Biology Reference
In-Depth Information
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Figure 6.9 Postmetamorphic Atlantic halibut (Hippoglossus hippoglossus) with full ossi-
fication showing variation in cranial symmetry and degree of eye migration. Index of eye
migration ranges from a scale of 0 (no eye migration) to 4 (complete eye migration).
Profiles of the ocular side (left column) and blind side (middle column) are depicted.
Each fish is presented with schematic drawings of cranial ossification in a top view
showing torsion of the Frontal bones between the eyes (right column). Eye index
was decided prior to photographing. Fish representing indices 0 and 1 are Artemia
fed, whereas the remainder are zooplankton-fed. All fish are aged 40 days post start
of feeding (dpsf) except the upper fish that is 46 dpsf. Reproduced in modified form with
permission from
Saele, Silva, et al. (2006)
and
Saele, Smaradottir, et al. (2006)
.
influenced by both larval nutritional status (see reviews by
Fernandez &
Gisbert, 2011; Hamre & Harboe, 2008; Hamre, Holen, & Moren, 2007;
Hamre, Moren, Solbakken, Opstad, & Pittman, 2005
) and environmental
parameters such as photoperiod (
Harboe, Mangor-Jensen, Moren,
Hamre, & Rønnestad, 2009; Solbakken & Pittman, 2004
) and temperature
