Genetic identity determines risk of post-settlement mortality of a marine fish Vigliola, Laurent Doherty, Peter J. Meekan, Mark G. Drown, Devin M. Jones, M. Elizabeth Barber, Paul H. 2011-07-21T15:27:19Z 2011-07-21T15:27:19Z 2007-05
dc.description Author Posting. © Ecological Society of America, 2007. This article is posted here by permission of Ecological Society of America for personal use, not for redistribution. The definitive version was published in Ecology 88 (2007): 1263–1277, doi:10.1890/06-0066. en_US
dc.description.abstract Longitudinal sampling of four cohorts of Neopomacentrus filamentosus, a common tropical damselfish from Dampier Archipelago, Western Australia, revealed the evolution of size structure after settlement. Light traps collected premetamorphic individuals from the water column (“settlers”) to establish a baseline for each cohort. Subsequently, divers collected benthic juveniles (“recruits”) at 1–3-month intervals to determine the relative impacts of post-settlement mortality during the first three months. Growth trajectories for individual fish were back-calculated from otolith records and compared with nonlinear mixed-effects models. Size-selective mortality was detected in all cohorts with the loss of smaller, slower growing individuals. Three months after settlement, recruits showed significantly faster growth as juveniles, faster growth as larvae, and larger sizes as hatchlings. The timing and intensity of post-settlement selection differed among cohorts and was correlated with density at settlement. The cohort with the greatest initial abundance experienced the strongest selective mortality, with most of this mortality occurring between one and two months after settlement when juveniles began foraging at higher positions in the water column. Significant genetic structure was found between settlers and three-month-old recruits in this cohort as a result of natural selection that changed the frequency of mtDNA haplotypes measured at the control region. The extent of this genetic difference was enlarged or reduced by artificially manipulating the intensity of size-based selection, thus establishing a link between phenotype and haplotype. Sequence variation in the control region of the mitochondrial genome has been linked to mitochondrial efficiency and weight gain in other studies, which provides a plausible explanation for the patterns observed here. en_US
dc.description.sponsorship The project was funded by the Australian Institute of Marine Science, the Australian European Award Program, le Ministe` re franc¸ ais des Affaires Etrange` res, ARC-DEET, Boston University, and the National Science Foundation (Biological Oceanography, OCE 0349177). en_US
dc.format.mimetype application/pdf
dc.identifier.citation Ecology 88 (2007): 1263–1277 en_US
dc.identifier.doi 10.1890/06-0066
dc.language.iso en_US en_US
dc.publisher Ecological Society of America en_US
dc.subject Growth rates en_US
dc.subject Haplotypes en_US
dc.subject Larval and juvenile fish en_US
dc.subject Maternal and genetic inheritance en_US
dc.subject Mortality en_US
dc.subject mtDNA en_US
dc.subject Otoliths en_US
dc.subject Predation en_US
dc.subject Recruitment en_US
dc.subject Settlement en_US
dc.subject Size selection en_US
dc.title Genetic identity determines risk of post-settlement mortality of a marine fish en_US
dc.type Article en_US
dspace.entity.type Publication
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