Three five acre exclosures were established in 1964 to monitor
vegetational regeneration and forage productivity on a coniferous
forest site in northeastern Oregon which was clear-cut in 1963, broadcast
burned and seeded in 1964. Fence design and construction to
facilitate controlled early summer cattle grazing trials was completed
by 1965....
Sixteen populations of guppies (Poecilia reticulata) were established
in laboratory aquariums. Eight populations were exposed to
dieldrin at a mean concentration of 0.525 ppb in the water and 2.11
ppm in the food, tubificid worms. Eight populations received control
water and food. All populations were fed three grams of tubificid...
