[Defecation index and reproductive success of Triatoma maculata (Hemiptera: Reduviidae) under laboratory conditions]. / Indice de defecación y éxito reproductivo de Triatoma maculata (Hemiptera: Reduviidae) en condiciones de laboratorio.
Rev Biol Trop
; 52(4): 927-30, 2004 Dec.
Article
em Es
| MEDLINE
| ID: mdl-17354403
The reproductive and defecating behavior of Triatoma maculata (Erichson 1848) was studied on animals from an university culture in Venezuela. This species does not reach the importance of Rhodnius prolixus Stal 1859 as Chagas disease vector in Venezuela. This study addressed the role of defecating frequency, an index of how dangerous the animals are for the human population, and its relationship with why T. maculata is a less important vector than R. prolixus. Human blood was fed to the insects through an artificial feeding device. The 2nd and 3rd instar nymphs defecated more frequently (Id= 0.6, n=40), and our Vth instar nymphs did not complete sexual differentiation. Fertility was 55% (n=865) and fecundity 8 eggs/female/week (n=26). Egg incubation lasted 22 days (n=477). Female longevity was 51 days (n=26). Intermould time grew progressively from 35 days for 1st to 40 days for 4th instar nymphs (n=40). Mould percentage varied from 0% for Vth to 63% for 3rd instar nymphs. Mortality varied from 8% for 3rd to 100% for Vth instar nymphs. These results support evidences explaining the lesser vectorial capacity and low density of T. maculata in human domiciles, including reduced reproduction and defecation when the animal feeds on human blood.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Triatoma
/
Doença de Chagas
/
Defecação
/
Comportamento Alimentar
/
Insetos Vetores
Tipo de estudo:
Prognostic_studies
Limite:
Animals
/
Female
/
Humans
/
Male
País/Região como assunto:
America do sul
/
Venezuela
Idioma:
Es
Revista:
Rev Biol Trop
Ano de publicação:
2004
Tipo de documento:
Article
País de publicação:
Costa Rica