Life in local streams?

Life in local streams?

Hamilton City >120 km of mapped gully stream Many seepages

Mangakotukutuku

Other urban sites Gibbons Te Awa O Katapaki Hospital stream Bankwood

Freshwater fish Over 40 native freshwater species Around 21 introduced species Many native species migrate (e.g., whitebait) Some are long-lived eels can live >80 years Eat invertebrates terrestrial and aquatic Lay eggs sometimes outside the stream Stephen Moore, Landcare Research

Number of sites Fish in Hamilton streams 25 20 Non-threatened native species 5 spp Threatened native species 4 spp Introduced species 4 spp 15 10 Common bully Redfin bully 5 0

Bruno David, WRC The baddies

Longfin eel THREATENED animal.discovery.com

Giant kokopu THREATENED Stephen Moore, Landcare Research

Inanga - whitebait Inanga Banded kokopu Torrentfish Common bully Torrentfish Torrentfish THREATENED THREATENED (Photos: Stephen Moore, Landcare Research) Stephen Moore, Landcare Research

Torrentfish THREATENED Stephen Moore, Landcare Research

THREATENED Koura Stephen Moore, Landcare Research

Black mudfish THREATENED Photo Nick Ling

Common bully Banded kokopu Redfin bully Smelt Redfin bully (Photos: Stephen Moore, Landcare Research)

Fish sampling Electric fishing B.Hicks, University of Waikato B.Hicks, University of Waikato Spot-lighting Fyke netting Minnow trapping

Mangakotukutuku trib. Stephen Moore, Landcare Research B.Hicks, University of Waikato Stephen Moore, Landcare Research Stephen Moore, Landcare Research Stephen Moore, Landcare Research Stephen Moore, Landcare Research Stephen Moore, Landcare Research Stephen Moore, Landcare Research Stephen Moore, Landcare Research

EELS INANGA Autumn Late summer - Autumn Spring Spring terra.govt.nz

Fish migration Diagram courtesy of Cindy Baker, NIWA Eggs www.doc.govt.nz Stephen Moore, Landcare Research

Distance travelled 5,000 km Eels Inanga Banded kokopu Distance travelled > 110 km Hamilton

Banded kokopu Giant kokopu Inanga Hamilton

www.wikipedia.com www.wikipedia.com

The food pyramid Eels B. David, WRC Small fish S. Moore, Landcare Research Big invertebrates S. Moore, Landcare Research Small invertebrates S. Moore, Landcare Research Algae, leaves etc

Stream insects B. Smith, NIWA

Seeps and springs are important disconnected from stormwater network 30% of mayfly and caddisfly species from McCraw 2011 uncommon, iconic and even new invertebrate species

Oxyethira kirikiriroa B. Smith, NIWA Giant bush dragonfly T.Wilding, NIWA

Sensitive invertebrates Stephen Moore, Landcare Research

Tolerant invertebrates Stephen Moore, Landcare Research

Stormwater Storm runoff can occur 10 times more often Typical large floods can occur 3 times more often Temperatures can be around 6 o C warmer

Channelisation

Historical legacies such as old landfills

Water quality Keep chemicals out of drains Clean cars on the grass Keep rubbish out of the gully/stream Paint roofs Disconnect downpipes if roof-cleaning etc

Restore fish passage

Enhance habitat

Weight (g) Length (mm) Re-introduce fish (a) 140 130 120 110 Parana Park (P1) Chartwell Park (K11) Mangaiti Park (K10b) Mangakotukutuku (M11) K11 P1 Average M11 K10b 100 90 80 70 60 50 Jan Mar Apr Jun Aug Sep Nov Jan Time 2007 (b) 30 P1 25 20 Average 15 K11 M11 K10b Giant kokopu B. Bartells, NIWA 10 5 0 Jan Mar Apr Jun Aug Sep Nov Jan Time 2007

Riparian planting