. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHEMICAL INHIBITION OF REPRODUCTION 5-day-old females (Figs. 45-48) 127 The untreated females had laid eggs and the ovaries in these (Fig. 45) resembled those of approximately 2-3-day-old unfed females. A differentiation between the oocyte and the nurse cells was obvious in the second egg chambers (Fig. 47; Stage I-II). However, the ovaries (Fig. 46) and the ovarioles (Fig. 48) in treated females remained unchanged and FIGURES 49-56. Male reproductive tissues in apholate-treated and untreated males. The size of
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHEMICAL INHIBITION OF REPRODUCTION 5-day-old females (Figs. 45-48) 127 The untreated females had laid eggs and the ovaries in these (Fig. 45) resembled those of approximately 2-3-day-old unfed females. A differentiation between the oocyte and the nurse cells was obvious in the second egg chambers (Fig. 47; Stage I-II). However, the ovaries (Fig. 46) and the ovarioles (Fig. 48) in treated females remained unchanged and FIGURES 49-56. Male reproductive tissues in apholate-treated and untreated males. The size of the male reproductive parts (Figure 49; 20 X), including the testes (Figure 51; 80 X), of 8-day-old untreated males is not markedly different from similar structures (Figure 50; 20 X, and Figure 52; SOX) in 9-day-old treated males. The amount of sperm in the testes (Figure 53; 80 X) and seminal vesicles (Figure 55; 80 X) of the untreated males, however, appears to be more than in the testes (Figure 54; 80 X) or in the seminal vesicles (Figure 56; 80 X) of the treated males. The epithelium of a testis shows necrosis (Figure 54). Effect on the male reproductive tissues (Figs. 49-56) Dissection of the spermathecae of females caged with males developing from larvae treated at second instar (hereafter designated treated males) disclosed the presence of motile sperms. This indicated that the sperm are produced by the treated males. However, the egg hatchability data in Table I indicated that most of the sperm produced by the treated males must contain dominant lethal mutations, for when these sperms inseminated the normal females, the hatchability of the eggs was extremely low. Several dissections of the male reproductive tissues from 8-day-old untreated and 9-day-old treated unmated, males were made. Preliminary results indicated that the size of the male reproductive structures, including the testis, was not appreciably different in the untreated (Figs. 49 and 51) and the treated
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