We first present a predator-prey model for two species and then extend the model to three species where the two predator species engage in mutualistic predation.Constant effort harvesting and the impact of by-catch issue are also incorporated.Necessary sufficient conditions for the existence and stability of positive equilibrium points are examined
Contemporary companies operate in a state of perpetual changes, adopting to them or exceeding them, striving for the ideal state.At the organisational level, they ensure not only survival, but also undisturbed development.The model of functioning that is most closely reflected in such an endeavour is an organisation in which such scientific discipl
Abstract Background click here The development of a second primary tumor is a potential late side effect of radiotherapy.Particularly, an increased risk of secondary cancers, mostly of digestive or breast origin, has been observed in patients treated with high-dose radiotherapy for Wilms tumor (WT) in childhood.However, hepatocellular carcinoma (HC
Indo-Pacific humpback dolphins (Sousa chinensis) were estimated with the Mark-Recapture Model from a boat-based photo-identification survey at Khanom, Nakhon Si Thammarat, Thailand from July 2008 - June 2009.Indo-Pacific humpback dolphins were encountered at a water depth of 1.1 - 7.5 m, a distance off shore of 21 - 1,021 m and water transparency o