Otolith chemistry: an aid to stock separation of Helicolenus dactylopterus (bluemouth) and Merluccius merluccius (European hake) in the Northeast Atlantic and Mediterranean

Swan, Sarah; Geffen, Audrey J.; Morales‐Nin, Beatriz; Gordon, J. D. M.; Shimmield, Tracy M; Sawyer, Terrie; Massutí, Enric

doi:10.1016/j.icesjms.2005.08.012

Cited by 60 publications

(49 citation statements)

References 39 publications

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“…Mg is one of the most important elements in otoliths separating fish from deepwater areas. Swan et al (2006) found that Mg along with Pb were important for differentiating deep water fish stocks of the European hake, Merluccius merluccius, in the northeastern Atlantic. The otolith chemistry results were consistent with the treatment of a northern stock west of Norway and a southern stock off Portugal that were separated by an oceanographic and bathymetric feature, the Bay of Biscay.…”

Section: Discussionmentioning

confidence: 95%

Otolith elemental signatures reflect residency in coastal water masses

et al. 2010

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We examined variability in otolith chemistry of wild caught fish in relation to in situ temperature and salinity within the California Current System. Barium, magnesium, and iron from the most recent growth zone in otoliths differentiated pelagic juvenile shortbelly rockfish (Sebastes jordani) residing in water masses with distinct temperature and salinity properties from central and southern California spanning nearly 500 km of coastline. The 3-element signature also discriminated fish that resided in different water masses that were associated with mesoscale cyclonic eddy circulation in the Santa Barbara Channel. Variability in otolith chemistry reflected the spatial patterns of both horizontal gradients and vertical gradients in water mass properties related to circulation. Although we found that the concentrations of particular elements in otoliths were correlated to ambient temperature or salinity, we suggest that these parameters are more useful as an identifying signature of distinct water masses associated with unique otolith signatures rather than as factors directly affecting otolith chemistry. Other factors varying among the water masses or among the fish populations residing in the water masses may also affect otolith chemistry. We discuss how oceanographic phenomena associated with the 1997-1998 El Niño and the persistent, recirculating eddy in the Channel may have affected coastal ocean conditions and variation in otolith chemistry of fish in the study area.

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Section: Discussionmentioning

confidence: 95%

Otolith elemental signatures reflect residency in coastal water masses

et al. 2010

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“…It is of fundamental importance to address this issue for improvement of stock assessments and for common stock management, because these estuarine environments are significant nursery areas for several highly commercial species intensively fished within the European Union. In recent years, research has been focused mainly on stock discrimination or natal origin of marine species in the North Eastern Atlantic, Mediterranean and North seas (Rooker et al 2003, Swan et al 2006.…”

Section: Discussionmentioning

confidence: 99%

Discriminating estuarine nurseries for five fish species through otolith elemental fingerprints

Vasconcelos

Patrick²,

Tanner³

et al. 2007

Mar. Ecol. Prog. Ser.

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Chemical composition of otoliths may provide valuable information in establishing connectivity between nursery grounds and marine coastal stocks. Juveniles of the commercially important fish species Solea solea, S. senegalensis, Platichthys flesus, Diplodus vulgaris and Dicentrarchus labrax were captured in 8 estuarine nursery grounds along the Portuguese coast in July 2005. Concentrations of Li, Na, Mg, K, Mn, Ni, Cu, Zn, Sr, Cd, Ba and Pb were determined in whole juvenile otoliths using solution-based inductively coupled plasma mass spectrometry. Significant differences in the concentration of several elements were found between estuaries and species using ANOVA and MANOVA. Linear discriminant function analysis classified otolith fingerprints between estuaries for all species with good cross-validated results. Depending on the species, 70.2 to 92.0% of individuals were correctly assigned to their estuary of origin, with discrimination success varying with species, estuaries and number of estuaries in the analysis. Since accurate classification of juvenile fish to their nursery estuary was achieved, fingerprint analysis can be used as a natural habitat tag in assigning adult fish to their estuarine nursery. Ultimately the connectivity between Portuguese estuarine nursery grounds and coastal areas may be estimated, with possible implications for future fisheries and coastal management plans. KEY WORDS: Otolith microchemistry · Fingerprint · Juvenile fish · Estuary · Nursery · PortugalResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 350: 117-126, 2007 (Kalish 1990, Tsukamoto & Arai 2001, (2) populations or stocks of fish (Campana 1999, Rooker et al. 2003 and (3) natal origin to near shore and estuarine habitats , Thorrold et al. 1998a, Dorval et al. 2005, Brown 2006a. This is possible due to some particular properties of otoliths reviewed by Campana (1999), Thresher (1999) and Elsdon & Gillanders (2003). Briefly, otoliths are metabolically inert and trace element uptake reflects the surrounding physical and chemical environment, although incorporation of some elements is affected by physiological regulation. Otoliths are deposited continually and contain daily and annual growth rings that can be used as life-history records reflecting habitat change through time, providing good natural tags of habitat use.Taking into account otolith properties, coastal fish that spent their juvenile period in estuaries are expected to have an otolith elemental composition which reflects their estuarine life period. The elemental composition of whole juvenile otoliths is commonly used to discriminate juvenile sites of origin as it is representative of the juvenile habitat (Thorrold et al. 1998a, Gillanders & Kingsford 2000, De Pontual et al. 2000, Dorval et al. 2005, Brown 2006b). Analysis of different regions of otoliths gives information on separate periods of ontogenetic development of the individuals. Point measurements done across daily or annual increments have be...

