The iiicubator is closed by n cover, like a coffin, Q'«i nil is 

 pr.inted bli'.ck on the exterior.- 



The \7r.ter tenperc^ture of the tank is thnt of the s- :-. watere 

 The lobster eggs need darlaiesso The apparatus therefore places the 

 egg under the usual conditions of its ordinary life; two rope handles, 

 placed on each extrenity, permit the renoval and the balancing of 

 the tankf) 



Thus furnished v^rith all the gear, the incubator is worth three 

 dollars p Six hundred exist in actual activity; it is feivr. There are 

 in all the country 50 stations -.rhere they appear* It is an apparatus 

 ectsy to inake» little cost; we have ;:ust seen^ very ingenious » It 

 replaces advantageously the former iietal tanl:s» It is vj-ished for the 

 posterity of the fishery that the use is spread more and nore« 



Ivit, Neilsen recognizes that the fishermen shov; a certain eager- 

 ness to take rdvantage of this apparatus, ivhereas on the contrary 

 they resist the us.e of applied science to the cod research, probably 

 on account of the much greater expensoe 



Havinga.c B, 



1921 Rapport over de Ijreeffcenvisscherij in Zeeland en de 



Kunstmatige kreeffcenteelt s Mededeelingen en Verslagen 

 van de Vissclierijinspcctie, no* 30,, 51 p.,, illuss 



Report on the Zeeland lobster fishery and artificial lobster rearing 



(Translation hy Louise Pincrd Dekker .in 1949) 



Chapter III 



The A rtifici al Propagati on of Lobste rs 



In the preceding chapter we have seen that the young lobsters, 

 just emerged f^om the eggs, differ widely from the adult ones in 

 manner of livingc They do not live on the bottom but in higher 

 vrater strata, do engage in active EX'/ira movements but let them.selves 

 be svj-ept along by even weakly streaming vmtero They are tyi^ical 

 plankton oiganisLiSj In ordinary aquarj-a it is impossible to keep 

 them alivco 



It is plrin thrt the dangers which threaten these larvae are 

 exc ept i ona 1 ly gr eat -. 



In the first place must be listed the danger of destruction by 

 all sorts of fish v/hich are r-,ften found in large schools in the 

 Ooster Schelde, like herring., anchovies, Belone acu s and Mugi l 

 chelo. The young of the last named, which I kept in my aquaria 

 ma.ny tines, devoiired in no time all the larvae which vrere put in 



123 



