caa a22 4500 477116450 CHVBK 20180405111623.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00002379 doi (NATIONALLICENCE)springer-10.1007/BF00002379 Janssen John Biology Department, Loyola University, 6525 North Sheridan, 60626, Chicago, IL, USA aut Use of the lateral line and tactile senses in feeding in four antarctic nototheniid fishes [Elektronische Daten] [John Janssen] Synopsis: Fishes of the family Nototheniidae (Pisces: Perciformes) dominate antarctic fish communities and have radiated to fill diverse niches. The most southern species must operate under an extended austral night and under thick sea ice, yet have eyes more typical of shallow coastal fishes. In winter, the eyes are probably useless, except for detecting bioluminescence. I compared the responses of four species to hydromechanical and tactile signals: two benthivores,Trematomus bernacchii andT. pennellii, a benthic planktivore,T. nicolai, andPagothenia borchgrevinki, which feeds near the ice undersurface and within ice cracks. The planktivores have dorsal mouths, with eyes oriented dorsally or laterally (Pagothenia); their lateral line canals and receptor organs are larger dorsally. The benthivores have more ventrally oriented mouths and eyes. All species responded to hydromechanical cues to the head, but only the two benthivores responded to trunk hydromechanical stimuli or tactile stimuli to the ventral trunk or pelvic fins. Possibly responses to plankton along the trunk are of little use if a reorientation washes pelagic prey away. In responding to trunk stimuli,T. bernacchii reorients its head to the target in two stages by slowly pivoting on its pelvic fins. In contrast,T. pennellii reorients in a single quick flip. It is argued that, becauseT. bernacchii has wider canals thanT. pennellii, it must move more slowly to reduce self-generated noise. It is likely that further studies of winter diet and prey behavior may reveal the relative advantages of the two repositioning styles. Kluwer Academic Publishers, 1996 Nototheniidae nationallicence Pagothenia nationallicence Sensory ecology nationallicence Trematomus nationallicence Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl 47/1(1996-09-01), 51-64 0378-1909 47:1<51 1996 47 10641 https://doi.org/10.1007/BF00002379 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00002379 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Janssen John Biology Department, Loyola University, 6525 North Sheridan, 60626, Chicago, IL, USA aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Kluwer Academic Publishers; http://www.wkap.nl/ 47/1(1996-09-01), 51-64 0378-1909 47:1<51 1996 47 10641 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer