n 



Fertilized egga of Auxls rochei 

 (marusoda) In morula stage, 0.98 mm 

 In diameter. 



l'osll;irv;i aboiii 5 il.ivs old. 



2(1 hours iillor rcrtili/;ilioii 



l'o<ll.irv;i ;ilioiil 10 J.ivs old. 



2S hours al'lor lerlilizalion. 





N ouii!: fish .iboul I') d.iys old, 4')tiimi in lol.il lcii-;ih. 



Jusi bclorc lutchin!:. 38 hours. 



\J -.-. 



\ * 



Lurvj ahoul I d.i> old. ,V5iliiii in loljl Icnplh. iinni.ilun- llsli .iboiil 52 d.i>s oUI. I.S7nini in lolal lonmh 



Figure 20.— Various stages of development of egg and larva of Auxia rochei (Harada, Murata, and Furutani 1973). 



Experiments on artificial fertilization were continued 

 in 1973. On 15 July 1973, at 0500, ripe eggs were col- 

 lected from A. rochei caught in a set net off Kashino, 

 Oshima (Kushimoto, Wakayama Prefecture), and arti- 

 ficially fertilized (Kinki University Fisheries Experi- 



mental Station 1974). The water temperature at the 

 time of fertilization was 25°C. The fertilized eggs, which 

 averaged 0.903 mm in diameter, were transported to the 

 experimental station at Shirahama. The following day, 

 an estimated 7,000 newly hatched larvae were placed in 



25 



