Why are Aedes mosquitoes rare colonisers of Nepenthes pitcher plants?
MetadataShow full item record
1. Nepenthes pitcher plants produce fluid-containing animal traps that are colonised by a variety of specialised arthropods, especially dipterans. However, container-breeding vector mosquitoes, such as Aedes albopictus Skuse have rarely been recorded from pitchers. Increasing overlap in the geographical ranges of Nepenthes and Ae. albopictus in urban parts of Southeast Asia owing to urbanisation highlights a growing need to investigate the potential role of pitchers as larval habitats for vector mosquitoes. 2. The ability of Ae. albopictus larvae to survive in three common lowland Nepenthes in Peninsular Malaysia that are most likely to co-occur with Ae. albopictus [viz., Nepenthes ampullaria Jack, Nepenthes gracilis Korth., and Nepenthes mirabilis (Lour.) Druce] was investigated. 3. The larval survival rates of Ae. albopictus in pitcher fluids of the three Nepenthes species were determined, then the effects of low pH, larvicidal agents (such as microbes, predators, and chemical compounds) through manipulative experiments were investigated. 4. It was found that pitchers represent a hostile environment to Ae. albopictus, but that the principal cause of larval mortality varies among Nepenthes species (i.e. low fluid pH in N. gracilis, predation by Toxorhynchites acaudatus Leicester larvae in N. ampullaria, and microbial activity in N. mirabilis). It was concluded that Nepenthes pitchers are generally not suitable larval habitats for Ae. albopictus. However, the pitcher environment of N. ampullaria is worthy of further study, as pitchers that lack predators are nevertheless rarely colonised by Ae. albopictus, indicating that other aspects of the host pitcher environment inhibit oviposition or larval survivorship.
Showing items related by title, author, creator and subject.
McWilliam, P.; Phillips, Bruce (2007)This review outlines current knowledge of mechanisms effecting metamorphosis in decapod crustaceans and insects. The comparative approach demonstrates some of the complexities that need resolving to find an answer to the ...
An evaluation of the feeding regime for larval mahimahi (Coryphaena hippurus Linnaeus 1758) and cobia (Rachycentron canadum Linnaeus 1766)Nguyen, Van Tuan (2009)A series of five trials were conducted with an aim to evaluate the effects of different feeding regimes on the growth performance and survival of mahimahi and cobia larvae. The five feeding regimes were (1) delayed first ...
Changes in lipid and fatty acid composition of late larval and puerulus stages of the spiny lobster (Panulirus cygnus) across the continental shelf of Western AustraliaPhillips, Bruce; Jeffs, A.; Melville-Smith, R.; Chubb, C.; Nelson, M.; Nichols, P. (2006)The feeding of the late larval stages of the spiny lobster, Panulirus cygnus, and the energy reserves used by the non-feeding post-larvae for crossing the continental shelf of Western Australia were examined through their ...