Previous studies
showed that head size, eye size and pectoral fin
sizeshape as well as skin thicknessstructure
and the size of the ventricle, liver and gonads are
affected by this process We measured the total length along the body of
anesthetized eels from the tip of the snout to the
caudal end of the caudal fin. Snoutpectoral
length was measured to the nearest 0.1 mm from
the tip of the snout to the cranial attachment of
the pectoral fin.