Evidence of sustained populations of a small reef fish on artificial structures. Does depth affect production on artificial reefs?

Fowler, AM; Booth, DJ

Evidence of sustained populations of a small reef fish on artificial structures. Does depth affect production on artificial reefs?

Fowler, AM

Booth, DJ

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Publication Type:: Journal Article
Citation:: Journal of Fish Biology, 2012, 80 (3), pp. 613 - 629
Issue Date:: 2012-03-01

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Field	Value	Language
dc.contributor.author	Fowler, AM https://orcid.org/0000-0003-3075-7066	en_US
dc.contributor.author	Booth, DJ https://orcid.org/0000-0002-8256-1412	en_US
dc.date.issued	2012-03-01	en_US
dc.identifier.citation	Journal of Fish Biology, 2012, 80 (3), pp. 613 - 629	en_US
dc.identifier.issn	0022-1112	en_US
dc.identifier.uri	http://hdl.handle.net/10453/32195
dc.description.abstract	The length frequencies and age structures of resident Pseudanthias rubrizonatus (n = 407), a small protogynous serranid, were measured at four isolated artificial structures on the continental shelf of north-western Australia between June and August 2008, to determine whether these structures supported full (complete size and age-structured) populations of this species. The artificial structures were located in depths between 82 and 135 m, and growth rates of juveniles and adults, and body condition of adults, were compared among structures to determine the effect of depth on potential production. All life-history stages, including recently settled juveniles, females and terminal males, of P. rubrizonatus were caught, ranging in standard length (L s) from 16·9 to 96·5 mm. Presumed ages estimated from whole and sectioned otoliths ranged between 22 days and 5 years, and parameter ±s.e. estimates of the von Bertalanffy growth model were L ∞ = 152 ± 34 mm, k = 0·15(±0·05) and t 0 = -1·15(±0·15). Estimated annual growth rates were similar between shallow and deep artificial structures; however, otolith lengths and recent growth of juveniles differed among individual structures, irrespective of depth. The artificial structures therefore sustained full populations of P. rubrizonatus, from recently settled juveniles through to adults; however, confirmation of the maximum age attainable for the species is required from natural populations. Depth placement of artificial reefs may not affect the production of fish species with naturally wide depth ranges. © 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.	en_US
dc.relation.ispartof	Journal of Fish Biology	en_US
dc.relation.isbasedon	10.1111/j.1095-8649.2011.03201.x	en_US
dc.subject.classification	Fisheries	en_US
dc.subject.mesh	Animals	en_US
dc.subject.mesh	Bass	en_US
dc.subject.mesh	Body Size	en_US
dc.subject.mesh	Ecosystem	en_US
dc.subject.mesh	Population Dynamics	en_US
dc.subject.mesh	Western Australia	en_US
dc.subject.mesh	Female	en_US
dc.subject.mesh	Male	en_US
dc.subject.mesh	Coral Reefs	en_US
dc.title	Evidence of sustained populations of a small reef fish on artificial structures. Does depth affect production on artificial reefs?	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	80	en_US
utslib.for	0602 Ecology	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
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	80	en_US

Abstract:

The length frequencies and age structures of resident Pseudanthias rubrizonatus (n = 407), a small protogynous serranid, were measured at four isolated artificial structures on the continental shelf of north-western Australia between June and August 2008, to determine whether these structures supported full (complete size and age-structured) populations of this species. The artificial structures were located in depths between 82 and 135 m, and growth rates of juveniles and adults, and body condition of adults, were compared among structures to determine the effect of depth on potential production. All life-history stages, including recently settled juveniles, females and terminal males, of P. rubrizonatus were caught, ranging in standard length (L s) from 16·9 to 96·5 mm. Presumed ages estimated from whole and sectioned otoliths ranged between 22 days and 5 years, and parameter ±s.e. estimates of the von Bertalanffy growth model were L ∞ = 152 ± 34 mm, k = 0·15(±0·05) and t 0 = -1·15(±0·15). Estimated annual growth rates were similar between shallow and deep artificial structures; however, otolith lengths and recent growth of juveniles differed among individual structures, irrespective of depth. The artificial structures therefore sustained full populations of P. rubrizonatus, from recently settled juveniles through to adults; however, confirmation of the maximum age attainable for the species is required from natural populations. Depth placement of artificial reefs may not affect the production of fish species with naturally wide depth ranges. © 2012 The Authors. Journal of Fish Biology © 2012 The Fisheries Society of the British Isles.

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http://hdl.handle.net/10453/32195