caa a22 4500 465763464 CHVBK 20180323111906.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF00233689 doi (NATIONALLICENCE)springer-10.1007/BF00233689 Ontogeny of vision in the Antarctic fish Pagothenia borchgrevinki (Nototheniidae) [Elektronische Daten] [N. Pankhurst, J. Montgomery] Summary: Pagothenia borchgrevinki ranging in size from 63 to 245 mm were captured from beneath sea ice in McMurdo Sound by fishing and diver collection. Changes in ocular morphology with increasing body size were measured, and assessed in relation to ingested prey. Relative eye size was highest among smaller fish (<100mm total length), and declined with increasing fish size. This was accompanied by a decrease in cone density in the retina from a maximum of 14,200 mm−2 in the smallest fish examined (63 mm), to 1000 mm−2 in a 220 mm long fish. Theoretical acuity was lowest among fish at either end of the size range examined (minimum separable angle 40-50′) but approximately constant over the remainder of the size range (25-40′). Rod density also decreased with increasing body size but rod numbers per unit visual arc were relatively constant, except in the smallest fish, where angular rod density was low. The same prey taxa occurred in fish of all sizes; however, prey items smaller than about 1.5 mm were not taken by fish of any body size. Springer-Verlag, 1990 Pankhurst N. Leigh Marine Laboratory, University of Auckland, Private Bag, Auckland, New Zealand aut Montgomery J. Department of Zoology, University of Auckland, Private Bag, Auckland, New Zealand aut Polar Biology Springer-Verlag 10/6(1990-06-01), 419-422 0722-4060 10:6<419 1990 10 300 https://doi.org/10.1007/BF00233689 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00233689 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pankhurst N. Leigh Marine Laboratory, University of Auckland, Private Bag, Auckland, New Zealand aut NATIONALLICENCE 700 1- Montgomery J. Department of Zoology, University of Auckland, Private Bag, Auckland, New Zealand aut NATIONALLICENCE 773 0- Polar Biology Springer-Verlag 10/6(1990-06-01), 419-422 0722-4060 10:6<419 1990 10 300 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer