New Zealand Mudsnail Potamopyrgus antipodarum Management and Control Plan Draft

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New Zealand Mudsnail (Potamopurgus
antipodarum) Management and Control Plan
Tina Proctor, USFWS 5th New Zealand Mudsnail in
the Western USA Conference Davis, California
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(No Transcript)
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NZ Mudsnail Management and Control Plan Working
Group

• Tina Proctor, USFWS, Denver
• Billie Kerans, MT State U
• Pat Clancey, MT Fish, Wildlife and Parks
• Eileen Ryce, MT Fish, Wildlife and Parks
• Mark Dybdahl, WA State U
• Robert Hall, U of WY
• Frank Pickett, PPL Montana
• David Richards, EcoAnalysts, Inc.
• Robyn Draheim, Portland State U

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Working Group Members

• Robert Wiltshire, Federation of Fly Fishers
• Dawne Becker, CA Fish and Game
• Mark Anderson, National Park Service
• Bob Pitman, USFWS, Albuquerque
• Denny Lassuy, USFWS, Anchorage
• Paul Heimowitz, USFWS, Portland
• Pat Dwyer, Fisheries consultant, Bozeman
• Ed Levri, Penn State U, Altoona
• John Chapman, OR State U

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Working Group Review

• Team met in Bozeman in August 03, 04 and 05.
• Team reviewed first draft in January 06 and
  second draft in March 06. The Implementation Plan
  review was in March and April 06. Approval of
  Draft Plan by ANSTF in May 06.
• Approval of final plan by ANSTF in May 07.

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Distribution of Introduced Clones
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DescriptionTwo Western U.S. Clones

• 1-5 mm
• Light to dark brown
• On left is typical western clone (US 1), on right
  is the newly identified western clone from the
  Snake River, Idaho (US 3), which is broader, has
  a larger last whorl and is paler

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New Western Clone

• US 3 - some shells have a carina broken into
  isolated scales
• Mark Dybdahl is working on genetic studies of
  this clone to determine pathway of introduction

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Further Comparison

• US 1 on left, US 3 on right. Last whorl is
  unpigmented
• Although occasional males are present (more males
  for second clone), they reproduce asexually

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DescriptionEastern U.S. Clone

• US 2 is very similar to the typical western clone
• Notice operculum which is present on all clones
  and protect the snails from being digested for
  example

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Western U.S. Expansion
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Great Lakes Occurrences
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Goal of Plan

• To prevent and delay the spread of NZ mudsnails
  to new areas, reduce the impacts of existing and
  new populations, and continue developing
  information to meet this goal

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Objectives

• Identify foci, pathways and vectors
• Develop methods of detecting new populations
• Develop strategies and methods to control and
  manage populations
• Develop further understanding of ecological and
  economic impacts
• Increase public understanding of the need to deal
  with NZ mudsnails and gain political support for
  implementing national plan objectives.

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Implementation

• Develop risk assessment of different pathways
• Expand website and create database on NZ mudsnail
  sampling efforts
• Develop hatchery certification
• Create model provision for States that requires
  HACCP plan for aquaculture
• Develop sources of funding for research
• Raise awareness to audiences associated with
  identified pathways
• Develop corps of volunteer anglers who can
  provide technical assistance regarding prevention

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Research

• Establish baseline data in States which currently
  have populations
• Develop effective mechanical, physical, chemical
  and biological control methods
• Continue studies on treatment of gear to find an
  effective method which can be used by anglers
• Investigate the effects of NZ mudsnails on
  community structure and ecosystem function
• Investigate the effects of NZ mudsnails on
  vertebrates including trout and waterfowl
• Investigate effectiveness of NZ mudsnail outreach
  methods in changing behavior of target audiences.