scholarly journals Exceptional CO2 Tolerance in White Sturgeon (Acipenser transmontanus) Is Associated with Protection of Maximum Cardiac Performance during Hypercapnia In Situ

2011 ◽  
Vol 84 (3) ◽  
pp. 239-248 ◽  
Author(s):  
Daniel W. Baker ◽  
Linda M. Hanson ◽  
Anthony P. Farrell ◽  
Colin J. Brauner
Keyword(s):  
Cardiac Performance ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Co2 Tolerance

The photoreceptors and visual pigments in the retina of the white sturgeon, Acipenser transmontanus

1990 ◽  
Vol 68 (7) ◽  
pp. 1544-1551 ◽  
Author(s):  
A. J. Sillman ◽  
M. D. Spanfelner ◽  
E. R. Loew
Keyword(s):  
Vitamin A ◽  
Visual Pigment ◽  
Visual Pigments ◽  
Spectrophotometric Analysis ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Light Regimen ◽  
Cone Pigment ◽  
Spectral Absorbance

The photoreceptors in the retina of the white sturgeon, Acipenser transmontanus (Chondrostei), were studied by means of scanning electron microscopy, in situ microspectrophotometry, and spectrophotometric analysis of visual pigment extracts. The white sturgeon retina is simple in that it contains only two morphologically distinct photoreceptors. The retina is dominated by rods with large outer segments, but there is a substantial population (40%) of single cones. Evidence was found for only one rod visual pigment and one cone visual pigment. Peak spectral absorbance (λmax) of the rod pigment is near 539 nm, whereas λmax of the cone pigment is near 605 nm. Both visual pigments are porphyropsin types with chromophores based on vitamin A2. No detectable rhodopsin based on vitamin A1 is ever present, regardless of season or light regimen. The results are discussed in terms of the sturgeon's behavior, as well as the implications for the evolution of color vision.

The visual pigments of wild white sturgeon (Acipenser transmontanus)

1995 ◽  
Vol 73 (4) ◽  
pp. 805-809 ◽  
Author(s):  
A. J. Sillman ◽  
M. E. Sorsky ◽  
E. R. Loew
Keyword(s):  
Vitamin A ◽  
Fresh Water ◽  
Visual Pigment ◽  
Visual Pigments ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Estuarine Water ◽  
Cone Pigments ◽  
Partial Bleaching

The visual pigments of the anadromous white sturgeon (Acipenser transmontanus) taken from relatively saline estuarine water were characterized by means of in situ microspectrophotometry and partial bleaching analysis of a digitonin extract. The three cone pigments (λmax = 605, 539, and ca. 460 nm) and one rod pigment (λmax = 541 nm) of the wild sturgeon are the same as those of cultured sturgeon that spend their entire lives in fresh water. All the visual pigments incorporate a chromophore based on vitamin A2. Unlike other anadromous fishes during the "saline phase," the white sturgeon shows no evidence of the presence of any vitamin A1 based visual pigment in the retina.

Co-infection of Acipenserid herpesvirus 2 (AciHV-2) and Streptococcus iniae in cultured white sturgeon Acipenser transmontanus

2017 ◽  
Vol 124 (1) ◽  
pp. 11-20 ◽  
Author(s):  
E Soto ◽  
C Richey ◽  
B Stevens ◽  
S Yun ◽  
K Kenelty ◽  
...  
Keyword(s):  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Streptococcus Iniae

Acute Toxicity Testing with Juvenile White Sturgeon (Acipenser transmontanus)

1998 ◽  
Vol 33 (1) ◽  
pp. 95-110 ◽  
Author(s):  
W.R. Bennett ◽  
A.P. Farrell
Keyword(s):  
Acute Toxicity ◽  
Swimming Performance ◽  
Juvenile Fish ◽  
Toxicity Testing ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Toxicity Tests ◽  
Fraser River ◽  
Acute Toxicity Tests ◽  
Acute Toxicity Testing

Abstract The primary goal of this study was to investigate the possibility of using early life stages of white sturgeon (Acipenser transmontanus) (eggs, larvae and fry) as a species relevant to the Fraser River, B.C., for the acute and sublethal toxico-logical testing of forest industry effluents. Here we report the first successful acute toxicity tests for 8-day-old larvae and 42-day-old fry exposed to several chemicals known to be released into the Fraser River (i.e., 6 monochlorovanillin [6 MVAN], 4,5 dichloroguaiacol [4,5 DCG], 4,5 dichlorocatechol [4,5 DCAT], pentachlorophenol [PCP], and didecyldimethylammonium chloride [DDAC]). In most cases, white sturgeon fry were at the lower end of the range for acute toxicity values for chlorinated phenolic compounds, when compared with other juvenile fish species, and they were extremely sensitive to DDAC. The larval stage was usually more sensitive than the fry stage. Acute toxicity tests with fertilized eggs were unsuccessful. A postexposure growth study was inconclusive because neither control nor toxicant-exposed larvae and fry withstood the additional handling used for measuring body mass. At 62-days-old, fry were more tolerant of handling. This allowed measurement of their swimming performance. Although we have concerns about the reliability of using larvae for acute toxicity testing at this time, 60-day-old white sturgeon fry would appear to be both a sensitive and relevant species for assessing environmental impacts relevant to the Fraser River.

scholarly journals A comparison of methods for determining ploidy in white sturgeon (Acipenser transmontanus)

Aquaculture ◽  
2019 ◽  
Vol 507 ◽  
pp. 435-442 ◽  
Author(s):  
Julia A. Fiske ◽  
Joel P. Van Eenennaam ◽  
Anne E. Todgham ◽  
Shawn P. Young ◽  
Cara E. Holem-Bell ◽  
...  
Keyword(s):  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Comparison Of Methods

Limitations of carrageenan microbound diets for feeding white sturgeon, Acipenser transmontanus, larvae

Aquaculture ◽  
1996 ◽  
Vol 141 (3-4) ◽  
pp. 245-265 ◽  
Author(s):  
Anna Gawlicka ◽  
Line McLaughlin ◽  
Silas S.O. Hung ◽  
Joël de la Noüe
Keyword(s):  
White Sturgeon ◽  
Acipenser Transmontanus
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