title: Can Fishing Pressure Invert the Outcome of Interspecific Competition? The Case of the Thiof and of the Octopus Along the Senegalese Coast.
abstract: We present a mathematical model of two competing marine species that are harvested. We consider three models according to different levels of complexity, without and with species refuge and density-independent and density-dependent species movement between fishing area and refuge. We particularly study the effects of the fishing pressure on the outcome of the competition. We focus on conditions that allow an inferior competitor to invade as a result of fishing pressure. The model is discussed in relationship to the case of the thiof and the octopus along the Atlantic West African coast. At the origin, the thiof was abundant and the octopus scarce in that region. Since, the fishing pressure has strongly increased in some fishing areas leading to the depletion of the thiof and the invasion of its competitor, the octopus.
authors: School of Applied Mathematics and Informatics, Hanoi University of Science and Technology, No. 1 Dai Co Viet Street, Hai Ba Trung District, Hanoi, Vietnam.
authors: Thuy
authors: T
authors: Nguyen-Phuong
authors: Faculty of Computer Science and Engineering, Thuyloi University, No. 175, Tay Son Street, Dong Da District, Hanoi, Vietnam. doanhbondy@gmail.com.|UMI 209 UMMISCO, IRD/UPMC Paris 6, 32 Avenue Henri Varagnat, 93143, Bondy Cedex, France. doanhbondy@gmail.com.
authors: Doanh
authors: D
authors: Nguyen-Ngoc
authors: Univ Paris 06, Sorbonne Universités, IRD, UMI 209, UMMISCO, Bondy, France.|Université Cheick Anta Diop, UMI 209 IRD UMMISCO-UCAD, Dakar, Senegal.
authors: Pierre
authors: P
authors: Auger
authors: University Cheikh Anta Diop, FASEG-LMDAN, Dakar, Senegal.
authors: Sidy
authors: S
authors: Ly
authors: Institut de Recherche pour le Développement (IRD), UMR 248 MARBEC, LABEP-AO (IRD-IFAN), BP 1386, Dakar, Senegal.
authors: Didier
authors: D
authors: Jouffre
mesh_terms: D000818:Animals; D003163:Competitive Behavior; D005398:Fisheries; D005399:Fishes / Q000145:classification* / Q000502:physiology*; D008962:Models, Theoretical; D049831:Octopodiformes / Q000502:physiology*; D011157:Population Dynamics; D012675:Senegal
keywords: Competition; Density-dependent migration; Density-independent migration; Fishing pressure; Refuge