Influence of seasonal and latitudinal temperature variation on early life-history traits of a coral reef fish

Takahashi, Miwa, McCormick, Mark, Munday, Philip, and Jones, Geoffrey (2012) Influence of seasonal and latitudinal temperature variation on early life-history traits of a coral reef fish. Marine and Freshwater Research, 63. pp. 856-864.

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Temporal and latitudinal gradients in ocean temperature may be useful for predicting the likely responses of marine species to accelerating global warming. Here, we examined seasonal variations in early life-history traits of the reef fish Pomacentrus moluccensis at Lizard Island on the Great Barrier Reef (GBR). Latitudinal variations were then compared among three locations from Kimbe Bay in Papua New Guinea to the southern GBR (18° latitude). At Lizard Island, a 4°C temperature rise from spring to summer was correlated with a 0.13 mm day⁻¹ increase in pre-settlement growth rates and a 3.28-day decrease in pelagic larval duration (PLD). The latitudinal comparison revealed a non-linear relationship where growth rate and settlement size declined and PLD increased at Kimbe Bay where temperature was the highest of all the study sites. Furthermore, the slopes of latitudinal variations in life-history traits as a function of temperature within the GBR were significantly steeper than those in the temporal analysis. These latitudinal patterns were likely to be shaped by (1) the species thermal reaction norm, (2) local adaptation or (3) location-specific environmental and demographic characteristics. The significant correlations of early life-history traits with natural temperature gradients emphasise the potential sensitivity of reef fish larvae to global warming.

Item ID: 24334
Item Type: Article (Research - C1)
ISSN: 1323-1650
Keywords: climate change, larval growth rate, latitudinal comparison, life-history plasticity, pelagic larval duration, thermal reaction norm
Date Deposited: 02 Jan 2013 00:17
FoR Codes: 06 BIOLOGICAL SCIENCES > 0699 Other Biological Sciences > 069902 Global Change Biology @ 40%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060308 Life Histories @ 30%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 30%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960307 Effects of Climate Change and Variability on Australia (excl. Social Impacts) @ 20%
96 ENVIRONMENT > 9603 Climate and Climate Change > 960310 Global Effects of Climate Change and Variability (excl. Australia, New Zealand, Antarctica and the South Pacific) @ 50%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 30%
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