scholarly journals Regulation of branchial V-H+-ATPase, Na+/K+-ATPase and NHE2 in response to acid and base infusions in the Pacific spiny dogfish (Squalus acanthias)

2005 ◽  
Vol 208 (2) ◽  
pp. 345-354 ◽  
Author(s):  
M. Tresguerres
Keyword(s):  
Squalus Acanthias ◽  
Spiny Dogfish ◽  
The Pacific ◽  
Acid And Base

Impacts of low salinity exposure and antibiotic application on gut transport activity in the Pacific spiny dogfish, Squalus acanthias suckleyi

2020 ◽  
Vol 190 (5) ◽  
pp. 535-545 ◽  
Author(s):  
Alyssa M. Weinrauch ◽  
Erik J. Folkerts ◽  
Tamzin A. Blewett ◽  
Carol Bucking ◽  
W. Gary Anderson
Keyword(s):  
Squalus Acanthias ◽  
Spiny Dogfish ◽  
Transport Activity ◽  
Low Salinity ◽  
The Pacific

Exercise and recovery metabolism in the pacific spiny dogfish ( Squalus acanthias )

2003 ◽  
Vol 173 (6) ◽  
pp. 463-474 ◽  
Author(s):  
J. G. Richards ◽  
G. J. F. Heigenhauser ◽  
C. M. Wood
Keyword(s):  
Squalus Acanthias ◽  
Spiny Dogfish ◽  
The Pacific

Biology and Management of Dogfish Sharks

2009 ◽  
Keyword(s):  
East China Sea ◽  
Pacific Coast ◽  
Japan Sea ◽  
Squalus Acanthias ◽  
Small Scale ◽  
Spiny Dogfish ◽  
Western Coast ◽  
The Pacific ◽  
The Japan Sea ◽  
Hokkaido Island

Abstract.—Around Japan, spiny dogfish <em>Squalus acanthias </em>occur off the Pacific coast of Hokkaido Island and northern Honshu and off the western coast of Japan from the East China Sea to the Japan Sea. They have been caught and used historically on both coasts. This species is usually caught as bycatch except in some small-scale local fisheries which directly target it.

Extracellular carbonic anhydrase and an acid-base disequilibrium in the blood of the dogfish Squalus acanthias

1997 ◽  
Vol 200 (1) ◽  
pp. 173-183 ◽  
Author(s):  
K Gilmour ◽  
R Henry ◽  
C Wood ◽  
S Perry
Keyword(s):  
Carbonic Anhydrase ◽  
Squalus Acanthias ◽  
Co2 Production ◽  
Spiny Dogfish ◽  
Hypoxic Conditions ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Arterial Blood ◽  
The Pacific ◽  
Membrane Bound

The electrometric [Delta]pH method and an in vitro radioisotopic HCO3- dehydration assay were used to demonstrate the presence of true extracellular carbonic anhydrase (CA) activity in the blood of the Pacific spiny dogfish Squalus acanthias. An extracorporeal circulation and stopflow technique were then used to characterise the acid&shy;base disequilibrium in the arterial (postbranchial) blood. During the stopflow period, arterial pH (pHa) decreased by 0.028&plusmn;0.003 units (mean &plusmn; s.e.m., N=27), in contrast to the increase in pHa of 0.029&plusmn;0.006 units (mean &plusmn; s.e.m., N=6) observed in seawater-acclimated rainbow trout Oncorhynchus mykiss under similar conditions. The negative disequilibrium in dogfish blood was abolished by the addition of bovine CA to the circulation, while inhibition by benzolamide of extracellular and gill membrane-bound CA activities reversed the direction of the acid&shy;base disequilibrium such that pHa increased by 0.059&plusmn;0.016 units (mean &plusmn; s.e.m., N=6) during the stopflow period. When the CA activity of red blood cells (rbcs) was additionally inhibited using acetazolamide, the magnitude of the negative disequilibrium was increased significantly to -0.045&plusmn;0.007 units (mean &plusmn; s.e.m., N=6). Blockage of the rbc Cl-/HCO3- exchanger using 4,4'-diisothiocyanostilbene-2,2'-disulphonic acid (DIDS) also increased the magnitude of the negative disequilibrium, in this case to -0.089&plusmn;0.008 units (mean &plusmn; s.e.m., N=6). Exposure of dogfish to hypercapnia had no effect on the disequilibrium, whereas the disequilibrium was significantly larger under hypoxic conditions, at -0.049&plusmn;0.008 units (mean &plusmn; s.e.m., N=6). The results are interpreted within a framework in which the absence of a positive CO2 excretion disequilibrium in the arterial blood of the spiny dogfish is attributed to the membrane-bound and extracellular CA activities. The negative disequilibrium may arise from the continuation of Cl-/HCO3- exchange in the postbranchial blood and/or the hydration of CO2 added to the plasma postbranchially. Two possible sources of this CO2 are discussed; rbc CO2 production or the admixture of blood having 'low' and 'high' CO2 tensions, i.e. the mixing of postbranchial blood with blood which has bypassed the respiratory exchange surface.

Metabolic Rate and Energy Expenditure of the Spiny Dogfish, Squalus acanthias

1978 ◽  
Vol 35 (6) ◽  
pp. 816-821 ◽  
Author(s):  
J. R. Brett ◽  
J. M. Blackburn
Keyword(s):  
Energy Expenditure ◽  
Metabolic Rate ◽  
Key Words ◽  
Swimming Performance ◽  
Squalus Acanthias ◽  
Spiny Dogfish ◽  
Metabolic Rates ◽  
Performance Curve ◽  
Power Performance ◽  
General Energy

The metabolic rate of spiny dogfish, Squalus acanthias, was determined in both a tunnel respirometer and a large, covered, circular tank (mass respirometer). Swimming performance was very poor in the respirometer, so that a power–performance curve could not be established. Instead, resting metabolic rates were determined, with higher rates induced by causing heavy thrashing (active metabolism). Routine metabolic rates were measured for the spontaneous activity characterizing behavior in the circular tank. For fish of 2 kg mean weight, the metabolic rates at 10 °C were 32.4 ± 2.6 SE (resting), 49.2 ± 5.0 SE (routine), and 88.4 ± 4.6 SE (active) mg O2∙kg−1∙h−1. Assuming that the routine rate represents a general energy expenditure in nature, this is equivalent to metabolizing about 3.8 kcal∙kg−1∙d−1 (15.9 × 103 J∙kg−1∙d−1). Key words: dogfish, metabolic rates, energetics, respiration

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