UPTAKE, ELIMINATION AND TISSUE DISTRIBUTION OF DIETARY AND AQUEOUS CADMIUM BY RAINBOW TROUT (SALMO GAIRDNERI RICHARDSON) AND LAKE WHITEFISH (COREGONUS CLUPEAFORMIS MITCHILL)

1989 ◽  
Vol 8 (1) ◽  
pp. 87 ◽  
Author(s):  
S. E. Harrison ◽  
J. F. Klaverkamp
Keyword(s):  
Rainbow Trout ◽  
Tissue Distribution ◽  
Salmo Gairdneri ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish

Occurrence of the eyefluke, Diplostomum (Diplostomum) baeri bucculentum Dubois et Rausch, 1948, in salmonid fishes of northern British Columbia

1985 ◽  
Vol 63 (2) ◽  
pp. 396-399 ◽  
Author(s):  
Hilda Lei Ching
Keyword(s):  
Rainbow Trout ◽  
Chinook Salmon ◽  
Sockeye Salmon ◽  
Lake Trout ◽  
Infected Fish ◽  
Salmo Gairdneri ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Dolly Varden Salvelinus Malma ◽  
Prosopium Williamsoni

As a result of experimental infections in chicks, diplostomula found in the retina of chinook salmon from the Nechako River were identified as Diplostomum (Diplostomum) baeri bucculentum. Eyeflukes in other salmonids were considered to be the same species based on similar measurements and site in the eyes. These eyeflukes varied in prevalence and mean intensity in seven salmonid species surveyed in nine localities in 1979–1981. The following fish were sampled: rainbow trout (Salmo gairdneri), 505; mountain whitefish (Prosopium williamsoni), 334; lake whitefish (Coregonus clupeaformis), 32; Dolly Varden (Salvelinus malma), 66; lake trout (S. namaycush), 13; kokanee or sockeye salmon (Oncorhynchus nerka), 323; and chinook salmon (O. tshawytscha), 164. Eyeflukes had prevalences ranging from 84 to 100% in six lakes, 64% in the river, 53% in one reservoir site, and a prevalence of 15% in the other reservoir site. Mountain and lake whitefishes had high mean intensities while kokanee had low mean intensities. Correlation of increased intensity with increased fish size was significant for 6 of 27 samples. Four samples of lake whitefish, mountain whitefish, rainbow trout, and chinook salmon showed significant asymmetry when numbers of diplostomula were compared between eyes. More of the heavily infected fish showed asymmetry than did the lightly infected fish.

Migration and development of swim-bladder nematodes, Cystidicola spp. (Habronematoidea), in their definitive hosts

1980 ◽  
Vol 58 (11) ◽  
pp. 1997-2005 ◽  
Author(s):  
Geoff A. Black ◽  
Murray W. Lankester
Keyword(s):  
Rainbow Trout ◽  
Lake Trout ◽  
Distinct Species ◽  
Salmo Gairdneri ◽  
Swim Bladder ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Northwestern Ontario ◽  
Third Stage ◽  
Migration And Development

Third-stage larvae of Cystidicola cristivomeri White, 1941, and C. farionis Fischer, 1798, migrated directly via the pneumatic duct to the swim bladder of lake trout, Salvelinus namaycush, and rainbow trout, Salmo gairdneri, respectively. Larvae reached the swim bladder as early as 16 h after fish were infected using a stomach tube. At 4–10 °C, mature male and female C. cristivomeri and C. farionis were first recovered 67 and 210 days, and 112 and 235 days, respectively, after infection. Cystidicola cristivomeri is probably long-lived; there was no evidence that any died in lake trout infected for up to 600 days.Large numbers of third-stage cystidicolid larvae accumulated without maturing in the swim bladder of naturally infected lake whitefish, Coregonus clupeaformis, from Lake Nipigon, northwestern Ontario. When given to rainbow trout, these larvae matured and the adult nematodes were identical to C. farionis. These results suggest that the swim-bladder nematode that matures in lake whitefish is a distinct species.

