Caspian seal population declines 90% - Now endangered

06/10/2008 07:40:24 One of the world's smallest seals - the Caspian - has joined a growing list of mammal species in danger of extinction.

October 2008. Scientists from the University of Leeds have documented the disastrous decline of the seal - a species found only in the land-locked waters of the Caspian Sea - in a series of surveys which reveal a 90 per cent drop in numbers in the last 100 years.

Now endangered
The research findings have prompted the International Union for Conservation of Nature (IUCN) to move the Caspian seal from the Vulnerable category to Endangered on its official IUCN Red List of Threatened Species.

One pup per year
Dr Simon Goodman of Leeds' Faculty of Biological Sciences says: "Each female has just one pup a year, so with numbers at such a low levels, every fertile female that dies is a nail in the coffin of the species. We're hoping that the seal's change in Red List status will help raise awareness about their plight, and the many important conservation issues facing the whole Caspian ecosystem."

Hunting, habitat degradation, disease, pollution and bycatch
Commercial hunting, habitat degradation, disease, pollution and drowning in fishing nets have caused the population of the seal collapse from more than 1 million at the start of the 20th century to around 100,000 today.

Just 17,000 breeding females
Results from surveys conducted in 2005 and 2006, published recently in the scientific journal Ambio, show that in 2006 there were only 17,000 breeding females, barely enough to keep the population viable, given the low survival rate of pups.

Birth rate collapse
Moreover, new results from surveys conducted by the team in 2007 and 2008, show that since 2005 the number of pups being born has plummeted by a catastrophic further 60 per cent to just 6,000-7,000, and the number of adults seen on the breeding grounds of the winter ice-field is down by a third on 2005.

Hunting
With commercial hunters from Dagestan in the Russian Federation killing more than 8,000 pups in recent years, the team is urging the governments of the Caspian countries to instate a ban on hunting as the first step in avoiding further declines. "Without a suite of conservation measures there is a very high risk the species will become extinct, and possibly within our lifetime," says Dr Goodman.

The team is using its latest figures and ongoing research to develop a conservation action plan, which will give priority to a ban on hunting the seal and establish protected areas with the countries bordering the Caspian Sea. The basic plan has been completed, but the main recommendations are yet to be fully implemented by the countries of the region.

Dr Susan Wilson, a consultant in seal conservation biology and one of the authors of the Ambio paper says: "Although there are no easy fixes to the problems facing Caspian seals, we hope to get some concrete measures in place over the next year, particularly in Kazakhstan where the government has been quick to recognise the need for urgent action."

Dr Goodman's team is also working on a project - funded by Defra (UK - Department for Environment, Food and Rural Affairs ) through the Darwin Initiative - to enhance the ability of local scientists to monitor and manage the seal population themselves.