Electron probe microanalysis of fish otoliths — evaluation of techniques for studying age and stock discrimination

Gunn, John; Harrowfield, I. R.; Proctor, Craig; Thresher, Ronald E.

doi:10.1016/0022-0981(92)90306-u

Cited by 94 publications

(58 citation statements)

References 42 publications

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“…The wavelength dispersive spectrum was measured for 120 s at peak positions and 20 s at background positions for Sr Lα and at 20 s and 10 s for Ca Kα. The beam power density of 2.3 W m 2 was within the range of 0.5 to 3 W m 2 suggested by Gunn et al (1992), and the counting time was sufficient to ensure effective measurement. Calcite (CaCO 3 ; NMNH 136321) and strontiantite (SrCO 3 ; NMNH R10065) were used as standards.…”

Section: Methodsmentioning

confidence: 80%

Migratory behaviour and habitat use by American eels Anguilla rostrata as revealed by otolith microchemistry

Jessop¹,

Shiao²,

Iizuka³

et al. 2002

Mar. Ecol. Prog. Ser.

130

161

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Section: Methodsmentioning

confidence: 80%

Migratory behaviour and habitat use by American eels Anguilla rostrata as revealed by otolith microchemistry

Jessop¹,

Shiao²,

Iizuka³

et al. 2002

Mar. Ecol. Prog. Ser.

130

161

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“…This method is increasingly being used to help researchers understand the environmental history of fish movements (Radtke and Shafer, 1992), population structure (Thresher et al, 1994), and identification of spawning estuaries (Milton et al, 1997). It has been used to discriminate between fish stocks of southern hemisphere species (Edmons et al, 1991;Gunn et al, 1992;Gillanders and Kingsford, 2003;Patterson et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Otolith chemical composition as a useful tool for sciaenid stock discrimination in the south-western Atlantic

Volpedo¹,

Cirelli²

2006

Sci. Mar.

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SUMMARY: Striped weakfish (Cynoscion guatucupa) and whitemouth croaker (Micropogonias furnieri) are important commercial and recreational species found in abundance along the South American Atlantic coast. In recent years otolith chemical composition has been used as a tool for identifying fish stocks for several species. The chemical composition of C. guatucupa and M. furnieri otoliths was determined by inductively coupled plasma-optical emission spectrometry (ICP-OES) in samples from coastal sites (Partido de La Costa, Mar del Plata and San Blás Bay). Significant differences in the ratios of Mg/Ca, Mn/Ca and Sr/Ca for C. guatucupa otoliths and Cd/Ca, Cu/Ca, Mg/Ca, Sr/Ca and Zn/Ca for M. furnieri otoliths suggest the existence of two different fish stocks, one originating in the north (including Samborombón Bay and Partido de La Costa fisheries) and another originating in the south (including "El Rincón" and San Blás fisheries). These results agree with previous studies on the same species using different methodologies. These stocks may be separated by an oceanographic barrier, the "Frente El Rincón". Otolith chemical composition has not been previously used in South America for identifying fish stocks and may be a simple, quick and useful tool for the sustainable exploitation and management of commercial species. -La pescadilla de red (Cynoscion guatucupa) y la corvina rubia (Micropogonias furnieri) son especies de importancia comercial y recracional abundantes a lo largo de la costa atlántica sudamericana. En recientes años, la composición química del otolito es utilizada como una herramienta para la identificación de stocks pesqueros. La composición química de los otolitos de C. guatucupa y M. furnieri se determino por espectrómetro de emisión atómica (ICP-OES) en muestras provenientes de localidades costeras (Partido de La Costa, Mar del Plata y Bahía San Blás). Se hallaron diferencias significativas en las relaciones Mg/Ca, Mn/Ca y Sr/Ca para C. guatucupa y en Cd/Ca, Cu/Ca, Mg/Ca, Sr/Ca y Zn/Ca para M. furnieri, lo que sugiere la existencia de dos diferentes stocks pesqueros, uno originado en el norte (que incluye las pesquerías de Bahía Samborombón y del Partido de La Costa) y otro stock, originado en el sur (que incluye las pesquerías de "El Rincón" y Bahía Blás). Estos resultados coinciden con los hallados en estudios previos utilizando diferentes metodologías. Estos stocks pueden estar separados por un barrera oceanografía el "Frente El Rincón". La composición química del otolito se utilizo por primera vez en Sudamerica para la identificación de stocks pesqueros, siendo un método fácil, rápido y una herramienta útil para el manejo y explotación sustentable de especies comerciales. KeywordsPalabras clave: composición química de los otolitos, discriminación de stocks, Cynoscion guatucupa, Micropogonias furnieri.

