breeding troughs, but the real rer son vras Mot to be deterirdned and 

 other inerns for the restrioti-ig o.f this fatal cnmiibrlisn can also 

 not be indicated. 



There is not the slij;htest doubt that in natural conditions 

 ar.iounts of larvae hardly -.vorth Mentioning ere clestroyed, for here 

 the principal reason for it is lac]:ing: the tliick crowding thrt is 

 not allowed to hinder them with artificial rearing. In free n-^tvire 

 such crowding niust sm-ely therefore be avoided since they soon 

 attract enenies iu grert nunber and a thorough destruction of the 

 swarns of larvae would be caused. Accunulrtions of sufh r kind are 

 also prevented in nat\n-e in this v;ay that not ever the offspring of 

 a single fomale go into the v;ater at the sam-- tiiacj, since the hatch- 

 ing of a brood talres ^Irce so grrdurlljr that it usually occupies a 

 ftill weeks One also sees that tlie r.rtificial rearing here finds 

 itself at a disadvantage in relation to nature v.'hich they never ^Till 

 be rble to cor.pe:i3ate; just the enorirous expanse "which nature has at 

 its dispos .1 for the distribution of the larvae offers them the most 

 essential expedient for the protect j on of the yoimg lobster from all 

 kinds of dangers. It is also not very li]:ely that artificial lobster 

 rearing will brint; it to results worth mentioning as long as they, as 

 it now happens, must content thoiiis'jlves thcre\7ith to put out directly 

 into the open waters tlie naivly-born larvace It must be aspired to, 

 on the contrary, to hold the larvae in safety until after the end of 

 the fourth moult and t'nen to put then outr. If indeed many larvae 

 until then have fallen victiT,s to cannibalism and t?\e perils of 

 shedding, then it still has a much superior vr lue \rtiexi 1000 fo-urth 

 stage larvae are put c-it tlian one million new-born, Kovex-er here 

 lies just the difficulty* It requires so large and j::i.\mierous 

 receptacles to keep thousands of lobsters living to the fourth stage 

 that this appears hardly feasible in a hatchery and one must prob- 

 ably experiment (?) in a poolo Here howea.er one meets ne-vT obstaclesi, 

 as Appell/f 's researches show, since there the animals withdraw them- 

 selves from controls Appell/f had the greatest difficulties in the 

 lobster po\uid which was used by him for research, l/ in whic?i numerous 



1^/ The lobster pound at Hvidings/ used by Appell;$f in his research 

 included five larger and siaaller plots of land surrounded by 

 \7ater vmich are connected togetlier by a wallo In the wall^, 

 two openings, covered with brass wire netting^ are situated 

 facing each other so that the currei.t runs straight ^hro-agh 

 the basin,, Moreover ;, the water again flows back and forth 

 througii siacller, not controllable., perforations in the v/alla 

 The greatest deptli of this baain amounts to two fathoms; the 

 bottom is partly rock bottom with rich vegetation, part sand 

 bottom v;ith gr.arths of eelgrass. 



young lobsters iiad been borng to find these (young lobsters) with 

 netsc, The first attempts aiming at thi.t with gauze nets resulted 

 entirely negatively; then it appeored that one could vrell catch 



114 



