Aquat. Living Resour.
Volume 23, Number 4, October-December 2010
|Page(s)||387 - 398|
|Published online||04 February 2011|
Resource degradation of the sea cucumber fishery in Zanzibar, Tanzania: a need for management reform
Department of Systems Ecology, Stockholm University,
2 Institute of Marine Science, University of Dar es Salaam, Mizingani Rd., PO Box 668, Zanzibar
3 Stockholm Resilience Centre Stockholm University, Kräftriket 2B, 10691 Stockholm, Sweden
a Corresponding auteur:
Accepted: 29 November 2010
This study assessed the Zanzibar sea cucumber fishery using a multidisciplinary approach. Data was collected by (i) interviewing various groups of actors in the fishery and reviewing management documentation and legislation, (ii) by monitoring catches and (iii) through a visual census of coastal sea cucumber populations in areas open and closed to fishing. The fishery showed clear signs of being unsustainable with high fishing effort, and weak formal and informal management institutions. The fishery operation was characterised by an intricate cross-scale structure with both fishers and sea cucumber products being transported across national borders. The visual census of commercial sea cucumber stocks at three sites open to fishing around Zanzibar showed low densities across the range of sea cucumber value groups including low value species. Furthermore, the diversity of commercial sea cucumber species was lower in fished reefs than on a protected reef. The poor status of the sea cucumber populations was confirmed by the perception of an overfished resource by the interviewed actors active in the fishery. This was also depicted by the paucity of high value species, and high representation of low value and newly commercialised species in fishers catch. We conclude that the current state of Zanzibar’s sea cucumber populations is compromising the fisheries self-replenishment and existence and that the fishery is in urgent need of a complete management reform.
Key words: Bêche-de-mer / Fisheries / Overfishing / Holothurians / Echinoderms / Trepang / Western Indian Ocean
© EDP Sciences, IFREMER, IRD 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.