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GENETIC AND NEUROANATOMICAL MECHANISMS OF EVOLUTIONARY SLEEP LOSS IN THE MEXICAN CAVEFISH, ASTYANAX MEXICANUS
Title
GENETIC AND NEUROANATOMICAL MECHANISMS OF EVOLUTIONARY SLEEP LOSS IN THE MEXICAN CAVEFISH, ASTYANAX MEXICANUS.
Creator
Jaggard, James B., Keene, Alex, Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
Abstract/Description
Sleep is a complex behavioral state with ramifications on multiple levels of homeostasis including bodily function, neural activity, and molecular signaling. Sleep is conserved across evolution, though significant variations in sleep duration, architecture, and behavior are found across phyla. Decoding neural processing underlying behavior, including sleep, is a fundamental aim in neuroscience, and understanding how such behavior has evolved remains largely unknown. The encompassing goal of...
Show moreSleep is a complex behavioral state with ramifications on multiple levels of homeostasis including bodily function, neural activity, and molecular signaling. Sleep is conserved across evolution, though significant variations in sleep duration, architecture, and behavior are found across phyla. Decoding neural processing underlying behavior, including sleep, is a fundamental aim in neuroscience, and understanding how such behavior has evolved remains largely unknown. The encompassing goal of this dissertation is to elucidate the genetic and neuronal factors at play in the evolution of sleep loss in the blind Mexican tetra, Astyanax mexicanus. To this end, the work found within will explore peripheral sensory systems regulating distinct mechanisms of sleep loss, demonstrate how evolved changes in specific hypothalamic circuits drive sleep reductions, apply computational techniques to understand whole-brain evolution, and finally, will show how the generation of transgenic tools in a novel model system can be harnessed to assist functional experimental paradigms in relation to evolution and behavior.
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Date Issued
2020
PURL
http://purl.flvc.org/fau/fd/FA00013476
Subject Headings
Astyanax mexicanus, Astyanax mexicanus--Evolution, Sleep, Fishes--Behavior--Evolution, Fishes--Behavior--Genetic aspects
Format
Document (PDF)
Aggregations of myctophid fishes with other pelagic fauna
Title
Aggregations of myctophid fishes with other pelagic fauna.
Creator
Auster, P. J., Griswold, C. A., Youngbluth, Marsh J., Bailey, T. G.
Date Issued
1992
PURL
http://purl.flvc.org/FCLA/DT/3333202
Subject Headings
Myctophidae, Submersibles, Predator and prey, Fishes--Behavior
Format
Document (PDF)
Hypoxia-induced changes in vertical position and activity in juvenile snook, Centropomus undecimalis: its potential role in survival
Title
Hypoxia-induced changes in vertical position and activity in juvenile snook, Centropomus undecimalis: its potential role in survival.
Creator
Peterson, Mark S., Borckmeyer, Ronald E., Jr., Scheidt, Douglas M., Harbor Branch Oceanographic Institute
Date Issued
1991
PURL
http://purl.flvc.org/fau/fd/FA00007498
Subject Headings
Snook, Mangrove forests, Hypoxia (Water), Fishes--Behavior
Format
Document (PDF)
Egg production and completion of the life cycle of belted sandfish (Serranus subligarius) in captivity
Title
Egg production and completion of the life cycle of belted sandfish (Serranus subligarius) in captivity.
Creator
Tucker, John W., Jr., Woodward, Peter N., Harbor Branch Oceanographic Institute
Date Issued
1995
PURL
http://purl.flvc.org/FCLA/DT/3172860
Subject Headings
Serranidae, Fishes --Spawning, Aquarium fishes, Fishes Behavior, Fishes --Life cycles, Fishes --Eggs
Format
Document (PDF)
Drug Elicitation of the Aggressive Display in Siamese Fighting Fish, Betta splendens
Title
Drug Elicitation of the Aggressive Display in Siamese Fighting Fish, Betta splendens.
Creator
Smith, Elaine A., Singer, Jav J., Florida Atlantic University
Abstract/Description
Experiment I tests the hypothesis that sympathomimetic amines serve to facilitate or trigger the aggressive display of the Siamese fighting fish. Three drugs were used to test this theory: amphetamine, norepinephrine and Dibenzyline. Amphetamine was administered to a group of six females while norepinephrine and Dibenzyline were given to males. Fish were all maintained in the laboratory for one week before any testing began. Each of the three parts of Experiment I was conducted in the same...
Show moreExperiment I tests the hypothesis that sympathomimetic amines serve to facilitate or trigger the aggressive display of the Siamese fighting fish. Three drugs were used to test this theory: amphetamine, norepinephrine and Dibenzyline. Amphetamine was administered to a group of six females while norepinephrine and Dibenzyline were given to males. Fish were all maintained in the laboratory for one week before any testing began. Each of the three parts of Experiment I was conducted in the same way. The Bettas were tested first with no drugs in their water to determine their baseline level of activity. Two to four days later, the fish were tested with either 40 mg of amphetamine, 70 mg of norepinephrine or 4.5 mg of Dibenzyline. Another control trial was run two to four days later and then another experimental trial after the same period of time. Results indicated that amphetamine increased fin flaring frequency and duration in female Bettas. The norepinephrine had the effect of increasing gill plate extension frequency and duration. Also the norepinephrine increased time to habituation. Dibenzyline was shown to influence fin flaring frequency and duration. A strong adrenergic blocking agent, Dibenzyline greatly decreased the aggressive display activities but did not significantly alter general activity. The measure of general activity used was latency to feeding. All fish were deprived of food for four days and considered to be hungry. In Experiment II, 16 female Bettas, eight experimental and eight control, received a 25-day treatment with either methyl testosterone dissolved in alcohol or plain alcohol. All fish were tested before any treatment was given and assigned to groups on the basis of the behavioral measure of fin flaring so as to match the experimental and control groups as closely as possible. The experimental fish then were given .2 cc of methyl testosterone (1mg/cc) and the controls were given .2 cc of alcohol. The treatment in all studies was added to the water of the living tank. After 25 days, all Ss were retested to determine what, if any, effects the testosterone had on the display activities being measured. The hypothesis that testosterone would cause an increase in growth rate and colorfulness was not supported by the data. There were, however, significant increases in fin flare frequency and duration and in the average length of a fin flaring response. There was some tendency toward an increase in gill plate extensions as well, but this was not large enough to gain statistical significance.
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Date Issued
1969
PURL
http://purl.flvc.org/fau/fd/FA00000830
Subject Headings
Siamese fighting fish--Behavior, Aggressive behavior in animals, Siamese fighting fish--Physiology
Format
Document (PDF)