Conservation risk highest off coasts of Canada, Mexico, Peru and New Zealand: research

Feb 20, 2012

University of British Columbia researchers have identified conservation "hot spots" around the world where the temptation to profit from overfishing outweighs the appetite for conservation.

Combining and fisheries population growth rates for all countries currently reported to fish in the ocean, UBC fisheries researchers William Cheung and Rashid Sumaila developed a conservation to reveal the economic-conservation trade-offs of fishing.

Areas with the highest risk index – those most biologically and economically vulnerable to – include the northeastern coast of Canada, the Pacific coast of Mexico, the Peruvian coast, the south Pacific (offshore of New Zealand in particular), the southern and southeastern coast of Africa, and the Antarctic region.

"This index gives us a clear guide to determine the appropriate conservation and fisheries management policy for each region," says Cheung, an assistant professor in UBC's Fisheries Centre, who presented his research during a press briefing at the Annual Meeting of the American Association for the Advancement of Science (AAAS) in Vancouver, Canada.

"The most vulnerable area may need to be protected with special management approaches – such as marine protected areas, while others may benefit from economic incentives to better manage the ecosystems – such as territorial use rights in fisheries, or TURFs," says Sumaila, professor and director of the UBC Fisheries Centre.

The index can also help conservation managers use scarce resources in a targeted, efficient and effective way to ensure the conservation of seafood and marine ecosystems, Sumaila adds.

"Fishing has a major impact on marine biodiversity, causing the depletion of many species," says Cheung, who grew up in Hong Kong and focused his earlier research on fisheries in the South China Sea – one of the most over-exploited areas in the world's oceans. "I witnessed how overfishing can damage marine ecosystems and the goods and services they provide – but in order to solve the problem, we need an understanding of both biology and economics. Biology determines whether a stock is more vulnerable to fishing, while economics determines how strong the incentive is to overfish the stock now."

The conservation risk index is based on two numbers: the discount rate and intrinsic population growth rate for fisheries. The discount rate for the is how much a dollar of fish would be worth now if one were to get this dollar one year later – similar to the long-term lending interest rate of central banks. The intrinsic rate is the difference between the birth and death rate.

Cheung and Sumaila used published discount rates of countries that are reported to fish in the ocean and intrinsic growth rates for major exploited species to calculate the conservation risk index for each half degree square area of the world's oceans (2500 square-kilometres, roughly the size of Metro Vancouver or three times the size of New York City). The higher the conservation risk index number, the more vulnerable the area is.

Explore further: Stanford researchers rethink 'natural' habitat for wildlife

add to favorites email to friend print save as pdf

Related Stories

US Atlantic cod population to drop by half by 2050

Feb 12, 2009

A University of British Columbia researcher put a number to the impact of climate change on world fisheries at today's Annual Meeting of the American Association for the Advancement of Science (AAAS) in Chicago.

Global fisheries research finds promise and peril

Sep 14, 2010

Global fisheries, a vital source of food and revenue throughout the world, contribute between US$225-$240 billion per year to the worldwide economy, according to four new studies released today. Researchers also concluded ...

Recommended for you

Plants with dormant seeds give rise to more species

13 hours ago

Seeds that sprout as soon as they're planted may be good news for a garden. But wild plants need to be more careful. In the wild, a plant whose seeds sprouted at the first warm spell or rainy day would risk disaster. More ...

Scientists tether lionfish to Cayman reefs

23 hours ago

Research done by U.S. scientists in the Cayman Islands suggests that native predators can be trained to gobble up invasive lionfish that colonize regional reefs and voraciously prey on juvenile marine creatures.

User comments : 0

More news stories

Researchers successfully clone adult human stem cells

(Phys.org) —An international team of researchers, led by Robert Lanza, of Advanced Cell Technology, has announced that they have performed the first successful cloning of adult human skin cells into stem ...

Male monkey filmed caring for dying mate (w/ Video)

(Phys.org) —The incident was captured by Dr Bruna Bezerra and colleagues in the Atlantic Forest in the Northeast of Brazil.  Dr Bezerra is a Research Associate at the University of Bristol and a Professor ...

Researchers develop new model of cellular movement

(Phys.org) —Cell movement plays an important role in a host of biological functions from embryonic development to repairing wounded tissue. It also enables cancer cells to break free from their sites of ...

Impact glass stores biodata for millions of years

(Phys.org) —Bits of plant life encapsulated in molten glass by asteroid and comet impacts millions of years ago give geologists information about climate and life forms on the ancient Earth. Scientists ...