Predation of Biomphalaria glabrata during the development of Belostoma anurum (Hemiptera, Belostomatidae) Predação de Biomphalaria glabrata durante o desenvolvimento de Belostoma anunan (Hemiptera, Belostomatidae)

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 m...

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Bibliographic Details
Published in:Revista do Instituto de Medicina Tropical de São Paulo
Main Authors: M.H. Pereira, R.E. Silva, A.M.S. Azevedo, A.L. Melo, L.H. Pereira
Format: Article in Journal/Newspaper
Language:English
Published: Universidade de São Paulo (USP) 1993
Subjects:
Insecta
Belostomatidae
Belostoma anurum
Predation
Biomphalaria glabrata
Arctic medicine. Tropical medicine
RC955-962
Infectious and parasitic diseases
RC109-216
Arctic
Online Access:https://doi.org/10.1590/S0036-46651993000500004
https://doaj.org/article/6573b052d125445cae7a0e312a736727
Description
Summary: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. Belostoma anurum foi criada no laboratório em condição semi-natural de fotoperíodo. A taxa de mortalidade durante o período pós-embrionário (38,6 ± 0,7 dias) foi de 26,3%. Durante este período a predação média de B. glabrata foi de 99,0 ± 9,4 caramujos. A média de incremento de comprimento e de peso seco por estádio ninfal foi de 1,4 ± 0,1 e 2,8 ± 0,5, respectivamente. A predação por adultos de B. anurum pode ser dividida em duas fases significativamente distintas: fase I (4,8 ± 1,4 caramujos/dia) e fase II (1,8 ± 0,5 caramujos/ dia). A maior predação verificada na fase I deve-se provavelmente à maturação sexual do belostomatídeo.

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