EARLY-LIFE HISTORY
; CLIMATE-CHANGE
; HIGH CO2
; CARBONIC-ACID
; FISH
; IMPACTS
; ADAPTATION
; FISHERIES
; SOFTWARE
; DISSOCIATION
WOS学科分类:
Ecology
WOS研究方向:
Environmental Sciences & Ecology
英文摘要:
Estimating the heritability and genotype by environment (GxE) interactions of performance-related traits (e.g., growth, survival, reproduction) under future ocean conditions is necessary for inferring the adaptive potential of marine species to climate change. To date, no studies have used quantitative genetics techniques to test the adaptive potential of large pelagic fishes to the combined effects of elevated water temperature and ocean acidification. We used an experimental approach to test for heritability and GxE interactions in morphological traits of juvenile yellowtail kingfish, Seriola lalandi, under current-day and predicted future ocean conditions. We also tracked the fate of genetic diversity among treatments over the experimental period to test for selection favoring some genotypes over others under elevated temperature and CO2. Specifically, we reared kingfish to 21 days post hatching (dph) in a fully crossed 2 x 2 experimental design comprising current-day average summer temperature (21 degrees C) and seawater pCO(2) (500 mu atm CO2) and elevated temperature (25 degrees C) and seawater pCO(2) (1,000 mu atm CO2). We sampled larvae and juveniles at 1, 11, and 21 dph and identified family of origin of each fish (1,942 in total) by DNA parentage analysis. The animal model was used to estimate heritability of morphological traits and test for GxE interactions among the experimental treatments at 21 dph. Elevated temperature, but not elevated CO2 affected all morphological traits. Weight, length and other morphological traits in juvenile yellowtail kingfish exhibited low but significant heritability under current day and elevated temperature. However, there were no measurable GxE interactions in morphological traits between the two temperature treatments at 21 dph. Similarly, there was no detectable change in any of the measures of genetic diversity over the duration of the experiment. Nonetheless, one family exhibited differential survivorship between temperatures, declining in relative abundance between 1 and 21 dph at 21 degrees C, but increasing in relative abundance between 1 and 21 dph at 25 degrees C. This suggests that this family line could perform better under future warming than in current-day conditions. Our results provide the first preliminary evidence of the adaptive potential of a large pelagic fisheries species to future ocean conditions.
1.James Cook Univ, Australian Res Council, Ctr Excellence Coral Reef Studies, Townsville, Qld, Australia 2.Univ Hong Kong, Swire Inst Marine Sci, Sch Biol Sci, Hong Kong, Peoples R China 3.King Abdullah Univ Sci & Technol, Div Biol & Environm Sci & Engn, KAUST Environm Epigenet Program, Thuwal, Saudi Arabia 4.Univ Canberra, Insitute Appl Ecol, Bruce, ACT, Australia 5.Natl Inst Water & Atmospher Res Ltd, Auckland, New Zealand 6.Univ Auckland, Inst Marine Sci, Auckland, New Zealand 7.Natl Inst Water & Atmospher Res, Northland Marine Res Ctr, Ruakaka, New Zealand 8.Okinawa Inst Sci & Technol Grad Univ, Marine Climate Change Unit, Onna Son, Japan 9.Pacific Community, Ocean Fisheries Programme, Noumea, New Caledonia 10.James Cook Univ, Trop Futures Inst, Singapore, Singapore
Recommended Citation:
Munday, Philip L.,Schunter, Celia,Allan, Bridie J. M.,et al. Testing the Adaptive Potential of Yellowtail Kingfish to Ocean Warming and Acidification[J]. FRONTIERS IN ECOLOGY AND EVOLUTION,2019-01-01,7