Immunoreactive progesterone concentration in some tissues of the cockroach Nauphoeta cinerea (Blattodea: Panchloridae) during development

The levels of progesterone radioimmunoassay-positive material in the gonads, intestine and haemolymph of the cockroach Nauphoeta cinerea during adult ontogenetic development were studied. The animals were divided into two groups: group 1 - control males and females reared for a period of 36 days after adult ecdysis at temperature 29 ± 1°C; group 2 - experimental males and females reared from day 8 to day 18 at 15°C and then at the same temperature as cockroaches of group 1. The immunoreactive progesterone concentration in gonads and intestine of females from group 1 reached the highest value on day 24 and 27. In females from group 2, the progesterone peak shifted to days 35-38. Females from group 1 gave birth to nymphs on day 36, females of group 2 on days 42-45. In males of group 2, a similar shift of the progesterone peak was observed.