Growth and reproductive performance of American cockroach (Periplaneta americana) as affected by photoperiod and feed type

Abstract

American cockroach is a reliable source of protein as an animal feed but remains unexploited. Little is known on the right combination of environmental factors for their mass production under artificial conditions. This study assessed the effect of photoperiod and feed as key factors in cockroach rearing on their growth and reproductive performance. Factorial experiment with two factors: photoperiod at four levels; 3L:21D, 6L:18D, 12L:12D, and 18L:6D, and feed at two levels (Chick mash, and chick mash + carrot) was designed. The experiment was laid in a split-plot design with photoperiod as the main plot factor and feed as the sub-plot factor. Measurements were taken on a weekly basis for growth parameters (body mass, body length and cephalic length), and reproductive parameters (length of the ootheca, number of eggs per ootheca and weight of the ootheca) throughout the feeding period. Photoperiod significantly affected the body mass (p