nz freshwater fishes - diversity & population trends events/2015... · nz freshwater fishes -...
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NZ freshwater fishes -
diversity & population trends
Jane Goodman
Department of Conservation
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77 species
54 natives
1 extinct
New Zealand Grayling
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Diadromous/migratory fish
Non-migratory fish
Burrowing fish
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Fish that “aestivate”
Parasitic fish
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Climbing fish
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Ever wondered what becomes
of a whitebait when it’s life
isn’t frittered away?
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Migratory galaxiids
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Longfin eels
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8 Bully species
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Torrentfish
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Non-migratory galaxiids
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5 mudfish species
Canterbury mudfish
Black mudfish
Brown mudfish & their habitat
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74 %Threatened or At Risk
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Central Otago roundhead galaxias
Extinctions
Population of galaxiids with trout above
Galaxiids only
Central Otago
roundhead galaxias
12 local extinctions
26 populations left
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2.67
1.30
4.51
0.920.78
0.91
0.28 0.28
0.67
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017
Lowland longjaw/m2 from 2004 to 2012
Lowland longjaw galaxias
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Causes of
decline}Daniel Jack
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How do we maintain & improve
freshwater fish biodiversity?
• protection of species?
• protection of freshwater ecosystems?
• management plans?
• keep on doing what we’re doing?
• raising awareness of what it means if
these fish disappear and encouraging
involvement from New Zealanders?