Current Search: Aggressive behavior in animals (x)
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- 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.
Show less - 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)
- Title
- Aggressive Behaviors Of Adult Male Atlantic Spotted Dolphins (Stenella frontalis) During Intraspecific And Interspecific Aggressive Interactions.
- Creator
- Volker, Cassandra L., Herzing, Denise L., Hughes, Colin, Florida Atlantic University, Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Atlantic spotted dolphins (Stenella frontalis) and bottlenose dolphins (Tursiops truncatus) are two sympatric species resident to the Bahamas. The visibility of the Bahamian water provided a unique opportunity to study spotted dolphin communication during aggression. This study’s main focus was to decipher any similarities or differences in the behaviors used by spotted dolphins during interspecific and intraspecific aggression. Both similarities and differences were discovered. Biting,...
Show moreAtlantic spotted dolphins (Stenella frontalis) and bottlenose dolphins (Tursiops truncatus) are two sympatric species resident to the Bahamas. The visibility of the Bahamian water provided a unique opportunity to study spotted dolphin communication during aggression. This study’s main focus was to decipher any similarities or differences in the behaviors used by spotted dolphins during interspecific and intraspecific aggression. Both similarities and differences were discovered. Biting, following, and chasing behavioral events were used more during interspecific aggression, while the display behavioral class was used more than the contact behavioral class during intrabut not interspecific aggression. This study showed that spotted dolphins use more energy intensive and risky behaviors when fighting interspecifically. This could result from having to fight and defend females from a larger species, trying to avoid sexual harassment from bottlenose males, or needing to use behaviors that are more overt and easily understood during interspecies communication.
Show less - Date Issued
- 2016
- PURL
- http://purl.flvc.org/fau/fd/FA00004638, http://purl.flvc.org/fau/fd/FA00004638
- Subject Headings
- Atlantic spotted dolphin--Bahamas., Aggressive behavior in animals., Social behavior in animals., Aquatic mammals--Behavior., Predation (Biology), Predatory marine animals--Ecology.
- Format
- Document (PDF)
- Title
- Does size really matter: how synchrony and size affect the dynamic of aggression between two sympatric species of dolphin in the Bahamas.
- Creator
- Cuksick, Jessica A., Charles E. Schmidt College of Science, Department of Biological Sciences
- Abstract/Description
-
Bottlenose (Tursiops truncatus) and spotted (Stenella frontalis) dolphins are sympatric species, resident to Little Bahama Bank, Bahamas. A unique, dynamic methodology quantified how interspecific aggression changed over time in terms of the individuals participating, context, and behaviors used. The timing of human observation relative to the onset of aggression did not result in differences in the proportion of behaviors observed. Highly intense behaviors were used most often. The...
Show moreBottlenose (Tursiops truncatus) and spotted (Stenella frontalis) dolphins are sympatric species, resident to Little Bahama Bank, Bahamas. A unique, dynamic methodology quantified how interspecific aggression changed over time in terms of the individuals participating, context, and behaviors used. The timing of human observation relative to the onset of aggression did not result in differences in the proportion of behaviors observed. Highly intense behaviors were used most often. The synchronous state of spotted dolphin groups, not the presence alone, was a crucial factor in determining the onset and progression of aggression. When synchronous, spotted dolphins successfully dominated the larger bottlenose dolphins. Two levels of dominance were observed. Within a single encounter ("encounter level"), one species did dominate the other. When all aggressive encounters were considered collectively over the long term ("gross level"), one species did not dominate the other. The combination of contextual factors best determined the dynamic of interspecific aggression.
Show less - Date Issued
- 2012
- PURL
- http://purl.flvc.org/FAU/3342044
- Subject Headings
- Bottlenose dolphin, Behavior, Research, Atlantic spotted dolphin, Behavior, Research, Mammals, Behavior, Aggressive behavior in animals
- Format
- Document (PDF)