Tadele Y Egu | Hawassa College of Teacher Education, Ethiopia (original) (raw)

Papers by Tadele Y Egu

Research paper thumbnail of Shimelis Thesis final version

Research paper thumbnail of Hydra effects in stable food chain models with intraspecific competitions among specialist top predators

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.

Research paper thumbnail of ASSESSMENT OF STUDENTS DROPOUT IN SIDAMA ZONE SECONDARY SCHOOLS

Drafts by Tadele Y Egu

Research paper thumbnail of Effects of leadership skills in organizational control

Research paper thumbnail of Tadele Yonas Egu MSc Thesis

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.

Research paper thumbnail of Tadele thesis new

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.

Research paper thumbnail of Hydra effects in stable food chain models with Holling type response functions

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.

Research paper thumbnail of Shimelis Thesis final version

Research paper thumbnail of Hydra effects in stable food chain models with intraspecific competitions among specialist top predators

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.

Research paper thumbnail of ASSESSMENT OF STUDENTS DROPOUT IN SIDAMA ZONE SECONDARY SCHOOLS

Research paper thumbnail of Effects of leadership skills in organizational control

Research paper thumbnail of Tadele Yonas Egu MSc Thesis

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.

Research paper thumbnail of Tadele thesis new

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.

Research paper thumbnail of Hydra effects in stable food chain models with Holling type response functions

The hydra effect refers to the fact where increasing mortality rate on a population enhances its ... more The hydra effect refers to the fact where increasing mortality rate on a population enhances its own stock. In this study, we propose a dynamical system model of food chain with stable steady state, and analyze the variation of population biomass of targeted species with increasing mortality where the response function is Holling type III, II and III (Mixed). Furthermore, intra-specific competition among specialist top predator population is also included in the latter one and the effect of harvesting is studied in this mathematical model. We use Routh-Hurwitz stability conditions to analyze the local stability of coexistence equilibrium point. Propositions on local stability of the coexistence equilubrium point is shown for both tritrophic and four trophic level food chain models. Basically, in this research, it is shown in a stable food chain model whether density of a species increases in response to greater mortality when (a) Prey, intermediate predator, top predator in a tritrophic system is harvested or not.