tetra fish
TRANSCRIPT
Page 1
Schooling Patterns in Paracheirodon innesi
by Marisa Portenti ([email protected]), Frank Minio ([email protected]), Zack Bakun ([email protected])
Page 2
Introduction: Habitat
Tropical America
Why School? Minimize predation Mating ritual Food collection Migration
Page 3
Introduction: RQ: Does the movement of a school of tetra
fish (Paracheirodon innesi) affect the movement of an individual tetra fish?
Hypotheses H0 = no correlation H1 ≠ no correlation Expected: correlation between movement of
school with movement of individual fish
Page 4
Materials:• Tank A (Control)• Tank B (Experimental)• Net• Tetra fish
Tank A (Control)
Tank B (Experimental)
Page 5
Methods:• Control (Tank A):• Separate one fish• Stimulus – swipe net from on side of tank to other• Test school movement • Test response of individual fish• Repeat 10 times per each of 3 subjects
School’s Movement
Page 6
Methods, Continued:• Experimental (Tank B):• Separate one fish• Stimulus – swipe net from on side of tank to other• Test change in subject movement• Repeat 10 times per each of 3 subjects
School’s Movement
Page 7
Results, Control:
• For all three subjects
Page 8
Results, Experimental:
Page 9
Conclusions: H0 = no correlation H1 ≠ no correlation Trial #1: 90% responded Trial #2: 80% responded Trial #3: 80% responded ~83% of average trials responded to
school’s movement
Page 10
Conclusions: Data suggests that the null would be
rejected, implying a strong, positive correlation
Schooling patterns were unaffected by transparent barrier
Page 11
Conclusions:
Improvements Testing with no stimulus to school Quantify data further (Pearson
correlational coefficient, r2) Time-based element
Bias Not all fish were always behind barrier Subject moving independently of
school
Page 12
References: Leo N. 2012. Paracheirodon innesi. USGS
nonindigenous aquatic species database, Gainesville, FL. http://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=426 Buckheim J. A quick course in ichthyology [Internet]. http://www.marinebiology.org/fish.htm
Page 13
Thank You!Any questions?
by Marisa Portenti ([email protected]), Frank Minio ([email protected]), Zack Bakun ([email protected])