...James J. Childress; Brad A. Seibel ABSTRACT Zones of minimum oxygen level are found at intermediate depths in most of the world’s oceans and, although the oxygen partial pressure in some of these ‘oxygen minimum layers’ is only a fraction of a kilopascal, populations of pelagic metazoans exist...

...-held specimens, had a highly glycolytic poise (high LDH and PK activities relative to MDH and CS activities), which may suggest that muscle enzyme activities in the field-collected fish reflect adaptation to the low oxygen level in its adult habitat, the oxygen minimum layer. The strong correlations...