Lo bster c ulture \Torking days 



It is July 6 at 5e30 in the afternoon that v/e have observed 

 the first larvae in the collector. It wrs only a precursory sign of 

 their coning arrival for^, during the v,'eek \\rhich follov/ed, their 

 nuxaber hardly exceeded lOOj therefore \re have bothered v;ith them in 

 the collectors. On July 12, the hatching began in earnest. The 

 rearing station vf as then put into operation and it had 'to function 

 v.-ithout interruption up to August 15o This has been rendered possible 

 thanks to the formation of three cre\TS of tv;o assistants \7ho vorked 

 eight hour shifts. 



Larvae hatched and eraployed in rearing 



In the course of four and a' half v:ceks of operation, vre have 

 gathered 96,062 larvae distributed into six groups, according to the 

 date of their hatcliing. 



TABLE 2 



Grouping of the larvae used for rearing 



Total 



96,062 



One sees, according to the Table that the groups do not alvrays 

 include the saine number '^f larvae and that the time of collection 

 has not been the same for all the groups c It should have been pre- 

 ferable that the groups iiiight be very homogeneous; but it has been 

 impossible for us to fulfill this conolition, being given the except- 

 ional slovmess of hatching (see curve/ page 55) s 



It is to be noted that groups 1 and 2 have been lost as a result 

 of a perforation, barelsr visible, of the metal screening, of the basin 

 holding those groups. Finally, only groups. 3, 4, 5 and 6 have been 

 conducted to a good end, therefore v/e shall consider only the latter 

 ones 



t;^le 3 



Larvae released in the sea 



Group J No. larvae hatched j !'o. larvae liberated 



Stage 



120 



36 



233 



613 



1,826 



4 

 4 

 3 



and 



