss was not significantly different from that of the body as a whole.(3) Gill, heart, skin, and swim bladder tissues lost mercury at rates faster than the body as a whole.(4) Brain, liver, muscle, and head kidney tissues showed no significant losses of mercury.

Phytotherapy of ulcerative dermatitis induced by Aeromonas hydrophila infection in goldfish ( Carassius auratus )

2010 ◽  
Vol 58 (1) ◽  
pp. 29-37 ◽  
Author(s):  
Ramasamy Harikrishnan ◽  
Chellam Balasundaram ◽  
Young-Gun Moon ◽  
Man-Chul Kim ◽  
Ju-Sang Kim ◽  
...  
Keyword(s):  
Body Length ◽  
Aeromonas Hydrophila ◽  
Carassius Auratus ◽  
Curcuma Longa ◽  
Treated Group ◽  
The Body ◽  
Sublethal Dose ◽  
Ocimum Sanctum ◽  
Goldfish Carassius Auratus ◽  
Successful Recovery

Goldfish ( Carassius auratus ) weighing 13 ± 2 g were administered intramuscularly a sublethal dose (1.8 × 10 3 cfu/ml) of Aeromonas hydrophila to induce ulcerative dermatitis. On day 3 and day 6 after infection the fish were dip-treated (for 5 min/day) with a tri-herbal concoction of Curcuma longa, Ocimum sanctum and Azadirachta indica (1%). The LD 50 value was recorded at a concentration of 2.3 × 10 4 between 30 and 36 days after infection. In the infected untreated group the cumulative mortality was higher, while in the early-treated group (day 3) there was no mortality. In the late-treated group (6th day) the mortality increased to 23.3% on day 36. In the infected group the size of ulcers progressively increased from 43.3% of the body length on day 18 to 86.7% on day 36. In the early-treated fish the size of ulcers was 23.3% of the body length on day 18; by day 36 after treatment the ulcer had completely healed. In contrast, there was only a moderate recovery in the late-treated group. From the results it can be concluded that early tri-herbal treatment ensures successful recovery from ulcerative dermatitis induced by A. hydrophila .

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 Nacteous (Mottled) Group of the Goldfish (Carassius auratus L.), with an Analysis of the Colours Seen in these Fish

1952 ◽  
Vol 3 (2) ◽  
pp. 126 ◽  
Author(s):  
RJ Affleck
Keyword(s):  
Carassius Auratus ◽  
Yellow Pigment ◽  
The Body ◽  
Red Pigment ◽  
Orange Pigment ◽  
Black Smoke ◽  
Goldfish Carassius Auratus ◽  
Orange Yellow ◽  
Yellow Pigments ◽  
First Time

The colours of nacreous (mottled) fish are usually mottled but specimens do occur in which only one kind of the black, orange, or yellow chromatophores is present, while some lack pigments over most of the body. The colours appear metallic, pearl, or matt depending on the presence or absence of reflecting tissue in two definite layers. The hues seen in these fish are black, smoke, blue, orange, yellow, blood-red, and silver, which occur singly or in combinations. These hues are produced by black, orange, and yellow pigments in chromatophores, silver reflectillg tissue, and haemoglobin in the blood. The presence of a yellow pigment — a carotenoid — is reported for the first time. Although the colour red has been reported no red pigment has ever been described. An intense orange pigment will produce a red effect on a pale blood-red background. The nacreous (mottled) group of the goldfish is intermediate between the metallic (scaled) and matt (transparent) groups with regard to the amount of reflecting tissue. The colours of these fish may not be used as criteria of the groups.

Acoustic Stimulation of the Ear of the Goldfish (Carassius Auratus)

1974 ◽  
Vol 61 (1) ◽  
pp. 243-260 ◽  
Author(s):  
RICHARD R. FAY ◽  
ARTHUR N. POPPER
Keyword(s):  
Carassius Auratus ◽  
Sound Pressure ◽  
Acoustic Stimulation ◽  
Pressure Sensitivity ◽  
Particle Displacement ◽  
Swim Bladder ◽  
Goldfish Carassius Auratus ◽  
Peripheral Auditory System ◽  
Direct Vibration ◽  
Stimulation Of

Microphonic potentials were recorded from the ears of the goldfish during acoustic stimulation in a situation where sound pressure and particle displacement could be varied. Microphonic potentials from fishes with the swim bladder intact were proportional to sound pressure. After removal of the swim bladder, sound pressure sensitivity declined by 20-35 dB and the response was generated in proportion to particle displacement. The ear's sensitivity to direct vibration of the head increases at between -3 and -6 dB/octave between 70 and 1500 Hz and is not affected by the removal of the swim bladder. It is concluded that the peripheral auditory system of the goldfish may function as a pressure detector or as a displacement detector, depending upon the impedance of the applied signal.

scholarly journals Description of the Case of a Swim Bladder Torsion in Goldfish (Carassius auratus, Linnaeus 1758)

2020 ◽  
Vol 8 (4) ◽  
Author(s):  
Andreia Garcês ◽  
Luís Sousa ◽  
Roberto Sargo ◽  
Filipe Silva ◽  
Isabel Pires
Keyword(s):  
Carassius Auratus ◽  
Swim Bladder ◽  
Goldfish Carassius Auratus

Studies of the Metabolism of Asialotransferrins: the Metabolic Heterogeneity of Human Asialotransferrin

1975 ◽  
Vol 53 (10) ◽  
pp. 1070-1077 ◽  
Author(s):  
E. Regoeczi ◽  
K.-L. Wong ◽  
M. W. C. Hatton
Keyword(s):  
Half Life ◽  
Guinea Pigs ◽  
The Body ◽  
Mass Action ◽  
Human Transferrin ◽  
Denatured Protein ◽  
Body Activity ◽  
Constant Rate ◽  
Total Body ◽  
Metabolic Heterogeneity

Catabolism of human transferrin and human asialotransferrin was simultaneously studied in guinea pigs by means of total body radioactivity measurements. Total body activity representing transferrin decreased at a constant rate with an average half-life of 88 h. Decrease of the total body activity representing asialotransferrin exhibited at least two rates; the half-life of the fast initial component averaged at 25 h, whereas the half-life of the slower component averaged at 55 h. Transition occurred between the 50th and 80th hours of the experiments.The complex character of the elimination curves could not be explained by differences in the iron content of asialotransferrin, by the presence of transferrin variants or of denatured protein in the injected material, by residual sialic acid in the preparations, by accumulation of radioactive terminal catabolic products in the body, by an association of asialotransferrin with any other macromolecular plasma constituent, by changing conditions for mass action, or by a continuing return of labeled protein from the extravascular space. Injection of bovine asialotransferrin into guinea pigs did not result in complex total body curves. Analyses of guinea pig tissues demonstrated that human asialotransferrin had marked affinity for the liver and none for the kidney, lung, or spleen.These observations are consistent with the hypothesis that the glycopeptides in human transferrin are hetegrogeneous in that removal of the sialyl residues exposes structures with different affinities for the hepatic asialoglycoprotein receptor. The precise chemical basis for the metabolic heterogeneity is unknown.

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