scholarly journals Gastric Evacuation Rates of Spiny Dogfish, Goosefish, and Summer Flounder: Implications for Multispecies Models

2021 ◽  
Vol 13 (5) ◽  
pp. 507-519
Author(s):  
Linda L. Stehlik ◽  
John Rosendale ◽  
Beth A. Phelan ◽  
Jonathan A. Hare
Keyword(s):  
Spiny Dogfish ◽  
Gastric Evacuation ◽  
Summer Flounder

Biology and Management of Dogfish Sharks

2009 ◽  
Keyword(s):  
Regression Analysis ◽  
Gastric Lavage ◽  
Stomach Contents ◽  
Exponential Model ◽  
Spiny Dogfish ◽  
Square Root ◽  
Gastric Evacuation ◽  
San Juan Islands ◽  
Gastric Evacuation Rate ◽  
Over Time

Abstract.—Gastric evacuation rate was estimated for immature spiny dogfish <em>Squalus acanthias </em>from the San Juan Islands, Washington. Dogfish were fed known quantities of herring and removed at intervals after feeding to recover the remaining portion of the meal. Stomach contents were recovered using the non-lethal technique, gastric lavage. Regression analysis was used to evaluate the adequacy of linear, square root, and exponential models in describing the decrease in stomach contents over time. An exponential model proved best at describing the pattern of evacuation. Gastric evacuation in immature dogfish was comparable to that of other elasmobranchs of similar size at similar temperatures. Re-using test subjects did not significantly impact gastric evacuation estimates.

Effect of starvation on gastric evacuation and associated mathematical models in juvenile southern catfish (Silurus meridionalis)

2012 ◽  
Vol 36 (8) ◽  
pp. 1263 ◽  
Author(s):  
Ling-qing ZENG ◽  
Feng-jie LI ◽  
Xiu-ming LI ◽  
FU Jia-qing HUANG ◽  
Shi-jian FU ◽  
...  
Keyword(s):  
Mathematical Models ◽  
Gastric Evacuation ◽  
Silurus Meridionalis

Digestive Response of Rainbow Trout, Salmo gairdneri, to Pellet Diets

1969 ◽  
Vol 26 (7) ◽  
pp. 1801-1812 ◽  
Author(s):  
John T. Windell ◽  
David O. Norris ◽  
James F. Kitchell ◽  
James S. Norris
Keyword(s):  
Body Weight ◽  
Rainbow Trout ◽  
Dry Matter ◽  
Laboratory Experiments ◽  
Corn Oil ◽  
Saturated Fat ◽  
Methyl Cellulose ◽  
Salmo Gairdneri ◽  
Gastric Evacuation ◽  
Gastric Contents

Quantitative data are presented for three laboratory experiments concerning rate of gastric evacuation of pellets (fed in gelatin capsules) and pellet components. Rainbow trout, Salmo gairdneri, acclimated to a constant water temperature of 15 C were killed 12 hr after consuming an experimental meal. Subtraction of amount of dry matter remaining at autopsy from dry matter consumed yielded amount of food digested or evacuated or both, from the stomach per unit time.Meals of encapsulated pellet were evacuated from the stomach more rapidly (65.8% decrease in 12 hr) than encapsulated corn oil (42.6%), gelatin (50.8%), a combination of corn oil and gelatin (47.3%), saturated fat (28.8%), or methyl cellulose (50.3%).Groups of fish consuming five capsules equal to approximately 0.65 % of their body weight evacuated 35.9, 45.1, 64.2, 95.5, and 100% at intervals after killing from 6 to 36 hr, respectively. Similar groups consuming seven capsules equal to approximately 1.0% of their body weight evacuated 23.7, 57.9, 70.5, and 86.6% at intervals after killing from 4 to 20 hr, respectively.Ten groups of trout consuming amounts of dry matter equal to 0.24, 0.40, 0.74, 1.11, 1.31, 1.19, 1.59, 1.56, 1.91, and 2.26% of their body weight evacuated 90.7, 81.3, 64.2, 57.9, 56.6, 52.5, 53.4, 51.3, 58.7, and 50.0% in 12 hr, respectively. Gastric motility remains relatively constant once food has entered the stomach. However, when larger meals are fed a greater quantity is evacuated per unit time. This could only be accomplished by changes in volume of gastric contents pumped per peristaltic stroke or number of strokes per unit time.

Sexual Segregation of Spiny Dogfish in Fishery-Dependent Surveys in Cape Cod, Massachusetts: Potential Management Benefits

2014 ◽  
Vol 143 (4) ◽  
pp. 833-844 ◽  
Author(s):  
Andrea Dell’Apa ◽  
Jennifer Cudney-Burch ◽  
David G. Kimmel ◽  
Roger A. Rulifson
Keyword(s):  
Sexual Segregation ◽  
Cape Cod ◽  
Spiny Dogfish

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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