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Salinity-driven size variability in Cyprideis torosa (Ostracoda, Crustacea)

Ian Boomer, Peter Frenzel and Martin Feike
Salinity-driven size variability in Cyprideis torosa (Ostracoda, Crustacea) (in Thematic set; Cyprideis torosa, Anonymous)
Journal of Micropalaeontology (2016) 36 (1): 63-69


The living ostracod Cyprideis torosa (Jones, 1850) is geographically widespread, often abundant, occurring in modern and late Quaternary marginal-marine and athalassic environments world-wide. The species is capable of withstanding varying salinity over short (diurnal) timescales as well as adjusting to longer-term changes. Much attention has been paid in the past to the development of eco-phenotypic nodes and the shape of sieve-type pores on the external, lateral surfaces as indicators of particular salinity levels. In this paper we demonstrate a bimodal distribution between shell size (which can be determined directly from optical microscopy) and the salinity of the water in which the carapace formed. Between almost 'freshwater' salinity of about 1 ppm up to about 8 ppm the length of C. torosa increases linearly by about 10%, after this point there is a sharp break in the size-salinity relationship with carapace length reverting to values at or below those of freshwater and gradually declining in size by about 5% through the observed range (a maximum salinity of almost 40 ppm in this study). This switch in size-salinity relationship coincides with a physiologically important switch between hypo- and hyper-osmotic regulation at about 8 ppm known for C. torosa.

ISSN: 0262-821X
EISSN: 2041-4978
Serial Title: Journal of Micropalaeontology
Serial Volume: 36
Serial Issue: 1
Title: Salinity-driven size variability in Cyprideis torosa (Ostracoda, Crustacea)
Title: Thematic set; Cyprideis torosa
Author(s): Boomer, IanFrenzel, PeterFeike, Martin
Author(s): Anonymous
Affiliation: University of Birmingham, School of Geography, Earth and Environmental Sciences, Birmingham, United Kingdom
Pages: 63-69
Published: 2016
Text Language: English
Publisher: British Micropalaeontological Society, London, United Kingdom
References: 29
Accession Number: 2017-006372
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 5 tables
N53°47'60" - N53°47'60", E13°58'00" - E13°58'00"
N38°17'60" - N38°17'60", E53°04'60" - E53°04'60"
N52°36'00" - N52°36'00", E01°40'60" - E01°40'60"
N45°34'60" - N45°34'60", E60°04'00" - E60°04'00"
Secondary Affiliation: Friedrich-Schiller-Universitaet Jena, DEU, GermanyUniversitaet Rostock, DEU, Germany
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 201705
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