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          Institute: MPI für Evolutionsbiologie     Collection: Tropical ecology     Display Documents

ID: 65162.0, MPI für Evolutionsbiologie / Tropical ecology
Survival strategy of the bombardier beetle, Pheropsophus rivieri (Col.: Carabidae) in a Central Amazonian blackwater floodplain (Brazil)
Authors:Zerm, Matthias; Adis, Joachim
Date of Publication (YYYY-MM-DD):2003-12
Title of Journal:Amazoniana
Issue / Number:3/4
Start Page:503
End Page:508
Review Status:not specified
Audience:Not Specified
Abstract / Description:Terrestrial invertebrates in the Central Amazonian floodplains have to cope with an annual inundation period of several months. Their life cycles are affected by this flood pulse, and most species have adopted seasonal univoltine reproductive regimes as a common survival strategy. We followed the phenology of adult bombardier beetles, Pheropsophus rivieri, at a blackwater river beach near Manaus/Brazil during 1997-1999. Gonad maturity was examined in female beetles. Adult beetles showed a pronounced seasonal activity pattern with the reproductive period confined to the first three months of falling water levels. It is concluded that P. rivieri has a seasonal, univoltine. and presumably semelparous life cycle, driven by the flood pulse. The presence of fat bodies in immature females during rising water levels indicates a delayed gonad maturation or gonad dormancy. The species exhibits a migratory survival strategy, typical for most carabid species from Central Amazonian floodplains, although it remained unsolved where adults pass the period of rising water levels. A possible parasitic relation of larval P. rivieri with mole crickets is discussed
Free Keywords:life cycle; seasonality; flood pulse; activity pattern; gonad state; Amazon
External Publication Status:published
Document Type:Article
Communicated by:Pia Parolin
Affiliations:MPI für Limnologie/AG Tropenökologie
Identifiers:ISSN:0065-6755 [ID-No: 1]
LOCALID:2264/S 38122 [Listen-Nummer/S-Nummer]
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