caa a22 4500 477116744 CHVBK 20180405111624.0 cr unu---uuuuu 170330e19961201xx s 000 0 eng 10.1007/BF00005051 doi (NATIONALLICENCE)springer-10.1007/BF00005051 Diel patterns of behavior in juvenile walleye pollock, Theragra chalcogramma [Elektronische Daten] [Susan Sogard, Bori Olla] Synopsis: In laboratory experiments, we contrasted the behavior of juvenile walleye pollock under dark and light conditions, comparing group cohesion, activity levels, vertical distribution, and movement into cold water when the water column was thermally stratified. At night the fish displayed a tendency for movement into the upper water column and were less active, with groups more dispersed than during the day. Time spent in cold water under stratified conditions did not differ between day and night. These results are interpreted relative to the potential ecological benefits and costs of particular behaviors, and their application in designing effective sampling surveys of juvenile abundances. Kluwer Academic Publishers, 1996 Fish behavior nationallicence Vertical distribution nationallicence Activity nationallicence Schooling nationallicence Sogard Susan Alaska Fisheries Science Center, National Marine Fisheries Service, Hatfield Marine Science Center, 97365, Newport, OR, U.S.A. aut Olla Bori Alaska Fisheries Science Center, National Marine Fisheries Service, Hatfield Marine Science Center, 97365, Newport, OR, U.S.A. aut Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl 47/4(1996-12-01), 379-386 0378-1909 47:4<379 1996 47 10641 https://doi.org/10.1007/BF00005051 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00005051 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sogard Susan Alaska Fisheries Science Center, National Marine Fisheries Service, Hatfield Marine Science Center, 97365, Newport, OR, U.S.A aut NATIONALLICENCE 700 1- Olla Bori Alaska Fisheries Science Center, National Marine Fisheries Service, Hatfield Marine Science Center, 97365, Newport, OR, U.S.A aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl/ 47/4(1996-12-01), 379-386 0378-1909 47:4<379 1996 47 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer