Corrivcult, Ge Wilfrid and Jean-Louis Tremblay 



1946 Travail de recherche s\jr le hoi.]nrd lioinarus 



aiaericanuE. Rappo Gen. Stat. Biol. St. -Laurent 

 19'i3-1944-1945 (1946), App. no. 1, pp. 35-73, 

 illus. 



(p. 61) 



Observatio ns on the l arvu e in captivity; 



In response to the desire inanifcsted by the authorities of 

 the provincial I'inistry of Fisheries, the bioloi_i;ical station has 

 xmdertal^en experiiaents to bring to a focus the methods or techni- 

 ques concernitt';- the rearing of lobster larvae. To this end, n 

 buildin^^ has been constructed in 1944. ■'»• reservoir -vfith a capacity 

 of 6000 gallons, 15 feet from the ground, supplies Yirith sea water 

 fovr rearing tanlcs situated on the j^jround floor of the establishment. 



'^'^^® ^'GC.J' . ^ -^^-S basins : 



The rearing basins are of a different type than those which are 

 used by the rearing establishments situated on the Atlantic Coasts, 

 in the states of ifcine and Rhode Island: they are rectangvilar con- 

 crete basins, measuring six feet by three feet, r.ivided in tlie 

 middle part by c partition. Tv/o vrater entries, one on the surface 

 and the other nt the bottom creates a one to tv;o miles per hour 

 current, according to the v;ater supply. 



L fmr thousand larvae have been pic ced in tvTO tanlcs in the 

 course of last season© Despite the fact that the experiment has net 

 been crovmed v/ith the desired success, xve have nevertheless been 

 able to inquire into the efficacy, of the rearing i-^asins. A water 

 current of one to two miles per hour is as efficacious as a nechrn- 

 ical agitation to prevent the agglomeration of larvae and cannibalism 

 in the rearing tanlcs. Moreover, their shr^pe facilitates t}ie rapid 

 gathering of the larvae by means of a net wliose contour fits the 

 shape of the tanlcs' interior section. The use of the net simplifies 

 the work of collecting the larvae and their transport to another 

 basin for cleaning e 



Circulation of sea water in the rcar ini; establishment : 



The piping of v^ater into the establishment mcs finished onlj?" at 

 the beginning of last season. The irregularity of supply to the sea 

 v/ater reservoir, (vrtiich was) caused by an energy d.efect in the motor 

 necessary for pimping, and the difficulty in maintaining an optim\:u.i 

 temperatiore of the water has com.promised the success of that first 

 experim.enta A change in the water heating system is evident; the 

 installation jf an automatically regulated oil heating system will 

 assure the mt^intenance of a constant temperature. 



PS 



