
THE PROPAGATION OF THE GOLDFISH 

Martine. The mating season of the goldfish is during the warm 
spring and summer months, when the water is at 60° or over, and spawn- 
ings occur at frequent intervals, as with this species of Cyprinidz all the 
FIG, 55. Embriology of the Goldfish. 
1. Newly exuded egg, not fecundated, wrin- 
kled and unexpanded surface covered 
with vesicles. Full and lateral views. 
v 
Egg, four and ten hours after fecundation, 
showing germination and formation of 
membrane. 
Development of embrio and plasmic pro- 
w 
cesses at edge of membrane, 24 and 34 
hours after spawning, 
4. Development of alevin and yolk-sac, 50 
and 58 hours after spawning. 
5. Free-swimming alevin attached to the yolk- 
sac, showing skeleton, partly developed 
digestive organs and surface colors. 
Four days old. 
6. Alevin five days old; dorsal and caudal fins 
partly developed. 
7. Alevin seven days old; pectoral and anal 
fins developed. 
8. The fully developed Telescope fry, ten€ { 
days old. 

Greatly enlarged, Actual size, No. 8, |———_| 
eggs do not mature at the same time. During this period the distinguish- 
ing characteristics of the male are developed and consist of wartlike pro- 
tuberances or papillose tubercles on the opercule and main rays of the pec- 
toral fins, Fig. 1o(page 46), which have distinct sexual purpose. Another 
go 
