Since the Rio Convention in 1992, there has been a strong political and ethical imperative to link biodiversity conservation and equity and to promote gender-sensitive policies. However, there has also been a huge gap between these global injunctions and local actions. Mangrove conservation policy is a good illustration of "nature grabbing," which leads to environmental violence. This paper explores the perspectives of the fisherwomen who inhabit the mangroves. It analyzes their struggle to maintain control over mangrove resources and spaces in the face of private or public forces seeking to commodify them in the name of conservation. Based on a corpus of ethnographic data collected over more than 40 years, the paper focuses on the narratives of the oyster fisherwomen in Basse-Casamance, Senegal. It highlights their individual, family, and collective strategies in three time periods: the 1980s, the 2000s and the 2020s, demonstrating their resistance over time, defensively or offensively, to the consequences of globalization. The paper shows the ability of the women to preserve their heritage and empower themselves, notably thanks to their self-organization and mutual support. The paper concludes with the scientific uncertainties regarding mangrove dynamics and the conflictual visions on the future of the mangrove socio-ecosystem at diverse scales.