The authors assessed populations of herbivorous fish in 14 reefs around New Caledonia and found that the current low fishing pressure doesn’t affect the population of macroalgae feeders. Therefore, they conclude that regulating the fishery would have a high social cost and minimal impact in mitigating the impacts of climate change.

However, they do point out that the mining industry is a major chronic stress factor, and should be regulated, rather than regulating fisheries. They found huge regional variation in the development of macroalgae development on corals after disturbances, from 11% of case studies in the Pacific, to 50% in the Indian Ocean, to 67% in the Caribbean, and conclude that regulating macroalgae-feeding fish populations (via MPAs or fisheries regulations) has highly variable impacts throughout the world.

Author: Carassou, L., M. Leopold, N. Guillemot, L. Wantiez, and M. Kulbicki
Year: 2013
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PLoS ONE 8(4): e60564. doi:10.1371/journal.pone.0060564

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