Land use, associated eel production, and abundance of fish and crayfish in streams in Waikato, New Zealand

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dc.contributor.authorHicks, Brendan J.
dc.contributor.authorMcCaughan, Helen M. C.
dc.date.accessioned2008-12-10T22:57:18Z
dc.date.available2008-12-10T22:57:18Z
dc.date.issued1997
dc.description.abstractThe density and biomass of fish and crayfish, and the production of eels, was compared among streams in native forest, exotic forest, and pasture. Populations were estimated by multiple-pass electroshocking at 11 sites in hill-country streams in the Waikato region, North Island. Three sites were in native forest, four in exotic forest, and four in pasture. Length of stream sampled at each site was 46-94 m (41-246 m2 in area), and catchment areas up stream of the sites ranged from 0.44 to 2.01 km2. A total of 487 fish were caught. The species were longfinned and shortfinned eels, banded kokopu, Cran's and redfinned bullies, and common smelt. Eels were the most abundant fish in all three land-use types, and shortfinned eels were more abundant at pastoral sites (mean density 1.11 fish m-2) than longfinned eels (mean density 0.129 fish m-2). Banded kokopu were present only at forested sites. Mean fish densities were greater at pastoral sites (1.55 fish m-2) than under either native forest (0.130 fish m-2) or exotic forest (0.229 fish m-2). Mean fish biomass was also greater at pastoral sites (89.7 g m-2) than under native forest (12.8 g m-2) or exotic forest (19.3 g m-2). Longfinned eels made a greater contribution to the fish biomass at all sites than did shortfinned eels. Densities of crayfish were high (0.46-5.40 crayfish m-2), but were not significantly different between land-use types. Crayfish biomass ranged from 1.79 to 11.2 g m-2. Total eel production was greater at pastoral sites (mean 17.9 g m-2 year-1) than at forest sites (mean 2.39 g m-2 year-1).en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationHicks, B.J. & McCaughan, H.M.C. (1997). Land use, associated eel production, and abundance of fish and crayfish in streams in Waikato, New Zealand. New Zealand Journal of Marine and Freshwater Research 31(5), 635-650.en_US
dc.identifier.doi10.1080/00288330.1997.9516795en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/1575
dc.language.isoen
dc.publisherRSNZ Publishingen_NZ
dc.relation.isPartOfNew Zealand Journal of Marine and Freshwater Researchen_NZ
dc.relation.urihttp://www.royalsociety.org.nz/Site/publish/Journals/nzjmfr/1997/55.aspxen_US
dc.rightsCopyright New Zealand Journal of Marine and Freshwater Research 1997. Used with permission.en_US
dc.subjectbiologyen_US
dc.subjecteelsen_US
dc.subjectbulliesen_US
dc.subjectcommon smelten_US
dc.subjectdensityen_US
dc.subjectbiomassen_US
dc.subjectland useen_US
dc.subjectnative foresten_US
dc.subjectexotic foresten_US
dc.subjectpastureen_US
dc.subjectstreamsen_US
dc.subjectproductionen_US
dc.titleLand use, associated eel production, and abundance of fish and crayfish in streams in Waikato, New Zealanden_US
dc.typeJournal Articleen_US
pubs.begin-page635en_NZ
pubs.elements-id39484
pubs.end-page650en_NZ
pubs.issue5en_NZ
pubs.volume31en_NZ
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