Focal point characteristics and habitat use curves of underyearling brown trout (Salmo trutta) in the Kahuterawa Stream : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Zoology at Massey University

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dc.contributor.authorForlong, Robert Graham
dc.date.accessioned2018-01-16T00:33:18Z
dc.date.available2018-01-16T00:33:18Z
dc.date.issued1988
dc.description.abstractThe physical focal point characteristics of underyearling brown trout (Salmo trutta) were examined by underwater observation in a nursery stream to determine the preferred depths, current speeds and substrates. Each focal point characteristic was analysed with respect to fish activity and age (in months after emergence). Underyearling brown trout in the Kahuterawa stream were found to use focal points with different physical characteristics for different activities. As they aged the Kahuterawa trout moved into swifter, deeper water. The Physical Habitat Simulation (PHABSIM) of the Instream Flow Incremental Methodology (IFIM) was examined by obtaining habitat use curves from the focal point data, which were compared with habitat relative preference curves. Habitat relative preference curves examine habitat use in relation to habitat availability. It is concluded that habitat relative preference curves should be developed for each activity class of each life stage of the target species. In the case of brown trout, emergent fry should be considered a separate life stage from fingerlings. PHABSIM is criticized because it takes little account of cover and current shelter which are shown to be important factors in focal point choice.en_US
dc.identifier.urihttp://hdl.handle.net/10179/12603
dc.language.isoenen_US
dc.publisherMassey Universityen_US
dc.rightsThe Authoren_US
dc.subjectBrown trout -- New Zealanden_US
dc.subjectKahuterawa Streamen_US
dc.subjectEcologyen_US
dc.titleFocal point characteristics and habitat use curves of underyearling brown trout (Salmo trutta) in the Kahuterawa Stream : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Zoology at Massey Universityen_US
dc.typeThesisen_US
massey.contributor.authorForlong, Robert Graham
thesis.degree.disciplineZoologyen_US
thesis.degree.grantorMassey Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M. Sc.)en_US
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