LDH-B4 specific activity was determined from Fundulus heteroclitus collected in the field and from laboratory-acclimated fish from four latitudinally distinct populations. The differences in the enzyme activity between populations for both field-caught and laboratory-acclimated fish are significant, with the northern populations having the highest LDH-B4 enzyme activity. This clinal variation in enzyme activity is consistent with an evolutionary mechanism that compensates for lower environmental temperatures in colder northern latitudes.
ASJC Scopus subject areas
- Animal Science and Zoology