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Cover illustration. Notothenioid fishes lack swim bladders, but species live temporarily or permanently in the water column. Without swim bladder, skeletal mass becomes a key determinant of buoyancy. In this issue of the Journal of Morphology, Joseph Eastman and coauthors (pp. 841–861 10.1002/jmor.20258) quantify the degree of skeletal ossification in notothenioid fish and discuss it in phylogenetic...
Although notothenioid fishes lack swim bladders, some species live temporarily or permanently in the water column. Given its relatively high density, skeletal mass is a key determinant of buoyancy. Notothenioids have reduced skeletal ossification, but there is little quantitative data on the phylogenetic distribution of this trait. We obtained dry skeletal masses for 54 specimens representing 20 species...
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