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Friends of the Sea. Certifiers are major facilitators of knowledge moving from the

realms of FAO into the far corners of the world via the fisheries they certify and their

certified products. Eco-certified products are also market devices. Along with

sustainability guides, they reconfigure the consumption of seafood and articulate what

is and therefore what is not sustainable.

In summary, sustainability knowledge encompasses the capacity to measure

what is and is not sustainable. The knowledge network is made in spaces such as

those I have just described, where knowledge is produced and reproduced. Such

networks respond to crises and are also mediums through which knowledge

circulates. Sustainability/market devices are mechanisms of this network, offering

further opportunity for sustainability discourses to be enacted.

Conclusion

As we have seen in this chapter, when we understand the relationship of knowledge

production to the rules of knowledge at a particular time and in a particular social

situation, then power takes on a productive form. That is, existing conditions make it

possible for some practices and knowledge to, as Canguilhem outlined, ‘extend’,

opening up spaces for new forms of knowledge production (in Bove` 1995, p. 55).

Bove` suggests that this is:

…control by the power of positive production: that is a kind of power that
generates certain kinds of questions; a kind of power, placed within
systems that legitimate, support, and answer those questions, a kind of
power that, in the process, includes within its system all those it produces
as agents capable of acting within them. (1995, p. 54)

In this passage Bove` situates power not as a conscious act of repression but a making

possible, an opening up of specific fields of possibility that ‘constitutes entire

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