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dc.contributor.advisorBrowne, Clare Melody
dc.contributor.advisorEdwards, Timothy L.
dc.contributor.advisorLing, Nicholas
dc.contributor.advisorTempero, Grant Wayne
dc.contributor.authorCooper, Ashlee Jane
dc.date.accessioned2022-06-08T03:58:54Z
dc.date.available2022-06-08T03:58:54Z
dc.date.issued2021
dc.identifier.urihttps://hdl.handle.net/10289/14893
dc.description.abstractThe New Zealand whitebait fishery consists of five species of Galaxiidae fish and constitutes a culturally important commercial and recreational resource for New Zealand. Despite efforts by the Department of Conservation and regional councils, there has been a significant decline in whitebait over the past several decades, with three of the five whitebait species (īnanga, giant kōkopu, kōaro) now classified as 'declining’ and one (shortjaw kōkopu) considered ‘threatened’. Adult fish spawn on riparian vegetation near river mouths during spring tides, the eggs then develop aerially until the following spring tide when they hatch, and the larvae disperse into coastal estuaries. Anthropogenic activities such as flood management, vegetation removal and reduced water quality have led to widespread loss of suitable spawning habitat. Identification of spawning habitat is a key aspect to conserving whitebait species. However, visual surveys for spawning sites are time consuming and spawning areas difficult to predict, as most species do not return to the same spawning site each year. Scent-detection dogs may provide an efficient and effective way of locating whitebait nests, allowing increased protection of spawning areas against disturbance. Four dogs were trained to reliably detect and discriminate giant kōkopu (Galaxias argenteus) eggs from garden snail (Cantareus aspersus) eggs, grass, and blank (no scent) samples within a laboratory-based line-up with a high level of accuracy (≥90% hit rate and ≤10% false alarm rate). Progressing from this, one dog worked on scent line-ups outdoors and demonstrated the ability to reliably detect giant kōkopu eggs (≥90% hit rate and ≤10% false alarm rate), with increasing environmental complexity, as a progression towards application of these dogs for whitebait egg detection in the field. This research provides an opportunity to further explore the use of dogs to detect whitebait spawning sites in the field, potentially providing a new tool for whitebait conservation in New Zealand.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherThe University of Waikato
dc.rightsAll items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectDog
dc.subjectScent
dc.subjectScent detection
dc.subjectFreshwater
dc.subjectWhitebait
dc.subjectGalaxiid
dc.subjectCanine
dc.subject.lcshDetector dogs -- Environmental aspects -- New Zealand
dc.subject.lcshGiant kokopu -- Habitat -- Conservation -- New Zealand
dc.subject.lcshGalaxias fisheries -- Conservation -- New Zealand
dc.subject.lcshAquatic resources conservation -- New Zealand
dc.subject.lcshGiant kokopu -- Spawning -- New Zealand
dc.subject.lcshGiant kokopu -- Ecology -- New Zealand
dc.subject.lcshEnvironmental protection -- New Zealand
dc.subject.lcshOlfactory sensors -- Environmental aspects -- New Zealand
dc.titleLocating whitebait (Galaxias argenteus) eggs via canine scent detection
dc.typeThesis
thesis.degree.grantorThe University of Waikato
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (Research) (MSc(Research))
dc.date.updated2022-06-01T20:50:37Z
pubs.place-of-publicationHamilton, New Zealanden_NZ


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