Strontium-calcium concentration ratios in fish otoliths as environmental indicators

Radtke, Richard L.

doi:10.1016/0300-9629(89)90151-5

Cited by 132 publications

(93 citation statements)

References 21 publications

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“…1995 or temperature (Radtke 1989, Townsend et al 1992, there has been disagreement over which of the 2 environmental factors would be expected to be most influential in modifying otolith composition. Simple calculations, however, suggest that changes in salinity would generally be more detectable than would changes in temperature.…”

Section: Mean Temperaturementioning

confidence: 99%

Chemistry and composition of fish otoliths:pathways, mechanisms and applications

Campana¹

1999

Mar. Ecol. Prog. Ser.

1,788

1,932

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ABSTRACT:The fish otolith (earstone) has long been known as a timekeeper, but interest in its use as a metabolically inert environmental recorder has accelerated in recent years. In part due to technological advances, applications such as stock identification, determination of rnigralon pathways, reconstruction of temperature and salinity history, age validation, detection of anadromy, use as a natural tag and chemical mass marking have been developed, some of which are difficult or impossible to implement using alternative techniques. Microsamphg and the latest advances in beam-based probes allow many elemental assays to be coupled with daily or annual growth increments, thus providing a detailed chronologcal record of the environment. However, few workers have critically assessed the assumptions upon which the environmental reconstructions are based, or considered the possibility that elemental incorporation into the otolith may proceed differently than that into other calcified structures. This paper reviews current applications and their assumptions and suggests future directions. Particular attention is given to the premises that the elemental and isotopic composition of the otolith reflects that of the environment, and the effect of physiological filters on the resulting composition. The roles of temperature, elemental uptake into the fish and the process of otolith crystahzation are also assessed. Drawing upon recent advances i n geochemistry and paleoclirnate research as points of contrast, it appears that not all applications of otolith chemistry are firmly based, although others are destined to become powerful and perhaps routine tools for the mainstream fish biologst.

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Section: Mean Temperaturementioning

confidence: 99%

Chemistry and composition of fish otoliths:pathways, mechanisms and applications

Campana¹

1999

Mar. Ecol. Prog. Ser.

1,788

1,932

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show abstract

“…Recent chemical analytical techniques have enabled identification of life history events in individual fish by detecting trace elements in the microstructure of their otoliths (Kalish 1989, Radtke 1989, Radtke et al 1990). Oxygen isotope ratios (Nelson et al 1989, Tsukamoto et al 1989) and strontium (Sr) incorporation (Kalish 1989, Radtke 1989, Radtke et al 1990, Secor 1992, Townsend et al 1992, Tzeng and Tsai 1994, Secor et al 1995, Arai et al 1997 in fish otoliths are of special interest because of their potential utility as indicators of past environmental (temperature, salinity) and physiological conditions (ontogeny, migration).…”

Section: Introductionmentioning

confidence: 99%

“…Oxygen isotope ratios (Nelson et al 1989, Tsukamoto et al 1989) and strontium (Sr) incorporation (Kalish 1989, Radtke 1989, Radtke et al 1990, Secor 1992, Townsend et al 1992, Tzeng and Tsai 1994, Secor et al 1995, Arai et al 1997 in fish otoliths are of special interest because of their potential utility as indicators of past environmental (temperature, salinity) and physiological conditions (ontogeny, migration). The deposition of strontium (Sr) and calcium (Ca) in fish otoliths during their growth varies between freshwater and marine habitats (Casselman 1982, Kalish 1989, 1990, Radtke 1989, Secor 1992, Secor et al 1995, Tzeng et al 1997, Arai & Tsukamoto 1998). Freshwater contains low levels of Sr, while seawater contains high levels (Angino et al 1966).…”

Section: Introductionmentioning

confidence: 99%

Facultative catadromy of the eel Anguilla japonica between freshwater and seawater habitats

Tsukamoto

Arai²

2001

Mar. Ecol. Prog. Ser.

270

267

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“…Fish otolith microchemistry has suggested that otolith strontium (Sr)/calcium (Ca) ratios are correlated with external environmental factors such as ambient temperature (Radtke & Targett 1984, Radtke 1989, Radtke et al 1990, Townsend et al 1992) and salinity (Radtke et al 1988), and internal factors such as somatic growth rate (Sadovy & Severin 1992). It is also suggested that Sr incorporation in the otolith may be related to the total Ca-binding protein level in the blood plasma, which may vary with factors including growth, reproduction and stress, and not be directly affected by ambient water temperature (Kalish 1989(Kalish , 1991.…”

mentioning

confidence: 99%

“…Our examination of the otolith increment width also showed the similar pattern at ages 80 to 110 d, coincident with the ages at which both Sr content and Sr/Ca ratios changed dramatically. In various marine fishes, otolith Sr/Ca ratios have been reported to be inversely related to ambient water temperature (Radtke & Targett 1984, Radtke 1989, Townsend et al 1989, 1992, Radtke et al 1990). In contrast, the eel otolith Sr/Ca ratios decreased in the period when metamorphosing leptocephali possibly experienced rapid decrease in ambient water temperature.…”

mentioning

confidence: 99%

Drastic changes in otolith strontium/calcium ratios in leptocephali and glass eels of Japanese eel Anguilia /aponica

Otake¹,

Ishii²,

Nakahara³

et al. 1994

Mar. Ecol. Prog. Ser.

101

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Strontium (Sr) and calcium (Ca) contents and Sr/Ca ratios in otoliths of Japanese eel Anguilla japonica leptocephali and glass eels were examined. The Ca content was almost constant throughout the otoliths, except for the core, in which it was lower. Both Sr content and Sr/Ca ratios increased with age during the leptocephalus stage, but dramatically decreased at age 90 to 100 d. The otolith increment width also showed marked variation at ages 80 to 110 d, indicating the period of metamorphosis. These suggest that the changes in Sr content and Sr/Ca ratios are associated with metamorphosis. X-ray intensity maps revealed that the Sr content in glass eel otoliths increased for short periods at ages of about 20,50 and 90 d. Such changes seem to be related to events, such as beginning of vertical migration or differing current influences, occurring during the oceanic migration of Japanese eel leptocephali.

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Strontium-calcium concentration ratios in fish otoliths as environmental indicators

Cited by 132 publications

References 21 publications

Chemistry and composition of fish otoliths:pathways, mechanisms and applications

Chemistry and composition of fish otoliths:pathways, mechanisms and applications

Facultative catadromy of the eel Anguilla japonica between freshwater and seawater habitats

Drastic changes in otolith strontium/calcium ratios in leptocephali and glass eels of Japanese eel Anguilia /aponica

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