Home   :    Contact   :    Donations
The Shark and Coral Conservation Trust
About SCCT   :       Donations   :       The Facts   :       D.E.E.P   :       News   :       Articles   :       Videos   :       What You Can Do

articles


Shark Species face extinction amid overfishing and appetite for fins
28/02/08
source : Alok Jha  The Guardian


Call for marine reserves to protect migration hotspots as Scientists fear decline will affect other species.

Nine more species of shark are to be added to the endangered list as scientists warn that oceans are being emptied of. the fish by overfishing and finning.

The scalloped hammerhead shark, which has declined by 99% over the past 30 years in some parts of the world, is particularly vulnerable and will be declared globally endangered on the World Conservation Union (IUCN) list.

"Sharks are definitely at the top of the list for marine fishes that could' go extinct in our lifetimes" said Julia Baum of the Scripps Institution of Oceanography in California and a member of IUCN shark specialist group. "If we carryon the way that we are, we're looking at a really high risk of extinction for some of these shark species within the next few decades".

At the American Association for the Advancement of Science annual meeting in Boston yesterday, Baum said that in addition to the scalloped hammerhead, other shark species that will be added to the revised IUCN endangered list later this year are the smooth hammerhead, shortfin marlin, common thresher, big-eye thresher, silky, tiger, bull and dusky. There are already 126 species of shark on the IUCN's list.

"The perception has been that really wide-ranging species can't become endangered because if they are threatened in one area, surely they'll be fine in another area," said Baum. "But fisheries now cover all corners of the earth and they're intense enough that these species are being threatened everywhere".

Recent studies have shown that all shark populatIons in the north-west Atlantic Ocean have declined by an average of 50% since the early 1970s. Shark numbers can become depleted very quickly because they take a long time to mature - 16 years in the case
of a scalloped hammerhead. Their fins are highly prized in China and can fetch up to £140 a kilogram. Until recently the eating of shark fin was a delicacy restricted to the rich in China, said Baum, but as the country's middle class has grown in the past 25 years, so has the market for shark fins.

Excessive fishing has caused a 90% decline in shark populations across the world's oceans and up to 99% along the US east coast, which are some of the best-managed waters in the world, according to Baum.

The decline in predators such as sharks can have devastating consequences for the local marine ecology.

In a case study published last year, Baum found that a major decline in the numbers of predatory sharks in the north Atlantic after 2000 had allowed populations of the sharks' prey, cownose rays, to explode. The rays in turn decimated the bay scallop populations around North Carolina. "There was a fishery for bay scallops in North Carolina that lasted over a century uninterrupted and it was closed down in 2004 because of cownose rays."

Fishing for sharks in international waters is unrestricted, but Baum supports a recent UN resolution calling for immediate limits on catching sharks and a ban on shark finning.

Sonja Fordham, of the-Shark Alliance,a coalition of 50 scientific and conservation groups, said: "People think these wide-ranging, fast sharks are resilient to fishing; however, this shows this is not the case. Concerned citizens can really help by making their fisheries-ministers aware that they support conservation 'measures such as catch limits."

Some conservation efforts for sharks will focus on newly identified hot-spots where sharks congregate during migrations. Peter Klimley of the University of California, Davis, found that scalloped hammerhead sharks migrate along fixed "superhighways" in the oceans, speeding between a series of "stepping stone" sites near coastal islands ranging from Mexico to Ecuador."Hammerhead sharks are not evenly dispersed throughout the seas, but concentrated at seamounts and offshore islands' he said. "Hence, enforcing reserves around these areas will go far in protecting these species and will provide the public with places for viewing sharks in their habitat."
One site between Hawaii and Mexico attracts so many sharks it has become known among scientists as ."the white shark cafe", Klimley says,"We started calling it the cafe because that is where you might go to have a snack or maybe just to 'see and be seen'. We are not sure which' said Salvador Jorgensen, a researcher at Stanford Uni-
versity's Hopkins Marine Station. "Once they leave the cafe they return year after year to the same exact spot along the coast, just as you might return to a favourite fishing hole."

http://www.guardian.co.uk/conservation
PREVIOUS ARTICLES

2013
Sea Urchins Tolerate Acid Water
06/04/13

SHARK KILLS NUMBER 100 MILLION ANNUALLY
02/03/13

2012
A Climate Change Agreement for Children
06/12/12

Cate Change takes Centre Stage
06/12/12

Ocean acidification and warming decrease calcification in the crustose coralline alga Hydrolithon on
13/10/12

Solar Panels - Are they really clean emergy technology
07/09/12

Ocean Acidification may limit Phytoplankton
27/08/12

Acidic POceans - why should we Care?
24/08/12

Carbon Dioxide in the Earth's atmosphere
24/08/12

Jellyfish and Chips
17/05/12

The Effects of El Nino on Marine Life (2)
19/02/12

The Effects of El Nino on Marine Life
19/02/12

Protect Our Oceans
14/01/12

Decrease in shark numbers poses risk to Great Barrier Reef
11/01/12

2011
IAP STATEMENT ON OCEAN ACIDIFICATION
28/10/11

Vast Shark Sanctuary created in the Pacific
03/10/11

Cora Reef Builders Vulnerableto Ocean Acidification
02/10/11

Is Hydrogen the Future of Motoring ??
20/09/11

Marine Protection Bids Unveiled
08/09/11

Stan Ovshinsky and the Hydrogen Economy
07/07/11

Shark Fishing Banned in the Bahamas
06/07/11

Relationships between coral and fishes on the Great Barrier Reef
10/06/11

Emissions and Growth Continue their Dance
08/06/11

Acid Test for Local Action
08/06/11

2010
'Alarming' plight of coral reefs
12/10/10

Nature's Sting - The real cost of damaging Planet Earth
12/10/10

Hoga Summary
27/09/10

Great White Sharks 'Shrinking'
14/09/10

Swiss Tycoon sends patrol boat to save Serengeti of sea
14/09/10

Asia Demand spurs Brazilian shark kills
04/08/10

Plankton decline across oceans as water warms
30/07/10

Met Office Views on Climate Change (CC)
26/07/10

Ocean Acidification in 2010
23/07/10

The Great Barrier Reef is threatened by Ships and their Cargo
22/05/10

OCEAN ACIDIFICATION ACCELERATES
30/04/10

Talking Points:Japan: eating tuna to extinction
29/03/10

UK TSB INVESTS £7M IN FUEL CELLS AND HYDROGEN
07/03/10

M4 in Wales to be 'Hydrogen Highway'
12/02/10

A Boost for Clean Energy
28/01/10

Declining Coral Calcification on the Great Barrier Reef
20/01/10

Coral Can Recover From Climate Change Damage
20/01/10

Ocean Acidification
12/01/10

Impacts of Ocean Acidification
12/01/10

Chalk one up for coccolithophores
12/01/10

Coral Reefs are evolution hotspot
09/01/10

2009
Beware the "evil twin" of climate change
30/12/09

Hydrogen Power for Vehicles - COP15
20/12/09

Natural Lab shows Sea's Acid Path
22/11/09

'Coral Lab offers Acidity Insight
22/11/09

UK Funds Sea Acidification Study
22/11/09

UK Climate Targets 'Unachievable'
13/11/09

Marine Bill Enters Final Stages
12/11/09

Recovering Scotland's Marine Environment
06/11/09

An Iron-clad Partnership
06/11/09

'Freezer Plan' bid to save coral
26/10/09

Action on Shark Finning
14/10/09

Arctic Seas turn to Acid
08/10/09

Sharks pay high price as demand for fins soar
08/10/09

Diverse Fish Reduce Coral Disease
05/10/09

Pacific Nation Declares Itself Shark Haven
03/10/09

Shark Trade Limits endorsed by EU
27/09/09

Palau Pioneers Shark Sanctuary
25/09/09

China Vows Climate Change Action
22/09/09

Shark Rescue is here
21/09/09

Doctors warn on Climate Failure
16/09/09

How Global Warming sealed the fate of the World's Coral Reefs
04/09/09

A SECOND NORTH SEA BONANZA ?
04/09/09

Paradise Lost
04/09/09

Shark Tagging Mission is under way
31/08/09

The Hydrogen Cycle
19/07/09

Climate Scenarios 'being realised'.
15/07/09

Ocean Acidification - Calcifying Phytoplankton
01/07/09

Ocean Acidification on benthic biodiversity
01/07/09

In the Soup - Shark species facing extinction
25/06/09

Over fishing Threatens Shark Extinction
25/06/09

Student film highlights plight of the oceans
04/05/09

Ocean Acidification threatens underwater ecosystems
04/05/09

Drowning in Plastic
30/04/09

'Clean' Coal Plants Get Go-Ahead
23/04/09

Paving the Road to COP15: Adaptation and Outreach
21/03/09

The Road to Catastrophe
20/03/09

World's leading scientists i n desperate plea to politicians to act on climate change
14/03/09

