Acute toxicity of nitrofurazone to channel catfish,lctalurus punctatus, and goldfish,Carassius auratus

1987 ◽  
Vol 38 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Mitchell L. Wise ◽  
Claudio L. Stiebel ◽  
John M. Grizzle
Keyword(s):  
Acute Toxicity ◽  
Channel Catfish ◽  
Carassius Auratus ◽  
Goldfish Carassius Auratus

A Comparative Study of Purines Responsible for Silvering in Several Freshwater Fishes

1969 ◽  
Vol 26 (7) ◽  
pp. 1927-1931 ◽  
Author(s):  
J. G. Eales
Keyword(s):  
Channel Catfish ◽  
Brook Trout ◽  
Carassius Auratus ◽  
Salvelinus Fontinalis ◽  
Freshwater Fishes ◽  
Fish Skin ◽  
Culaea Inconstans ◽  
Goldfish Carassius Auratus ◽  
Diverse Species ◽  
Brook Stickleback

The major purines occurring in silvery depositions were analysed for several taxonomically diverse species of freshwater fishes by paper chromatography and ultraviolet-spectrophotometry.Guanine and lesser quantities of hypoxanthine were the only purines found in the skin silvery layers of the channel catfish (Ictalurus punclatus), burbot (Lota lota), brook stickleback (Culaea inconstans), pike (Esox lucius), walleye (Stizostedion vitreum), sauger (S. canadense), goldfish (Carassius auratus), brook trout (Salvelinus fontinalis), and trout perch (Percopsis omiscomaycus). Possibly both guanine and hypoxanthine generally occur in fish skin silvery layers.In the pike and walleye the purines in the homogenized eye were examined and guanine and hypoxanthine recovered. However, for the swimbladder of pike, walleye, and channel catfish guanine alone was found.

Acute toxicity of pentachlorophenol (PCP) on goldfish(Carassius auratus)under laboratory conditions

1991 ◽  
Vol 31 (1) ◽  
pp. 395-400
Author(s):  
A. Fernández‐Casalderrey ◽  
E.S. Andreu‐Moliner ◽  
C. Cebrián ◽  
M.D. Ferrando ◽  
M. Gamón
Keyword(s):  
Acute Toxicity ◽  
Carassius Auratus ◽  
Laboratory Conditions ◽  
Goldfish Carassius Auratus

Acute Toxicity of Sodium Chloride, Pentachlorophenol, Guthion®, and Hexavalent Chromium to Fathead Minnows (Pimephales promelas) and Goldfish (Carassius auratus)

1976 ◽  
Vol 33 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Ira R. Adelman ◽  
Lloyd L. Smith Jr. ◽  
Gary D. Siesennop
Keyword(s):  
Sodium Chloride ◽  
Acute Toxicity ◽  
Hexavalent Chromium ◽  
Carassius Auratus ◽  
Pimephales Promelas ◽  
Fathead Minnows ◽  
Goldfish Carassius Auratus ◽  
Significant Difference

The 96-h LC50’s for sodium chloride were 7650 and 7341 mg/liter, for pentachlorophenol 0.21 and 0.22 mg/liter, for Guthion® 1.9 and 2.4 mg/liter, and for hexavalent chromium 48 and 120 mg/liter, for fathead minnows (Pimephales promelas) and goldfish (Carassius auratus), respectively. Threshold LC50’s were reached in 6 days for sodium chloride (7650 and 7322 mg/liter for fathead minnows and goldfish, respectively), and pentachlorophenol (0.21 and 0.21 mg/liter), but were not attained in 11 days (termination of testing) with Guthion® (0.76 and 0.80 mg/liter) and hexavalent chromium (18 and 33 mg/liter). With pentachlorophenol and Guthion® goldfish were initially more resistant, but by termination there was no significant difference in LC50’s between the two species. With hexavalent chromium the goldfish were more resistant throughout the 11-day test, and with sodium chloride goldfish were initially more resistant but at attainment of a threshold LC50 were less resistant. Use of toxicity curves for assessment of acute mortality permits interpretation not possible in 96-h tests where LC50’s are computed at 24-h intervals.

Studies on Chilodonella cyprini and C. hexasticha (Protozoa, Ciliata) by scanning electron microscopy

1985 ◽  
Vol 63 (10) ◽  
pp. 2483-2487 ◽  
Author(s):  
M. Wiles ◽  
D. K. Cone ◽  
P. H. Odense
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Nova Scotia ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Carassius Auratus ◽  
General Morphology ◽  
Goldfish Carassius Auratus ◽  
Scanning Electron

Specimens of the kinetophragminophorid ciliates Chilodonella cyprini (Moroff, 1902) from goldfish (Carassius auratus) in Nova Scotia and Chilodonella hexasticha (Kiernik, 1909) from channel catfish (Ictalurus punctatus) in Arkansas were examined by scanning electron microscopy. They are round to foliate, ventrally flattened protozoa well suited for adherence to, and movement over, a flat host surface. Organelles including ventral ciliary rows, dorsal cilia, excretory pores, and a prominent cytopharynx are described. Dorsal surfaces of both species have a distinct reticulate pattern which represents a modification of the pellicle. Ventrolateral margins of C. cyprini contain rows of short cuticular proturberances not seen in C. hexasticha. Our specimens of the two species were distinguished by their total ventral ciliary row number (12–14 in C. hexasticha, 21 in C. cyprini). General morphology as revealed by scanning electron microscopy is compared with previous light microscopical observations. The taxonomic separation of the two species, C. cyprini and C. hexasticha, is confirmed.

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