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“…The value of Mg, Mn, and Cu for identification of fish habitat by otolith fingerprints has already been acknowledged (e.g. Swan et al 2006, Clarke et al 2009, Tanner et al 2011, although the exact roles played by physiological effects, bioavailability, and water temperature in defining their final otolith concentrations remain unclear (Tanner et al 2011). In our case, the spatial differences in otolith concentrations observed largely reflect differences in physicochemical conditions and element bioavailability between the 4 habitats, under the combined influence of Rhône River inputs to the marine coastal zone and the Thau and Mauguio lagoons (Accornero et al 2008, Ollivier et al 2011, minor localized pollutions by Cu and Cr in the Salses-Leucate lagoon (IFREMER 2009), and differences in water temperature and salinity between the lagoons and the sea (Cacho et al 1999, IFREMER 2008.…”

Section: Methodological Limitations and Usefulness Of Multi-elementalmentioning

confidence: 99%

Multi-element otolith fingerprints unravel sea−lagoon lifetime migrations of gilthead sea bream Sparus aurata

Mercier¹,

Mouillot²,

Bruguier³

et al. 2012

Mar. Ecol. Prog. Ser.

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Precise knowledge of lifetime migrations is vital in exploited fish species, since all essential habitats must be protected to maintain sustainable stock levels. The present study used multi-element otolith fingerprints of the gilthead sea bream Sparus aurata (L.) to discriminate its main juvenile and adult habitats in the Languedoc-Roussillon region (Gulf of Lions, northwest Mediterranean) and infer the lifetime migrations of 12 individuals from the area (11 from the present day and 1 from the Roman era). This allowed for the first time the identification of key habitats for the successful completion of the species' life cycle in the Gulf of Lions, and the connectivity between them. Our results revealed that lagoon use by S. aurata is probably ancient (> 2500 yr) and confirmed its current commonness. Yet, although most observed migration patterns were in accordance with the migratory behavior previously described for the species, strong inter-individual variations and new patterns in habitat use were detected. At the juvenile stage, a preference for shallow lagoons with low salinities was evidenced. Nevertheless, the first year of life can also be successfully completed in marine conditions. At the adult stage, lagoon use was shown to occur until at least age 4 yr, with periods of lagoon residency of up to 11 mo in a year, often including winter months. Because overwintering in the lagoons was previously thought to be impossible for S. aurata due to low temperatures, this finding has important implications for future stock management, especially since the species breeds in winter. KEY WORDS: Otolith microchemistry · Trace elements · Random forest · Key habitats · Gulf of LionsResale or republication not permitted without written consent of the publisher

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Otolith chemistry: an aid to stock separation of Helicolenus dactylopterus (bluemouth) and Merluccius merluccius (European hake) in the Northeast Atlantic and Mediterranean

Cited by 60 publications

References 39 publications

Otolith elemental signatures reflect residency in coastal water masses

Otolith elemental signatures reflect residency in coastal water masses

Discriminating estuarine nurseries for five fish species through otolith elemental fingerprints

Multi-element otolith fingerprints unravel sea−lagoon lifetime migrations of gilthead sea bream Sparus aurata

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