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“…There is likely to be a closer relationship between ambient water chemistry and concentration in the otolith for some elements than for others, due to the properties of the element itself Differences in water chemistry between environments (e.g. estuaries and rocky reefs) may occur, enabling calcified tissues to retain a chemical record that can be related to the age of the fish and the physical and chemical properties of its environment (Radtke et al 1990, Gunn et al 1992, Radtke & Shafer 1992, Kalish 1993. Differences in chemical components between layers of calcified tissues may therefore indicate past environments inhabited by individual fish and possible patterns of movement.…”

Section: Introductionmentioning

confidence: 99%

Elements in otoliths may elucidate the contribution of estuarine recruitment to sustaining coastal reef populations of a temperate reef fish

Bm¹,

Kingsford²

1996

Mar. Ecol. Prog. Ser.

188

121

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ABSTRACT. Estuaries and associated seagrass habitats are thought to be important nursery areas for many fishes. There is, however, no direct evidence for movement of fish from estuaries to reefs. The alm of this study was to determine if populations of Achoerodus viridis (Labridae) on rocky reefs were sustained by (1) recruitment to estuarine seagrass habitat followed by m o \ i e~~~c n t to rocky reefs, (2) direct recruitment to rocky reefs, or (3) a combination of the two. Recruits were collected from estuarine seagrass and rocky reef habitats and elements in their otoliths analysed by inductively coupled plasmamass spectrometry (ICP-MS) to determine if d~fferent 'elemental fingerprints' could be found. Higher concentrations of Zn, AI, Pb, Mn, Ba and CO were found in otoliths of recruits from estuar~ne seagrass habitat than In otoliths of recruits from coastal reefs, the latter 3 elements showing sign~ficant differences. Strontium occurred in significantly h~g h e r concentrations in otoliths of recruits from coastal reefs. Differences in concentrations of some elements In the otoliths of recruits allo\ved fish from the 2 env~ronments to be dlstinyuished 1~1 t h a high degree of dccuracy, enabling the contribution of estuarine recruitment to sustaining reef populations to be determined. Elemental composition of the juvenile core of otoliths from adults on reefs was related to the composition of otoliths of recruits from each environment to identify historical recruitment environments. Discriminant function analysis showed that 41 % of adults had recruited to estuaries and 59%) had recruited to reefs, but these figures may be overestimated because adults must be assigned to 1 of the 2 groups. There was evidence to suggest that some adults may form a third intermediate group. Further validation (e.g. comparison w~t h laser or probe based methods and tagging techniques) of our a p p r o~~c h is warranted. Elemental techniques may have great potential for resolving fisheries problems and identifying broader scale effects of environmental degradation.

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Electron probe microanalysis of fish otoliths — evaluation of techniques for studying age and stock discrimination

Cited by 94 publications

References 42 publications

Migratory behaviour and habitat use by American eels Anguilla rostrata as revealed by otolith microchemistry

Migratory behaviour and habitat use by American eels Anguilla rostrata as revealed by otolith microchemistry

Otolith chemical composition as a useful tool for sciaenid stock discrimination in the south-western Atlantic

Elements in otoliths may elucidate the contribution of estuarine recruitment to sustaining coastal reef populations of a temperate reef fish

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