FIGURE LEGENDS
FIGURE 1 External and internal aspects of Astyanax
lacustris oocytes in SEM after cryofracture. a) Oocytes (Oo) surrounded
by a connective membrane (Cm); b) Enlargement of an oocyte, with
emphasis on theca cells (Tc), yolk vesicles (Y) inside and the zona
pellucida (zp); c-d) Emphasis on the region of theca cells (Tc), with
the yolk vesicles (Y) and the zona pellucida (zp) still visible; e)
Evidence for yolk vesicles (Y) and zona pellucida (zp); f-g)
Augmentation of the zona pellucida (zp) and its pores (P), with the
presence of squamous follicular cells (Fc); h) Micropyle (Mp) and yolk
vesicles (Y) on the oocyte wall; i) Some oocytes (Oo) and a connective
membrane (Cm) surrounding them, with emphasis on the presence of blood
vessels (bv) branching off this membrane.
FIGURE 2 Astyanax lacustris ovaries on SEM after
cryofracture. a) Highlight for theca cells (Tc) and the zona pellucida
(zp) in a more external view of an oocyte; b) Emphasis on the
arrangement of theca cells (Tc); c) Connective membrane (Cm) surrounding
the oocytes (Oo); d) Highlight for the connective membrane (Cm) and the
network of blood vessels (bv) arranged in it.