This separation of activities is maintained through norms of femininity and masculinity: women's fishing work is often conceptualized as "not fishing", as if this work were an extension of their traditional role of (unpaid) household labour (SPC 2007). The association of fishing from boats, especially on open seas, with maleness is supported by cultural practices and taboos around the world with respect to women in boats (Lambeth et al. The sex segregation of fishing is not merely the result of gender boundaries: in fishing communities fishing defines these boundaries (Yodanis 2000).