Horseshoe Crab Decline.pdf

Horseshoe crab populations have declined significantly over the past two decades due to commercial trawling, threatening the survival of shorebirds such as the red knot. The red knot population has decreased from 100,000 to 13,315 in the past 20 years, with a potential extinction date of 2010 if current trends continue. The decline of horseshoe crabs has reduced the availability of food for shorebirds, which rely on the crabs' eggs to fuel their migration. Conservation efforts are underway, including restrictions on horseshoe crab harvesting and potential listing of the red knot as an endangered species. However, the issue is complex, with uncertainties surrounding the shorebirds' plight and the impact of crabbing on the ecosystem. Regulators are working to balance the needs of watermen and the environment, while scientists continue to study the horseshoe crab population and its role in the ecosystem. Key statistics include:

90% of horseshoe crabs harvested for medical use are returned to the sea after blood extraction
86% decline in newly matured female horseshoe crabs between 2001 and 2003
10 years for horseshoe crabs to reach sexual maturity
18,000 horseshoe crab eggs consumed by shorebirds per day
* 100,000 to 13,315 decline in red knot population over 20 years.