Ontogenic shifts in predatory roles involving two invasive species

Involving Two Species

The Lie point symmetries of a coupled system of two nonlinear differential-difference equations are investigated. It is shown that in special cases the symmetry group can be infinite dimensional, in other cases up to 10 dimensional. The equations can describe the interaction of two long molecular chains, each involving one type of atoms. PACS: 02.20.-a,05.45.-a,34.10.+x,45.05.+x [email protected]....

Invasive predatory crayfish do not trigger inducible defences in tadpoles.

Invasive species cause deep impacts on ecosystems worldwide, contributing to the decline and extinction of indigenous species. Effective defences against native biological threats in indigenous species, whether structural or inducible, often seem inoperative against invasive species. Here, we show that tadpoles of the Iberian green frog detect chemical cues from indigenous predators (dragonfly ...

Symmetries of discrete dynamical systems involving two species

Functional Diversification within a Predatory Species Flock

Ecological speciation is well-known from adaptive radiations in cichlid fishes inhabiting lentic ecosystems throughout the African rift valley and Central America. Here, we investigate the ecological and morphological diversification of a recently discovered lotic predatory Neotropical cichlid species flock in subtropical South America. We document morphological and functional diversification u...

Two Cases of Invasive Pulmonary Aspergillosis in an Iranian Family

SUMMARY Aspergillosis is an infectious disease caused by genus aspergillos species. Aspergilli are ab undant in the environment, they Jive in soil as saprophyte deriving nutrient, from dead plants and animal matters. The genus aspergillos in characterized by the formation of distinctive conidiophores giving rise to conidias which can spread by air and are able to reside on the body surface spe...