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dc.contributor.authorHicks, Brendan J.
dc.contributor.authorOsborne, Matthew W.
dc.contributor.authorLing, Nicholas
dc.coverage.spatialConference held at Fisheries Incidental Publication No 25. Northern Territory Department of Primary Industry, Fisheries and Mines, Darwinen_NZ
dc.date.accessioned2009-02-17T03:59:44Z
dc.date.available2009-02-17T03:59:44Z
dc.date.issued2006
dc.identifier.citationHicks, B.J., Osborne, M.W. & Ling, N. (2006). Quantitative estimates of fish abundance from boat electrofishing. Proceedings, Australian Society for Fish Biology annual conference, Darwin, NT, (pp. 11-15 ) July 2005.en
dc.identifier.urihttps://hdl.handle.net/10289/2025
dc.description.abstractMultiple removals by boat electro-fishing were used to estimate fish populations in non-wadeable habitats in New Zealand lakes and rivers. Mean capture probability was 0.47±h0.10 (± 95% CI) from 35 population estimates made with 2-7 successive removals. The relationship between the population estimate from the Zippin method (Y)and the number of fish caught in the first removal (X) was significant (adjusted r2=0.84, P<0.001; Figure 2). The least-squares regression was Y = 1.55X 1.23. Mean density ± 95% confidence interval for 13 fishing occasions was 30±27 fish 100 m- 2. Mean biomass of fish for sites was 78±39 g m-2 (range 29 to 245 g m-2). Koi carp comprised the largest proportion of the fish biomass wherever they were present. The high biomasses of koi carp estimated in these results (mean 56±33 g m-2) suggest that they can reach problematic abundances in New Zealand. Bioniass of spawning koi carp can exceed 400 g m-2.en
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherConference held 11-15 July 2005, Darwin, Northern Territory, Australiaen_NZ
dc.relation.urihttp://www.asfb.org.au/pubs/index.htmen
dc.subjectbiologyen
dc.subjectcapture probabilityen
dc.subjectpopulation estimationen
dc.subjectkoi carpen
dc.titleQuantitative estimates of fish abundance from boat electrofishingen
dc.typeConference Contributionen
dc.relation.isPartOfAustralian Society for Fish Biology Workshop Proceedings: A Guide to Monitoring Fish Stocks and Aquatic Ecosystemsen_NZ
pubs.begin-page104en_NZ
pubs.elements-id17775
pubs.end-page110en_NZ


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