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BIBTEX RIS

Predation of Biomphalaria glabrata during the development of Belostoma anurum (Hemiptera, Belostomatidae)

1993; UNIVERSIDADE DE SÃO PAULO; Volume: 35; Issue: 5 Linguagem: Inglês

10.1590/s0036-46651993000500004

ISSN

1678-9946

Autores

Marcos H. Pereira, R.E. Silva, A. Azevedo, Alan Lane de Melo, L.H. Pereira,

Tópico(s)

Insect Resistance and Genetics

Resumo

Belostoma anurum was reared under laboratory conditions. Specimens were exposed to semi-natural conditions of photo period. The mortality rate was 26.3% during the post embryonic period (38.6 ± 0.7 days). During this time the average predation of Biomphalaria glabrata was of 99.0 ± 9.4 snails. The mean increment ratio of length and dry weight per instar was of 1.4 ± 0.1 and 2.8 ± 0.5, respectively. The predation by B. anurum adults can be divided into two different periods: phase I (4.8 ± 1.4 snails/day) and phase II (1.8 ± 0.5 snails/day). The higher predation in phase I suggested the sexual maturation of the belostomatid.

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