lobster larvce in the t-v7ili|^ht or the night, p!?rticularly in still 

 v;ater, hovrever these vere all in the first stage; and v;herc partic- 

 ularly the older larvae dvrellGd, if they Virere present at all, could 

 not bo deterriined although they \:ere ttlso fished for in the depths. 

 Unfortunately, the possibiliti'- must be reokonod with that the 

 lobster larvae had escaped fron the pork into the neif^hboring open 

 vj-ater v.hich could not be absolutely prevented. On the other hand, 

 it deiionstrated that soj.ie sLiall gadoids (coalfish and pollack), 

 iThich entered the pound fron the putcide and had been caught in it, 

 had eaten the lobster larvae' r.lnost ivithout exceptiono It is 

 therefore possible that the young' larvae from the second stage on 

 keep themselves in hiding not on t ho -bottom to be sure, but yet 

 in the nei.vhborhood of it vhere of course they are hunted up by 

 their pursuers, but are not available to the gauze netse HoiTever 

 it re:m ins. remarkable that Appell/f was not able to get ahold of 

 the older lobster larvae although he succeeded in enticing and 

 catohing other and similar ani;-als v/hioh also live in hiding with 

 the help, of- sink nets and srr.ll- traps especially constructed for 

 this purpose r.tiich vrere baited and set on the.bottomo 



Also in Helgoland v;e have had the experience that the lobster 

 larvae- of t}ie first stage vrere caught no doubt oft ener --although 

 also not frequei:tly — in the season from mid-June to mid-September, 

 older stages on the other hand not at all as v/ell; only once the 

 capture of a 13 mm. long third stage larvae \Tas noted, on Septem- 

 ber 7e Therefore it proves also as impractical to determine 

 according to Hensen's proposal, the size of the Helgoland lobster 

 population. by means of quantitative captures of larvae v/ith the 

 aid of vertical fishing planlcton nets. 



It is cvlso clear that our knoT;ledge of the juvenile history 

 of the lobster still shows very many gapso One has also never 

 succeeded in capturing in the free state the first bottom stages 

 of the lobster* Hov;ever it is explained sufficiently fron the 

 minuteness and great versatility of these anir.iCils and from their 

 preference for hiding under stones which are hardly accessible 

 and v/hich t^iey unvdllingly leave* One~knov/s meaiT/rhile their 

 appearance and the rapidity of their groi-.-th from the rearing 

 experiments. 



(p. 152) 



Gonpelj Ii»' and Ro Legendre 



1927 ■■ Effets de la temperature, de la sal-ure et du pH svr 

 -. les larves de h-omards» G, Ra Soce Biole, t. 47, 

 ppa 1050-1060 



Effects of tempGratvure, salinity and pH on the larvae of 



lobsters 



Tie have begun this svcTimer, at the marine laboratory of the 

 College of Fjrance at Concarneau, a series of researches relative 



115 



