Population abundance estimates of the New Zealand geoduck clam, Panopea zelandica, using north american methodology: Is the technology transferable?

Gribben, PE; Helson, J; Millar, R

Population abundance estimates of the New Zealand geoduck clam, Panopea zelandica, using north american methodology: Is the technology transferable?

Gribben, PE Helson, J Millar, R

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Publisher:: National Shellfisheries Association
Publication Type:: Journal Article
Citation:: Journal of Shellfish Research, 2004, 23 (3), pp. 683 - 691
Issue Date:: 2004-01

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Field	Value	Language
dc.contributor.author	Gribben, PE	en_US
dc.contributor.author	Helson, J	en_US
dc.contributor.author	Millar, R	en_US
dc.date.issued	2004-01	en_US
dc.identifier.citation	Journal of Shellfish Research, 2004, 23 (3), pp. 683 - 691	en_US
dc.identifier.issn	0730-8000	en_US
dc.identifier.uri	http://hdl.handle.net/10453/8644
dc.description.abstract	This study investigates the applicability of methods used to describe patterns of distribution, and estimates of density and biomass of the Pacific geoduck clam, Panopea abrupta, from western North America for populations of the New Zealand geoduck, Panopea zelandica in Kennedy Bay, on the Coromandel Peninsula, and in Wellington Harbour. Central to this is the use of line transect surveys and estimations of the detection rate of geoduck (show-factor) using counts of siphon holes. Studies were restricted to less than 17 m water depth. Geoduck in Kennedy Bay were found from 4-8 m water depth, whereas geoduck in Wellington Harbour occurred in several separate beds from 4-16 m. In Wellington Harbour, there was a pattern of increasing numbers with depth up to ~15 m. Numbers seemed to decrease thereafter. Analysis of sediment samples indicated that P. zelandica was more prevalent in fine sand to fine silty sand substrates. P. abrupta is found in similar habitats. There was no significant difference in the show-factor (the proportion of geoduck detectable by sight or touch vs. the actual number of geoduck present) of geoduck with respect to season (summer and winter), region (Wellington Harbour and Kennedy Bay), or tidal height (low, mid, and high tide).	en_US
dc.publisher	National Shellfisheries Association	en_US
dc.relation.ispartof	Journal of Shellfish Research	en_US
dc.subject.classification	Marine Biology & Hydrobiology	en_US
dc.title	Population abundance estimates of the New Zealand geoduck clam, Panopea zelandica, using north american methodology: Is the technology transferable?	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	23	en_US
utslib.for	0608 Zoology	en_US
utslib.for	0704 Fisheries Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	open_access
pubs.consider-herdc	true	en_US
pubs.issue	3	en_US
pubs.volume	23	en_US

Abstract:

This study investigates the applicability of methods used to describe patterns of distribution, and estimates of density and biomass of the Pacific geoduck clam, Panopea abrupta, from western North America for populations of the New Zealand geoduck, Panopea zelandica in Kennedy Bay, on the Coromandel Peninsula, and in Wellington Harbour. Central to this is the use of line transect surveys and estimations of the detection rate of geoduck (show-factor) using counts of siphon holes. Studies were restricted to less than 17 m water depth. Geoduck in Kennedy Bay were found from 4-8 m water depth, whereas geoduck in Wellington Harbour occurred in several separate beds from 4-16 m. In Wellington Harbour, there was a pattern of increasing numbers with depth up to ~15 m. Numbers seemed to decrease thereafter. Analysis of sediment samples indicated that P. zelandica was more prevalent in fine sand to fine silty sand substrates. P. abrupta is found in similar habitats. There was no significant difference in the show-factor (the proportion of geoduck detectable by sight or touch vs. the actual number of geoduck present) of geoduck with respect to season (summer and winter), region (Wellington Harbour and Kennedy Bay), or tidal height (low, mid, and high tide).

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http://hdl.handle.net/10453/8644