Persistently warmer temperatures lead to life history changes in bluegill sunfish (Lepomis macrochirus)

2020 ◽  
Vol 103 (10) ◽  
pp. 1165-1177
Author(s):  
Dalon P. White ◽  
Robert E. Colombo ◽  
David H. Wahl
Keyword(s):  
Life History ◽  
Lepomis Macrochirus ◽  
Bluegill Sunfish

scholarly journals Capture technique and fish personality: angling targets timid bluegill sunfish, Lepomis macrochirus

2011 ◽  
Vol 68 (5) ◽  
pp. 749-757 ◽  
Author(s):  
Alexander D.M. Wilson ◽  
Thomas R. Binder ◽  
Keegan P. McGrath ◽  
Steven J. Cooke ◽  
Jean-Guy J. Godin
Keyword(s):  
Life History ◽  
Individual Differences ◽  
Life History Traits ◽  
Lepomis Macrochirus ◽  
Open Water ◽  
Wild Fish ◽  
Bluegill Sunfish ◽  
In The Wild ◽  
The Relationship ◽  
Capture Technique

Size-selective harvesting associated with commercial and recreational fishing practices has been shown to alter life history traits through a phenomenon known as fishing-induced evolution. This phenomenon may be a result of selection pathways targeting life-history traits directly or indirectly through correlations with behavioral traits. Here, we report on the relationship between individual differences in behavior and capture technique (beach seining versus angling) in wild-caught juvenile bluegill sunfish ( Lepomis macrochirus ). Both fish caught by using a seine net (seined) and fish caught by using a lure (angled) were individually tested under standardized laboratory conditions for their boldness, water-column use, and general activity. Observed inter-individual differences in boldness were strongly correlated with method of capture in the wild. Fish caught by angling were more timid and had fewer ectoparasites than fish caught using a seine net. However, this relationship did not carry over to an experiment in a large outdoor pool with seine-caught, individually tagged wild fish, where bolder individuals were more likely to be angled in open water away from refuges than more timid individuals, based on their previously assessed boldness scores. Our study is both novel and important, as it describes the relationship between capture technique and boldness in a natural population and underscores the potential risk of sampling biases associated with method of animal capture for behavioral, population, and conservation biologists.

scholarly journals Boldness and behavioral syndromes in the bluegill sunfish, Lepomis macrochirus

2009 ◽  
Vol 20 (2) ◽  
pp. 231-237 ◽  
Author(s):  
Alexander D.M. Wilson ◽  
Jean-Guy J. Godin
Keyword(s):  
Lepomis Macrochirus ◽  
Behavioral Syndromes ◽  
Bluegill Sunfish

Effect of water temperature on stomach evacuation rates, and estimation of daily food intake of bluegill sunfish (Lepomis macrochirus Rafinesque)

1990 ◽  
Vol 68 (3) ◽  
pp. 591-595 ◽  
Author(s):  
D. J. Booth
Keyword(s):  
Food Intake ◽  
Water Temperature ◽  
Field Experiments ◽  
Lepomis Macrochirus ◽  
Stomach Contents ◽  
Bluegill Sunfish ◽  
Field Methods ◽  
Daily Food Intake ◽  
Evacuation Rate ◽  
Daily Food

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.

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

1977 ◽  
Vol 55 (7) ◽  
pp. 1077-1081 ◽  
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.

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

1971 ◽  
Vol 28 (3) ◽  
pp. 449-451 ◽  
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.

Sign in / Sign up

Export Citation Format

Share Document