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Shorebird Conservation.pdf

New-Clues-could-save-shorebirds.pdf
Preview of Shorebird Conservation
🔗 Source: horseshoecrab.org
📊 Size: 38 KB
👤 Author: user0
⬇️ Downloads: 215

Summary

New study provides benchmarks for guiding future regulations to save shorebirds, specifically red knots, which depend on horseshoe crab eggs for food during their northern migration. Key findings include:

Egg densities are far below target levels, with 2,000-4,000 eggs per square meter on the New Jersey side and higher on the Delaware side, but still below the target of 50,000 eggs per square meter.
 Red knots need to gain 180 grams in weight to ensure breeding success, with 60-80% of the population meeting this goal.
Overharvesting of horseshoe crabs has reduced egg availability, leading to declining red knot populations, from 95,000 in 1981 to 16,000 in 2003.
 Coastal states have limited horseshoe crab harvests, but more needs to be done to protect the species.
A new model is being developed to predict scenarios for shorebirds and horseshoe crabs, including catastrophic events.
 Alternative locations for crab spawning and shorebird activity, such as Delaware's Inland Bays, are being studied.
* Red knot population has declined further, from 16,000 in 2003 to 12,375 in 2007, according to Delaware Bay surveys.

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Description

New study provides benchmarks for horseshoe crab egg supply to support red knots' migration.
Red knots rely on abundant crab eggs for food during their northern migration.
Egg availability is crucial for the species' survival.

Technical Information

  • File Format: PDF
  • File Size: 38 KB
  • Pages: 3
  • Language: EN
  • Author: user0
  • Total Downloads: 215
  • Last Updated: 1 week ago

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