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The effect of dispersal and temperature on the early life history of a temperate marine fish


Tracey, SR and Hartmann, K and Hobday, AJ, The effect of dispersal and temperature on the early life history of a temperate marine fish, Fisheries Oceanography, 21, (5) pp. 336-347. ISSN 1365-2419 (2012) [Refereed Article]

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Copyright 2012 Blackwell Publishing Ltd.

DOI: doi:10.1111/j.1365-2419.2012.00628.x


Understanding the mechanisms that influence the successful recruitment of marine species is one of the great challenges in marine science, particularly for species that undergo a protracted larval phase. Here we apply a bio-physical individual-based model (IBM) which couples data from a high-resolution oceanographic model with temperature-related survival characteristics for the early life stage of a temperate marine fish. The IBM was run retrospectively for the years 1993–2007 with spawning locations occurring around Tasmania, Australia. Meso-scale oceanographic features led to individuals spawned on the west coast, and to a lesser extent the south coast, being washed ashore prior to achieving a competent size to actively influence their migratory paths. Individuals spawned on the east coast had significantly higher survival rates. Temperature-induced mortality was relatively consistent across years. This indicates that the dispersal envelopes, of pre-flexion larvae, across all years are predominately within the thermal niche of this species. To further understand the effect of temperature on survival we integrated global climate model warming scenarios into the model. The results indicated that around the year 2050 the predicted warming would have a minor positive effect on the survival of individuals but by 2100 the pejus temperature will frequently be exceeded leading to a significant decline in survival, particularly towards the northern end of the dispersal range.

Item Details

Item Type:Refereed Article
Keywords:climate change, ocean warming, spatial management, thermal niche
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Aquaculture and fisheries stock assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Wild caught fin fish (excl. tuna)
UTAS Author:Tracey, SR (Associate Professor Sean Tracey)
UTAS Author:Hartmann, K (Dr Klaas Hartmann)
ID Code:78755
Year Published:2012
Web of Science® Times Cited:8
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2012-07-24
Last Modified:2013-05-07

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