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Type: Journal article
Title: Extrinsic and intrinsic factors shape the ability of using otolith chemistry to characterize estuarine environmental histories
Author: Reis-Santos, P.
Vasconcelos, R.
Tanner, S.
Fonseca, V.
Cabral, H.
Gillanders, B.
Citation: Marine Environmental Research, 2018; 140:332-341
Publisher: Elsevier
Issue Date: 2018
ISSN: 0141-1136
Statement of
Patrick Reis-Santos, Rita P. Vasconcelos, Susanne E. Tanner, Vanessa F. Fonseca, Henrique N. Cabral, Bronwyn M. Gillanders
Abstract: Reconstructing habitat use and environmental histories of fish via otolith chemistry relies on linking otolith chemical composition to the surrounding environment, as well as disentangling the consequences of ontogenetic or physiological effects that may mask environmental signals. We used multiple linear and linear mixed models to analyse the importance of environmental (temperature, salinity, water chemistry) and individual based (fish size) factors on otolith chemical composition and incorporation (Li, Mg, Mn, Sr, and Ba) of juvenile Dicentrarchus labrax, over their time within an estuarine nursery area. Multi model inference highlighted the importance of ontogeny, as well as the influence of temperature and salinity on otolith chemistry and elemental incorporation, with results indicating that intrinsic effects may potentially outweigh environmental effects. Ultimately, understanding if otolith chemistry accurately reflects fine-scale environmental variation is key to reconstruct environmental histories of juvenile fishes in estuaries and will contribute to determining the impact changing estuarine conditions may have on growth and survival.
Keywords: Fish; biogeochemistry; nursery; mixed-effects modelling; partition coefficient; ontogeny; Tejo estuary; trace elements
Rights: © 2018 Elsevier Ltd. All rights reserved.
RMID: 0030094362
DOI: 10.1016/j.marenvres.2018.06.002
Appears in Collections:Earth and Environmental Sciences publications

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