Photoperiod controls the duration of both the fourth and fifth
stadia in Agalliopsis abietaria Oman. Development was arrested in
the fourth stadium unless short days were given during the second
and third instars; a short arrest of development occurred if the short
days did not begin until the fourth instar....
In an effort to enhance the possibilities of commercially rearing crayfish (Pacifastacus trowbridgii), the subyearling segment of the life cycle was examined to determine practical ways of increasing survival and growth. Four experiments were designed to study the effects of water velocity, photoperiod, substrate and density of stocking on the...
Quantization is a non-linear operation of converting a continuous
signal into a discrete one, assuming a finite number of levels N. A
study is made of the quantization procedure, starting from the year
1898 to the present time. Conditions for minimum error are derived
with consideration of quantization in magnitude...