Acute toxicity, uptake, depuration and tissue distribution of tri-n-butyltin in rainbow trout, Salmo gairdneri

1989 ◽  
Vol 15 (1) ◽  
pp. 37-51 ◽  
Author(s):  
Richard C. Martin ◽  
D. George Dixon ◽  
R. James Maguire ◽  
Peter V. Hodson ◽  
Richard J. Tkacz
Keyword(s):  
Rainbow Trout ◽  
Acute Toxicity ◽  
Tissue Distribution ◽  
Salmo Gairdneri

Tissue Distribution, Uptake, and Requirement for α-Tocopherol of Rainbow Trout (Salmo gairdneri) Fed Diets with a Minimal Content of Unsaturated Fatty Acids

1981 ◽  
Vol 111 (9) ◽  
pp. 1556-1567 ◽  
Author(s):  
Colin B. Cowey ◽  
John W. Adron ◽  
Michael J. Walton ◽  
John Murray ◽  
Arthur Youngson ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Rainbow Trout ◽  
Tissue Distribution ◽  
Unsaturated Fatty Acids ◽  
Salmo Gairdneri

scholarly journals The Quantitative Clearance of Bacteria from the Bloodstream of Rainbow Trout (Salmo gairdneri)

1982 ◽  
Vol 19 (6) ◽  
pp. 687-699 ◽  
Author(s):  
H. W. Ferguson ◽  
M. J. Claxton ◽  
R. D. Moccia ◽  
E. J. Wilkie
Keyword(s):  
Rainbow Trout ◽  
Tissue Distribution ◽  
Salmo Gairdneri ◽  
Post Inoculation ◽  
Blood Clearance ◽  
Rapid Phase ◽  
Salmonella Pullorum

The blood clearance of 51Cr-labelled heat-killed Salmonella pullorum was biphasic and exponential for each phase. This pattern was the same for all three concentrations of bacteria used. The initial more rapid phase lasted for approximately 15 minutes when roughly 90% of the bacteria had been cleared. The second slower phase started 25 to 30 minutes post-inoculation and lasted for approximately 25 to 30 minutes. The tissue distribution of bacteria showed that in both absolute and relative terms, the kidney was the most important organ, accounting for more than 70% uptake of the bacteria. These kinetics demonstrate that rainbow trout at 8°C are able to clear their bloodstream of Salmonella very efficiently, in a fashion very similar to mammals. It is not known, however, which of the various possible clearance mechanisms dominates each phase.

Disposition and Elimination Routes of 17α-Methyltestosterone in Rainbow Trout (Salmo gairdneri)

1989 ◽  
Vol 46 (1) ◽  
pp. 159-165 ◽  
Author(s):  
J. P. Cravedi ◽  
G. Delous ◽  
D. Rao
Keyword(s):  
Rainbow Trout ◽  
Tissue Distribution ◽  
Metabolic Pathways ◽  
Whole Body ◽  
Salmo Gairdneri ◽  
Aquarium Water ◽  
Total Excretion

The excretion routes and tissue distribution of [14C] 17α-methyltestosterone (17MT) were investigated in rainbow trout (Salmo gairdneri) after a single intragastric dose (40 μg, 126.8 kBq); about 95% of the ingested 17MT was absorbed. Total excretion 24 h after treatment accounted for 67.4% of the dose and most of this radioactivity was eliminated into the aquarium water, probably through the gills. Fecal and urinary 14C accounted for 22 and 0.5%, respectively, of the excreted radioactivity. Three days after dosing, 23% of the ingested radioactivity was stored in the whole body and part of the residue (about 20%) was bound to tissues. No detectable amounts of unchanged 17MT were found in tissues 48 h after dosing, in liver, 17MT-derived radioactivity was present primarily as glucuronide conjugates whereas in muscle, radioactivity originated essentially from free metabolites. Maximum bile 14C concentrations were from 200 to 2000 times the levels found in other tissues. This radioactivity was associated with glucuronide conjugates only. Excretion of 17MT-derived radioactivity occurred primarily as free metabolites in aquarium water and as glucuronide conjugates in feces. These results demonstrate the extent of biotransformation of 17MT in trout and suggest the occurrence of several metabolic pathways for this steroid in fish.

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