SOME ASPECTS OF THE HAEMATOLOGY OF FOUR RED SEA F"SH SPECIES DURING THEIR SPAWNING PERIOD By A.lVI. HUmy, N.A. EI-Duniaty and M. said

SOME ASPECTS OF THE HAEMATOLOGY OF FOUR RED

SEA F”SH SPECIES DURING THEIR SPAWNING PERIOD

By
A.lVI. HUmy, N.A. EI-Duniaty
and M. said
BULLETIN OF THE INSTI’r”L’J’E OF’ OCEANOGRAPHY & FISHEH.la.” 207
SUMMARY
I.-An investigstion was made of some aspects of the
haematology of four marine fish species, Ep;nephelus
fasciatus, Epinephelu.s summana, Epinephelus areolatus
and Epinephelus tauvina taken from the Marine Biological
Station at Ghardaqa (Red Sea).
2.-The authors were mainly interested in the determination of the number of erythrocytes, haemoglobin
content and haematocrit values in the four mentioned
species during their spawning puiod.
3.-Visible differences can be observed in the three
parameters studied among the different species. This
variability may be corroborated that the more active type
of fishes have higher values than the less active species
have.
4.-Marked quantitative differences in the values
of the three mentioned parameters exist between the
sexes of the same species, being always lower in females
than in males. The preparation period and the spawning process may cause this considerable decrease.
5.-The species studied have the same correlation
between the number of erythrocytes, haemoglocbin
content and haematocrit values as that previously arrived at for fresh water fishes and other vert(brates.