AIR 
INFLOW 
SEAWATER 
INFLOW 
Figure 14-2. The 12 C Hatching Jar System Used to Culture 
Juvenile and Adult Grass Shrimp, Palaemonetes vulgaris. 
NOTE: 6 and 48 £ sizes are identical in design. 
was used for 14 weeks, during which time a combination of thawed and live 
juvenile brine shrimp were fed in excess, with unconsumed food removed by 
siphon once each week. 
All grass shrimp were transferred from the 20 £ jar at age 17 weeks. Of these 
shrimp, 40 were used in a diet study, and the remaining 66 were placed in a 48 
£ hatching jar scaled-up version of the 20 £ size (Figure 14-2). In the diet study, 
40 shrimp were divided evenly between two 4 2 systems resembling that shown 
in Figure 14-1. One group of 20 shrimp was reared on lab-reared Artemia 
adults while the other group was fed 243 400 jum pieces of the commercial 
flake Fish food Tetra Marin. Animals were fed daily in excess. Growth in 
carapace length, survival, and the incidence of ovigerous females were 
considered in determining the suitability of each diet. 
209 
