rjid prevents nt the sa::ie tine- the c.;'^glutirio.tion of the Inrvne, reduc- 

 ing by so iiuch the camiihnlisrn. among then, 



Yfcter consuirption and te:ii)erntiare 



Each of the rerrinfi; basins consunes about 405 gallons of sea 

 ^.'■ater czi hourc. This sea vjater is first wr,.rTrLa.d_ -vz-hich has for its ain 

 t- accelerate the grovjth of young lorvaeo The themographic record- 

 ing sho^7s us that our equipment of control of heat has functioned 

 -.•rell; in fact, the tei.iperrture has been naintaiued at 19" C (66^ F) 

 close to (varying) OaS'^e 



Cleansing of the rearing tanks and t he hat ching b oxes 



The teinper'\ture factor is very important but there is another 

 thing that we have not neglected, it is cleanliness <. Eaoh day vre 

 have made in the rearing basins the preliminary cleo.nsings consist- 

 ing in the eliniration of foreign bodies v/hich settled there either 

 on the bottom and walls or on the -..letal screening of the overflovTo 

 A more thorough cleaning vras rnde then at the change of one group 

 of larvae from one bo:: to another. In the hatching boxes, one vras 

 not able to clean also regularly in consequence rf the presence of 

 berried females o It may see?;: indeed that the tod frequent irirvnipul- 

 ation of these lobsters hurts the eggs* Yet in tlie com-se of the 

 hatching period vie have three times performed the cleaning of each 

 com.partm.ento We have also benefitted in exardning the berried 

 females one by one and eliminating those whose larvae were released® 

 The following Table indicates the number of females that we had at 

 the beginning of reari:|g, the v/oekly mortality rate, as well as the 

 nvinber of females eliminated at each of the inventories. These 

 last data also gives us information on the speed with wliich the 

 larvae are liberated© 



TABLE I 



Berried femiales kept- in captivity for rearing 



_-- „_ - 



f In-ye n tory 



Week r~ Date } No,, fer.iiles T Mortality i No, of 



J : eliminated I I feir.ales 



• 



July 14 — ;: — — - 204 



" 15-19 ~ — — 8 .196 



" 20-26 26 30 .11 155 



" 27-) 

 Augo 2 ) 



146 



'• 3-9 6 99 47 



" 10-16 — . — - — - 47 



119 



