Fenpyroximate (FP), an acaricide, is widely used in the prevention of acarids (mites) in fruit plant gardens. In this study, the acute toxic effects of sublethal concentrations of FP were investigated using adult guppy (Poecilia reticulata PETERS, 1859). Guppy adults were exposed to sublethal FP concentrations (15, 25, and 150 μgl) during 48 hours (n:10). Sublethal exposures were made according...

Mycobacterium fortuitum was isolated from 3 species of freshwater fish in South Africa for the first time. The bacterium was isolated from oscars, guppies and discus fish from different sources. Heavy mortalities as a result of infection with this bacterium were reported from a guppy farm and the multi-resistance of this isolate to antimicrobials rules out the treatment of infected fish.

Prior research has demonstrated a strong association between the species of predators that co-occur with guppies and the evolution of guppy life histories. The evolution of these differences in life histories has been attributed to the higher mortality rates experienced by guppies in high-predation environments. Here, we evaluate whether there might be indirect effects of predation on the evolu...

We study a nonlocal evolution equation generalising model introduced by Shigeru Kondo to explain colour patterns on skin of guppy fish. prove the existence stationary solutions using either bifurcation theory or Schauder fixed‐point theorem. also present numerical studies this and show that it exhibits similar those modelled well‐known reaction‐diffusion equations.

Opposite selection on behavioural types by active and passive fishing gears in a simulated guppy fishery B. Diaz Pauli1†, M. Wiech1, M. Heino1, 2, 3 and A. C. Utne-Palm1, 2 1 Department of Biology, University of Bergen, Norway 2 Institute of Marine Research, Bergen, Norway 3 International Institute for Applied Systems Analysis, Laxenburg, Austria † Author for correspondence. E-mail addresses: b...