The ovaries of control fish had about 15% small ova and
85% yolky ova. The transparent ova counted vary
between 3 and 7%, and a number of yolky eggs varied
between 9 and 20% as indicated in Figure 3a. Thus the
present result revealed that the presence of more ova
sizes indicating a long spawning season and the
fractional spawning characteristics as indicated by Zaki
et al. (1995) for Oblada melanura and Assem (2003a) for
Pagellus erythrinus. The ovary of female T. zillii injected
with 10 µg/fish of shark DNA had about 28% small ova
and 72% yolky ova as indicated in Figure 3b. While the
female injected with 20 µg /fish had about 38% small ova
and 62% yolky ova as indicated in Figure 3c. The ovary
of femal injected with 40 µg /fish had about 43% small
ova and 57% yolky ova as indicated in Figure 3d. The
ovary of female injected with 80 µg DNA/fish had about
51% small ova and 49% yolky ova as indicated in Figure
3e. In the present results, the number of small ova in
ovary of control female was less than that of injected
females. Similar observations have been recorded (ElZaeem
and Assem, 2004). Moreover, these results may
be related to absence of atretic oocyte in control ovary.
The results of the present study support the finding of
Clay (1989) and Zaki et al. (1995) for Oblada melanura,
which indicated that in normal teleost fish the count of
small ova was increased at the end of spawning season.