70
VICTOR L. LOOSANOFF AND HARRY C. DAVIS
averaged only 148 p. The two other cultures, containing twenty-six
and fifty-two larvae and given 400000 and 800000 Chlordh cells
per ml, died within a few days. This and similar experiments showed,
therefore, that crowding of larvae beyond certain limits cannot always
D
FIG. 25. Forty-elght-hour larvae of Mereenaria mercenaria developing from egg8
cultured at different denaities. A, 250 eggs per milliliter of water ; R, 500 egg6 per
ml ; C, 1000 eggs per ml ; and D, 3000 eggs per ml.
be remedied by a proportional increase in quantity of food. It w88
also demonstrated that lethal concentrations of food organisms, 88
was the case when 400 000 and 800 000 cells of ChkweUu per ml were
given, cannot always be reduced to a safe level by the large number
of larvae that presumably would rapidly consume these cells.
VICTOR L. LOOSANOFF AND HARRY C. DAVIS
averaged only 148 p. The two other cultures, containing twenty-six
and fifty-two larvae and given 400000 and 800000 Chlordh cells
per ml, died within a few days. This and similar experiments showed,
therefore, that crowding of larvae beyond certain limits cannot always
D
FIG. 25. Forty-elght-hour larvae of Mereenaria mercenaria developing from egg8
cultured at different denaities. A, 250 eggs per milliliter of water ; R, 500 egg6 per
ml ; C, 1000 eggs per ml ; and D, 3000 eggs per ml.
be remedied by a proportional increase in quantity of food. It w88
also demonstrated that lethal concentrations of food organisms, 88
was the case when 400 000 and 800 000 cells of ChkweUu per ml were
given, cannot always be reduced to a safe level by the large number
of larvae that presumably would rapidly consume these cells.