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dc.contributor.authorRabeni, C.F.
dc.contributor.authorCollier, Kevin J.
dc.contributor.authorParkyn, Stephanie M.
dc.contributor.authorHicks, Brendan J.
dc.date.accessioned2008-12-11T01:04:47Z
dc.date.available2008-12-11T01:04:47Z
dc.date.issued1997
dc.identifier.citationRabeni, C.F., Collier, K.J., Parkyn, S.M. & Hicks, B.J. (1997). Evaluating techniques for sampling stream crayfish (paranephrops planifrons). New Zealand Journal of Marine and Freshwater Research 31(5), 693-700.en_US
dc.identifier.urihttps://hdl.handle.net/10289/1576
dc.description.abstractWe evaluated several capture and analysis techniques for estimating abundance and size structure of freshwater crayfish (Paranephrops planifrons) (koura) from a forested North Island, New Zealand stream to provide a methodological basis for future population studies. Direct observation at night and collecting with baited traps were not considered useful. A quadrat sampler was highly biased toward collecting small individuals. Handnetting at night and estimating abundances using the depletion method were not as efficient as handnetting on different dates and analysing by a mark-recapture technique. Electrofishing was effective in collecting koura from different habitats and resulted in the highest abundance estimates, and mark-recapture estimates appeared to be more precise than depletion estimates, especially if multiple recaptures were made. Handnetting captured more large crayfish relative to electrofishing or the quadrat sampler.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherRSNZ Publishingen_NZ
dc.relation.urihttp://www.royalsociety.org.nz/Site/publish/Journals/nzjmfr/1997/59.aspxen_US
dc.rightsCopyright New Zealand Journal of Marine and Freshwater Research. Used with permission.en_US
dc.subjectbiologyen_US
dc.subjectcrayfishen_US
dc.subjectpopulation structureen_US
dc.subjectdepletionen_US
dc.subjectmark-recaptureen_US
dc.subjectelectrofishingen_US
dc.subjectNew Zealanden_US
dc.titleEvaluating techniques for sampling stream crayfish (paranephrops planifrons)en_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1080/00288330.1997.9516799en_NZ
dc.relation.isPartOfNew Zealand Journal of Marine and Freshwater Researchen_NZ
pubs.begin-page693en_NZ
pubs.elements-id39498
pubs.end-page700en_NZ
pubs.issue5en_NZ
pubs.volume31en_NZ


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