eCite Digital Repository

Empirical models to identify mechanisms driving reductions in tissue mercury concentration during culture of farmed bluefin tuna Thunnus maccoyii

Citation

Balshaw, S and Edwards, JW and Ross, KE and Ellis, DC and Padula, D and Daughtry, BJ, Empirical models to identify mechanisms driving reductions in tissue mercury concentration during culture of farmed bluefin tuna Thunnus maccoyii, Marine Pollution Bulletin, 56, (12) pp. 2009 - 2017. ISSN 0025-326X (2008) [Refereed Article]

DOI: doi:10.1016/j.marpolbul.2008.08.007

Abstract

Two empirical models are presented to elucidate the mechanisms driving reductions in the mercury concentration of southern bluefin tuna (SBT) during culture. Model 1 predicts temporal fluctuations in mercury concentration in response to growth dilution. Model 2 predicts the combined effects of growth dilution and linear mercury accumulation. Model 2 was found to be the more accurate model. Over a typical farming period of 136 days, growth dilution resulted in a reduction in mean mercury concentration of SBT edible tissues from 0.51 mg/kg down to 0.33 mg/kg. Extended culture beyond 136 days resulted in an increase in mercury concentration due to the combined effects of mercury accumulation and seasonal lipid depletion. Results indicate that under current industry practice, cultured SBT can be consumed twice as frequently as that of wild caught SBT while maintaining total dietary mercury intake below national recommendations. © 2008 Elsevier Ltd. All rights reserved.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquaculture
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Aquaculture Tuna
Author:Ellis, DC (Mr David Ellis)
Author:Padula, D (Mr David Padula)
ID Code:55457
Year Published:2008
Web of Science® Times Cited:13
Deposited By:NC Marine Conservation and Resource Sustainability
Deposited On:2009-03-11
Last Modified:2009-03-30
Downloads:0

Repository Staff Only: item control page