. Report upon lobster investigations at Long Beach Pond, Nova Scotia, during the summer of 1915 [microform]. Lobster fisheries; Homards; Lobster culture; Homards; Lobsters; Homards. aa DEPARTMSyT OF THE \ArAL SOtVICB 8 GEORGE V, A. Itlft once. Of the 20,000 to ^"^.OOO fry which we tried to rear at a second trial, becinninc August 2, only 146 were alive on August 17, and these alao were all in the second stage. In the August rearing the larvie were shaded from the sunlight by heavy painted canvas screens lying close over the boxes; in July they were not The effect of the shading appeared t
. Report upon lobster investigations at Long Beach Pond, Nova Scotia, during the summer of 1915 [microform]. Lobster fisheries; Homards; Lobster culture; Homards; Lobsters; Homards. aa DEPARTMSyT OF THE \ArAL SOtVICB 8 GEORGE V, A. Itlft once. Of the 20,000 to ^"^.OOO fry which we tried to rear at a second trial, becinninc August 2, only 146 were alive on August 17, and these alao were all in the second stage. In the August rearing the larvie were shaded from the sunlight by heavy painted canvas screens lying close over the boxes; in July they were not The effect of the shading appeared to be to reduce the first stage from thirteen days to nine days, and to lessen the number of diatoms; but the larvK died jvst the same. It is, of course, true that the warmer water in August (about one degree) may have had more to do with the shortening of the first stage than the exclusion of light. Indeed, the influence of direct sunlight upon lame is still an open question. To be sure, the fry, when left to themselves, swim straight into the light, but it does not follow that because they do so, th»> r'^sult to themselves is necessarily Fig. S.—Showing the interior of the cemtnt pcnind. The six Uttioed oomi artmentH are for retaining lobsten ao that the; can be studied at cloae range. Leaving out for the prpscnt the influence of light, it may well be asked: "What favourable conditions exist at Wickford, that enable the operators there to raise 40 lier cent, of their fry to the crawling or fourth sta^c. which do not exist at Long Beach pond!" And the answer is: first, too slight a depth of water under our rearing boxes, thus favouring the entrance of mud and diatoms from the bottom; secondly, the presence in the water of an unusual number of diatoms not generally found in open sea-water;* thirdly, too low a temperature of water. While the temperature at Wickford varies during the rearing season from 68° to 75°, the mean average temper- ature at L
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjectlobsterfisheries
