San Francisco (UPI) May 18, 2011
A rash of deaths among leopard sharks in San Francisco Bay may be linked to heavy winter rains diluting saltwater in the bay, wildlife officials say.
State biologists investigating a rash of leopard shark casualties over the past month say they think the body chemistry of the fish may be thrown fatally off balance by the torrents of fresh water flowing into shoreline lagoons where they sharks prefer to give birth and search for food, The San Francisco Chronicle reported Wednesday.
"They might be going into these coves to pup," Carrie Wilson, a marine biologist with the California Department of Fish and Game, said. "If there's more fresh water intrusion and low salinity, it's very tough on these animals."
More than 100 adult and juvenile leopard sharks have been found dead since mid-April, officials said.
The sharks, which can grow to 5 feet long and live 40 years or more, are a common sight in shallow coastal waters from Oregon to Mexico.
Share This Article With Planet Earth
Water News - Science, Technology and Politics
Salinity in Outer Banks wells traced to fossil seawater
Durham NC (SPX) May 13, 2011
Rising salinity in the primary source for desalinated tap water in North Carolina's Outer Banks has been traced to fossil seawater, not - as some have feared - to recent seawater intrusion. This means the saline groundwater in the Yorktown aquifer can remain a valuable source of desalination for decades to come, without Dare County communities having to switch to the much more costly alter ... read more
Quake-hit New Zealand takes axe to public services|
Japan tells tourists says 'it's safe' to come back
US extends relief for undocumented Haitians
Japan TEPCO workers enter reactor building
Amazon selling more Kindle books than print books
China slaps export quota on rare earth alloys
Physicist accelerates simulations of thin film growth
Research questions reality of supersolid in Helium-4
Heavy rains a suspect in sharks' deaths
Floating 'green' golf course for Maldives
Greenhouse ocean study offers warning for future
Ocean warming detrimental to inshore fish species
Research aircraft Polar 5 returned from spring measurements in the high Arctic
Denmark plans claim to North Pole seabed: foreign minister
Ecological impact on Canada's Arctic coastline linked to climate change
Canada PM's Arctic stand 'frosty rhetoric'
New method of unreeling cocoons could extend silk industry beyond Asia
Post-Mubarak Egypt 'running out of food'
Exploding melons sow new China food fears
Livestock genes could protect against one of Africa's oldest animal plagues
5.9-magnitude quake hits northwest Turkey: one dead
US predicts up to 10 Atlantic hurricanes this season
Historic US flooding turns deadly
Australian flood costs top $6 billion
Sudan stages new Darfur air strikes: UN
British PM rejects pressure on aid budget
Mozambique wages war on man-eating crocs
Humanity can and must do more with less
The roots of memory impairment resulting from sleep deprivation
Clubbers can smell a good nightspot
Sporadic mutations identified in children with autism spectrum disorders
Computer program aids patients in end-of-life planning
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2010 - SpaceDaily. AFP and UPI Wire Stories are copyright Agence France-Presse and United Press International. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by SpaceDaily on any Web page published or hosted by SpaceDaily. Privacy Statement|