Changes in northern Tanzania coral reefs during a period of increased fisheries management and climatic disturbance
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Published source details
McClanahan T.R., Muthiga N.A., Maina J., Kamukuru A.T. & Yahya S.A.S. (2009) Changes in northern Tanzania coral reefs during a period of increased fisheries management and climatic disturbance. Aquatic Conservation: Marine and Freshwater Ecosystems, 19, 758-771.
Published source details McClanahan T.R., Muthiga N.A., Maina J., Kamukuru A.T. & Yahya S.A.S. (2009) Changes in northern Tanzania coral reefs during a period of increased fisheries management and climatic disturbance. Aquatic Conservation: Marine and Freshwater Ecosystems, 19, 758-771.
Actions
This study is summarised as evidence for the following.
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Cease or prohibit all types of fishing in a marine protected area Action Link |
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Cease or prohibit all types of fishing in a marine protected area
A site comparison study in 2004–2005 at three island coral reef sites in the Indian Ocean, off Tanzania (McClanahan et al. 2009) found that a small marine protected area where all fishing had been prohibited for 13 years had a greater fish biomass compared to areas that have no fishing restrictions. Fish biomass was greater in the area that prohibited fishing (886 kg/ha) than two nearby areas where fishing is allowed (283 and 291 kg/ha). The privately owned Chumbe Island Coral Park off Zanzibar was established in 1991 (0.3 km2, all extractive activities prohibited). In 2004–2005, fish were surveyed by underwater visual census (5 × 100 m belt transects) at two sites inside the protected area and two fished sites with no management 20 km away. Fish >3 cm were recorded by family group and 10 cm size categories, and biomass estimated from length–weight relationships.
(Summarised by: Khatija Alliji)
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