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Damage to threatened Gulf of California habitats can be reversed
Date:2/21/2010

ted marine areas. Restricted of fishing since 1995, Cabo Pulmo features a robust mix of sea life and flourishing fish populations. Other successes include Coronado Island inside the Loreto marine park and Los Islotes inside Espiritu Santo marine park.

"Different sites recover in different ways, but they all have increased in biomass, especially top predators," said Aburto-Oropeza.

"The common thing is that they have reduced or eliminated fishing activity."

Beyond simply shielding certain locations, Aburto-Oropeza's presentation will cover new research that reveals the strategic importance of protecting areas that are key for fish species populations. In particular, these include important sites such as fish "spawning aggregation" areas, where fish converge in large numbers to reproduce at select times of the year, and sensitive nursery habitats that are vital to ensuring healthy ecosystems.

"For some species these spawning aggregation events occur two to four times per year, and can represent 100 percent of the replenishment of their populations," said Aburto-Oropeza.

Aburto-Oropeza and others recently calculated the economic value of mangroves at roughly $37,500 per hectare per year. An ongoing study has shown that a fish species called gulf corvina provided 3,500 tons of landings in 2009 in one community, a volume worth $3 million.


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Contact: Mario Aguilera
scrippsnews@ucsd.edu
858-534-3624
University of California - San Diego
Source:Eurekalert  

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