Nguyen-Phuong T., Nguyen-Ngoc Doanh, Auger Pierre, Ly S., Jouffre Didier. (2016). Can fishing pressure invert the outcome of interspecific competition ? The case of the thiof and of the octopus along the Senegalese coast. Acta Biotheoretica, 64 (4), p. 519-536. ISSN 0001-5342.
Titre du document
Can fishing pressure invert the outcome of interspecific competition ? The case of the thiof and of the octopus along the Senegalese coast
Acta Biotheoretica, 2016,
64 (4), p. 519-536 ISSN 0001-5342
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.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Ressources halieutiques [040]
