Synopsis
A technique using two downward-directed 35 mm cameras has been modified to measure the three-dimensional structure of fish schools. The resulting stereo pairs of photographs are analyzed, producing the 3-coordinate location of each fish's nose, after correction for lens distortion and refraction. Separation angles (bearing and elevation) and distance can then be determined for any pair of fish in the school. The technique's high level of accuracy is demonstrated for an underwater calibration field. It is then applied to the measurement of the 3-D structure of schools of coho salmon (Oncorhymchus kisutch) swimming in a hatchery trough. Although the fish were not organized in a rigid crystal lattice, the analysis provided some evidence of structure.
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References cited
Batschelet, E. 1965. Statistical methods for the analysis of problems in animal orientation and certain biological rhythms. Amer. Inst. Biol. Sci., Washington. D.C. 57 pp.
Breder, C.M., Jr. 1954. Equations descriptive of fish schools and other animal aggregations. Ecology 35 361–370.
Breder, C.M., Jr. 1959. Studies on social groupings in fishes. Bull. Amer. Mus. Nat. Hist. 117: 393–482.
Breder, C.M., Jr. 1976. Fish schools as operational structures. U.S. Fish. Bull. 74: 471–502.
Cullen, J.M., E. Shaw & H.A. Baldwin. 1965. Methods for measuring the three-dimensional structures of fish schools. Anim. Behav. 13: 534–543.
Dambach, M. 1963. Vergleichende Untersuchungen über das Schwarmverhalten vonTilapia-Jungfischen (Cichlidae, Teleostei). Zen. f. Tierpsychol. 20: 267–296.
Graves, J. 1977. Photographic method for measuring spacing and density within pelagic fish schools at sea. U.S. Fish. Bull. 75: 230–234.
Healey, M.C. & R. Prieston. 1973. The interrelationships among individuals in a fish school. Fish. Res. Board Can., Tech. Rept. 389, 15 pp.
Hunter, J.R. 1966. Procedure for analysis of schooling behavior. J. Fish. Res. Board Can. 23: 547–562.
Major, P.F. & L.M. Dill. 1978. The three-dimensional structure of airborne bird flocks. Behav. Ecol. Sociobiol. 4: 111–122.
Partridge, B.L. 1980. The effect of school size on the structure and dynamics of minnow schools. Anim. Behav. 28: 68–77.
Partridge, B.L. & T.J. Pitcher. 1979. Evidence against a hydrodynamic function for fish schools. Nature 279: 418–419.
Partridge, B. & T.J. Pitcher. 1980. The sensory basis of fish schools: relative roles of lateral line and vision. J. Comp. Physiol. 135: 315–325.
Partridge, B.L., T.J. Pitcher, J.M. Cullen & J. Wilson. 1980. The three-dimensional structure of fish schools. Behav. Ecol. Sociobiol. 6: 277–288.
Pitcher, T.J. 1973. The three-dimensional structure of schools in the minnow.Phoxinus phoxinus (L.). Anim. Behav. 21: 673–686.
Pitcher, T.J. 1975. A periscopic method for determining the three-dimensional positions of fish in schools. J. Fish. Res. Board Can. 32: 1533–1538.
Symons, P.E.K. 1971a. Spacing and density in schooling threespine sticklebacks (Gasterosteus aculeatus) and mummichog (Fundulus heteroclitus). J. Fish. Res. Board Can. 28: 999–1004.
Symons, P.E.K. 1971b. Estimating distances between fish schooling in an aquarium. J. Fish. Res. Board Can. 28: 1805–1806.
Van Olst, J.C. & J.R. Hunter. 1970. Some aspects of the organization of fish schools. J. Fish. Res. Board Can. 27: 1225–1238.
Weihs, D. 1973. Hydromechanics of fish schooling. Nature 241: 290–291.
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Dill, L.M., Dunbrack, R.L. & Major, P.F. A new stereophotographic technique for analyzing the three-dimensional structure of fish schools. Environ Biol Fish 6, 7–13 (1981). https://doi.org/10.1007/BF00001793
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DOI: https://doi.org/10.1007/BF00001793