Seasonal changes in mitochondrial bioenergetics and physiological performance of the bluegill sunfish, Lepomis macrochirus, from a shallow, Midwest river

Field experiments were conducted over the summer of 1983 to determine food-evacuation rate and measure stomach fullness of bluegill sunfish (Lepomis macrochirus). A combination of these data gave estimates of daily food intake of fish. Fish were captured and held in large holding pens in Lake Opinicon, Ontario, Canada, and periodically subsampled over 24 h to monitor changes in mean weight of stomach contents. Stomach-evacuation rates obtained in this way increased significantly with water temperature over the range 10–25 °C. However, variation in stomach-evacuation rate was considerable, reducing the utility of water temperature as a predictor of stomach-evacuation rate. It is suggested that the simple field methods employed here to estimate stomach evacuation and food intake are more useful in the estimation of daily ration than the more commonly employed laboratory-based methods.

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Locomotor hyperactivity induced in the bluegill sunfish, Lepomis macrochirus, by sublethal concentrations of DDT

Canadian Journal of Zoology ◽

10.1139/z77-139 ◽

1977 ◽

Vol 55 (7) ◽

pp. 1077-1081 ◽

Cited By ~ 21

Author(s):

Erik G. Ellgaard ◽

J. Coller Ochsner ◽

J. Keith Cox

Keyword(s):

Locomotor Activity ◽

Tap Water ◽

Lepomis Macrochirus ◽

Quantitative Description ◽

Control Fish ◽

Bluegill Sunfish ◽

Locomotor Hyperactivity ◽

Sublethal Concentrations

A quantitative description of the effects of sublethal concentrations of DDT on the locomotor activity of the bluegill sunfish, Lepomis macrochirus, is presented. DDT-elicited hyperactive locomotor responses at all the concentrations examined (0.008, 0.01, 0.02, 0.04, 0.06, 0.08, 0.1, and 0.2 parts per billion (ppb)) and the degree of such responses were concentration dependent. Maximal effects at each concentration were observed within 8 days after addition of DDT to the environment. At their maxima, fish at 0.008 ppb were 1.3 times as active as control fish, whereas fish at 0.2 ppb were 3.0 times as active as controls. The effects of DDT on locomotor activity were not reversed even after the fish were transferred back into tap water for 2 weeks.

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Nitrogen Excretion and Protein Consumption of the Bluegill Sunfish (Lepomis macrochirus)

Journal of the Fisheries Research Board of Canada ◽

10.1139/f71-059 ◽

1971 ◽

Vol 28 (3) ◽

pp. 449-451 ◽

Cited By ~ 37

Author(s):

J. Savitz

Keyword(s):

Mathematical Description ◽

Lepomis Macrochirus ◽

Specific Dynamic Action ◽

Nitrogen Excretion ◽

Bluegill Sunfish ◽

Protein Consumption ◽

Dynamic Action ◽

Excretion Rates

Nitrogen excretion rates increase with an increase in protein consumption levels. A mathematical description of this relation was formulated from the data. Estimates of the effect of specific dynamic action on nitrogen excretion were also calculated.

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CHARACTERIZATION OF MITOCHONDRIAL DNA VARIABILITY IN A HYBRID SWARM BETWEEN SUBSPECIES OF BLUEGILL SUNFISH (LEPOMIS MACROCHIRUS )

Evolution ◽

10.1111/j.1558-5646.1984.tb00364.x ◽

1984 ◽

Vol 38 (5) ◽

pp. 931-941 ◽

Cited By ~ 2

Author(s):

John C. Avise ◽

Eldredge Bermingham ◽

Louis G. Kessler ◽

Nancy C. Saunders

Keyword(s):

Mitochondrial Dna ◽

Lepomis Macrochirus ◽

Bluegill Sunfish ◽

Hybrid Swarm ◽

Mitochondrial Dna Variability

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Metabolic phenotype is not associated with vulnerability to angling in bluegill sunfish (Lepomis macrochirus)

Canadian Journal of Zoology ◽

10.1139/cjz-2017-0363 ◽

2018 ◽

Vol 96 (11) ◽

pp. 1264-1271 ◽

Cited By ~ 4

Author(s):

Michael J. Louison ◽

J.A. Stein ◽

C.D. Suski

Keyword(s):

Oxygen Consumption ◽

Metabolic Rate ◽

Recovery Time ◽

Lepomis Macrochirus ◽

Metabolic Phenotype ◽

Intermittent Flow ◽

Bluegill Sunfish ◽

Metabolic Rates ◽

Prior Work ◽

Context Specific

Prior work has described a link between an individual’s metabolic rate and a willingness to take risks. One context in which high metabolic rates and risk-prone behaviors may prove to be maladaptive is in fish that strike fishing lures only to be captured by anglers. It has been shown that metabolic phenotype may be altered by angling; however, little work has assessed metabolic rate in fish and its relationship to angling vulnerability in a realistic angling trial. To address this, we subjected a set of bluegill sunfish (Lepomis macrochirus Rafinesque, 1819) to a series of angling sessions. Following this, a subset of 23 fish that had been captured at least once and 25 fish that had not been captured were assessed for metabolic phenotype (standard and maximum metabolic rates, postexercise oxygen consumption, and recovery time) via intermittent flow respirometry. Contrary to predictions, captured and uncaptured fish did not differ in any measurement of metabolic rate. These results suggest that metabolic phenotype is not a determinant of angling vulnerability within the studied context. It is possible, therefore, that previously described alterations in metabolic phenotype owing to angling pressure may be context-specific and may not apply to all species and angling contexts.

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