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Fish Cliques: Evidence of Social Groups from Sp...

Jean V. Adams
August 02, 2016

Fish Cliques: Evidence of Social Groups from Sparse Observations in Time and Space?

Presented at Joint Statistical Meetings, 2 August 2016, Chicago, IL.

Jean V. Adams

August 02, 2016
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  1. Fish Cliques: Evidence of Social Groups from Sparse Observations in

    Time and Space ? USGS - Great Lakes Science Center Jean Adams, Stephen Riley, Taaja Tucker Michigan State University Charles Krueger, Thomas Binder
  2. Same station: 4 days Both observed: 7 days Together: 4

    / 7 = 57% Unique stations: 3 Detections for one pair of fish
  3. • Hypotheses • H0 : seasonal movement patterns • HA

    : synchronized "group movement" • Identify groups that move together • together > 50% 11 pairs of fish • > 2 unique stations 17 individuals Detections for all pairs of fish
  4. observed • Randomization • Add time shift from -3 to

    +3 days to each fish • Identify groups • repeat 100 times • mean no. fish in groups: 10.7 (7, 18) • Groups we observed are what we would expect by chance • No evidence of "fish cliques"