E. Tyler, A. Manica, N. Jiddawi, M. Speight
Aquatic Conservation: Marine and Freshwater Ecosystems, 21(3), pp. 231-238, (2011)
Marine reserve, Partial protection, Community-based management, Beach seine, Dynamite, Fishing gear
Completely banning fishing from coral reefs is now
accepted to have significant benefits for marine biodiversity and in
many cases, fisheries. However, the benefits of regulating fishing on
coral reefs, by restricting the methods used, or the total amount of
fishing, are less well understood, even though such regulations are much
more likely to be supported by fishermen.
study assesses whether banning illegal, destructive fishing methods and
reducing the numbers of fishermen visiting from outside an area
benefits a coral reef fishery, despite unregulated fishing by local
fishermen using non-destructive methods.
abundance, biomass, mean length, and species richness of nine
commercially important fish families are compared across ten independent
patch reefs inside and outside the 470 km2 Menai Bay Conservation Area in Zanzibar, Tanzania.
after taking into account the effect of differences in habitat and the
distance between reefs, 61% (±19.7%) more fish species were found in
regulated than unregulated reefs. Fish abundance, biomass, and length
were not affected, suggesting that banning destructive fishing may
improve biodiversity, but that further regulations may be required to
improve fish stocks.