MERI.\'TIC AND MORPH01lJFTRIC V4RIATION.\' BETWEEN TWO SPECIES OF C4 TFISH CL4RIA \' I A7ERA A'VJ) CLARIAS , - -- -.- -- ._----- ---­ ,-1N(lL'ILLAl{lS, IN THE FXiYPTL 1N FRESHWATER.

MERI.\’TIC AND MORPH01lJFTRIC V4RIATION.\’ BETWEEN TWO
SPECIES OF C4 TFISH CL4RIA \’ I A7ERA A’VJ) CLARIAS , – — -.- — ._—– —­
,-1N(lL’ILLAl{lS, IN THE FXiYPTL 1N FRESHWATER.
By
SHNOUDY A. BAKIIOUM,
Nationalillstitute of Oceanography and Fisheries, Alexandria, Egypt
Key Words: Morphometric; Catfish; Freshwater, Egypt.
ABSTRACT
Ihe present comparative study ofsamples of Clarias lazera. and Clarias
anguillaris collectedfrom the River Nile, lake Mariut and lake Edku between
/989 and /991, revealed signtficant dtfferences in two meristic character.’)’ and
seventeen mOlphometrk measuremel11s, the two meristic characters, vertebral
number and gill raker l1umber reflect the environmental and genetical
variation between catfish species.