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TEMPORAL PATTERNS IN THREE-DIMENSIONAL STRUCTURE AND ACTIVITY OF SCHOOLS OF THE ATLANTIC SILVERSIDE 'MENIDIA MENIDIA'
Citation:
Koltes, K. TEMPORAL PATTERNS IN THREE-DIMENSIONAL STRUCTURE AND ACTIVITY OF SCHOOLS OF THE ATLANTIC SILVERSIDE 'MENIDIA MENIDIA'. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-84/303 (NTIS PB85220358), 1984.
Description:
Temporal patterns in the structure and activity of schools of the Atlantic silverside Menidia menidia were investigated under laboratory conditions using a new computerized video technique for three-dimensional analysis. Fish were collected by seining at Middle Bridge, Pettaquanscutt River, South Kingstown, RI, USA. Four measurements of structure and activity were computed: (1) swimming speed (SPEED); (2) distance to nearest neighbor (NN); (3) mean direction of travel (DOT); (4) depth in the tank (DEPTH). Results demonstrated a strong seasonal rhythm in the behavior of schools, but were inconclusive in showing periodicities associated with daily, tidal or lunar cycles.