Environmentally mediated trends in otolith composition of juvenile Atlantic cod (Gadus morhua)
Stanley, Ryan R. E.
Bradbury, Ian R.
Snelgrove, Paul V. R.
Thorrold, Simon R.
Killen, Shaun S.
MetadataShow full item record
We evaluated the influence of environmental exposure of juvenile Atlantic cod (Gadus morua) to inform interpretations of natal origins and movement patterns using otolith geochemistry. Laboratory rearing experiments were conducted with a variety of temperature (~ 5, 8.5 and 12 °C) and salinity (~ 25, 28.5 and 32 PSU) combinations. We measured magnesium (Mg), manganese (Mn), strontium (Sr) and barium (Ba), expressed as a ratio to calcium (Ca), using laser ablation inductively coupled plasma mass spectrometry (ICP-MS), and stable carbon (δ13C) and oxygen (δ18O) isotopes using isotope ratio monitoring mass spectrometry. Temperature and salinity significantly affected all elements and isotopes measured, with the exception of salinity on Mg:Ca. We detected significant interactions among temperature and salinity for Mn:Ca and Ba:Ca partition coefficients (ratio of otolith chemistry to water chemistry), with significant temperature effects only detected in the 32 and 28.5 PSU salinity treatments. Similarly, we detected a significant interaction between temperature and salinity in incorporation of δ13C, with a significant temperature effect except at intermediate salinity. These results support the contention that environmental mediation of otolith composition varies among species, thus limiting the ability of generalized models to infer life history patterns from chemistry. Our results provide essential baseline information detailing environmental influence on juvenile Atlantic cod otolith composition, punctuating the importance of laboratory validations to translate species-specific otolith composition when inferring in situ life histories and movements.
Author Posting. © The Author(s), 2015. This is the author's version of the work. It is posted here by permission of Oxford University Press for personal use, not for redistribution. The definitive version was published in ICES Journal of Marine Science 72 (2015): 2350-2363, doi: 10.1093/icesjms/fsv070.
Suggested CitationPreprint: Stanley, Ryan R. E., Bradbury, Ian R., DiBacco, Claudio, Snelgrove, Paul V. R., Thorrold, Simon R., Killen, Shaun S., "Environmentally mediated trends in otolith composition of juvenile Atlantic cod (Gadus morhua)", 2015-04, https://doi.org/10.1093/icesjms/fsv070, https://hdl.handle.net/1912/7775
Showing items related by title, author, creator and subject.
Migratory patterns of American shad (Alosa sapidissima) revealed by natural geochemical tags in otoliths Walther, Benjamin D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-02)Geochemical signatures in the otoliths of diadromous fishes may allow for retrospective analyses of natal origins. In an assessment of river-specific signatures in American shad (Alosa sapidissima), an anadromous clupeid ...
Temperature and salinity effects on magnesium, manganese, and barium incorporation in otoliths of larval and early juvenile spot Leiostomus xanthurus Martin, Gretchen Bath; Thorrold, Simon R. (Inter-Research, 2005-06-02)The use of otolith chemistry to delineate fish populations and trace migration pathways is premised on a significant correlation between the elemental composition of otoliths and physicochemical properties of the ambient ...
Water, not food, contributes the majority of strontium and barium deposited in the otoliths of a marine fish Walther, Benjamin D.; Thorrold, Simon R. (Inter-Research, 2006-04-13)We quantified the relative contributions of water and food to strontium (Sr) and barium (Ba) deposited in otoliths of juvenile mummichogs Fundulus heteroclitus. Fish were reared in seawater spiked with 86Sr and 137Ba ...