creators_name: Wildish, DJ
creators_name: Hargrave, BT
creators_name: MacLeod, C
creators_name: Crawford, CM
creators_id: 
creators_id: 
creators_id: Catriona.Macleod@utas.edu.au
creators_id: Christine.Crawford@utas.edu.au
type: article
datestamp: 2008-05-29 00:57:00
lastmod: 2008-07-18 11:01:14
metadata_visibility: show
title: Detection of organic enrichment near finfish net-pens by sediment profile imaging at SCUBA-accessible depths
ispublished: pub
subjects: 300804
subjects: 300703
subjects: 260104
full_text_status: restricted
keywords: SPI; Organic enrichment; Net-pens; SCUBA
note: The definitive version is available at http://www.sciencedirect.com
abstract: Sediment profile images (SPI) of cores collected by SCUBA diver were obtained using a modified Hargrave corer from fish farm sites in the Bay of Fundy, Canada and southeastern Tasmania, Australia. Shipboard and land based photography were used to obtain the SPI with a tripod mounted digital camera and image analysis by commercially available software. Computer images were analyzed to determine the variables used by Nilsson and Rosenberg [Mar. Ecol., Prog. Ser. 197 (2000) 139], modified to account for non-equilibrium conditions, to assess successional stages of organic enrichment. To validate the method, we concurrently sampled macrofaunal species composition and abundance and measured profiles of redox potentials and total sulphides by ion analysis. In each case, the null hypothesis that sediments collected directly under an active salmon net-pen were indistinguishable from a nearby reference site was rejected. The SPI method can successfully detect organic enrichment where impacts occur in soft sediments in geographically diverse locations.
date: 2003-02
date_type: published
publication: Journal of Experimental Marine Biology and Ecology
volume: 285-286
pagerange: 403-413
id_number: 10.1016/S0022-0981(02)00540-3
refereed: TRUE
issn: 0022-0981
official_url: http://dx.doi.org/10.1016/S0022-0981(02)00540-3
citation: Wildish, DJ and Hargrave, BT and MacLeod, C and Crawford, CM (2003) Detection of organic enrichment near finfish net-pens by sediment profile imaging at SCUBA-accessible depths. Journal of Experimental Marine Biology and Ecology, 285-286 . pp. 403-413. ISSN 0022-0981
document_url: http://eprints.utas.edu.au/6627/1/Wildish_et_al_2003.pdf