Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Betta Aggression

No description
by

Bethany Richards

on 13 June 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Betta Aggression

Ben Gulmon, Mary Kate Pugh & Bethany Richards
The Effects of Color & Audience on Betta Fish Aggression
Experimental Design
Summary
Randomly assigned fish treatments
Tank position
Recorded behaviors:
Gill flare
Tail beat
Bite
Body length opponent
Body length audience
Up against glass
Up for air
Research Questions
Does color of fish (blue or red) affect aggressive behavior display toward opponent?

Is there an audience effect?
Color & Audience Effect
Expected Results
Red fish aggressive displays > blue fish aggressive displays
Aggressive displays will vary with audience size:
5 female audience aggression > 1 female audience aggression
0 female audience aggression >> 1 & 5 female
How do our results relate to other work?
We did not observe an audience effect
Could not conclude presence of innate aggression due to red coloration
Future studies?
Test fish among various strains
Increase audience variability
Change the color of audience members
Increase opponent/subject potential interaction
Questions?
Figure 1. The total number of gill flares each blue (A) and each red (B) Betta displayed toward the opponent for the duration of each scan for three separate trials. No significance was calculated between red (mean = 23.8) and blue (mean = 20.4) total gill flare count (t = 0.43, df = 40, p = 0.335)
A
B
Figure 2. The latency to the first gill flare toward the opponent for each blue (A) and each red (B) Betta fish for all three treatments. Red fish (mean = 3.8) displayed the first gill flare significantly sooner than blue fish (mean = 11.8) (t = -2.47, df = 33, p = 0.0094265).
A
B
Figure 3. The variance of aggression scores for each individual colored fish calculated from all three treatments. Red (mean = 83.2) were significantly more variant than blue (mean = 15.5) when all variance scores were compared (t = 1.88, df = 10, p = 0.0448).
Figure 4. The variance of aggression scores over the mean aggression score for each fish for all three treatments. Significance was not found between color and variance when controlled for mean (t = 1.02, df = 10, p = 0.166).
References
Doutrelant, C., McGregor, P. K. & Oliveira, R. F. 2001. The effect of an audience on intrasexual communication in male Siamese fighting fish, Betta Splendens. Behavioural Ecology, 12, 283-286.

Dzieweczynski, T. L., Bessler, A.M., Shelton, D. S. & Rowland, W. J. 2006. Effect of a Dummy Audience on Male-Male Interactions in Siamese Fighting Fish, Betta Splendens. Ethology, 112, 127-133.

Dzieweczynski, T. L., Earley, R. L., Green, T. M. & Rowland, W. J. 2005. Audience effect is context dependent in Siamese fighting fish, Betta splendens. Behavioural Ecology, 16, 1025—1030.

Dzieweczynski, T. L., Lyman S. & Poor, E. A. 2009. Male Siamese Fighting Fish, Betta splendens, Increase Rather than Conceal Courtship Behavior when a Rival is Present. Ethology, 115, 186-195.

Herb, B. M., Biron, S. A. & Kidd, M. R. 2003. Courtship by Subordinate Male Siamese Fighting Fish, Betta Splendens: Their Response to Eavesdropping and Naïve Females. Behaviour, 140, 71-78.

Matos, R. J. & McGregor, P. K. 2002. The effect of the sex of an audience on male-male displays of Siamese fighting fish (Betta splendens). Behaviour, 139, 1211—1222.

Pryke, Sarah R. "Is Red an Innate or Learned Signal of Aggression and Intimidation?" Animal Behaviour 78.2 (2009): 393-98. 27 June 2009. Web. 28 Apr. 2013.
No significant correlation between aggressive behavior and fish color or audience
Blue fish tended to be more consistent with other blue fish
Red fish tended to be more random in their observed behaviors
Specifically, does the presence of female Betta fish affect male aggressive behavior?
If audience has an effect, does the size of the audience have a variable effect?
Full transcript