Estudos bionômicos de Dipetalogaster maximus (Uhler, 1894) (Hemiptera - Triatominae): II - Influência da dieta sobre o ciclo biológico e resistência ao jejum

Abstract

Avaliou-se a influência de dois tipos de dieta na cronologia da ontogênsese de Dipetalogaster maximus. Alimentou-se um grupo em sangue de camundongos normais (C) e outro em sangue de pombos (P). Ambos foram mantidos em estufa B.O.D. a 28ºC e 65% U.R. O grupo alimentado em C, atingiu a fase adulta com X=130,1 dias e o grupo alimentado em P com X=145,68 dias. A percentagem total de mortalidade foi significativamente superior nos alimentados em P (63,71%) em relação aos alimentados em C (31,18%). Quanto á resistência ao jejum, o período de sobrevivência foi acentuadamente maior para o grupo alimentado em C. Principalmente nos 3º, 4º e 5º estádios. Estas observações complementam nossos registros anteriores desta espécie, mantida nas mesmas condições, sobre: fertilidade das fêmeas, ritmo de postura, viabilidade dos ovos e curva da mortalidade x fertilidade.

Morphology, Life Cycle, Environmental Factors and Fitness – a Machine Learning Analysis in Kissing Bugs (Hemiptera, Reduviidae, Triatominae)

“…There is always a decrease in development time with an increase of a constant temperature: the developmental cycle (egg to adult) lasted 602 days at 25 • C and 186 days at 30 • C in Triatoma jurbergi (Carcavallo, Galvão & Lent, 1998) (Gomes and da Silva, 2002); the developmental cycle of D. maximus (Uhler, 1894) was 271 and 177 days at constant temperatures of 25 and 30 • C, respectively (Da Silva, 1990), a difference of 53.1%; however, for Triatoma infestans (Klug, 1834) the difference was smaller (35.9%), also between 25 (271 days) and 30 • C (177 days) (Da Silva and Da Silva, 1988). Cabello (1999) rearing R. neivai at three constant temperatures (22, 27, and 32 • C), found a non-linear relationship of total adult mean longevity (24.6, 36.6, and 16.7 days) and life expectancy when entering adult stage (21, 34, and 20.7 Reproduction is also affected by temperature in triatomines, although Da Silva (1990) found only a small difference (11.4%) in the total number of eggs laid by females of D. maximus in their first 30 days of adult life: 29.1 and 26.1 eggs at 25 and 30 • C, respectively; however, under the same conditions, Da Silva and Da Silva (1988) found that in T. infestans this difference was twice as large (22.5%). In R. neivai Cabello (1999) found that the average number eggs/female/week were 11.1, 14.5, and 17.7, and the average number of eggs per female per lifetime were 264, 724, and 603, for three constant temperatures (22, 27, and 32 • C), respectively.…”

Cytotaxonomy of Dipetalogaster maxima Uhler, 1894 (Hemiptera, Reduviidae, Triatominae)

“…This triatomine is exclusive to Mexico (Galvão et al, 2003) and is a potential vector of Chagas disease, because has been found infected by the protozoan Trypanosoma cruzi (Chagas, 1909), in natural environments (Jimenez et al, 2003) and occasionally in rural households and peripheral areas (Lent and Wygodzinsky, 1979;Estrada et al, 1995). Costa et al (1986Costa et al ( , 1987Costa et al ( , 1992 performed bionomic studies and analyzed the population dynamics and the influence of diet on several factors such as rhythm and posture, egg viability, fertility curve, female mortality, resistance to fasting and biological cycle.…”

Ontogenetic changes in wild chagasic bugs (Dipetalogaster maximus): exploring morphological adaptations in pre-adult and adult stages

“…obs.) and lizards (Jiménez & Palacios, 1999;Jiménez et al, 2003;Marsden et al, 1979), although it can feed on pigeons in insectary conditions (Costa et al, 1987). Nevertheless, information on the biology of this species from wild specimens is extremely fragmented (Guzmán-Bracho, 2001;Ryckman & Ryckman, 1967).…”