Sponge aquaculture as an alternative means of income

Publié: 26 avril 2016
Dernière modification: 01 avril 2019

The cultivation of seaweed for the production of carrageenan, a thickener widely used in foods, has been a major source of income for Zanzibari women for more than 20 years. An analysis of the local conditions revealed that the cultivation of seaweed is subject to a sharp decline in production due to increasing occurrences of diseases and pests, and a low world-market price. Consequently, unmarried women with kids are no longer able to make a living from seaweed farming.

When searching for alternative means of income many aspects such as the know-how of the parties involved, eco friendliness, market-opportunities, investment requirements, general acceptance of the method, scalability, and availability of resources need to be considered. Aquaculture of sponges was identified to be a suitable alternative to seaweed farming promising substantially higher incomes.


Activités d'éducation, de formation et de renforcement des capacités
Évaluation, mesures d'efficacité et apprentissage
Financement durable
Moyens de subsistance durables
Échelle de la mise en œuvre
Phase de la solution
Phase de planification

Facteurs de réussite

  • The methods for cultivating sponges and seaweed share many aspects which made it easier to set-up sponge farms and train the women.
  • The shallow coastal waters are organised as common property and dedicated sites for sponge farms could be negotiated with the local fishers and communities.

Enseignements tirés

It was difficult to find women pioneering as sponge farmers willing to learn how to swim and to try something completely novel – a challenging task in Zanzibar’s traditional society.