Estadisticas vitales de Rhodnius neivai Lent, 1953 (Hemiptera: Reduviidae) en condiciones experimentales

Abstract

A statistical evaluation of the population dynamics of R. neivai is based on six cohorts experiments conducted under controlled laboratory conditions. Two blood sources were offered to animals: rabbit and hen. Egg hatching, nymphal development time and mortality, adult longevity and age-specific mortality, female age-specific fecundity and fertility were determined. In addition, some population parameters were evaluated, such as: life expectancy, intrinsic rate of natural increase, net reproduction rate, finite rate of increase, reproductive value and stable age distribution. Life cycle was longer in the animals fed on rabbit, nymphal survival was slightly higher in the individuals fed on hen. Age of first reproduction was lower in the insects fed on hen, but reproductive output and total number of reproductive weeks were greater in the cohorts fed on rabbit. Intrinsic and finite rate of increase were greater in the animals fed on hen. Generation time was slightly greater in the cohorts fed on rabbit. Net reproduction rate was similar on both blood sources, although it was slightly bigger in the individuals fed on rabbit. Reproductive value in the insects fed on rabbit was twice as much as the registered in the animals fed on hen.

Vital Statistics of Panstrongylus geniculatus (Latreille 1811) (Hemiptera: Reduviidae) under Experimental Conditions

“…The statistics of reproduction characteristics and its comparisons with other species are summarized in Table IV. The interval between entering the adult stage and first laying was two weeks, these results are in line with the indicated for others species of triatomines: between 9 days and 4 weeks after its entering to the adult stage (Rabinovich 1972a,b, Feliciangeli & Rabinovich 1985, Cabello et al 1987.…”

“…In terms of absolute mortality all our results showed figures smaller than the indicated for other species of triatomines (Rabinovich 1972a, Feliciangeli & Rabinovich 1985, Cabello et al 1987.…”

“…Maximum and mean longevity were greater for males than for females in agreement with the registered for most species of triatomines (Rabinovich 1972a, Feliciangeli & Rabinovich 1985, Cabello et al 1987.…”

“…The average incubation period, 21.3±2.7 days was shorter than the 25.1 days egg developmental time for P. geniculatus obtained by Galíndez (1990), but is a little higher than the indicated for some other species of triatomines: 19.8 days in Triatoma infestans (Rabinovich 1972a); 19.1 days in T. maculata (Feliciangeli & Rabinovich 1985); 19.9 days in Rhodnius neivai (Cabello et al 1987); 18 days in R. prolixus, 21.1 days in R. pictipes (Lent & Valderrama 1977).…”

Influence of the blood meal source on the biology of Meccus picturatus Usinger 1939 (Hemiptera: Reduviidae: Triatominae) under laboratory conditions

“…were shorter on cohorts reared on mammals (mice) than on those reared on birds (chicken, pigeons or hens). However, Cabello et al (1987) reported a longer life cycle of Rhodnius neivai fed on rabbits than fed on hens. In the current study, the average development time of the cohorts of M. picturatus fed on hens (196.8 ± 15.8 days) and fed on rabbits (189.5 ± 22.9 days) were not significantly (P > 0.05) different.…”