I 
B 
Figure 19-1. Predation tank and inflow funnel (A) and (B) 
Observation Bench, front and side view (normally covered 
with black plastic). 
Thermal Shock Procedures 
Larval Menidia menidia were transferred in 100 ml polypropylene beakers 
with a horizontal slit 1 cm x 2 cm wide cut 1 cm above the bottom, and 
covered with 240 u nylon screening. Larvae were placed into the beakers in 
groups of 10, four hours prior to a test and maintained at ambient water 
temperature (20.5 ± 0.7°C). For the shock tests, a seawater bath was preheated 
292 