Pollution to devastate shellfish by turning seas acidic
14/03/09

THREATS FROM OCEAN ACIDIFICATION
11/03/09

CO2 HIGHEST FOR 650,000 YEARS
01/03/09

SLOW PROGRESS ON OCEAN PROTECTION
28/02/09

Jellyfish and Chips
18/02/09

London Marathon Motivation
07/02/09

EU Gives Shark Protection Teeth
06/02/09

ACID OCEANS 'NEED URGENT ATTENTION'
31/01/09

OCEAN ACIDIFICATION - The other CO2 problem
28/01/09

Panel Warns on Great Barrier Reef
03/01/09

Coral Reef Growth is Slowest Ever
03/01/09

2008
Changes amplify Arctic Warming
17/12/08

Rise in CO2 affrects Jumbo Squid
16/12/08

Jellyfish Invasion
21/11/08

The Rate of Ocean Acidification
18/11/08

Ocean Acidification Impacts
18/11/08

Impact of Ocean Acidification on Coral Reefs and Other Calcifiers
20/10/08

Nature Loss Dwarfs Bank Crisis
10/10/08

The Creation of Artificial Reefs
23/09/08

Iceland - Fossil fuels to Hydrogen-based Economy
17/09/08

The world's oceans at risk from rising acidity
25/07/08

Coral reefs under threat from humans
11/07/08

Ocean Acidification - Plankton hold surprise for Climate Research
28/06/08

Anthropogenic Ocean Acidification over the 21st Century and its Impact on Calcifying Organisms
13/06/08

Mileage from Megawatts
12/06/08

Could US scientists 'CO2 Catcher' help slow warming ?
09/06/08

Sharks Swim Closer to Extinction
22/05/08

Wildlife Populations Plummeting
16/05/08

Introducing Hydrogen Power
30/04/08

Ocean Acidification - Technical Information
28/04/08

Carbon Capture and Storage - UKCCSC Project
28/04/08

Lemon Sharks and Dogfish - Hyperbaric Sensitivity ??
29/03/08

The GAIA Theory
26/03/08

Status of the World's Coral Reefs
24/03/08

Krill, Fishing Threatens the Antarctic
23/03/08

Marine Altruistic Behaviour - - 4 stories
22/03/08

Global Sea Level Changes
22/03/08

Climate Change Controversies - A Simple Guide
21/03/08

Sharks and Coral Reefs (One year on)
10/03/08

Shark Species face extinction amid overfishing and appetite for fins
28/02/08

SCCT Presentation Uptake
11/02/08

Coral Reefs Under Rapid Climate Change and Ocean Acidification
27/01/08

An exchange of views on Marine Reserves and Trophic Cascades
25/01/08

2007
The Effects of Global Warming on the Great Barrier Reef
21/12/07

Microbial Ecology and Evolution:A Discussion at Metagenomics 2006
15/12/07

Habitat Conservation
28/11/07

Marine Balances and Climate Engineering
27/11/07

Oceans are 'soaking up' less CO2
20/10/07

Algal Blooms in the Ocean
08/09/07

UK Marine Bill
15/08/07

Tourism Vs Traditional Fishing
10/08/07

US National Plan of Action for the Conservation and Management of Sharks
29/07/07

Shark Depredation and unwanted Bycatch in Pelagic Longline Fisheries
17/07/07

Ecosystems: Coral Reefs
28/06/07

Shell-shocked
20/06/07

Ongoing Collapse of Coral Reef Shark Population
12/06/07

Shark trade restriction bid fails
12/06/07

Be nicer to sharks
26/05/07

Cascading Effects of the loss of Apex Predatory Sharks from a Coastal Ocean
25/05/07

Sharks are vital for Coral Reef Health
25/05/07

Sharkless Seas
21/05/07