# Migratory Bird Hunting; Approval of Tungsten-Matrix Shot as Nontoxic for Hunting Waterfowl and Coots
> **US Fish and Wildlife Service** · Final rule. · Published 2000-09-06 · Effective 2000-09-06 · 65 FR 53936
## Document
- **Document number:** 00-22721
- **Category:** migratory-bird
- **Sub-agency:** US Fish and Wildlife Service
- **Federal Register citation:** 65 FR 53936
- **CFR reference:** 50 CFR 20
- **Publication date:** 2000-09-06
- **Effective date:** 2000-09-06
## Abstract

The U.S. Fish and Wildlife Service (Service or we) amends 50 CFR 20.21(j) to grant final approval of tungsten-matrix shot as nontoxic for hunting waterfowl and coots. Acute toxicity studies reveal no adverse effects over a 30-day period on mallards (Anas platyrhynchos) dosed with tungsten-matrix shot. Reproductive/chronic toxicity testing over a 150-day period indicated that tungsten-matrix administered to adult mallards did not adversely affect them or the offspring they produced. We also remove 50 CFR Subpart M (Part 20-- Migratory Bird Hunting)--Criteria and Schedule for Implementing Nontoxic Shot Zones for the 1987-88 and Subsequent Waterfowl Hunting Season because implementation of nontoxic shot zones in the United States was completed in 1991.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2000/09/06/00-22721/migratory-bird-hunting-approval-of-tungsten-matrix-shot-as-nontoxic-for-hunting-waterfowl-and-coots)
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