Helber, S. B. de Voogd, N. J. Muhando, C. A. Rohde, S. and Schupp, P. J. 2016. Anti-predatory effects of organic extracts of 10 common reef sponges from Zanzibar. Hydrobiologia,
Plass-Johnson, Jeremiah G. Heiden, Jasmin P. Abu, Nur Lukman, Muhammad and Teichberg, Mirta 2016. Experimental analysis of the effects of consumer exclusion on recruitment and succession of a coral reef system along a water quality gradient in the Spermonde Archipelago, Indonesia. Coral Reefs, Vol. 35, Issue. 1, p. 229.
Condy, Michelle Cinner, Joshua E. McClanahan, Tim R. and Bellwood, David R. 2015. Projections of the impacts of gear-modification on the recovery of fish catches and ecosystem function in an impoverished fishery. Aquatic Conservation: Marine and Freshwater Ecosystems, Vol. 25, Issue. 3, p. 396.
Roos, Natalia C. Carvalho, Adriana R. Lopes, Priscila F.M. and Pennino, M. Grazia 2015. Modeling sensitive parrotfish (Labridae: Scarini) habitats along the Brazilian coast. Marine Environmental Research, Vol. 110, p. 92.
Young, Matthew A. L. Foale, Simon and Bellwood, David R. 2015. Dynamic catch trends in the history of recreational spearfishing in Australia. Conservation Biology, Vol. 29, Issue. 3, p. 784.
Alonso Aller, Elisa Gullström, Martin Eveleens Maarse, Floriaan K J Gren, Michaela Nordlund, Lina Mtwana Jiddawi, Narriman and Eklöf, Johan S. 2014. Single and joint effects of regional- and local-scale variables on tropical seagrass fish assemblages. Marine Biology, Vol. 161, Issue. 10, p. 2395.
Bonaldo, Roberta Hoey, Andrew and Bellwood, David 2014. Oceanography and Marine Biology.
Campbell, S. J. Mukminin, A. Kartawijaya, T. Huchery, C. and Cinner, J. E. 2014. Changes in a coral reef fishery along a gradient of fishing pressure in an Indonesian marine protected area. Aquatic Conservation: Marine and Freshwater Ecosystems, Vol. 24, Issue. 1, p. 92.
Gomes, Ines Erzini, Karim and McClanahan, Timothy R. 2014. Trap modification opens new gates to achieve sustainable coral reef fisheries. Aquatic Conservation: Marine and Freshwater Ecosystems, Vol. 24, Issue. 5, p. 680.
Manikandan, B. Ravindran, J. Shrinivaasu, S. Marimuthu, N. and Paramasivam, K. 2014. Community structure and coral status across reef fishing intensity gradients in Palk Bay reef, southeast coast of India. Environmental Monitoring and Assessment, Vol. 186, Issue. 10, p. 5989.
Afeworki, Y Zekeria, ZA Videler, JJ and Bruggemann, JH 2013. Food intake by the parrotfish Scarus ferrugineus varies seasonally and is determined by temperature, size and territoriality. Marine Ecology Progress Series, Vol. 489, p. 213.
Thyresson, M. Crona, B. Nyström, M. de la Torre-Castro, M. and Jiddawi, N. 2013. Tracing value chains to understand effects of trade on coral reef fish in Zanzibar, Tanzania. Marine Policy, Vol. 38, p. 246.
Berkström, Charlotte Gullström, Martin Lindborg, Regina Mwandya, Augustine W. Yahya, Saleh A.S. Kautsky, Nils and Nyström, Magnus 2012. Exploring ‘knowns’ and ‘unknowns’ in tropical seascape connectivity with insights from East African coral reefs. Estuarine, Coastal and Shelf Science, Vol. 107, p. 1.
Moynihan, Molly A. Baker, David M. and Mmochi, Aviti J. 2012. Isotopic and microbial indicators of sewage pollution from Stone Town, Zanzibar, Tanzania. Marine Pollution Bulletin, Vol. 64, Issue. 7, p. 1348.
Cinner, Joshua.E. Folke, Carl. Daw, Tim. and Hicks, Christina.C. 2011. Responding to change: Using scenarios to understand how socioeconomic factors may influence amplifying or dampening exploitation feedbacks among Tanzanian fishers. Global Environmental Change, Vol. 21, Issue. 1, p. 7.
Thyresson, Matilda Nyström, Magnus and Crona, Beatrice 2011. Trading with Resilience: Parrotfish Trade and the Exploitation of Key-Ecosystem Processes in Coral Reefs. Coastal Management, Vol. 39, Issue. 4, p. 396.
Fishing can have major impacts on the structure of coral reef ecosystems. Overfishing of herbivores is particularly detrimental, as it makes the coral system more likely to undergo shifts to macroalgal dominance in the event of coral mass mortality. Knowing when important processes, such as herbivory, are becoming brittle is important because it can provide an opportunity for managers to avoid undesirable ecosystem-level changes. This study investigates the impact of artisanal fishing on three important functional groups of herbivores (grazers, scrapers and excavators) on five coral-dominated reefs outside Zanzibar (Tanzania). There was a negative correlation between fishing pressure and fish biomass, abundance, diversity and species richness. Moreover, fishing had a negative influence on the demographic structure of functional groups, particularly excavators, manifesting itself as a skewness towards smaller individuals within populations. Artisanal fishing can have significant impacts on key functional groups of herbivorous reef fishes which may increase the vulnerability of coral reefs to undesirable ecosystem shifts.
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