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Otolith microchemistry of koi carp in the Waikato region, New Zealand: a tool for identifying recruitment locations

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dc.contributor.author Blair, Jennifer Marie
dc.contributor.author Hicks, Brendan J.
dc.date.accessioned 2012-10-02T02:10:16Z
dc.date.available 2012-10-02T02:10:16Z
dc.date.issued 2012
dc.identifier.citation Blair, J.M. & Hicks, B.J. (2012). Otolith microchemistry of koi carp in the Waikato region, New Zealand: a tool for identifying recruitment locations? Inland Waters, 2(3), 109-118. en_NZ
dc.identifier.issn 2044-2041
dc.identifier.issn 2044-205X
dc.identifier.uri http://hdl.handle.net/10289/6669
dc.description.abstract We assessed differences in the otolith microchemistry of koi carp, a colour variant of the invasive common carp Cyprinus carpio, at various locations in the Waikato region of New Zealand. Although koi carp are abundant here, little is known about where and in what habitats they breed. We investigated the feasibility of determining the natal habitats of adult koi carp (in the Waikato River, selected tributaries, and riverine lakes in the catchment) using otolith elemental signatures and employing laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Differences in elemental concentrations in water among the sites indicated that variation in otolith microchemistry was likely. Ratios of manganese (Mn), rubidium (Rb), strontium (Sr), and barium (Ba) to calcium (Ca) in otolith edges differed significantly among the sites, and Sr:Ca in the water and otoliths was positively correlated. A discriminant function analysis using Rb, Sr, and Ba accurately classified the otolith edge signatures of koi carp from some locations, but the otolith signatures of koi carp caught from adjacent locations were often indistinguishable. This suggests that our results could have been confounded by either (1) recent movement of koi carp or (2) a lack of differences in water chemistry among sites. Taken together, these results demonstrate that otolith microchemistry can be used to test retrospectively for koi carp migration between sites on a broad scale in the Waikato region, but fine-scale movements may not be detectable. en_NZ
dc.language.iso en
dc.publisher Freshwater Biological Association en_NZ
dc.relation.uri https://www.fba.org.uk/journals/index.php/IW/article/viewFile/480/304 en_NZ
dc.rights © International Society of Limnology 2012. Used with permission. en_NZ
dc.subject Cyprinus carpio en_NZ
dc.subject Habitat utilization en_NZ
dc.subject Invasive species en_NZ
dc.subject LA-ICP-MS en_NZ
dc.subject Migration en_NZ
dc.subject Waikato River en_NZ
dc.title Otolith microchemistry of koi carp in the Waikato region, New Zealand: a tool for identifying recruitment locations en_NZ
dc.type Journal Article en_NZ
dc.identifier.doi 10.5268/IW-2.3.480 en_NZ


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